Production of 1,1,1,2-tetrafluoroethykane and pentafuoethane simultaneously

A technology for pentafluoroethane and tetrafluoroethane, applied in the field of preparing fluorine-containing alkanes, can solve the problems such as no disclosure of R123 manufacturing method, inability to simultaneously prepare R134a and R125, and inability to simultaneously prepare R134A and R125, etc. Equipment cost and energy consumption cost, the effect of reducing the types of raw materials
CN100338001CInactive Publication Date: 2007-09-19浙江莹光化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
浙江莹光化工有限公司
Publication Date
2007-09-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

Production of 1,1,1,2-tetrafluoroethane and pentafluoethane simultaneously is carried out by taking chlorylene as raw material, reacting with Cl2 with anhydrous ferric chloride as catalyst to generate pentaline partly, reacting with HF with mixture of antimony chloride and anhydrous ferric chloride as catalyst to generate mixture of 1,1,1-trifluoride-2-chloroethane and 1,1,1,2-tetrafluoride-2-hydrochloric ether, reacting with HF at 200~400DEG C and 0~0.5Mpa with mixture of CrF3, AlF3, ZnF2 and MgF2 as catalyst to generate mixture of 1,1,1,2-tetrafluoroethane and pentafluoethane, separating, washing, alkali washing, dewatering, rectifying and drying to obtain 1,1,1,2-tetrafluoroethane and pentafluoethane.
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Description

technical field

[0001] The invention relates to a method for preparing fluorine-containing alkanes, in particular to a method for simultaneously preparing 1,1,1,2-tetrafluoroethane and pentafluoroethane. Background technique

[0002] Due to the traditional widely used CF 2 Cl 2 、CHF 2 Refrigerants such as Cl and R502 are chlorine-containing halogenated alkanes, which will destroy the ozone layer above the earth, so they are restricted or banned by a series of international treaties. The substitutes for chlorine-containing halogenated hydrocarbon refrigerants are some chlorine-free fluoroalkanes, such as difluoromethane (R32), 1,1,1,2-tetrafluoroethane (R134a, hereinafter referred to as R134a), pentafluoroethane (R125, hereinafter referred to as R125), etc., especially R134a and R125, are often used as components of mixed refrigerants at the same time.

[0003] At present, R134a is obtained by using trichlorethylene (TCE, hereinafter referred to as TCE) and anhydrous hydr...

Claims

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