CA2194034A1 - Production of terephthalic acid with excellent optical properties through the use of pure or nearly pure oxygen as the oxidant in p-xylene oxidation - Google Patents
Production of terephthalic acid with excellent optical properties through the use of pure or nearly pure oxygen as the oxidant in p-xylene oxidationInfo
- Publication number
- CA2194034A1 CA2194034A1 CA002194034A CA2194034A CA2194034A1 CA 2194034 A1 CA2194034 A1 CA 2194034A1 CA 002194034 A CA002194034 A CA 002194034A CA 2194034 A CA2194034 A CA 2194034A CA 2194034 A1 CA2194034 A1 CA 2194034A1
- Authority
- CA
- Canada
- Prior art keywords
- pure
- production
- terephthalic acid
- oxidant
- optical properties
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
- C07C63/14—Monocyclic dicarboxylic acids
- C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
- C07C63/26—1,4 - Benzenedicarboxylic acid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
- C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
- B01J10/002—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor carried out in foam, aerosol or bubbles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/006—Baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1868—Stationary reactors having moving elements inside resulting in a loop-type movement
- B01J19/1875—Stationary reactors having moving elements inside resulting in a loop-type movement internally, i.e. the mixture circulating inside the vessel such that the upwards stream is separated physically from the downwards stream(s)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/20—Stationary reactors having moving elements inside in the form of helices, e.g. screw reactors
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
- C07C63/14—Monocyclic dicarboxylic acids
- C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
- C07C63/24—1,3 - Benzenedicarboxylic acid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
- C07C63/33—Polycyclic acids
- C07C63/337—Polycyclic acids with carboxyl groups bound to condensed ring systems
- C07C63/34—Polycyclic acids with carboxyl groups bound to condensed ring systems containing two condensed rings
- C07C63/38—Polycyclic acids with carboxyl groups bound to condensed ring systems containing two condensed rings containing two carboxyl groups both bound to carbon atoms of the condensed ring system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00245—Avoiding undesirable reactions or side-effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00761—Details of the reactor
- B01J2219/00763—Baffles
- B01J2219/00765—Baffles attached to the reactor wall
- B01J2219/0077—Baffles attached to the reactor wall inclined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00761—Details of the reactor
- B01J2219/00763—Baffles
- B01J2219/00765—Baffles attached to the reactor wall
- B01J2219/00777—Baffles attached to the reactor wall horizontal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Dispersion Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Abstract
The production of terephthalic acid by the oxidation of p-xylene is carried out in such a manner that the oxygen concentration in the liquid phase is maximized through the use of pure or nearly pure oxygen, while simultaneously the hydrocarbon feed concentration is minimized through rapid dilution with the reactor contents.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/586,022 | 1995-12-29 | ||
US08/586,022 US5696285A (en) | 1995-12-29 | 1995-12-29 | Production of terephthalic acid with excellent optical properties through the use of pure or nearly pure oxygen as the oxidant in p-xylene oxidation |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2194034A1 true CA2194034A1 (en) | 1997-06-30 |
CA2194034C CA2194034C (en) | 2001-06-12 |
Family
ID=24343985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002194034A Expired - Fee Related CA2194034C (en) | 1995-12-29 | 1996-12-27 | Production of terephthalic acid with excellent optical properties through the use of pure or nearly pure oxygen as the oxidant in p-xylene oxidation |
Country Status (12)
Country | Link |
---|---|
US (1) | US5696285A (en) |
EP (1) | EP0781754B1 (en) |
JP (1) | JPH09194425A (en) |
KR (1) | KR100307259B1 (en) |
CN (1) | CN1078878C (en) |
AR (1) | AR005299A1 (en) |
