BE844417A - Composition catalytique pour la conversion de composes organiques - Google Patents

Composition catalytique pour la conversion de composes organiques

Info

Publication number: BE844417A
Authority: BE; Belgium
Prior art keywords: conversion; organic compounds; catalytic composition; catalytic; composition
Prior art date: 1975-11-24

Application number

BE169155A

Other languages

Priority date (The priority date 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 date listed.)

1975-11-24

Filing date

1976-07-22

Publication date

1977-01-24

1976-07-22 Application filed filed Critical

1977-01-24 Publication of BE844417A publication Critical patent/BE844417A/fr

Classifications

- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/868—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains sulfur as hetero-atom
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J29/48—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing arsenic, antimony, bismuth, vanadium, niobium tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/90—Regeneration or reactivation
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
- C07C2/864—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms the non-hydrocarbon is an alcohol
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
- C07C2/865—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms the non-hydrocarbon is an ether
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C6/00—Preparation of hydrocarbons from hydrocarbons containing a different number of carbon atoms by redistribution reactions
- C07C6/08—Preparation of hydrocarbons from hydrocarbons containing a different number of carbon atoms by redistribution reactions by conversion at a saturated carbon-to-carbon bond
- C07C6/12—Preparation of hydrocarbons from hydrocarbons containing a different number of carbon atoms by redistribution reactions by conversion at a saturated carbon-to-carbon bond of exclusively hydrocarbons containing a six-membered aromatic ring
- C07C6/123—Preparation of hydrocarbons from hydrocarbons containing a different number of carbon atoms by redistribution reactions by conversion at a saturated carbon-to-carbon bond of exclusively hydrocarbons containing a six-membered aromatic ring of only one hydrocarbon
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
- C07C2523/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- C07C2523/18—Arsenic, antimony or bismuth
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2529/00—Catalysts comprising molecular sieves
- C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
- C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- C07C2529/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- C07C2529/48—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11 containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- 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
- 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
- Y02P20/584—Recycling of catalysts

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Chemical Kinetics & Catalysis (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Crystallography & Structural Chemistry (AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Catalysts (AREA)
Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

BE169155A 1975-11-24 1976-07-22 Composition catalytique pour la conversion de composes organiques BE844417A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US05/634,992 US4007231A (en)	1975-11-24	1975-11-24	Selective production of para-xylene

Publications (1)

Publication Number	Publication Date
BE844417A true BE844417A (fr)	1977-01-24

Family

ID=24545975

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE169155A BE844417A (fr)	1975-11-24	1976-07-22	Composition catalytique pour la conversion de composes organiques

Country Status (12)

