WO2010098695A1 - Supported liquid membrane and method for recovery of organic compounds from aqueous solutions - Google Patents
Supported liquid membrane and method for recovery of organic compounds from aqueous solutions Download PDFInfo
- Publication number
- WO2010098695A1 WO2010098695A1 PCT/RU2010/000054 RU2010000054W WO2010098695A1 WO 2010098695 A1 WO2010098695 A1 WO 2010098695A1 RU 2010000054 W RU2010000054 W RU 2010000054W WO 2010098695 A1 WO2010098695 A1 WO 2010098695A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- membrane
- liquid
- organic compounds
- recovery
- aqueous solutions
- Prior art date
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 60
- 239000007788 liquid Substances 0.000 title claims abstract description 42
- 239000007864 aqueous solution Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 24
- 150000002894 organic compounds Chemical class 0.000 title claims abstract description 18
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 7
- 230000008020 evaporation Effects 0.000 claims abstract description 7
- 150000001298 alcohols Chemical class 0.000 claims description 9
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 5
- 239000008158 vegetable oil Substances 0.000 claims description 5
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- 238000005373 pervaporation Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 235000019198 oils Nutrition 0.000 description 5
- -1 particularly Substances 0.000 description 5
- 239000012466 permeate Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000012510 hollow fiber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 229930182555 Penicillin Natural products 0.000 description 1
- JGSARLDLIJGVTE-MBNYWOFBSA-N Penicillin G Chemical compound N([C@H]1[C@H]2SC([C@@H](N2C1=O)C(O)=O)(C)C)C(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-MBNYWOFBSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000005687 corn oil Nutrition 0.000 description 1
- 239000002285 corn oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 238000000622 liquid--liquid extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008384 membrane barrier Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 229940049954 penicillin Drugs 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012465 retentate Substances 0.000 description 1
- 239000004447 silicone coating Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/362—Pervaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/38—Liquid-membrane separation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
- C07C29/84—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation by extractive distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
Definitions
- the present invention relates to a membrane process for recovery of organic compounds from organic/water solutions. More particularly, it relates to a liquid membrane for separation of alcohols, esters and other organic compounds from water and a method of using such membrane.
- Pervaporation is a method for the separation of mixtures of liquids by vaporization through a membrane.
- the membrane acts as a selective barrier between the two phases, the liquid phase feed and the vapor phase permeate. Pervaporation differs from all other membrane processes because of the permeate phase change.
- the driving force for transport of different components is provided by a chemical potential difference between the liquid feed/retentate and vapor permeate at each side of the membrane.
- the upstream side of the membrane is at ambient pressure and the downstream side is under vacuum (or by using sweep gas) to allow the evaporation of the selective component after permeation through the membrane.
- US 5755967 discloses a pervaporation process for the selective removal of acetone and/or butanol from an aqueous solution comprising acetone or butanol, or mixtures thereof.
- the silicalite, silicalite filled polymer membrane is suited to the removal of acetone and butanol from the aqueous solution.
- the driving force of the process is a pressure differential across the membrane, it comprises a vacuum on the permeate side of the membrane.
- EP 0470704 discloses a membrane comprising a porous support and a non-porous separating layer of a polyimine polymer for use in separating water from an aqueous charge mixture of organic oxygenate, for example isopropanol by pervaporation.
- a polyimine polymer for use in separating water from an aqueous charge mixture of organic oxygenate, for example isopropanol by pervaporation.
- Various materials can be used as membranes.
- Polymeric, ceramic, and liquid membranes have been used in the pervaporation process for removing organic compounds.
- Liquid membrane is a liquid phase existing either in supported or unsupported form that serves as a membrane barrier between two phases (Terminology for membranes and membrane processes (IUPAC Recommendations 1996, page 1486). In supported liquid membranes the organic phase is immobilized in the pores of a porous polymer.
- the polymeric support usually consists of ultra- or microporous membranes in the form of a sheet or hollow fiber or tube
- Liquid membranes generally provide high solvent selectivity compared with polymeric membranes and ceramic membranes and it makes liquid membranes an area of significant interest for the recovery of dilute amounts of solvents from aqueous solutions.