BR (1) | BR9606186A (en) |
CA (1) | CA2194034C (en) |
DE (1) | DE69610278T2 (en) |
ES (1) | ES2152481T3 (en) |
MX (1) | MX9700191A (en) |
PT (1) | PT781754E (en) |
Families Citing this family (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6362367B2 (en) | 1998-04-21 | 2002-03-26 | Union Carbide Chemicals & Plastics Technology Corp. | Preparation of organic acids |
US6153790A (en) * | 1998-12-01 | 2000-11-28 | Shell Oil Company | Method to produce aromatic dicarboxylic acids using cobalt and zirconium catalysts |
US6180822B1 (en) | 1998-12-22 | 2001-01-30 | Samsung General Chemical Co., Ltd. | Method of producing aromatic carboxylic acids by oxidizing alkyl aromatic compounds or partially oxidized intermediates thereof with carbon dioxide containing gas |
US6194607B1 (en) | 1998-12-22 | 2001-02-27 | Samsung General Chemicals Co., Ltd. | Method of producing aromatic carboxylic acids by oxidizing alkyl aromatic hydrocarbons or partially oxidized intermediates thereof |
KR20000041506A (en) | 1998-12-22 | 2000-07-15 | 유현식 | Method for the preparation of aromatic polycarbonic acid |
DE10206168A1 (en) * | 2002-02-14 | 2003-08-21 | Guehring Joerg | Coupling for modular tool holder arms |
US6657068B2 (en) | 2002-03-22 | 2003-12-02 | General Electric Company | Liquid phase oxidation of halogenated ortho-xylenes |
US6657067B2 (en) | 2002-03-22 | 2003-12-02 | General Electric Company | Method for the manufacture of chlorophthalic anhydride |
US6649773B2 (en) | 2002-03-22 | 2003-11-18 | General Electric Company | Method for the manufacture of halophthalic acids and anhydrides |
KR100881166B1 (en) * | 2002-09-16 | 2009-02-03 | 에스케이케미칼주식회사 | Method of preparing terephthalic acid |
AU2003293576A1 (en) * | 2002-12-16 | 2004-07-22 | E.I. Du Pont De Nemours And Company | Apparatus and method for forming crystals/precipitate/particles |
US7153480B2 (en) * | 2003-05-22 | 2006-12-26 | David Robert Bickham | Apparatus for and method of producing aromatic carboxylic acids |
US20050256335A1 (en) * | 2004-05-12 | 2005-11-17 | Ovidiu Marin | Providing gases to aromatic carboxylic acid manufacturing processes |
US7541489B2 (en) | 2004-06-30 | 2009-06-02 | Sabic Innovative Plastics Ip B.V. | Method of making halophthalic acids and halophthalic anhydrides |
US20060046217A1 (en) * | 2004-09-02 | 2006-03-02 | Parker Joseph L | Waste treatment system for PTA and PET manufacturing plants |
US7683210B2 (en) | 2004-09-02 | 2010-03-23 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7572936B2 (en) | 2004-09-02 | 2009-08-11 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7692037B2 (en) | 2004-09-02 | 2010-04-06 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7582793B2 (en) * | 2004-09-02 | 2009-09-01 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7741515B2 (en) | 2004-09-02 | 2010-06-22 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7504535B2 (en) | 2004-09-02 | 2009-03-17 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7589231B2 (en) | 2004-09-02 | 2009-09-15 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7507857B2 (en) | 2004-09-02 | 2009-03-24 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7568361B2 (en) | 2004-09-02 | 2009-08-04 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7692036B2 (en) | 2004-11-29 | 2010-04-06 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7910769B2 (en) | 2004-09-02 | 2011-03-22 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7381836B2 (en) | 2004-09-02 | 2008-06-03 | Eastman Chemical Company | Optimized liquid-phase oxidation |
KR20070103000A (en) * | 2004-12-20 | 2007-10-22 | 프로세스 디자인 센터 비.브이 | Process for preparing aromatic carboxylic acids |
US20060205974A1 (en) * | 2005-03-08 | 2006-09-14 | Lavoie Gino G | Processes for producing aromatic dicarboxylic acids |
US7550627B2 (en) * | 2005-03-08 | 2009-06-23 | Eastman Chemical Company | Processes for producing aromatic dicarboxylic acids |
US7834208B2 (en) * | 2005-05-19 | 2010-11-16 | Eastman Chemical Company | Process to produce a post catalyst removal composition |
US20060264656A1 (en) * | 2005-05-19 | 2006-11-23 | Fujitsu Limited | Enrichment process using compounds useful in a polyester process |
US20060264664A1 (en) * | 2005-05-19 | 2006-11-23 | Parker Kenny R | Esterification of an exchange solvent enriched composition |
