CA1186651A - Hydrogen donor cracking with donor soaking of pitch - Google Patents
Hydrogen donor cracking with donor soaking of pitchInfo
- Publication number
- CA1186651A CA1186651A CA000414261A CA414261A CA1186651A CA 1186651 A CA1186651 A CA 1186651A CA 000414261 A CA000414261 A CA 000414261A CA 414261 A CA414261 A CA 414261A CA 1186651 A CA1186651 A CA 1186651A
- Authority
- CA
- Canada
- Prior art keywords
- pitch
- donor
- cracking
- hydrogen
- hydrogen donor
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
- C10G47/32—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions in the presence of hydrogen-generating compounds
- C10G47/34—Organic compounds, e.g. hydrogenated hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G51/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more cracking processes only
- C10G51/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more cracking processes only plural serial stages only
- C10G51/023—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more cracking processes only plural serial stages only only thermal cracking steps
Abstract
HYDROGEN DONOR CRACKING WITH DONOR SOAKING
OF PITCH
Abstract of the Disclosure A hydrogen donor diluent cracking process in which the pitch fraction from the cracking step is heat soaked in the presence of hydrogen donor solvent and then returned to the cracking coil.
OF PITCH
Abstract of the Disclosure A hydrogen donor diluent cracking process in which the pitch fraction from the cracking step is heat soaked in the presence of hydrogen donor solvent and then returned to the cracking coil.
Description
HYDROGEN DONOR CRACKING WITH
DOPIER SOAKING OF Plush Background of the_Tnvention I Field of the Invention This invention relates to a process or upgrading residual hydrocarbon oils to more allele product and more particularly Jo a process wherein hydrogen deficient residual petroleum oils are thermally cracked in the presence of a hydrogen donor delineate.
DOPIER SOAKING OF Plush Background of the_Tnvention I Field of the Invention This invention relates to a process or upgrading residual hydrocarbon oils to more allele product and more particularly Jo a process wherein hydrogen deficient residual petroleum oils are thermally cracked in the presence of a hydrogen donor delineate.
2. Description of the Prior Art known in the art to upgrade hydrogen deficient residual petroleum oils (resin) by thermally cracking the resin in admixture with a hydrogen donor delineate. The hydrogen donor delineate is a material, generally aromatic-napthenic in nature, that has the ability to take up hydrogen under mild hydrogenation conditions and to readily release the hydrogen to a hydrogen deficient resin under thermal cracking conditions.
One of the principal advantages of the hydrogen donor 28 delineate cracking (HDDC~ process is that it can upgrade resins which are not readily amenable to other conversion processes, and another principal advantage it that it : can provide high conversions in thy absence of a catal~t and with a minimum of coke deposition. The cracked materials produced by the HDDC process are readily recovered as desirable products including light ends and a gasoline fraction, and the hydrogen donor delineate can be recovered by fractionation of the cracked products and recycled through the hydrogenation step for reuse as donor delineate in the cracking unit.
The HDDC process is well known in the art, and a comprehensive description of the process including materials, flows, and operating conditions, appear in U.S. Patent 2,953,513. Variation of the HDDC process, particularly as to the make-up of the hydrogen donor Jo ': I;
dlluent, are described in USE Patents 2,873,245 and ~,238,118. Hydrogen donors proposed in the prior art include relatively low boiling, pure, and expensive compound such as naphth~lene, tetralin~ decline, anthracene? and thy like. These compounds have generally been considered unsatisfactory for a commercial operation because of their expense and other difficulties inherent in their us More practical hydrogen donor delineates suggested by prior art include partially hydrogenated catalytic cycle oil, a partially hydrogenated lubricating oil extract or other partially hydrogenated aromatic Hydrogen donor usually contain condensed ring aromatics in sufficient quantities to serve as a hydrogen carrier.
'Reese aromatic are partially hydrogenated; there is IS added to them some easily removable hydrogen atoms but not enough to convert the aromatics substantially to naphthene~.
