BG29274A3 - Method of obtaining of catalyst for olefines copolymerisation - Google Patents
Method of obtaining of catalyst for olefines copolymerisationInfo
- Publication number
- BG29274A3 BG29274A3 BG033991A BG3399176A BG29274A3 BG 29274 A3 BG29274 A3 BG 29274A3 BG 033991 A BG033991 A BG 033991A BG 3399176 A BG3399176 A BG 3399176A BG 29274 A3 BG29274 A3 BG 29274A3
- Authority
- BG
- Bulgaria
- Prior art keywords
- catalyst
- hydrogel
- titanium
- copolymerisation
- olefines
- Prior art date
Links
- 239000003054 catalyst Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 239000000017 hydrogel Substances 0.000 abstract 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 2
- 229910052719 titanium Inorganic materials 0.000 abstract 2
- 239000010936 titanium Substances 0.000 abstract 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 150000001336 alkenes Chemical class 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 239000011651 chromium Substances 0.000 abstract 1
- 229940117975 chromium trioxide Drugs 0.000 abstract 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 abstract 1
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 abstract 1
- 238000007334 copolymerization reaction Methods 0.000 abstract 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 150000003609 titanium compounds Chemical class 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/26—Chromium
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/02—Ethene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Polymerization Catalysts (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Catalysts (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/607,977 US4053436A (en) | 1975-08-26 | 1975-08-26 | Spray dried titanium-containing catalyst for stress crack resistant polymer |
Publications (1)
Publication Number | Publication Date |
---|---|
BG29274A3 true BG29274A3 (en) | 1980-10-15 |
Family
ID=24434505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BG033991A BG29274A3 (en) | 1975-08-26 | 1976-08-13 | Method of obtaining of catalyst for olefines copolymerisation |
Country Status (13)
Country | Link |
---|---|
US (2) | US4053436A (no) |
JP (1) | JPS5227083A (no) |
BE (1) | BE845535A (no) |
BG (1) | BG29274A3 (no) |
CA (1) | CA1074289A (no) |
ES (1) | ES450151A1 (no) |
FI (1) | FI60716C (no) |
IN (1) | IN144959B (no) |
NO (1) | NO146139C (no) |
PT (1) | PT65270B (no) |
RO (1) | RO69971A (no) |
TR (1) | TR19689A (no) |
YU (1) | YU39770B (no) |
Families Citing this family (69)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4186260A (en) * | 1973-05-24 | 1980-01-29 | Phillips Petroleum Company | Olefin polymerization process |
US4151122A (en) * | 1977-12-05 | 1979-04-24 | Phillips Petroleum Company | Reduction and reoxidation of cogel or self-reduced catalyst |
US4182815A (en) * | 1977-12-05 | 1980-01-08 | Phillips Petroleum Company | Reduction and reoxidation of cogel or self-reduced catalyst |
US4293673A (en) * | 1978-12-28 | 1981-10-06 | Union Carbide Corporation | Spheroidal polymerization catalyst, process for preparing, and use for ethylene polymerization |
US4376062A (en) * | 1979-11-28 | 1983-03-08 | Union Carbide Corporation | Spheroidal polymerization catalyst, process for preparing, and use for ethylene polymerization |
US4368303A (en) * | 1980-02-06 | 1983-01-11 | Phillips Petroleum Company | Titanium impregnated silica-chromium catalysts |
US4294724A (en) * | 1980-02-06 | 1981-10-13 | Phillips Petroleum Company | Titanium impregnated silica-chromium catalysts |
US4331789A (en) * | 1980-03-14 | 1982-05-25 | Phillips Petroleum Company | Polymerization using a selenium or tellurium treated catalyst |
US4295998A (en) * | 1980-03-14 | 1981-10-20 | Phillips Petroleum Company | Selenium or tellurium treated silica |
US4279780A (en) * | 1980-04-18 | 1981-07-21 | Chemplex Company | Method of preparing catalyst supports |
US4402864A (en) * | 1981-08-14 | 1983-09-06 | Phillips Petroleum Company | Catalyst support treated with titanium polymer |
US4405768A (en) * | 1981-08-14 | 1983-09-20 | Phillips Petroleum Company | Polymerization process using chromium on a support treated with titanium polymer |