Country	Link
US (4)	US4007231A (fr)
JP (1)	JPS5265229A (fr)
BE (1)	BE844417A (fr)
CA (1)	CA1077455A (fr)
CS (1)	CS211352B2 (fr)
DD (1)	DD131728A5 (fr)
DE (1)	DE2633881A1 (fr)
FR (1)	FR2332057A1 (fr)
IT (1)	IT1064729B (fr)
NL (1)	NL182056C (fr)
PL (1)	PL118516B1 (fr)
RO (1)	RO71011A (fr)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4029716A (en) *	1975-12-08	1977-06-14	Mobil Oil Corporation	Selective production of para-xylene
US4049573A (en) *	1976-02-05	1977-09-20	Mobil Oil Corporation	Zeolite catalyst containing oxide of boron or magnesium
US4086287A (en) *	1976-07-19	1978-04-25	Mobil Oil Corporation	Selective ethylation of mono alkyl benzenes
US4101596A (en) *	1977-01-10	1978-07-18	Mobil Oil Company	Low pressure xylene isomerization
US4111845A (en) *	1977-02-11	1978-09-05	Mckay Dwight L	Cracking catalyst modified by antimony thiophosphate
US4198317A (en) *	1978-07-25	1980-04-15	Phillips Petroleum Company	Passivation of metals which contaminate cracking catalysts with antimony tris (hydrocarbyl sulfonate)
US4257876A (en) *	1978-07-25	1981-03-24	Phillips Petroleum Company	Passivation of metals contaminating a cracking catalyst with trihydrocarbylantimony oxide and process for converting hydrocarbons
AU530334B2 (en) *	1978-09-11	1983-07-14	Mobil Oil Corp.	Regeneration of zeolite catalyst
US4330396A (en) *	1978-10-18	1982-05-18	Chevron Research Company	Cyclic process for upgrading a hydrocarbon or hydrocarbon-forming feed using a ZSM-5 zeolite
DE3061073D1 (en) *	1979-12-13	1982-12-16	Mobil Oil Corp	Rejuvenation of alkylation catalyst
CA1148569A (fr) *	1980-02-14	1983-06-21	Christine H. Kursewicz	Methodes de conversion des aromatiques
US4302620A (en) *	1980-10-29	1981-11-24	Mobil Oil Corporation	Reactions involving zeolite catalysts modified with group IV A metals
JPS57108023A (en) *	1980-12-26	1982-07-05	Toa Nenryo Kogyo Kk	Oligomerization catalyst for isobutene
US4334115A (en) *	1981-06-18	1982-06-08	Phillips Petroleum Company	Process for making tert-butyltoluenes
US4431746A (en) *	1981-06-26	1984-02-14	Mobil Oil Corporation	Preparing metal-exchanged highly siliceous porous crystalline materials
US4482644A (en) *	1983-04-18	1984-11-13	Exxon Research & Engineering Co.	Oxygen-deficient, barium-containing perovskites
US4711970A (en) *	1983-05-10	1987-12-08	Mobil Oil Corporation	Catalytic conversion
US4851604A (en) *	1987-09-02	1989-07-25	Mobil Oil Corp.	Toluene disproportionation
US4874731A (en) *	1987-10-13	1989-10-17	Uop	Catalyst for the isomerization of aromatics
US4929337A (en) *	1988-12-30	1990-05-29	Mobil Oil Corporation	Process for catalytic cracking of heavy hydrocarbon feed to lighter products
US4922051A (en) *	1989-03-20	1990-05-01	Mobil Oil Corp.	Process for the conversion of C2 -C12 paraffinic hydrocarbons to petrochemical feedstocks
US5030787A (en) *	1990-01-24	1991-07-09	Mobil Oil Corp.	Catalytic disproportionation/transalkylation utilizing a C9+ aromatics feed
US6323381B1 (en) *	1992-06-18	2001-11-27	Chevron Corporation	Manufacture of high purity benzene and para-rich xylenes by combining aromatization and selective disproportionation of impure toluene
CA2169963C (fr) *	1993-10-18	2005-07-05	Ernest W. Valyocsik	Materiau cristallin poreux synthetique, mcm-58, sa synthese et son utilisation
US5609751A (en) *	1994-07-26	1997-03-11	Chevron Chemical Company	Para-xylene selective reforming/aromatization
JPH10512604A (ja) *	1995-01-13	1998-12-02	アシュランドインコーポレーテッド	炭化水素変換触媒、添加剤およびプロセス
TW504501B (en) *	1995-02-10	2002-10-01	Mobil Oil Corp	Process for converting feedstock comprising C9+ aromatic hydrocarbons to lighter aromatic products
US5763714A (en) *	1997-01-08	1998-06-09	Catalytic Distillation Technologies	Process and apparatus for the production and recovery of p-xylene
US5942651A (en) *	1997-06-13	1999-08-24	Mobile Oil Corporation	Process for converting C9 + aromatic hydrocarbons to lighter aromatic products by transalkylation in the prescence of two zeolite-containing catalysts
US5866736A (en) *	1997-10-14	1999-02-02	Catalytic Distillation Technologies	Process for the production of alkyl benzene
US6004452A (en) *	1997-11-14	1999-12-21	Chevron Chemical Company Llc	Process for converting hydrocarbon feed to high purity benzene and high purity paraxylene
US6133470A (en) *	1998-07-28	2000-10-17	Mobil Oil Corporation	Integration of p-xylene production and subsequent conversion process
JP4823655B2 (ja) *	2005-11-21	2011-11-24	出光興産株式会社	キシレン類の製造方法
MY159574A (en) *	2007-10-31	2017-01-13	Exxonmobil Chemical Patents Inc	Heavy aromatics processing catalyst and process of using the same
US8062987B2 (en) *	2009-10-05	2011-11-22	Saudi Basic Industries Corporation	Phosphorus-containing zeolite catalysts and their method of preparation
US9278342B2 (en)	2012-07-02	2016-03-08	Saudi Basic Industries Corporation	Method of modifying a phosphorus-containing zeolite catalyst
CA3022086A1 (fr)	2016-04-25	2017-11-02	Exxonmobil Chemical Patents Inc.	Aromatisation catalytique
KR102524765B1 (ko)	2017-02-16	2023-04-25	엑손모빌 테크놀로지 앤드 엔지니어링 컴퍼니	경질 파라핀 전환을 위한 고정층 방사류 반응기