U.S. Patent 4,101,416 describes upgrading of tars derived from pyrolyzes ox coal by hydrogenation, and mentions that hydrogen donor solvents can play a role in this upgrading.
U.S. Patent 4,090,947 describes a hydrogen delineate cracking process in which the donor is derived from a premium coking operation 25 Seymour Invention According to the present invention, at least part of the pitch fraction from a hydrogen donor delineate cracking operation is heat soaked in the presence of a hydrogen donor solvent for a time and at a temperature sufficient to reduce the amount of heavy asphaltenes in the pitch The heat soaked pitch is then returned to the cracking coil where additional cracked products are produced from the donor soaked pitch.
.
One of the principal advantages of the hydrogen donor 28 delineate cracking (HDDC~ process is that it can upgrade resins which are not readily amenable to other conversion processes, and another principal advantage it that it : can provide high conversions in thy absence of a catal~t and with a minimum of coke deposition. The cracked materials produced by the HDDC process are readily recovered as desirable products including light ends and a gasoline fraction, and the hydrogen donor delineate can be recovered by fractionation of the cracked products and recycled through the hydrogenation step for reuse as donor delineate in the cracking unit.
The HDDC process is well known in the art, and a comprehensive description of the process including materials, flows, and operating conditions, appear in U.S. Patent 2,953,513. Variation of the HDDC process, particularly as to the make-up of the hydrogen donor Jo ': I;
dlluent, are described in USE Patents 2,873,245 and ~,238,118. Hydrogen donors proposed in the prior art include relatively low boiling, pure, and expensive compound such as naphth~lene, tetralin~ decline, anthracene? and thy like. These compounds have generally been considered unsatisfactory for a commercial operation because of their expense and other difficulties inherent in their us More practical hydrogen donor delineates suggested by prior art include partially hydrogenated catalytic cycle oil, a partially hydrogenated lubricating oil extract or other partially hydrogenated aromatic Hydrogen donor usually contain condensed ring aromatics in sufficient quantities to serve as a hydrogen carrier.
'Reese aromatic are partially hydrogenated; there is IS added to them some easily removable hydrogen atoms but not enough to convert the aromatics substantially to naphthene~.
U.S. Patent 4,101,416 describes upgrading of tars derived from pyrolyzes ox coal by hydrogenation, and mentions that hydrogen donor solvents can play a role in this upgrading.
U.S. Patent 4,090,947 describes a hydrogen delineate cracking process in which the donor is derived from a premium coking operation 25 Seymour Invention According to the present invention, at least part of the pitch fraction from a hydrogen donor delineate cracking operation is heat soaked in the presence of a hydrogen donor solvent for a time and at a temperature sufficient to reduce the amount of heavy asphaltenes in the pitch The heat soaked pitch is then returned to the cracking coil where additional cracked products are produced from the donor soaked pitch.
.
3 -It is an object of the present invention to reduce the amount of pitch produced from a hydrogen donor delineate cracking process.
It is a further object Jo increase the amount 5 of cracked products produced prom a hydrogen donor delineate cracking process.
The foregoing as well as additional objects and advantages are provided by this invention, as will be apparent from consideration of the following detailed description of the preferred embodiments thereof.
Brief Description of the Drawings The Figure is a schematic representation of the improved H~DC process in accordance with the invention.
The basic hydrogen donor delineate cracking (H~DC) process to which the present invention pertains is thoroughly described in the aforementioned prior art. The present invention is a refinement of the basic process, and provides increased amounts of more valuable cracked products and reduced (or Nero) amounts of less valuable pitch. The invention in effect transforms the untracked (and generally uncrackable) pitch fraction from an HDDC process into trackable components, with a resultant upgraded product distribution compare to a conventional HDDC process.
The figure shows the basic units of an HDDC
process, and additionally shows means for accomplishing the objects of the invention.
rush feed stock to the HDDC process enters cracking furnace 10 from line 12. Hydrogenated donor solvent from line 14 joy no the fresh feed before it enters furnace 10. Cracked products from furnace 10 pass to fractionator 16 where cracked products, spent donor and pitch are recovered through Hines 18, 20, and 22 respectively. Spent donor from fractionator 16 is rehydroge~ated in hydro~reater 24, and rehydrotreated donor from hydrotreater 24 is returned to furnace I
The foregoing general description of the HDDC
process conforms to the known art, and various feed stocks, donors, operating conditions, etc., axe known in the art.