- US 5637224 relates to the removal of volatile organic compounds from aqueous solutions using a hollow fiber contained liquid membrane. Hollow fiber supported liquid membranes and plasma polymerized non-porous silicone coatings are disclosed.
- WO 0156933 discloses a supported liquid membrane immobilized in a microporous support material, particularly, polypropylene, polytetrafluoroethylene, polyethylene and like for the removal and recovery of one or more target species, for example penicillin, organic acids.
- liquid membranes have a tendency to degrade rapidly.
- the instability of liquid membranes presents a major problem and drawback with respect to their use.
- two significant problems arise because of the instability and degradation of liquid membranes.
- membrane selectivity significantly decreases, resulting in a permeation of water through the membrane.
- liquid membrane for recovery of organic compounds from aqueous solutions by diffuse evaporation through membrane by applying vacuum or gas wherein the liquid membrane is a layer of hydrophobic liquid on the surface of the aqueous solution.
- the hydrophobic liquid is synthetic and/or vegetable oil and/or higher alcohols.
- the present invention also relates to a method for recovery of organic compounds from aqueous solutions by diffuse evaporation through membrane by applying vacuum or gas wherein the membrane is a layer of hydrophobic liquid on the surface of the aqueous solution.
- the organic compounds are alcohols
- the hydrophobic liquid is synthetic and/or vegetable oil and/or higher alcohols.
- the thickness of the layer of the hydrophobic liquid is about 3-30 mm on the surface of the aqueous solution.
- the different oils such as synthetic oils, for example silicone oil, paraffin oil; vegetable oils, for example, corn oil, soy oil; some higher alcohols, higher fatty acids are used as the hydrophobic liquid. It is possible to use a mixture of the different oils.
- the use of the liquid membrane in such process is based on that the molecules of the organic solvents are diphilic, as they consist of hydrophilic (has affinity for polar media - water, for example hydroxyl - group in alcohols) and hydrophobic (has affinity for non-polar media, hydrocarbon radical) units.
- the diphilic molecules are oriented at the interface in a way that the hydrocarbon parts are in the hydrophobic phase and polar groups are in the aqueous solution.
- the layer of the hydrophobic liquid is an insuperable barrier for the molecules of water; hence the vapor pressure for water over the layer is negligible as opposed to the vapor pressure for the solvents.
- the molecules of the organic solvents When vacuum is applied to overhead of the layer of the hydrophobic liquid, the molecules of the organic solvents start to abandon the layer and are directed into a cooling device wherein the solvents are condensed.
- the difference of solvent concentration in the aqueous solution and gas (vacuum) results in the concentration gradient and the continuous flow of the molecules of the solvents take place from the aqueous solution through the layer into vacuuming overhead space.
- the advantages of the present invention are in providing a simple and economical, energy efficient method for recovery of organic compounds through the liquid membrane.
Abstract
The present invention relates to a liquid membrane for recovery of organic compounds from aqueous solutions by diffuse evaporation through membrane by applying vacuum or gas wherein the liquid membrane is a layer of hydrophobic liquid on the surface of the aqueous solution. Also the invention relates to a method for recovery of organic compounds from aqueous solutions by diffuse evaporation through the liquid membrane by applying vacuum or gas.
Description
SUPPORTED LIQUID MEMBRANE AND METHOD FOR RECOVERY OF ORGANIC COMPOUNDS FROM AQUEOUS SOLUTIONS
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a membrane process for recovery of organic compounds from organic/water solutions. More particularly, it relates to a liquid membrane for separation of alcohols, esters and other organic compounds from water and a method of using such membrane.
BACKGROUND OF THE INVENTION
Recovery of organic compounds from aqueous solutions has traditionally relied on methods such as distillation, liquid-liquid extraction, and adsorption. Recovery processes which involve the use of membranes for separating organic compounds from water have been used increasingly in recent years. Whereas conventional techniques such as distillation, adsorption and extraction are often relatively inadequate and uneconomical, application of membrane technology can save in process costs because energy consumption is low, and raw materials can be recovered and reused. Moreover, the process can be carried out continuously, and disposal problems can be reduced or eliminated. Membrane permeation methods, such as pervaporation, are alternatives which have been studied for recovery of organic compounds from dilute aqueous solutions.
