BR8404694A - Processo melhorado para conversao de etileno em buteno-1 - Google Patents
Processo melhorado para conversao de etileno em buteno-1Info
- Publication number
- BR8404694A BR8404694A BR8404694A BR8404694A BR8404694A BR 8404694 A BR8404694 A BR 8404694A BR 8404694 A BR8404694 A BR 8404694A BR 8404694 A BR8404694 A BR 8404694A BR 8404694 A BR8404694 A BR 8404694A
- Authority
- BR
- Brazil
- Prior art keywords
- butene
- ethylene
- conversion
- improved process
- improved
- Prior art date
Links
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 title 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title 1
- 239000005977 Ethylene Substances 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
Classifications
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
- B01J31/2208—Oxygen, e.g. acetylacetonates
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0201—Oxygen-containing compounds
- B01J31/0211—Oxygen-containing compounds with a metal-oxygen link
- B01J31/0212—Alkoxylates
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/12—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
- B01J31/14—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides of aluminium or boron
- B01J31/143—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides of aluminium or boron of aluminium
-
- 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
- C07C2/02—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons
- C07C2/04—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation
- C07C2/06—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation of alkenes, i.e. acyclic hydrocarbons having only one carbon-to-carbon double bond
- C07C2/08—Catalytic processes
- C07C2/26—Catalytic processes with hydrides or organic compounds
- C07C2/30—Catalytic processes with hydrides or organic compounds containing metal-to-carbon bond; Metal hydrides
-
- 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
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/40—Complexes comprising metals of Group IV (IVA or IVB) as the central metal
- B01J2531/46—Titanium
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2531/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- C07C2531/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2531/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- C07C2531/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- C07C2531/12—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2531/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- C07C2531/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- C07C2531/12—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
- C07C2531/14—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides of aluminium or boron
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Cephalosporin Compounds (AREA)
- Control Of Electric Motors In General (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8315040A FR2552079B1 (fr) | 1983-09-20 | 1983-09-20 | Procede ameliore de synthese du butene-1 par dimerisation de l'ethylene |
| FR8315041A FR2552080B1 (fr) | 1983-09-20 | 1983-09-20 | Procede ameliore de synthese du butene-1 par dimerisation de l'ethylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR8404694A true BR8404694A (pt) | 1985-08-13 |
Family
ID=26223592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR8404694A BR8404694A (pt) | 1983-09-20 | 1984-09-19 | Processo melhorado para conversao de etileno em buteno-1 |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US4532370A (pt) |