US4424320A (en) | 1981-11-25 | 1984-01-03 | Phillips Petroleum Company | Polymerization with a silica base catalyst having titanium incorporated through use of peroxide |
US4442275A (en) * | 1982-03-09 | 1984-04-10 | Phillips Petroleum Company | Polymerization process using catalyst having aqueous titanation of support with solubilized Ti(OR)4 |
US4522987A (en) * | 1982-07-09 | 1985-06-11 | Phillips Petroleum Company | Low density polyethylene |
US4477492A (en) * | 1983-04-22 | 1984-10-16 | E. I. Du Pont De Nemours And Company | Process for preparing superficially porous supports for chromatography and catalysts |
US4791089A (en) * | 1983-10-07 | 1988-12-13 | Enron Chemical Corporation | Zirconia-titania-silica tergels and their use as catalyst supports |
US5155186A (en) * | 1984-12-24 | 1992-10-13 | Phillips Petroleum Company | Ethylene homopolymer and copolymer polymerization process and the products produced therefrom |
US5115053A (en) * | 1988-07-25 | 1992-05-19 | Phillips Petroleum Company | Twice-aged porous inorganic oxides, catalysts, and polymerization processes |
US4981831A (en) * | 1988-07-25 | 1991-01-01 | Phillips Petroleum Company | Twice-aged porous inorganic oxides, catalysts, and polymerization processes |
US5451645A (en) * | 1989-08-10 | 1995-09-19 | Phillips Petroleum Company | Process for olefin polymerization |
US4988657A (en) * | 1989-10-06 | 1991-01-29 | Phillips Petroleum Company | Process for olefin polymerization |
US5171801A (en) * | 1989-10-06 | 1992-12-15 | Phillips Petroleum Company | Process for olefin polymerization |
US5071927A (en) * | 1990-10-09 | 1991-12-10 | Phillips Petroleum Company | High-temperature slurry polymerization of ethylene |
DE69217878T2 (de) * | 1991-12-18 | 1997-06-12 | Phillips Petroleum Co | Verfahren zur Herstellung von Polymerisationskatalysator |
BE1005718A3 (fr) * | 1992-03-10 | 1993-12-28 | Solvay | Procede pour la fabrication d'une poudre microspheroidale a faible dispersite, poudre microspheroidale a faible dispersite ainsi obtenue, catalyseurs pour la polymerisation d'alpha-olefines et procede de polymerisation d'alpha-olefines. |
GB9210265D0 (en) * | 1992-05-13 | 1992-07-01 | Unilever Plc | Catalysts and catalyst supports |
US5378764A (en) * | 1992-10-08 | 1995-01-03 | Phillips Petroleum Company | Polyethylene blends |
US5344884A (en) * | 1992-10-08 | 1994-09-06 | Phillips Petroleum Company | Polyethylene blends |
US5508362A (en) † | 1993-10-08 | 1996-04-16 | Phillips Petroleum Company | Chromium catalyst compositions and polymerization processes therewith |
CA2146034A1 (en) | 1994-05-12 | 1995-11-13 | Kenneth W. Willcox | Polymer stabilization |
US6465586B2 (en) | 1999-11-12 | 2002-10-15 | Mcdaniel Max P. | Polymerization catalyst and process |
JP2002241424A (ja) * | 2001-02-21 | 2002-08-28 | Japan Polychem Corp | エチレン系重合体の製造方法 |
US7307133B2 (en) * | 2004-04-22 | 2007-12-11 | Chevron Phillips Chemical Company Lp | Polymers having broad molecular weight distributions and methods of making the same |
US6977235B2 (en) * | 2004-04-22 | 2005-12-20 | Chevron Phillips Chemical Company, Lp | Catalyst systems comprising a calcined chromium catalyst and a non-transition metal cyclopentadienyl cocatalyst |
CA2708417C (en) | 2004-04-22 | 2014-01-21 | Max P. Mcdaniel | Polymers having broad molecular weight distribution and methods of making the same |
DE102005060770A1 (de) * | 2005-12-16 | 2007-06-21 | Basell Polyolefine Gmbh | Verfahren zur Herstellung eines Trägers für Olefinpolymerisationskatalysatoren |
US8440772B2 (en) | 2011-04-28 | 2013-05-14 | Chevron Phillips Chemical Company Lp | Methods for terminating olefin polymerizations |
US8487053B2 (en) | 2011-11-30 | 2013-07-16 | Chevron Phillips Chemical Company Lp | Methods for removing polymer skins from reactor walls |
US9023967B2 (en) | 2011-11-30 | 2015-05-05 | Chevron Phillips Chemical Company Lp | Long chain branched polymers and methods of making same |
EP3919526A1 (en) * | 2011-12-19 | 2021-12-08 | Dow Global Technologies Llc | A polyethylene composition and articles made therefrom |
US8501882B2 (en) | 2011-12-19 | 2013-08-06 | Chevron Phillips Chemical Company Lp | Use of hydrogen and an organozinc compound for polymerization and polymer property control |