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3126422A (en) *		1964-03-24		Temperature
US2289916A (en) *	1939-04-21	1942-07-14	Universal Oil Prod Co	Treatment of hydrocarbons
NL288698A (fr) *	1962-02-07	1900-01-01
US3413374A (en) *	1966-05-04	1968-11-26	Toyo Rayon Co Ltd	Disproportionation of toluene
US3527825A (en) *	1968-07-03	1970-09-08	Universal Oil Prod Co	Transalkylation process
US3598879A (en) *	1968-12-19	1971-08-10	Ashland Oil Inc	Alkyl transfer of alkyl aromatics with group i-a,ii-a,iv,or rare earth metals on boria alumina
US3607961A (en) *	1968-12-19	1971-09-21	Ashland Oil Inc	Alkyl transfer of alkyl aromatics with group viii metals on boria-alumina
US3720724A (en) *	1970-06-03	1973-03-13	Phillips Petroleum Co	Dehydrogenation cyclohexane or mono- or polyalkylcyclohexanes
US3711422A (en) *	1970-09-08	1973-01-16	Phillips Petroleum Co	Cracking catalyst restoration with antimony compounds
US3760024A (en) *	1971-06-16	1973-09-18	Mobil Oil Corp	Preparation of aromatics
US3756942A (en) *	1972-05-17	1973-09-04	Mobil Oil Corp	Process for the production of aromatic compounds
US3899544A (en) *	1974-03-28	1975-08-12	Mobil Oil Corp	Conversion of alcohols and ethers to hydrocarbons
US3890218A (en) *	1974-03-29	1975-06-17	Mobil Oil Corp	Upgrading aliphatic naphthas to higher octane gasoline
US3965208A (en) *	1975-01-06	1976-06-22	Mobil Oil Corporation	Methylation of toluene
US4025458A (en) *	1975-02-18	1977-05-24	Phillips Petroleum Company	Passivating metals on cracking catalysts
US3979472A (en) *	1975-03-28	1976-09-07	Mobil Oil Corporation	Process for manufacturing hydrocarbons

1975
- 1975-11-24 US US05/634,992 patent/US4007231A/en not_active Expired - Lifetime
1976
- 1976-07-19 NL NLAANVRAGE7608001,A patent/NL182056C/xx not_active IP Right Cessation
- 1976-07-20 FR FR7622096A patent/FR2332057A1/fr active Granted
- 1976-07-20 CA CA257,405A patent/CA1077455A/fr not_active Expired
- 1976-07-21 CS CS764836A patent/CS211352B2/cs unknown
- 1976-07-22 BE BE169155A patent/BE844417A/fr not_active IP Right Cessation
- 1976-07-26 IT IT25706/76A patent/IT1064729B/it active
- 1976-07-28 DE DE19762633881 patent/DE2633881A1/de not_active Withdrawn
- 1976-07-28 JP JP51089269A patent/JPS5265229A/ja active Pending
- 1976-08-13 PL PL1976191799A patent/PL118516B1/pl unknown
- 1976-08-18 RO RO7687324A patent/RO71011A/fr unknown
- 1976-08-31 US US05/719,298 patent/US4080395A/en not_active Expired - Lifetime
- 1976-08-31 US US05/719,297 patent/US4080396A/en not_active Expired - Lifetime
- 1976-08-31 US US05/719,296 patent/US4067919A/en not_active Expired - Lifetime
- 1976-11-22 DD DD7600195891A patent/DD131728A5/xx unknown