| EP (1) | EP0135441B1 (pt) |
| AU (1) | AU572191B2 (pt) |
| BR (1) | BR8404694A (pt) |
| CA (1) | CA1234383A (pt) |
| DE (1) | DE3461173D1 (pt) |
| NO (1) | NO158575C (pt) |
| NZ (1) | NZ209604A (pt) |
Families Citing this family (57)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2565591B1 (fr) * | 1984-06-08 | 1986-08-29 | Inst Francais Du Petrole | Procede de fabrication d'un copolymere ethylene-butene-1 a partir d'ethylene |
| EP0221206B1 (en) * | 1985-09-27 | 1990-11-28 | Indian Petrochemicals Corporation Ltd. | Process for making butene-1 from ethylene |
| SU1662996A1 (ru) * | 1987-07-13 | 1991-07-15 | Отделение Института химической физики АН СССР | Способ получени бутена-1 |
| WO1989008091A1 (fr) * | 1988-02-23 | 1989-09-08 | Institut Khimicheskoi Fiziki Akademii Nauk Sssr | Procede d'obtention du butane-i et/ou des hexenes |
| US5463157A (en) * | 1993-10-29 | 1995-10-31 | Exxon Chemical Patents, Inc. | Process for preparing 3-methyl-2-pentene |
| FR2733497B1 (fr) * | 1995-04-28 | 1997-06-06 | Inst Francais Du Petrole | Procede de production de butene-1 par dimerisation de l'ethylene comportant une zone de recuperation amelioree de catalyseur use |
| JPH09143228A (ja) * | 1995-11-22 | 1997-06-03 | Sumitomo Chem Co Ltd | エチレン−α−オレフィン共重合体の製造方法 |
| FR2748019B1 (fr) * | 1996-04-26 | 1998-06-26 | Inst Francais Du Petrole | Procede ameliore de conversion de l'ethylene en butene-1 avec utlisation d'additifs a base de sels d'ammonium quaternaire |
| FR2748020B1 (fr) * | 1996-04-26 | 1998-06-26 | Inst Francais Du Petrole | Procede ameliore de conversion de l'ethylene en butene-1 avec utilisation d'additifs a base de polyethyleneglycols et de leurs derives |
| CN1077577C (zh) * | 1997-10-31 | 2002-01-09 | 中国石油化工总公司 | 乙烯二聚催化剂及由其与乙烯聚合催化剂组成的催化剂体系 |
| FR2879189B1 (fr) * | 2004-12-13 | 2007-03-30 | Inst Francais Du Petrole | Methode pour transporter des hydrates en suspension dans des effluents de production utilisant un additif non-polluant |
| FR2880018B1 (fr) * | 2004-12-27 | 2007-02-23 | Inst Francais Du Petrole | Production de propylene mettant en oeuvre la dimerisation de l'ethylene en butene-1, l'hydro-isomerisation en butene-2 et la metathese par l'ethylene |
| RU2304147C2 (ru) * | 2005-04-13 | 2007-08-10 | Институт Проблем Химической Физики Российской Академии Наук (Ипхф Ран) | Каталитическая система для димеризации этилена и способ димеризации этилена в 1-бутен |
| RU2006127130A (ru) * | 2006-07-27 | 2008-02-10 | Некоммерческа организаци Учреждение Институт проблем химической физики Российской академии наук (статус государственного учреждени (ИПХФ РАН) (RU) | Реакторный узел для ди- и/или олигомеризации этилена и других олефинов |
| EP2196444A1 (en) | 2008-12-11 | 2010-06-16 | Total Petrochemicals Research Feluy | Process to make alpha olefins from ethanol |
| FR2960234B1 (fr) * | 2010-05-18 | 2013-11-01 | Inst Francais Du Petrole | Procede de dimerisation de l'ethylene en butene-1 utilisant une composition comprenant un complexe a base de titane et un ligand alcoxy fonctionnalise par un hetero-atome. |
| FR2984311B1 (fr) | 2011-12-20 | 2015-01-30 | IFP Energies Nouvelles | Procede de production d'octenes mettant en oeuvre la dimerisation de l'ethylene en butenes et la dimerisation des butenes en octenes |