Pervaporation is a method for the separation of mixtures of liquids by vaporization through a membrane. The membrane acts as a selective barrier between the two phases, the liquid phase feed and the vapor phase permeate. Pervaporation differs from all other membrane processes because of the permeate phase change. The driving force for transport of different components is provided by a chemical potential difference between the liquid feed/retentate and vapor permeate at each side of the membrane. Typically, the upstream side of the membrane is at ambient pressure and the downstream side is under vacuum (or by using sweep gas) to allow the evaporation of the selective component after permeation through the membrane.
US 5755967 discloses a pervaporation process for the selective removal of acetone and/or butanol from an aqueous solution comprising acetone or butanol, or mixtures thereof. The silicalite, silicalite filled polymer membrane is suited to the removal of acetone and butanol from the aqueous solution. The driving force of the process is a pressure differential across the membrane, it comprises a vacuum on the permeate side of the membrane.
EP 0470704 discloses a membrane comprising a porous support and a non-porous separating layer of a polyimine polymer for use in separating water from an aqueous charge mixture of organic oxygenate, for example isopropanol by pervaporation.
Various materials can be used as membranes. Polymeric, ceramic, and liquid membranes have been used in the pervaporation process for removing organic compounds. Liquid membrane is a liquid phase existing either in supported or unsupported form that serves as a membrane barrier between two phases (Terminology for membranes and membrane processes (IUPAC Recommendations 1996, page 1486). In supported liquid membranes the organic phase is immobilized in the pores of a porous polymer. The polymeric support usually consists of ultra- or microporous membranes in the form of a sheet or hollow fiber or tube.
Liquid membranes generally provide high solvent selectivity compared with polymeric membranes and ceramic membranes and it makes liquid membranes an area of significant interest for the recovery of dilute amounts of solvents from aqueous solutions.
US 5637224 relates to the removal of volatile organic compounds from aqueous solutions using a hollow fiber contained liquid membrane. Hollow fiber supported liquid membranes and plasma polymerized non-porous silicone coatings are disclosed.
WO 0156933 discloses a supported liquid membrane immobilized in a microporous support material, particularly, polypropylene, polytetrafluoroethylene, polyethylene and like for the removal and recovery of one or more target species, for example penicillin, organic acids.
However these membranes and processes using such membranes have the following principal drawbacks:
- difficulties coming from selection of materials for membrane because membranes must have not only high selectivity, performance and mechanical stability, but also withstand the contact with organic compounds at higher temperature;
- the liquid membranes have a tendency to degrade rapidly. The instability of liquid membranes presents a major problem and drawback with respect to their use. In particular, two significant problems arise because of the instability and degradation of liquid membranes. First, membrane selectivity significantly decreases, resulting in a permeation of water through the membrane.
- the membranes themselves are expensive to manufacture and suffer from a short lifetime, often requiring replacement.
Therefore there is a need in a simple and efficient, and economical membrane with low energy requirements for separating volatile organic compounds from water and a method of using such membrane.
BRIEF SUMMARY OF THE INVENTION
In accordance with the present invention, there is provided a liquid membrane for recovery of organic compounds from aqueous solutions by diffuse evaporation through
membrane by applying vacuum or gas wherein the liquid membrane is a layer of hydrophobic liquid on the surface of the aqueous solution.
The hydrophobic liquid is synthetic and/or vegetable oil and/or higher alcohols.
The present invention also relates to a method for recovery of organic compounds from aqueous solutions by diffuse evaporation through membrane by applying vacuum or gas wherein the membrane is a layer of hydrophobic liquid on the surface of the aqueous solution. In one preferred embodiment the organic compounds are alcohols, hi another preferred embodiment the hydrophobic liquid is synthetic and/or vegetable oil and/or higher alcohols. The thickness of the layer of the hydrophobic liquid is about 3-30 mm on the surface of the aqueous solution.
DETAILED DESCRIPTION OF THE INVENTION
In accordance with the present invention the different oils, such as synthetic oils, for example silicone oil, paraffin oil; vegetable oils, for example, corn oil, soy oil; some higher alcohols, higher fatty acids are used as the hydrophobic liquid. It is possible to use a mixture of the different oils.