The essential novel portion of the illustrated process on accordance with the invention involves taking a part of the rehydrogen~ted donor from line 14 and passing it to a soaking Yank 26. At least part of the pitch fraction from fractionator 16 is also passed I to soaking tank 26. Any net make of honor is recovered from line 28, and any makeup donor needed is provided through line 30. If less than all of the pitch is to be donor soaked, net pitch is recovered through line 32.
In some cases the pitch can ye recycled Jo extinction, end there will be no net pitch product.
All of the donor soaked pitch from tank 26 preferably is returned to furnace 10 through line 34l although if desired a side stream could be recovered.
The operable ratio of donor to pitch in I tank 26 is not exactly determined, but generally will be within the range of 1-5 to Sol volumes of donor for each volume of pitch. Preferably, about 0.5 to 2.0 volumes of donor are used for each volume of pitch.
Conditions in the soaking tank can vary I considerably/ but generally should be at least about 500F
in order to obtain a useful rate of hydrogen transfer, and generally should be below about 850F to avoid signify leant cracking in the soaking tank. The pressure should be adequate to prevent significant vaporization I of the solvent a the temperature being used.
The residence time in soaking tank 26 is inversely proportional to the emperor, and can range from jays at 500F to minutes at 850~. Preferably, a temperature of 600-700~F and a residence time of 1 - 3 hour are utilized.
.
The effectiveness of the process of the inv~nkion in upgrading hydrogen donor pitch to trackable ma~erlal can ye demon rated my comparing the level of pontoon, Tulane and tetrahydrofuran (THY) insoluble in untreated pitch and in the same pitch after heat soaking in a hydrogen donor solvent. The results of such a co~parisGn are shown below for an actual HDDC
pitch material before and after being soaked in an equal volume of hydrogen donor solvent at 675F or 2 hours:
SOLUBLES BEFORE DONOR SOAKING
(Wet Percent) PPh~ane ~oluene THY
INSO~UBLES AFTER DONOR SOAKING
_ (White recent Pentarle qtoluene THY
8 nil nil The above illustrates thaw more thaw half of asphaltic material in the pitch was converted. More severe conditions could be utilized to increase the conversion, and add tonal passes such as from repeated soaking after additional crookneck would also further reduce the amount of a~phaltic material. It is possible to recycle the pitch to extinction in some cases by simply no drawing any pitch product from the fractionator.
In most cases, however, some pitch will be removed to prevent a buildup of metals contaminants and to rewove intractable components from the system.
The foregoing description of the preferred embodiments ox the invention it intended Jo be illiterate I
rather than limiting. Variations and modifications will be apparent within the true scope owe the invention, which is dined in the appended claims:
.. . .
It is a further object Jo increase the amount 5 of cracked products produced prom a hydrogen donor delineate cracking process.
The foregoing as well as additional objects and advantages are provided by this invention, as will be apparent from consideration of the following detailed description of the preferred embodiments thereof.
Brief Description of the Drawings The Figure is a schematic representation of the improved H~DC process in accordance with the invention.
The basic hydrogen donor delineate cracking (H~DC) process to which the present invention pertains is thoroughly described in the aforementioned prior art. The present invention is a refinement of the basic process, and provides increased amounts of more valuable cracked products and reduced (or Nero) amounts of less valuable pitch. The invention in effect transforms the untracked (and generally uncrackable) pitch fraction from an HDDC process into trackable components, with a resultant upgraded product distribution compare to a conventional HDDC process.