| JP5996099B2 (ja) | 2012-05-11 | 2016-09-21 | サウジ アラビアン オイル カンパニー | エチレンのオリゴマー化プロセス |
| DE102012215757A1 (de) | 2012-09-05 | 2014-03-06 | Evonik Industries Ag | Verfahren zur Herstellung von linearen Butenen aus Methanol |
| FR2995893B1 (fr) * | 2012-09-21 | 2014-09-05 | Axens | Procede de production de butadiene-1,3 mettant en oeuvre la dimerisation de l'ethylene et la deshydrogenation des butenes obtenus |
| FR2999957B1 (fr) | 2012-12-21 | 2015-02-27 | Lab Sa | Procede de fabrication d'un catalyseur de denitrification, ainsi que catalyseur de denitrification correspondant et procede de denitrification utilisant un tel catalyseur |
| CN105814097B (zh) * | 2013-12-13 | 2018-02-02 | 沙特基础工业公司 | 用于乙烯的选择性二聚和聚合的催化剂组合物 |
| RU2647726C2 (ru) * | 2014-01-06 | 2018-03-19 | Сауди Бейсик Индастриз Корпорейшн | Каталитические композиции для димеризации этилена |
| WO2015118462A1 (en) * | 2014-02-06 | 2015-08-13 | Sabic Global Technologies B.V. | Modifying organoaluminum co-catalysts for improved performance |
| EP3129410A2 (en) * | 2014-04-07 | 2017-02-15 | Saudi Basic Industries Corporation | Freeze-drying of organoaluminum co-catalyst compositions and transition metal complex catalyst compositions |
| EP2942102A1 (fr) | 2014-05-05 | 2015-11-11 | Lab Sa | Procédé de fabrication d'un catalyseur de dénitrification, ainsi que catalyseur de dénitrification correspondant et procédé de dénitrification utilisant un tel catalyseur |
| FR3023183A1 (fr) * | 2014-07-04 | 2016-01-08 | IFP Energies Nouvelles | Composition catalytique et procede de dimerisation selective de l'ethylene en butene-1 |
| EP4582181A1 (en) | 2015-06-19 | 2025-07-09 | Saudi Arabian Oil Company | Antifouling oligomerization catalyst systems |
| US11104621B2 (en) | 2016-01-07 | 2021-08-31 | Saudi Arabian Oil Company | Antifouling oligomerization catalyst systems |
| US10093873B2 (en) | 2016-09-06 | 2018-10-09 | Saudi Arabian Oil Company | Process to recover gasoline and diesel from aromatic complex bottoms |
| US10280125B2 (en) | 2016-12-07 | 2019-05-07 | Sumitomo Chemical Company, Limited | Process for selective ethylene oligomerization with antifouling components |
| FR3061034B1 (fr) | 2016-12-22 | 2019-05-31 | IFP Energies Nouvelles | Procede d'oligomerisation d'olefines mettant en œuvre un dispositif de nettoyage |
| US10053401B1 (en) | 2017-02-16 | 2018-08-21 | Saudi Arabian Oil Company | Process for recovery of light alkyl mono-aromatic compounds from heavy alkyl aromatic and alkyl-bridged non-condensed alkyl aromatic compounds |
| US11279663B2 (en) | 2017-02-16 | 2022-03-22 | Saudi Arabian Oil Company | Methods and systems of upgrading heavy aromatics stream to petrochemical feedstock |
| US11066344B2 (en) | 2017-02-16 | 2021-07-20 | Saudi Arabian Oil Company | Methods and systems of upgrading heavy aromatics stream to petrochemical feedstock |
| US10508066B2 (en) | 2017-02-16 | 2019-12-17 | Saudi Arabian Oil Company | Methods and systems of upgrading heavy aromatics stream to petrochemical feedstock |
| US10407358B2 (en) | 2017-03-14 | 2019-09-10 | Saudi Arabian Oil Company | Process for ethylene oligomerization to produce alpha-olefins |
| SG11202002440RA (en) | 2017-09-22 | 2020-04-29 | Saudi Arabian Oil Co | Inline process to make antifouling agent co-catalyst for ethylene oligomerization |
| FR3074493B1 (fr) * | 2017-12-05 | 2019-12-13 | IFP Energies Nouvelles | Procede de dimerisation de l'ethylene comprenant une etape de traitement de l'effluent reactionnel |
