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RU95118158A - METHOD FOR PRODUCING DIFFORMETHANE - Google Patents

METHOD FOR PRODUCING DIFFORMETHANE

Info

Publication number
RU95118158A
RU95118158A RU95118158/04A RU95118158A RU95118158A RU 95118158 A RU95118158 A RU 95118158A RU 95118158/04 A RU95118158/04 A RU 95118158/04A RU 95118158 A RU95118158 A RU 95118158A RU 95118158 A RU95118158 A RU 95118158A
Authority
RU
Russia
Prior art keywords
zinc
catalyst
fluoride
chromium
producing
Prior art date
Application number
RU95118158/04A
Other languages
Russian (ru)
Other versions
RU2116288C1 (en
Inventor
Дэвид Скотт Джон
Джон Уотсон Майкл
Уилльям Боннифейс Дэвид
Original Assignee
Империал Кемикал Индастриз ПЛС
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.)
Filing date
Publication date
Priority claimed from GB939306072A external-priority patent/GB9306072D0/en
Priority claimed from GB939306089A external-priority patent/GB9306089D0/en
Application filed by Империал Кемикал Индастриз ПЛС filed Critical Империал Кемикал Индастриз ПЛС
Publication of RU95118158A publication Critical patent/RU95118158A/en
Application granted granted Critical
Publication of RU2116288C1 publication Critical patent/RU2116288C1/en

Links

Claims (5)

1. Способ получения дифторметана, включающий контактирование дихлорметана с фтористым водородом в присутствии катализатора фторирования, отличающийся тем, что используют катализатор, содержащий цинк или соединение цинка и оксид, фторид или оксифторид металла.1. A method of producing difluoromethane, comprising contacting dichloromethane with hydrogen fluoride in the presence of a fluorination catalyst, characterized in that they use a catalyst containing zinc or a zinc compound and a metal oxide, fluoride or oxyfluoride. 2. Способ по п. 1, отличающийся тем, что катализатор включает цинк или соединение цинка, оксид хрома, фторид хрома или оксифторид хрома. 2. The method according to p. 1, characterized in that the catalyst comprises zinc or a zinc compound, chromium oxide, chromium fluoride or chromium oxyfluoride. 3. Способ по п. 1 или 2, отличающийся тем, что процесс осуществляют при температуре около 240 - 320oС.3. The method according to p. 1 or 2, characterized in that the process is carried out at a temperature of about 240 - 320 o C. 4. Способ по п. 1 или 2, отличающийся тем, что молярное соотношение фтористого водорода и дихлорметана составляет 5 - 25 : 1. 4. The method according to p. 1 or 2, characterized in that the molar ratio of hydrogen fluoride and dichloromethane is 5 to 25: 1. 5. Способ по п. 1, отличающийся тем, что содержание цинка в расчете на общую массу катализатора составляет около 0,5 - 30,0%. 5. The method according to p. 1, characterized in that the zinc content calculated on the total weight of the catalyst is about 0.5 to 30.0%.
RU95118158A 1993-03-24 1994-03-14 Method of preparing difluoromethane RU2116288C1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB939306072A GB9306072D0 (en) 1993-03-24 1993-03-24 Production of difluoromethane
GB9306089.5 1993-03-24
GB9306072.1 1993-03-24
GB939306089A GB9306089D0 (en) 1993-03-24 1993-03-24 Production of difluoromethane

Publications (2)

Publication Number Publication Date
RU95118158A true RU95118158A (en) 1997-09-20
RU2116288C1 RU2116288C1 (en) 1998-07-27

Family

ID=26302637

Family Applications (2)

Application Number Title Priority Date Filing Date
RU95118158A RU2116288C1 (en) 1993-03-24 1994-03-14 Method of preparing difluoromethane
RU95121816A RU2127246C1 (en) 1993-03-24 1994-03-14 Process for preparing difluoromethane (variants)

Family Applications After (1)

Application Number Title Priority Date Filing Date
RU95121816A RU2127246C1 (en) 1993-03-24 1994-03-14 Process for preparing difluoromethane (variants)

Country Status (15)