The figure shows the basic units of an HDDC
process, and additionally shows means for accomplishing the objects of the invention.
rush feed stock to the HDDC process enters cracking furnace 10 from line 12. Hydrogenated donor solvent from line 14 joy no the fresh feed before it enters furnace 10. Cracked products from furnace 10 pass to fractionator 16 where cracked products, spent donor and pitch are recovered through Hines 18, 20, and 22 respectively. Spent donor from fractionator 16 is rehydroge~ated in hydro~reater 24, and rehydrotreated donor from hydrotreater 24 is returned to furnace I
The foregoing general description of the HDDC
process conforms to the known art, and various feed stocks, donors, operating conditions, etc., axe known in the art.
The essential novel portion of the illustrated process on accordance with the invention involves taking a part of the rehydrogen~ted donor from line 14 and passing it to a soaking Yank 26. At least part of the pitch fraction from fractionator 16 is also passed I to soaking tank 26. Any net make of honor is recovered from line 28, and any makeup donor needed is provided through line 30. If less than all of the pitch is to be donor soaked, net pitch is recovered through line 32.
In some cases the pitch can ye recycled Jo extinction, end there will be no net pitch product.
All of the donor soaked pitch from tank 26 preferably is returned to furnace 10 through line 34l although if desired a side stream could be recovered.
The operable ratio of donor to pitch in I tank 26 is not exactly determined, but generally will be within the range of 1-5 to Sol volumes of donor for each volume of pitch. Preferably, about 0.5 to 2.0 volumes of donor are used for each volume of pitch.
Conditions in the soaking tank can vary I considerably/ but generally should be at least about 500F
in order to obtain a useful rate of hydrogen transfer, and generally should be below about 850F to avoid signify leant cracking in the soaking tank. The pressure should be adequate to prevent significant vaporization I of the solvent a the temperature being used.
The residence time in soaking tank 26 is inversely proportional to the emperor, and can range from jays at 500F to minutes at 850~. Preferably, a temperature of 600-700~F and a residence time of 1 - 3 hour are utilized.
.
The effectiveness of the process of the inv~nkion in upgrading hydrogen donor pitch to trackable ma~erlal can ye demon rated my comparing the level of pontoon, Tulane and tetrahydrofuran (THY) insoluble in untreated pitch and in the same pitch after heat soaking in a hydrogen donor solvent. The results of such a co~parisGn are shown below for an actual HDDC
pitch material before and after being soaked in an equal volume of hydrogen donor solvent at 675F or 2 hours:
SOLUBLES BEFORE DONOR SOAKING
(Wet Percent) PPh~ane ~oluene THY
INSO~UBLES AFTER DONOR SOAKING
_ (White recent Pentarle qtoluene THY
8 nil nil The above illustrates thaw more thaw half of asphaltic material in the pitch was converted. More severe conditions could be utilized to increase the conversion, and add tonal passes such as from repeated soaking after additional crookneck would also further reduce the amount of a~phaltic material. It is possible to recycle the pitch to extinction in some cases by simply no drawing any pitch product from the fractionator.
In most cases, however, some pitch will be removed to prevent a buildup of metals contaminants and to rewove intractable components from the system.
The foregoing description of the preferred embodiments ox the invention it intended Jo be illiterate I
rather than limiting. Variations and modifications will be apparent within the true scope owe the invention, which is dined in the appended claims:
.. . .
Claims
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
Claim 1 In a hydrogen donor diluent cracking process in which a heavy hydrocarbonaceous material is thermally cracked in a cracking coil in the presence of hydrogen donor solvent, and in which spent donor is separated from cracked products, rehydrogenated and recycled to the cracking step, the improvement wherein at least part of the pitch fraction from the cracked products is contacted with hydrogenated donor solvent and returned to the thermal cracking coil.
Claim 2 The process of Claim 1 wherein at least part of said pitch fraction is heat soaked in the presence of hydrogenated donor solvent for a time and at a temperature sufficient to substantially reduce the amount of material in said pitch which is insoluble in pentane.
Claim 3 The process of Claim 2 wherein the entire pitch fraction from said cracked products is heat soaked.
Claim 4 The process of Claim 2 wherein said part of said pitch fraction is heat soaked for a temperature of from 500 to 850°F.