| FR3083235B1 (fr) | 2018-06-29 | 2021-12-03 | Ifp Energies Now | Procede d'oligomerisation en cascade de reacteurs gaz liquide agites avec injection etagee d'ethylene |
| WO2020242921A1 (en) | 2019-05-24 | 2020-12-03 | Eastman Chemical Company | Recycle content cellulose ester |
| WO2021092306A1 (en) * | 2019-11-07 | 2021-05-14 | Eastman Chemical Company | Recycle content alpha olefins and fatty alcohols |
| FR3105018B1 (fr) | 2019-12-18 | 2021-12-10 | Ifp Energies Now | Reacteur gaz/liquide d’oligomerisation comprenant des internes transversaux |
| FR3108264B1 (fr) | 2020-03-19 | 2022-04-08 | Ifp Energies Now | Installation d’oligomérisation d’éthylène pour produire des alpha-oléfines |
| US11440980B2 (en) | 2020-07-22 | 2022-09-13 | Saudi Arabian Oil Company | Methods for forming ultra high molecular weight polyethylenes and methods for reducing contaminant content in such |
| US11623208B2 (en) | 2020-11-30 | 2023-04-11 | Saudi Arabian Oil Company | Catalyst systems |
| WO2022115748A1 (en) | 2020-11-30 | 2022-06-02 | Saudi Arabian Oil Company | Catalyst systems |
| US11458463B2 (en) | 2020-11-30 | 2022-10-04 | Saudi Arabian Oil Company | Catalyst systems |
| US11440857B2 (en) | 2020-11-30 | 2022-09-13 | Saudi Arabian Oil Company | Catalyst systems |
| US11458462B2 (en) | 2020-11-30 | 2022-10-04 | Saudi Arabian Oil Company | Catalyst systems |
| FR3117890B1 (fr) | 2020-12-23 | 2024-01-12 | Ifp Energies Now | Reacteur gaz/liquide d’oligomerisation comprenant un double distributeur gaz/liquide |
| US11613714B2 (en) | 2021-01-13 | 2023-03-28 | Saudi Arabian Oil Company | Conversion of aromatic complex bottoms to useful products in an integrated refinery process |
| US11529622B2 (en) | 2021-03-12 | 2022-12-20 | Saudi Arabian Oil Company | Catalyst systems |
| FR3121439B1 (fr) | 2021-03-30 | 2023-03-24 | Ifp Energies Now | Procede d'oligomerisation comprenant une etape de recyclage d'un solvant prealablement refroidi |
| WO2023027749A1 (en) | 2021-08-26 | 2023-03-02 | Saudi Arabian Oil Company | Catalyst systems |
| US11623901B1 (en) | 2022-08-31 | 2023-04-11 | Saudi Arabian Oil Company | Catalyst systems that include silyl ether moieties |
| US11639321B1 (en) | 2022-08-31 | 2023-05-02 | Saudi Arabian Oil Company | Catalyst systems that include meta-alkoxy substituted n-aryl bis-diphosphinoamine ligands |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB856288A (en) * | 1958-09-04 | 1960-12-14 | Du Pont Canada | Preparation of olefins |
| GB1235631A (en) * | 1969-05-19 | 1971-06-16 | Bp Chem Int Ltd | Oligomerisation of ethylene |
| SU485101A1 (ru) * | 1970-11-25 | 1975-09-25 | Филиал Ордена Ленина Института Химической Физики Ан Ссср | Способ получени -бутилена |
| US3969429A (en) * | 1974-08-05 | 1976-07-13 | Gennady Petrovich Belov | Method of producing butene-1 |
| SU681034A1 (ru) * | 1975-02-27 | 1979-08-25 | Отделение ордена Ленина института химической физики АН СССР | Способ получени -олефинов |
| SU681032A1 (ru) * | 1976-02-23 | 1979-08-25 | Грозненский филиал Охтинского научно-производственного объединения "Пластполимер" | Способ получени димеров и содимеров -олефинов |
| US4312783A (en) * | 1979-07-24 | 1982-01-26 | Asahi Kasei Kogyo Kabushiki Kaisha | Catalyst for polymerization of olefins |
| US4370456A (en) * | 1981-11-23 | 1983-01-25 | Union Carbide Corporation | Catalyst composition for copolymerizing ethylene |