US7880031B2 (en) * | 2005-05-19 | 2011-02-01 | Eastman Chemical Company | Process to produce an enrichment feed |
US7884231B2 (en) * | 2005-05-19 | 2011-02-08 | Eastman Chemical Company | Process to produce an enriched composition |
US20060264662A1 (en) * | 2005-05-19 | 2006-11-23 | Gibson Philip E | Esterification of an enriched composition |
US7557243B2 (en) * | 2005-05-19 | 2009-07-07 | Eastman Chemical Company | Enriched terephthalic acid composition |
US7897809B2 (en) * | 2005-05-19 | 2011-03-01 | Eastman Chemical Company | Process to produce an enrichment feed |
US7919652B2 (en) * | 2005-05-19 | 2011-04-05 | Eastman Chemical Company | Process to produce an enriched composition through the use of a catalyst removal zone and an enrichment zone |
US7304178B2 (en) * | 2005-05-19 | 2007-12-04 | Eastman Chemical Company | Enriched isophthalic acid composition |
US7741516B2 (en) | 2005-05-19 | 2010-06-22 | Eastman Chemical Company | Process to enrich a carboxylic acid composition |
US7432395B2 (en) * | 2005-05-19 | 2008-10-07 | Eastman Chemical Company | Enriched carboxylic acid composition |
US7884232B2 (en) | 2005-06-16 | 2011-02-08 | Eastman Chemical Company | Optimized liquid-phase oxidation |
US7355068B2 (en) * | 2006-01-04 | 2008-04-08 | Eastman Chemical Company | Oxidation system with internal secondary reactor |
US7888529B2 (en) | 2006-03-01 | 2011-02-15 | Eastman Chemical Company | Process to produce a post catalyst removal composition |
US20080179247A1 (en) * | 2007-01-30 | 2008-07-31 | Eastman Chemical Company | Elimination of Wastewater Treatment System |
US8080685B2 (en) * | 2007-06-27 | 2011-12-20 | H R D Corporation | System and process for production of benzoic acids and phthalic acids |
US9205388B2 (en) * | 2007-06-27 | 2015-12-08 | H R D Corporation | High shear system and method for the production of acids |
JP2010168327A (en) * | 2009-01-26 | 2010-08-05 | Ueno Fine Chem Ind Ltd | Method for producing 2,6-naphthalenedicarboxylic acid |
JP5168216B2 (en) * | 2009-04-10 | 2013-03-21 | 三菱瓦斯化学株式会社 | Oxidation reactor and process for producing aromatic polycarboxylic acids |
CN102309992A (en) * | 2010-06-30 | 2012-01-11 | 中国石油化工股份有限公司 | Method for recovering cobalt-manganese catalyst in para-dimethylbenzene oxidation mother liquor |
KR20200078221A (en) * | 2018-12-21 | 2020-07-01 | 한화솔루션 주식회사 | Batch reactor |
DE102022126030A1 (en) * | 2022-10-07 | 2024-04-18 | Skeleton Technologies GmbH | Fluidized bed reactor system and method for operating the same |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2833816A (en) * | 1954-05-03 | 1958-05-06 | Mid Century Corp | Preparation of aromatic polycarboxylic acids |
US3092658A (en) * | 1957-08-12 | 1963-06-04 | Standard Oil Co | Continuous system for oxidizing substituted aromatic hydrocarbons and producing carboxylic acids |
US3064044A (en) * | 1957-08-15 | 1962-11-13 | Standard Oil Co | Multistage oxidation system for preparing dicarboxylic acid |
US3089906A (en) * | 1958-04-21 | 1963-05-14 | Mid Century Corp | Oxidation chemical process |
US3089907A (en) * | 1958-04-21 | 1963-05-14 | Mid Century Corp | Pressure controlled liquid phase oxidation process for aromatic acid production |
JPS54109939A (en) * | 1978-02-15 | 1979-08-29 | Mitsui Petrochem Ind Ltd | Oxidation reactor for preparing aromatic carboxylic acid |
US4454077A (en) * | 1982-07-08 | 1984-06-12 | Union Carbide Corporation | Process and apparatus for mixing a gas and a liquid |
US4769487A (en) * | 1984-08-20 | 1988-09-06 | Amoco Corporation | Multistage oxidation in a single reactor |
US4835307A (en) * | 1984-12-13 | 1989-05-30 | Amoco Corporation | Method and apparatus for controlling the manufacture of terephthalic acid to control the level and variability of the contaminant content and the optical density |
US5099064A (en) * | 1985-12-30 | 1992-03-24 | Amoco Corporation | Method for increasing conversion efficiency for oxidation of an alkyl aromatic compound to an aromatic carboxylic acid |
US4900480A (en) * | 1986-10-21 | 1990-02-13 | Union Carbide Corporation | Gas-liquid mixing |
CA1280407C (en) * | 1986-10-21 | 1991-02-19 | Union Carbide Corporation | Gas-liquid mixing |
US5081290A (en) * | 1990-06-21 | 1992-01-14 | Amoco Corporation | Process for making aromatic polycarboxylic acids and oxidation catalyst system |