Claim 5 The process of Claim 4 wherein said part of said pitch fraction is heat soaked for a period of from 1 to 3 hours at a temperature of from 600 to 700°F.
Claim 6 The process of Claim 4 wherein said part of said pitch fraction is heat soaked until the amount of pentane insolubles in said pitch fraction is reduced by more than 50 percent.
Claim 7 The process of Claim 4 wherein said part of said pitch fraction is heat soaked in the presence of from 0.5 to 2.0 volumes of hydrogen donor solvent per volume of pitch treated.
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
Claim 1 In a hydrogen donor diluent cracking process in which a heavy hydrocarbonaceous material is thermally cracked in a cracking coil in the presence of hydrogen donor solvent, and in which spent donor is separated from cracked products, rehydrogenated and recycled to the cracking step, the improvement wherein at least part of the pitch fraction from the cracked products is contacted with hydrogenated donor solvent and returned to the thermal cracking coil.
Claim 2 The process of Claim 1 wherein at least part of said pitch fraction is heat soaked in the presence of hydrogenated donor solvent for a time and at a temperature sufficient to substantially reduce the amount of material in said pitch which is insoluble in pentane.
Claim 3 The process of Claim 2 wherein the entire pitch fraction from said cracked products is heat soaked.
Claim 4 The process of Claim 2 wherein said part of said pitch fraction is heat soaked for a temperature of from 500 to 850°F.
Claim 5 The process of Claim 4 wherein said part of said pitch fraction is heat soaked for a period of from 1 to 3 hours at a temperature of from 600 to 700°F.
Claim 6 The process of Claim 4 wherein said part of said pitch fraction is heat soaked until the amount of pentane insolubles in said pitch fraction is reduced by more than 50 percent.
Claim 7 The process of Claim 4 wherein said part of said pitch fraction is heat soaked in the presence of from 0.5 to 2.0 volumes of hydrogen donor solvent per volume of pitch treated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/365,721 US4430197A (en) | 1982-04-05 | 1982-04-05 | Hydrogen donor cracking with donor soaking of pitch |
| US365,721 | 1982-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1186651A true CA1186651A (en) | 1985-05-07 |
Family
ID=23440063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000414261A Expired CA1186651A (en) | 1982-04-05 | 1982-10-27 | Hydrogen donor cracking with donor soaking of pitch |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4430197A (en) |
| CA (1) | CA1186651A (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4514282A (en) * | 1983-07-21 | 1985-04-30 | Conoca Inc. | Hydrogen donor diluent cracking process |
| JPS61163992A (en) * | 1985-01-16 | 1986-07-24 | Fuji Standard Res Kk | Continuously producing pitch suitable for use as raw material of carbon fiber |
| JPS61163991A (en) * | 1985-01-16 | 1986-07-24 | Fuji Standard Res Kk | Continuously producing pitch suitable as raw material of carbon fiber |
| US4661241A (en) * | 1985-04-01 | 1987-04-28 | Mobil Oil Corporation | Delayed coking process |
| US4698147A (en) * | 1985-05-02 | 1987-10-06 | Conoco Inc. | Short residence time hydrogen donor diluent cracking process |
| CA1291057C (en) * | 1986-12-19 | 1991-10-22 | Junichi Kubo | Method for hydrocracking heavy fraction oils |
| US5215649A (en) * | 1990-05-02 | 1993-06-01 | Exxon Chemical Patents Inc. | Method for upgrading steam cracker tars |
| US5711870A (en) * | 1996-05-28 | 1998-01-27 | Texaco Inc. | Delayed coking process with water and hydrogen donors |
| US7645375B2 (en) * | 2003-05-16 | 2010-01-12 | Exxonmobil Research And Engineering Company | Delayed coking process for producing free-flowing coke using low molecular weight aromatic additives |