US8703883B2 (en) | 2012-02-20 | 2014-04-22 | Chevron Phillips Chemical Company Lp | Systems and methods for real-time catalyst particle size control in a polymerization reactor |
US10273315B2 (en) | 2012-06-20 | 2019-04-30 | Chevron Phillips Chemical Company Lp | Methods for terminating olefin polymerizations |
US8916494B2 (en) | 2012-08-27 | 2014-12-23 | Chevron Phillips Chemical Company Lp | Vapor phase preparation of fluorided solid oxides |
US8940842B2 (en) | 2012-09-24 | 2015-01-27 | Chevron Phillips Chemical Company Lp | Methods for controlling dual catalyst olefin polymerizations |
US9068027B2 (en) * | 2013-03-13 | 2015-06-30 | Chevron Phillips Chemical Company Lp | Methods of preparing a polymerization catalyst |
US10577440B2 (en) | 2013-03-13 | 2020-03-03 | Chevron Phillips Chemical Company Lp | Radically coupled resins and methods of making and using same |
US10654948B2 (en) | 2013-03-13 | 2020-05-19 | Chevron Phillips Chemical Company Lp | Radically coupled resins and methods of making and using same |
US9708426B2 (en) | 2015-06-01 | 2017-07-18 | Chevron Phillips Chemical Company Lp | Liquid-solid sampling system for a loop slurry reactor |
US10213766B2 (en) | 2015-09-18 | 2019-02-26 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst |
WO2017078974A1 (en) | 2015-11-05 | 2017-05-11 | Chevron Phillips Chemical Company Lp | Radically coupled resins and methods of making and using same |
US10005861B2 (en) | 2016-06-09 | 2018-06-26 | Chevron Phillips Chemical Company Lp | Methods for increasing polymer production rates with halogenated hydrocarbon compounds |
US9988468B2 (en) | 2016-09-30 | 2018-06-05 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst |
US10654953B2 (en) * | 2016-12-29 | 2020-05-19 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst |
US20200369803A1 (en) | 2016-12-29 | 2020-11-26 | Chevron Phillips Chemical Company Lp | Methods of Preparing a Catalyst |
US11267914B2 (en) | 2016-12-29 | 2022-03-08 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst |
US10550252B2 (en) | 2017-04-20 | 2020-02-04 | Chevron Phillips Chemical Company Lp | Bimodal PE resins with improved melt strength |
US10287369B2 (en) | 2017-04-24 | 2019-05-14 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst |
US10323109B2 (en) | 2017-11-17 | 2019-06-18 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst utilizing hydrated reagents |
US10513570B2 (en) | 2017-11-17 | 2019-12-24 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst |
US11266976B2 (en) | 2018-04-16 | 2022-03-08 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst with low HRVOC emissions |
US10722874B2 (en) | 2018-04-16 | 2020-07-28 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst utilizing hydrated reagents |
US10543480B2 (en) | 2018-04-16 | 2020-01-28 | Chevron Phillips Chemical Company Lp | Methods of preparing a catalyst utilizing hydrated reagents |
US10774161B2 (en) | 2019-01-31 | 2020-09-15 | Chevron Phillips Chemical Company Lp | Systems and methods for polyethylene recovery with low volatile content |
US11674023B2 (en) | 2020-10-15 | 2023-06-13 | Chevron Phillips Chemical Company Lp | Polymer composition and methods of making and using same |
US12077616B2 (en) | 2021-12-15 | 2024-09-03 | Chevron Phillips Chemical Company Lp | Production of polyethylene and ethylene oligomers from ethanol and the use of biomass and waste streams as feedstocks to produce the ethanol |
US11845814B2 (en) | 2022-02-01 | 2023-12-19 | Chevron Phillips Chemical Company Lp | Ethylene polymerization processes and reactor systems for the production of multimodal polymers using combinations of a loop reactor and a fluidized bed reactor |
US20230331875A1 (en) | 2022-04-19 | 2023-10-19 | Chevron Phillips Chemical Company Lp | Loop slurry periodogram control to prevent reactor fouling and reactor shutdowns |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL135121C (no) * | 1964-05-22 | 1972-09-16 | ||
US3378540A (en) * | 1964-05-25 | 1968-04-16 | Phillips Petroleum Co | Polymerization of 1-olefins and catalyst |
US3887494A (en) * | 1970-11-12 | 1975-06-03 | Phillips Petroleum Co | Olefin polymerization catalyst |
BE793717A (fr) * | 1972-01-07 | 1973-07-05 | Phillips Petroleum Co | Catalyseurs a base de gels de silices a grands pores |