US5095146A (en) | 1991-03-25 | 1992-03-10 | Amoco Corporation | Water addition to crystallization train to purify terephthalic acid product |
JP3232774B2 (en) * | 1993-05-13 | 2001-11-26 | 三菱化学株式会社 | Method for producing high-purity terephthalic acid |
US5371283A (en) * | 1993-12-22 | 1994-12-06 | Praxair Technology, Inc. | Terephthalic acid production |
JP3725202B2 (en) * | 1994-05-11 | 2005-12-07 | プラクスエア・テクノロジー・インコーポレイテッド | Enhanced oxidation of organic chemicals |
US5523474A (en) * | 1994-05-11 | 1996-06-04 | Praxair Technology, Inc. | Terephthalic acid production using evaporative cooling |
-
1995
- 1995-12-29 US US08/586,022 patent/US5696285A/en not_active Expired - Fee Related
-
1996
- 1996-12-27 CN CN96123483A patent/CN1078878C/en not_active Expired - Fee Related
- 1996-12-27 EP EP96120911A patent/EP0781754B1/en not_active Expired - Lifetime
- 1996-12-27 AR ARP960105920A patent/AR005299A1/en unknown
- 1996-12-27 KR KR1019960073542A patent/KR100307259B1/en not_active IP Right Cessation
- 1996-12-27 CA CA002194034A patent/CA2194034C/en not_active Expired - Fee Related
- 1996-12-27 ES ES96120911T patent/ES2152481T3/en not_active Expired - Lifetime
- 1996-12-27 DE DE69610278T patent/DE69610278T2/en not_active Expired - Fee Related
- 1996-12-27 PT PT96120911T patent/PT781754E/en unknown
- 1996-12-27 BR BR9606186A patent/BR9606186A/en active Search and Examination
- 1996-12-27 JP JP8356677A patent/JPH09194425A/en active Pending
-
1997
- 1997-01-07 MX MX9700191A patent/MX9700191A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN1078878C (en) | 2002-02-06 |
KR100307259B1 (en) | 2001-11-30 |
JPH09194425A (en) | 1997-07-29 |
MX9700191A (en) | 1997-12-31 |
DE69610278T2 (en) | 2001-04-05 |
EP0781754A1 (en) | 1997-07-02 |
DE69610278D1 (en) | 2000-10-19 |
EP0781754B1 (en) | 2000-09-13 |
ES2152481T3 (en) | 2001-02-01 |
BR9606186A (en) | 1998-08-18 |
US5696285A (en) | 1997-12-09 |
KR970042472A (en) | 1997-07-24 |
AR005299A1 (en) | 1999-04-28 |
CN1160707A (en) | 1997-10-01 |
PT781754E (en) | 2001-02-28 |
CA2194034C (en) | 2001-06-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2194034A1 (en) | Production of terephthalic acid with excellent optical properties through the use of pure or nearly pure oxygen as the oxidant in p-xylene oxidation | |
CA2279510A1 (en) | Production of terephthalic acid | |
CA2063123A1 (en) | Method for producing hydrogen peroxide | |
CA2057980A1 (en) | Cellulose oxidation by a perfluorinated hydrocarbon solution of nitrogen dioxide | |
CA2153304A1 (en) | Process for the preparation of hydrogen and carbon monoxide containing mixtures | |
AU3030997A (en) | Oxidation catalyst and process for the production of epoxides from olefines, hydrogen and oxygen using said oxidation catalyst | |
AU6148300A (en) | Uv-activated chlorination | |
CA2098485A1 (en) | Process for preparing 2,6-naphthalenedicarboxylic acid | |
AU5119198A (en) | Preparation of hydrogen peroxide | |
BR9813838A (en) | Process and apparatus for converting a feed comprised of halogenated materials to one or more useful products. | |
CA2000307A1 (en) | Production of hydrogen peroxide | |
WO2002092501A8 (en) | Direct synthesis of hydrogen peroxide in a multicomponent solvent system | |
CA2100361A1 (en) | Bleaching of lignocellulosic material with activated oxygen | |
EP0676400A3 (en) | Method for production of pyromellitic anhydride | |
GR3002689T3 (en) | Process for producing 2-methyl-1,4-naphthoquinone | |
DE60203900D1 (en) | DIRECT SYNTHESIS OF HYDROGEN PEROXIDE IN A MULTICOMPONENT SOLVENT SYSTEM | |
EP0739905A4 (en) | Polymerization catalyst and process for producing styrene polymer therewith | |
EP0877012A3 (en) | Process for the production of high-purity dimethyl 2,6-naphthalenedicarboxylate and naphthalenedicarboxylic acid | |
JPS52111532A (en) | Production of high-purity terephthalic acid | |
ES463559A1 (en) | Process for preparing terephthalic acid | |
EP0494315A4 (en) | Process for producing 2-alkyl-6-ethyl-naphthalene | |
JPS56103131A (en) | Preparation of carboxylic acid chloride | |
CA2033555A1 (en) | Enhanced gas-liquid reactions | |
JPS52133942A (en) | Treatment of reaction mother liquor | |
JPS6479A (en) | Production of propylene oxide |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |