BR9814979A - Processo para a preparação de difluormetano - Google Patents

Processo para a preparação de difluormetano

Info

Publication number
BR9814979A
BR9814979A BR9814979-2A BR9814979A BR9814979A BR 9814979 A BR9814979 A BR 9814979A BR 9814979 A BR9814979 A BR 9814979A BR 9814979 A BR9814979 A BR 9814979A
Authority
BR
Brazil
Prior art keywords
difluoromethane
preparation
reactor
difluormetan
reacted
Prior art date
Application number
BR9814979-2A
Other languages
English (en)
Inventor
Gustavo Cerri
Maurice William Hunt
David W Keeler
Frank P Young
Original Assignee
Allied Signal Inc
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
Application filed by Allied Signal Inc filed Critical Allied Signal Inc
Publication of BR9814979A publication Critical patent/BR9814979A/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
    • C07C17/20—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/38—Separation; Purification; Stabilisation; Use of additives
    • C07C17/383—Separation; Purification; Stabilisation; Use of additives by distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
    • C07C17/20—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
    • C07C17/202—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction
    • C07C17/206—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction the other compound being HX
    • 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
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

"PROCESSO PARA, A PREPARAçãO DE DIFLUORMETANO".Proporciona-se um processo de fluoração em fase líquida para aprodução de difluormetano sem corrosão. No processo destainvenção, o cloreto de metileno e o fluoreto de hidrogênio sãoreagidos em um reator feito de polímero fluorado para a produçãode um produto de reação enquanto uma corrente de reciclagemaquecida de reagentes do processo é alimentada ao reator.
BR9814979-2A 1997-11-18 1998-11-18 Processo para a preparação de difluormetano BR9814979A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US97253197A 1997-11-18 1997-11-18
PCT/US1998/024661 WO1999025670A1 (en) 1997-11-18 1998-11-18 Process for the preparation of difluoromethane

Publications (1)

Publication Number Publication Date
BR9814979A true BR9814979A (pt) 2001-11-20

Family

ID=25519763

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9814979-2A BR9814979A (pt) 1997-11-18 1998-11-18 Processo para a preparação de difluormetano

Country Status (10)

Country Link
US (1) US6166275A (pt)
EP (1) EP1042256A1 (pt)
JP (1) JP2001523652A (pt)
KR (1) KR20010032248A (pt)
CN (1) CN1285812A (pt)
AU (1) AU1419399A (pt)
BR (1) BR9814979A (pt)
CA (1) CA2310657A1 (pt)
NZ (1) NZ504616A (pt)
WO (1) WO1999025670A1 (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9407257D0 (en) * 1993-04-22 1994-06-08 Ici Plc Vaporisation of liquids
AU2001292985A1 (en) * 2000-09-28 2002-04-08 Honeywell International, Inc. Fluorination process
US7189311B2 (en) * 2001-03-23 2007-03-13 Honeywell International Inc. Purification of difluoromethane
US6605193B2 (en) * 2001-04-25 2003-08-12 Atofina Chemicals, Inc. Recovery of HFC-32
WO2003002251A2 (en) * 2001-06-28 2003-01-09 Honeywell International, Inc. Process for preparing fluorination catalyst
US7371905B2 (en) * 2003-10-17 2008-05-13 Honeywell International Inc. Method of producing hydrofluorocarbons
FR2994430B1 (fr) 2012-08-10 2014-12-19 Arkema France Procede de production du difluoromethane
CN104086356B (zh) * 2014-06-26 2016-01-20 聊城氟尔新材料科技有限公司 一种二氟甲烷和氯化氢干法分离的装置和工艺
CN110790633A (zh) * 2019-10-09 2020-02-14 浙江大学 一种液相法管道化多联产生产r32和r31的方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749375A (en) * 1956-06-05 Fluorination
US2749374A (en) * 1950-02-24 1956-06-05 Dow Chemical Co Production of methylene fluoride
JPS5946211B2 (ja) * 1975-12-29 1984-11-10 ダイキン工業株式会社 １− クロロ −１，１− ジフルオロエタンマタハ ／ オヨビ １，１，１− トリフルオロエタンオセイゾウスルホウホウ
BE1005095A3 (fr) * 1991-07-10 1993-04-20 Solvay Procede pour la preparation de 1,1-dichloro-1,3,3,3-tetrafluoropropane.
BR9508062A (pt) * 1994-06-20 1997-08-12 Daikin Ind Ltd Processo para e preparação de difluorometano
KR960022411A (ko) * 1994-12-28 1996-07-18 남경희 디플루오로메탄의 제조방법
US5763708A (en) * 1995-09-20 1998-06-09 Allied Signal Inc. Process for the production of difluoromethane
FR2748022B1 (fr) * 1996-04-29 1998-07-24 Atochem Elf Sa Procede de fabrication du difluoromethane

Also Published As

Publication number Publication date
WO1999025670A1 (en) 1999-05-27
CN1285812A (zh) 2001-02-28
KR20010032248A (ko) 2001-04-16
CA2310657A1 (en) 1999-05-27
AU1419399A (en) 1999-06-07
JP2001523652A (ja) 2001-11-27
NZ504616A (en) 2002-02-01
US6166275A (en) 2000-12-26
EP1042256A1 (en) 2000-10-11

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Legal Events

Date Code Title Description
B08F Application fees: application dismissed [chapter 8.6 patent gazette]

Free format text: REFERENTE A 7O E 8O ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1910 DE 14/08/2007.