The use of the liquid membrane in such process is based on that the molecules of the organic solvents are diphilic, as they consist of hydrophilic (has affinity for polar media - water, for example hydroxyl - group in alcohols) and hydrophobic (has affinity for non-polar media, hydrocarbon radical) units. The diphilic molecules are oriented at the interface in a way that the hydrocarbon parts are in the hydrophobic phase and polar groups are in the aqueous solution. The layer of the hydrophobic liquid is an insuperable barrier for the molecules of water; hence the vapor pressure for water over the layer is negligible as opposed to the vapor pressure for the solvents. When vacuum is applied to overhead of the layer of the hydrophobic liquid, the molecules of the organic solvents start to abandon the layer and are directed into a cooling device wherein the solvents are condensed. The difference of solvent concentration in the aqueous solution and gas (vacuum) results in the concentration gradient and the continuous flow of the molecules of the solvents take place from the aqueous solution through the layer into vacuuming overhead space.
The invention may be further understood by the following non-limiting examples.
Example 1
Into a vessel (is maintained under vacuum by a vacuum pump) with 100 ml of 23% aqueous butanol solution, silicone oil was layered on the liquid surface; thickness of layer was 15 mm. Butanol polar hydroxyl groups orient to the water phase with their fatty chains oriented towards the layer of the acid. Then the vacuum pump was started, and the permeate side was evacuated gradually (approximately 5 minutes). The pressure in the vessel was -0.04 atm abs.
Then the butanol vapors were condensed, in result 22 ml of condensate was obtained wherein the butanol content was 92%.
Example 2
Into a vessel with 100 ml of 17% aqueous ethyl acetate solution, soy oil was layered on the liquid surface; thickness of layer was 10 mm. Then the vacuum of -0.06 atm abs was applied and the vapors are removed and directed to the vapor condenser. 18 ml of the condensate moisture, contained 89% ethyl acetate was obtained.
The advantages of the present invention are in providing a simple and economical, energy efficient method for recovery of organic compounds through the liquid membrane.
Claims
1. A liquid membrane for recovery of organic compounds from aqueous solutions by diffuse evaporation through membrane by applying vacuum or gas wherein the liquid membrane is a layer of hydrophobic liquid on the surface of the aqueous solution.
2. The liquid membrane of Claim 1 wherein the hydrophobic liquid is synthetic and/or vegetable oil and/or higher alcohols.
3. A method for recovery of organic compounds from aqueous solutions by diffuse evaporation through membrane by applying vacuum or gas wherein the membrane is a layer of hydrophobic liquid on the surface of the aqueous solution.
4. The method of Claim 3 wherein the organic compounds are alcohols.
5. The method of Claim 3 wherein the hydrophobic liquid is synthetic and/or vegetable oil and/or higher alcohols.
6. The method of Claim 3 wherein the thickness of the layer of the hydrophobic liquid is about 3-30 mm on the surface of the aqueous solution.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2009106236/05A RU2409414C2 (en) | 2009-02-25 | 2009-02-25 | Liquid membrane to extract alcohols or ethers from water solutions, and method of releasing alcohols or ethers |
RU2009106236 | 2009-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010098695A1 true WO2010098695A1 (en) | 2010-09-02 |
Family
ID=42299484
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2010/000054 WO2010098695A1 (en) | 2009-02-25 | 2010-02-09 | Supported liquid membrane and method for recovery of organic compounds from aqueous solutions |
Country Status (2)
Country | Link |
---|---|
RU (1) | RU2409414C2 (en) |
WO (1) | WO2010098695A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5013447A (en) * | 1989-07-19 | 1991-05-07 | Sepracor | Process of treating alcoholic beverages by vapor-arbitrated pervaporation |
WO2008143704A2 (en) * | 2006-12-01 | 2008-11-27 | Gevo, Inc. | Engineered microorganisms for producing n-butanol and related methods |