| ES2543404T3 (en) * | 2003-05-16 | 2015-08-19 | Exxonmobil Research And Engineering Company | Delayed coking process for fluid shot coke production |
| US7658838B2 (en) * | 2003-05-16 | 2010-02-09 | Exxonmobil Research And Engineering Company | Delayed coking process for producing free-flowing coke using polymeric additives |
| US20050279673A1 (en) * | 2003-05-16 | 2005-12-22 | Eppig Christopher P | Delayed coking process for producing free-flowing coke using an overbased metal detergent additive |
| CA2564216C (en) * | 2004-05-14 | 2011-03-29 | Exxonmobil Research And Engineering Company | Production and removal of free-flowing coke from delayed coker drum |
| AU2005245863A1 (en) * | 2004-05-14 | 2005-12-01 | Exxonmobil Research And Engineering Company | Blending of resid feedstocks to produce a coke that is easier to remove from a coker drum |
| WO2005113707A1 (en) * | 2004-05-14 | 2005-12-01 | Exxonmobil Research And Engineering Company | Viscoelastic upgrading of heavy oil by altering its elastic modulus |
| EP1751257A2 (en) * | 2004-05-14 | 2007-02-14 | Exxonmobil Research And Engineering Company | Inhibitor enhanced thermal upgrading of heavy oils |
| CA2564048A1 (en) * | 2004-05-14 | 2005-12-01 | Exxonmobil Research And Engineering Company | Delayed coking process for the production of substantially free-flowing coke from a deeper cut of vacuum resid |
| US7871510B2 (en) * | 2007-08-28 | 2011-01-18 | Exxonmobil Research & Engineering Co. | Production of an enhanced resid coker feed using ultrafiltration |
| US7794587B2 (en) * | 2008-01-22 | 2010-09-14 | Exxonmobil Research And Engineering Company | Method to alter coke morphology using metal salts of aromatic sulfonic acids and/or polysulfonic acids |
| US8197668B2 (en) * | 2009-07-09 | 2012-06-12 | Exxonmobil Chemical Patents Inc. | Process and apparatus for upgrading steam cracker tar using hydrogen donor compounds |
| US9127216B2 (en) | 2013-05-07 | 2015-09-08 | Uop Llc | Process and apparatus for recycling a deashed pitch |
| US10081769B2 (en) | 2014-11-24 | 2018-09-25 | Husky Oil Operations Limited | Partial upgrading system and method for heavy hydrocarbons |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA553169A (en) | 1958-02-11 | Esso Research And Engineering Company | Upgrading of heavy hydrocarbons | |
| GB786451A (en) | 1954-08-20 | 1957-11-20 | Exxon Research Engineering Co | Improvements in or relating to residuum conversion process |
| US2873245A (en) | 1954-12-15 | 1959-02-10 | Exxon Research Engineering Co | Heavy oil conversion process |
| US3238118A (en) | 1962-11-06 | 1966-03-01 | Exxon Research Engineering Co | Conversion of hydrocarbons in the presence of a hydrogenated donor diluent |
| US3817853A (en) | 1972-05-30 | 1974-06-18 | Union Oil Co | Coking of pyrolysis tars |
| US4090947A (en) | 1976-06-04 | 1978-05-23 | Continental Oil Company | Hydrogen donor diluent cracking process |
| US4101416A (en) | 1976-06-25 | 1978-07-18 | Occidental Petroleum Corporation | Process for hydrogenation of hydrocarbon tars |
| US4115246A (en) | 1977-01-31 | 1978-09-19 | Continental Oil Company | Oil conversion process |
| US4178229A (en) | 1978-05-22 | 1979-12-11 | Conoco, Inc. | Process for producing premium coke from vacuum residuum |
| US4213846A (en) | 1978-07-17 | 1980-07-22 | Conoco, Inc. | Delayed coking process with hydrotreated recycle |
| US4363716A (en) | 1981-02-26 | 1982-12-14 | Greene Marvin I | Cracking of heavy carbonaceous liquid feedstocks utilizing hydrogen donor solvent |
-
1982
- 1982-04-05 US US06/365,721 patent/US4430197A/en not_active Expired - Fee Related
- 1982-10-27 CA CA000414261A patent/CA1186651A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4430197A (en) | 1984-02-07 |
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Legal Events
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| MKEC | Expiry (correction) | ||
| MKEX | Expiry |