| AU9104182A (en) * | 1982-12-01 | 1984-06-07 | Dow Chemical Company, The | Linear alpha olefin production |
| DE3301162A1 (de) * | 1983-01-15 | 1984-07-19 | EC Erdölchemie GmbH, 5000 Köln | Verfahren zur herstellung von buten-1 |
-
1984
- 1984-09-11 DE DE8484401784T patent/DE3461173D1/de not_active Expired
- 1984-09-11 EP EP84401784A patent/EP0135441B1/fr not_active Expired
- 1984-09-18 NO NO843713A patent/NO158575C/no not_active IP Right Cessation
- 1984-09-19 NZ NZ209604A patent/NZ209604A/en unknown
- 1984-09-19 AU AU33288/84A patent/AU572191B2/en not_active Ceased
- 1984-09-19 BR BR8404694A patent/BR8404694A/pt not_active IP Right Cessation
- 1984-09-20 CA CA000463662A patent/CA1234383A/fr not_active Expired
- 1984-09-20 US US06/652,555 patent/US4532370A/en not_active Expired - Lifetime
-
1985
- 1985-04-30 US US06/728,901 patent/US4615998A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NO843713L (no) | 1985-03-21 |
| CA1234383A (fr) | 1988-03-22 |
| AU3328884A (en) | 1985-03-28 |
| NZ209604A (en) | 1987-04-30 |
| AU572191B2 (en) | 1988-05-05 |
| NO158575C (no) | 1988-10-05 |
| US4615998A (en) | 1986-10-07 |
| DE3461173D1 (en) | 1986-12-11 |
| EP0135441B1 (fr) | 1986-11-05 |
| NO158575B (no) | 1988-06-27 |
| EP0135441A1 (fr) | 1985-03-27 |
| US4532370A (en) | 1985-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| BR8404694A (pt) | Processo melhorado para conversao de etileno em buteno-1 | |
| BR8403666A (pt) | Processo para produzir buteno-1 de alta pureza | |
| BR8403842A (pt) | Processo para preparar etileno-glicois | |
| BR8503105A (pt) | Processo para a oxidesidrogenacao de etano ate etileno | |
| BR8503080A (pt) | Processo de oxidesidrogenacao de etano a etileno | |
| BR8507076A (pt) | Processo de preparacao de um copolimero de etileno | |
| BR8707359A (pt) | Processo de oligomerizacao de olefinas | |
| BR8202499A (pt) | Processo para melhorar o poder intumescente de tacabos | |
| BR8200530A (pt) | Processo para produzir um polimero de etileno | |
| BR8504263A (pt) | Processo para preparar borracha pulverizada | |
| BR8201135A (pt) | Processo para produzir copolimero em blocos de propileno etileno | |
| IT1195264B (it) | Processo per preparare catalizzatori per la conversione di idrocarburi | |
| BR8205716A (pt) | Processo para a conversao de terfenos em cimenos | |
| ES545175A0 (es) | Procedimiento de producir compuestos para tratar la hiper- tension | |
| BR8406650A (pt) | Processo para oxicloracao de etileno | |
| BR8406581A (pt) | Processo para sintetizacao de silicofosfoaluminato cristalino | |
| BR8504512A (pt) | Processo para preparar catalisador para sintese de 1,2-dicloroetano | |
| BR8302433A (pt) | Processo para produzir eteres alqui-ter-butilicos | |
| BR8204470A (pt) | Processo para preparar um polimero de etileno | |
| BR8401875A (pt) | Processo para preparacao de isoxazolil imidazolidinonas | |
| BR8503360A (pt) | Processo para recuperar catalisador | |
| BR8204253A (pt) | Processo para produzir etileno glicol | |
| IT1102409B (it) | Processo per la purificazione di olefine | |
| BR8306216A (pt) | Processo para produzir para-nitrodifenilaminas | |
| BR8705619A (pt) | Processo para inibir microorganismos |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B21A | Patent or certificate of addition expired [chapter 21.1 patent gazette] |
Free format text: PATENTE EXTINTA EM 19/09/99 |