-
2009
- 2009-02-25 RU RU2009106236/05A patent/RU2409414C2/en not_active IP Right Cessation
-
2010
- 2010-02-09 WO PCT/RU2010/000054 patent/WO2010098695A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5013447A (en) * | 1989-07-19 | 1991-05-07 | Sepracor | Process of treating alcoholic beverages by vapor-arbitrated pervaporation |
WO2008143704A2 (en) * | 2006-12-01 | 2008-11-27 | Gevo, Inc. | Engineered microorganisms for producing n-butanol and related methods |
Non-Patent Citations (4)
Title |
---|
MATSUMURA: "Energy saving effect of pervaporation using oleyl alcohol liquid membrane in butanol purification", BIOPROCESS ENGINEERING, SPRINGER VERLAG, DE, vol. 3, 1 January 1988 (1988-01-01), pages 93 - 100, XP009135942, ISSN: 0178-515X * |
TERMINOLOGY FOR MEMBRANES AND MEMBRANE PROCESSES (IUPAC RECOMMENDATIONS, 1996, pages 1486 |
WEILNHAMMER ET AL: "Continuous fermentation with product recovery by in-situ extraction", CHEMICAL ENGINEERING AND TECHNOLOGY, WEINHEIM, DE, vol. 17, no. 6, 1 January 1994 (1994-01-01), pages 365 - 373, XP009135992, ISSN: 0930-7516 * |
ZHONGPING SHI ET AL: "Performance evaluation of acetone-butanol continuous flash extractive fermentation process", BIOPROCESS AND BIOSYSTEMS ENGINEERING, SPRINGER, BERLIN, DE LNKD- DOI:10.1007/S00449-004-0396-7, vol. 27, no. 3, 1 May 2005 (2005-05-01), pages 175 - 183, XP019347336, ISSN: 1615-7605 * |
Also Published As
Publication number | Publication date |
---|---|
RU2409414C2 (en) | 2011-01-20 |
RU2009106236A (en) | 2010-08-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Liu et al. | Separation of acetone–butanol–ethanol (ABE) from dilute aqueous solutions by pervaporation | |
Schäfer et al. | Selective recovery of solutes from ionic liquids by pervaporation—a novel approach for purification and green processing | |
Brazinha et al. | Sustainable recovery of pure natural vanillin from fermentation media in a single pervaporation step | |
US4900402A (en) | Pervaporation process of separating a liquid mixture | |
CA2733039C (en) | Process for separating liquid mixtures by pervaporation | |
US9085476B2 (en) | Pervaporation membranes highly selective for volatile solvents present in fermentation broths | |
EP2190559B1 (en) | Dehydration processes using membranes with hydrophobic coating | |
US8597518B2 (en) | Pervaporation composite membrane for aqueous solution separation and methods for using the same | |
US9339771B2 (en) | Thin film pervaporation membranes | |
WO2006066269A2 (en) | Spiral-wound liquid membrane modules for separation of fluids and gases | |
WO2008118584A2 (en) | Liquid-phase and vapor-phase dehydration of organic/water solutions | |
CN101703898A (en) | PDMS/PVDF pervaporation composite membrane, preparation method and application thereof | |
Kujawski et al. | Dewatering of 2, 2, 3, 3-tetrafluoropropan-1-ol by hydrophilic pervaporation with poly (vinyl alcohol) based Pervap™ membranes | |
JP2945479B2 (en) | Treatment of taxane solutes using membranes | |
Hollein et al. | Concentration of dilute acetone-water solutions using pervaporation | |
CN102186780B (en) | Process for purification of an aqueous stream coming from fischer-tropsch reaction | |
WO2010098695A1 (en) | Supported liquid membrane and method for recovery of organic compounds from aqueous solutions | |
Basile et al. | Pervaporation and membrane contactors | |
Lee et al. | Separation recovery of dilute organics from aqueous solution by membrane distillation and selective condensation hybrid process | |
WO2010098696A1 (en) | Method for recovery of organic solvents from fermentation broth | |
WO2002050212A2 (en) | A process for deacidifying crude oil | |
CN113416605A (en) | Hydrolat extraction method and hydrolat extraction device | |
JP2005087890A (en) | Method and apparatus for concentrating fermented alcohol aqueous solution | |
EP2432578A1 (en) | Thin film pervaporation membranes | |
Schäfer et al. | Mass transport phenomena during the recovery of volatile compounds by pervaporation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10716644 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10716644 Country of ref document: EP Kind code of ref document: A1 |