US3867306A (en) * | 1972-03-24 | 1975-02-18 | Phillips Petroleum Co | Olefin polymerization composition |
US3890249A (en) * | 1972-11-29 | 1975-06-17 | Phillips Petroleum Co | Silica preparation |
US3951863A (en) * | 1974-02-25 | 1976-04-20 | Phillips Petroleum Company | Silica xerogel production |
US3976632A (en) * | 1974-12-04 | 1976-08-24 | Phillips Petroleum Company | Reactivation of organochromium olefin polymerization catalyst in presence of oxygen |
US4001196A (en) * | 1974-12-04 | 1977-01-04 | Phillips Petroleum Company | Reactivation of organochromium olefin polymerization catalyst in presence of oxygen |
-
1975
- 1975-08-26 US US05/607,977 patent/US4053436A/en not_active Expired - Lifetime
-
1976
- 1976-02-10 CA CA245,392A patent/CA1074289A/en not_active Expired
- 1976-04-20 IN IN675/CAL/76A patent/IN144959B/en unknown
- 1976-05-20 JP JP51058454A patent/JPS5227083A/ja active Granted
- 1976-06-24 PT PT65270A patent/PT65270B/pt unknown
- 1976-07-05 YU YU1634/76A patent/YU39770B/xx unknown
- 1976-07-26 ES ES450151A patent/ES450151A1/es not_active Expired
- 1976-08-13 BG BG033991A patent/BG29274A3/xx unknown
- 1976-08-23 NO NO762898A patent/NO146139C/no unknown
- 1976-08-25 TR TR19689A patent/TR19689A/xx unknown
- 1976-08-25 FI FI762451A patent/FI60716C/fi not_active IP Right Cessation
- 1976-08-26 RO RO7687373A patent/RO69971A/ro unknown
- 1976-08-26 BE BE170090A patent/BE845535A/xx not_active IP Right Cessation
-
1977
- 1977-02-04 US US05/765,471 patent/US4101722A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
YU163476A (en) | 1982-05-31 |
CA1074289A (en) | 1980-03-25 |
ES450151A1 (es) | 1977-06-16 |
FI60716C (fi) | 1982-03-10 |
PT65270B (fr) | 1977-12-07 |
RO69971A (ro) | 1981-07-30 |
NO762898L (no) | 1977-03-01 |
US4101722A (en) | 1978-07-18 |
IN144959B (no) | 1978-08-05 |
YU39770B (en) | 1985-04-30 |
BE845535A (fr) | 1977-02-28 |
TR19689A (tr) | 1979-10-11 |
FI60716B (fi) | 1981-11-30 |
FI762451A (no) | 1977-02-27 |
NO146139B (no) | 1982-04-26 |
US4053436A (en) | 1977-10-11 |
JPS5411355B2 (no) | 1979-05-14 |
JPS5227083A (en) | 1977-03-01 |
NO146139C (no) | 1982-08-04 |
PT65270A (fr) | 1976-07-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BG29274A3 (en) | Method of obtaining of catalyst for olefines copolymerisation | |
ES395791A1 (es) | Un procedimiento perfeccionado para polimerizacion catali- ca de 1-olefinas. | |
SE8001906L (sv) | Kiseldioxid-aluminiumoxidhydrogelkatalysator | |
ES8202347A1 (es) | Procedimiento para producir un catalizador conteniendo cromo | |
ES410361A1 (es) | Procedimiento de preparacion de un catalizador de polimeri-zacion de olefinas. | |
ES491127A0 (es) | Procedimiento para la depuracion de soluciones organicas de peracidos carboxilicos | |
ES442868A1 (es) | Procedimiento de obtencion de un catalizador de xerogel de acido silicicontrioxido cromico. | |
ATE12221T1 (de) | Verfahren zur hestellung von einem glutaraldehydvorlaeufer. | |
GB638031A (en) | Improvements in or relating to the manufacture of catalysts | |
GB1340230A (en) | Preparation of silica of high pore volume | |
ES444508A1 (es) | Procedimiento para la preparacion de florogucina. | |
GB1430337A (en) | Process for the manufacture of methacrylic acid and oxidation catalyst therefor | |
SU682513A1 (ru) | Натриевые соли алкилфенилэтилоксиэтансульфокислот как анионные поверхностноактивные вещества | |
ES447413A1 (es) | Procedimiento para preparar acido perpropionico. | |
ES372901A1 (es) | Procedimiento para la preparacion de un producto de reac- cion soluble en agua. | |
SU123956A1 (ru) | Способ получени фурфурола дегидратацией пентоз в присутствии катализаторов | |
JPS5618610A (en) | Polymerization of olefin | |
SU127243A1 (ru) | Способ получени широкопористого носител из силикагел или алюмосиликата | |
SU457701A1 (ru) | Способ получени хинальдиновой кислоты | |
SU1003883A1 (ru) | Способ приготовлени сферического носител дл катализатора окислени аммиака | |
SU508050A1 (ru) | Способ получения изопрена | |
SU151684A1 (ru) | Способ получени малеинового ангидрида | |
GB659864A (en) | A method of purifying di-ammonium phosphate | |
GB821102A (en) | Production of improved silica gel-type catalysts | |
SU1089087A1 (ru) | Способ получени 2,4-диаминобензонитрила |