Country Link
US (2) US5672786A (en)
EP (2) EP0690833B1 (en)
JP (2) JPH08508029A (en)
KR (2) KR100323102B1 (en)
CN (2) CN1044227C (en)
AU (2) AU691487B2 (en)
BR (2) BR9406236A (en)
CA (2) CA2157528C (en)
DE (2) DE69410455T2 (en)
ES (2) ES2115940T3 (en)
GB (2) GB9404703D0 (en)
RU (2) RU2116288C1 (en)
TW (1) TW290531B (en)
UA (2) UA40612C2 (en)
WO (2) WO1994021579A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2736050B1 (en) 1995-06-29 1997-08-01 Atochem Elf Sa PROCESS FOR PRODUCING DIFLUOROMETHANE
US5763708A (en) * 1995-09-20 1998-06-09 Allied Signal Inc. Process for the production of difluoromethane
FR2748022B1 (en) * 1996-04-29 1998-07-24 Atochem Elf Sa PROCESS FOR PRODUCING DIFLUOROMETHANE
BE1010626A3 (en) * 1996-09-16 1998-11-03 Solvay Process for the preparation of difluoromethane.
US5800682A (en) * 1996-10-08 1998-09-01 Alliedsignal Inc. Process for the production of difluoromethane
BE1012227A3 (en) * 1998-10-12 2000-07-04 Solvay CATALYST AND hydrofluorination process.
WO2004007410A1 (en) * 2002-07-10 2004-01-22 Srf Limited A process for the production of difluoromethane
AU2002317470A1 (en) * 2002-07-10 2004-02-02 Srf Limited A process for the production of difluoromethane
KR100512845B1 (en) * 2002-11-21 2005-09-07 울산화학주식회사 manufacturing method for difluoromethane
TW200516068A (en) * 2003-09-10 2005-05-16 Showa Denko Kk Process for production of hydrofluorocarbons, products thereof and use of the products
US7371905B2 (en) * 2003-10-17 2008-05-13 Honeywell International Inc. Method of producing hydrofluorocarbons
US7112708B2 (en) 2004-04-01 2006-09-26 Honeywell International Inc. Method of making difluoromethane, 1,1,1-trifluoroethane and 1,1-difluoroethane
WO2010026383A2 (en) * 2008-09-05 2010-03-11 Ineos Fluor Holdings Limited Catalyst and process using the catalyst
TWI615194B (en) * 2011-10-12 2018-02-21 拜耳智慧財產有限公司 Catalytic vapor phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethane to produce 1-chloro-2,2-difluoroethane
JP2014221727A (en) * 2013-05-13 2014-11-27 昭和電工株式会社 Dichloromethane purification method and method of producing difluoromethane using the same
CN114425275B (en) * 2020-09-18 2023-08-15 中国石油化工股份有限公司 Methane oxidative coupling reactor and application thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744148A (en) * 1952-02-04 1956-05-01 Dow Chemical Co Process for fluorination of haloalkanes using a hydrogen fluoride activated catalyst containing alumina, a metal fluoride and basic aluminum fluoride
US2745886A (en) * 1955-01-31 1956-05-15 Dow Chemical Co Process for fluorinating aliphatic halohydrocarbons with a chromium fluoride catalyst and process for preparing the catalyst
EP0128510A3 (en) * 1983-06-07 1985-05-15 Showa Denko Kabushiki Kaisha Process for producing difluoromethane
GB9104775D0 (en) * 1991-03-07 1991-04-17 Ici Plc Fluorination catalyst and process
US5300710A (en) * 1991-03-20 1994-04-05 E. I. Du Pont De Nemours And Company Process for the manufacture of 2-chloro-1,1,1,2-tetrafluoroethane and pentafluoroethane
US5208395A (en) * 1992-04-06 1993-05-04 Elf Atochem North America, Inc. Manufacture of hydrofluorocarbons
DE69407870T2 (en) * 1993-06-18 1998-08-27 Showa Denko Kk Fluorination catalyst and fluorination process
KR960022411A (en) * 1994-12-28 1996-07-18 남경희 Method for preparing difluoromethane

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