Also Published As

Publication number	Publication date
CS211352B2 (en)	1982-02-26
FR2332057B1 (fr)	1980-04-25
US4080395A (en)	1978-03-21
NL182056B (nl)	1987-08-03
DE2633881A1 (de)	1977-06-02
RO71011A (fr)	1982-07-06
JPS5265229A (en)	1977-05-30
NL182056C (nl)	1988-01-04
DD131728A5 (de)	1978-07-19
FR2332057A1 (fr)	1977-06-17
CA1077455A (fr)	1980-05-13
US4067919A (en)	1978-01-10
US4007231A (en)	1977-02-08
PL118516B1 (en)	1981-10-31
IT1064729B (it)	1985-02-25
US4080396A (en)	1978-03-21
NL7608001A (nl)	1977-05-26

Publication	Publication Date	Title
BE844417A (fr)	1977-01-24	Composition catalytique pour la conversion de composes organiques
IT1007059B (it)	1976-10-30	Procedimento per la conversione di idrocarburi
JPS57176918A (en)	1982-10-30	Conversion of organic compounds
IT1121673B (it)	1986-04-10	Procedimento per la produzione di composti silicio organici solforati
BG26959A3 (bg)	1979-07-12	Състав за определяне на холестерол
IT7946846A0 (it)	1979-05-25	Procedimento per la produzione dimateriali composti
SE7908625L (sv)	1979-10-17	Acetylglykosylmykofenolsyraforeningar for framstellning av glykosylmykofenolsyraforeningar
BE829809A (fr)	1975-12-03	Fluoration de composes organiques satures
BE860140A (fr)	1978-02-15	Catalyseurs pour la production de polyurethannes
OA05096A (fr)	1981-01-31	Procédé de préparation de composés hétérocycliques.
IT1022322B (it)	1978-03-20	Composizione catalitica per la conversione di idrocarburi
FR2351137A1 (fr)	1977-12-09	Composes catalytiques pour la production de polyurethannes et composition de polyurethannes obtenues
IT1015555B (it)	1977-05-20	Procedimento per la conversione di idrocarburi
MX3621E (es)	1981-04-02	Composicion catalitica mejorada para la conversion de hidrocarburos
DK129779A (da)	1979-10-04	Fremgangsmaade til omdannelse af penicillinsulfoxidestere
BE827075A (fr)	1975-09-24	Compose polysiloxaniques porteurs de groupes hydroxy, utilisables pour la preparation de resines organiques
RO70082A (fr)	1981-06-30	Procede pour preparer carbamide
BE857634A (fr)	1977-12-01	Compositions catalytiques pour la production de polyurethanes
AR225129A1 (es)	1982-02-26	Composicion catalitica para la conversion de hidrocarburos
AR206610A1 (es)	1976-08-06	Procedimiento de preparacion de 2-metoxi-5-sulfonil(sustituidos)-benzamidas-(-sustituidas
IT1022223B (it)	1978-03-20	Catalizzatore per la preparazione di etilenossido
CA1015159A (fr)	1977-08-09	Revetement interieur pour la tubulure des convertisseurs
OA06355A (fr)	1981-06-30	Procédé de préparation de 3-exométhylènecépham-sulfoxydes.
MX4084E (es)	1981-12-04	Proceso mejorado para la conversion catalitica de hidrocarburos pesados
OA05390A (fr)	1981-02-28	Procédé pour la préparation de composition anthelmintique.

Legal Events

Date	Code	Title	Description
1990-01-31	RE	Patent lapsed	Owner name: MOBIL OIL CORP. Effective date: 19890731

Date

Code

Title

Description

1990-01-31

Patent lapsed

Owner name: MOBIL OIL CORP.

Effective date: 19890731