KR940002205A - Method for preparing dichlorofluoroethane and chlorodifluoroethane - Google Patents

Method for preparing dichlorofluoroethane and chlorodifluoroethane Download PDF

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Publication number
KR940002205A
KR940002205A KR1019920012605A KR920012605A KR940002205A KR 940002205 A KR940002205 A KR 940002205A KR 1019920012605 A KR1019920012605 A KR 1019920012605A KR 920012605 A KR920012605 A KR 920012605A KR 940002205 A KR940002205 A KR 940002205A
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South Korea
Prior art keywords
hcfc
trichloroethane
difluoro
hydrogen fluoride
fluoroethane
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KR1019920012605A
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Korean (ko)
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KR950011100B1 (en
Inventor
김홍곤
김훈식
권영수
박건유
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박원희
한국과학기술연구원
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Priority to KR1019920012605A priority Critical patent/KR950011100B1/en
Publication of KR940002205A publication Critical patent/KR940002205A/en
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Publication of KR950011100B1 publication Critical patent/KR950011100B1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C19/00—Acyclic saturated compounds containing halogen atoms
    • C07C19/08—Acyclic saturated compounds containing halogen atoms containing fluorine
    • 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
    • C07C17/10—Preparation of halogenated hydrocarbons by replacement by halogens of hydrogen atoms

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

Abstract

본 발명은 1,1,1-트리클로로에탄과 불화수소를 무촉매 반응시켜 1,1-디클로로플루오로에탄(HCFC 141b)과 1-클로로-1,1-디플루오로에탄(HCFC 142b)를 제조함에 있어서, 전환율이 높고 반응생성물인 HCFC 141b및 HCFC 142b의 선택성을 높여줄 수 있는 HCFC-141b 및 HCFC-142b의 제조방법에 관한 것이다.In the present invention, 1,1-dichlorofluoroethane (HCFC 141b) and 1-chloro-1,1-difluoroethane (HCFC 142b) are reacted by noncatalytic reaction of 1,1,1-trichloroethane and hydrogen fluoride. In the preparation, the present invention relates to a method for producing HCFC-141b and HCFC-142b, which has high conversion and can increase the selectivity of the reaction products, HCFC 141b and HCFC 142b.

본 발명은 불화수소와 1,1,1-트리클로로에탄에 대한 용해도가 큰 반응행성물중의 하나인 HCFC-142b를 반응공정중에서 1,1,1-트리클로로에탄에 대해 20 mole% 이상 유지시켜 주므로서 유기층에 대한 불화수소의 용해도를 즈대시켜주고 1,1,1-트리클로로에탄 또는 비닐리덴클로라이드와 불화수소간의 반응을 촉진시켜 주는 동시에 염화수소 및 저비점 클로로플루오로 카본류를 제외한 반응혼합물을 반응기 하부로 부터 연속적으로 취출하여 생성물 분리후 재순환시켜 반응물의 반응기내 체류시간을 단축하므로서 타르의 생성을 방지시켜 줄 수 있도록 한 것이다.The present invention maintains at least 20 mole% of HCFC-142b, which is one of the highly soluble reactants for hydrogen fluoride and 1,1,1-trichloroethane, in 1,1,1-trichloroethane during the reaction process. By increasing the solubility of hydrogen fluoride in the organic layer and promoting the reaction between 1,1,1-trichloroethane or vinylidene chloride and hydrogen fluoride, The product was continuously taken out from the bottom of the reactor and recycled after separation of the product, thereby shortening the residence time of the reactants in the reactor, thereby preventing tar generation.

Description

디클로로플루오로에탄 및 클로로디플루오로에탄의 제조방법Method for preparing dichlorofluoroethane and chlorodifluoroethane

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (5)

1,1,1-트리클로로에탄과 불화수소를 무촉매 반응시켜 1,1-디클로로-1-플루오로에탄 및 1,1-디플루오로-1-클로로에탄을 제조함에 있어서, 반응계내 유기물중 1,1-디플루오로-1-클로로에탄올 1,1,1-트리클로로에탄에 대하여 20몰% 이상 유지시켜 1,1-디클로로-1-플루오로에탄 및 1,1-디플루오로-1-클로로에탄을 제조하는 방법.In preparing 1,1-dichloro-1-fluoroethane and 1,1-difluoro-1-chloroethane by noncatalytic reaction of 1,1,1-trichloroethane and hydrogen fluoride, 1,1-difluoro-1-chloroethanol 1,1-dichloro-1-fluoroethane and 1,1-difluoro-1 by maintaining at least 20 mol% relative to 1,1,1-trichloroethane To prepare chloroethane. 제1항에 있어서, 불화수소/1,1,1-트리클로로에탄의 몰비가 3∼8인 1,1-디클로로-1-플루오로에탄 및 1,1-디플루오로-1-클로로에탄을 제조하는 방법.The 1,1-dichloro-1-fluoroethane and 1,1-difluoro-1-chloroethane according to claim 1, wherein the molar ratio of hydrogen fluoride / 1,1,1-trichloroethane is 3-8. How to manufacture. 제1항에 있어서, 반응온도가 70∼120℃인 1,1-디클로로-1-플루오로에탄 및 1,1-디플루오로-1-클로로에탄을 제조하는 방법.The process for producing 1,1-dichloro-1-fluoroethane and 1,1-difluoro-1-chloroethane according to claim 1, wherein the reaction temperature is 70 to 120 ° C. 제1항에 있어서, 반응압력이 6∼15 기압인 1,1-디클로로-1-플루오로에탄 및 1,1-디플루오로-1-클로로에탄을 제조하는 방법.The process for producing 1,1-dichloro-1-fluoroethane and 1,1-difluoro-1-chloroethane according to claim 1, wherein the reaction pressure is 6 to 15 atmospheres. 제1항에 있어서, 염화수소(HCl)는 탑상으로 제거하고 반응생성물은 반응기 하단으로부터 연속적으로 취출하여 1,1-디클로로-1-플루오로에탄 및 1,1-디플루오로-1-클로로에탄을 분리후 미 반응물을 재순환시키는 1,1-디클로로-1-플루오로에탄 및 1,1-디플루오로-1-클로로에탄을 제조하는 방법.The method of claim 1, wherein the hydrogen chloride (HCl) is removed to the column and the reaction product is withdrawn continuously from the bottom of the reactor to 1,1-dichloro-1-fluoroethane and 1,1-difluoro-1-chloroethane A process for preparing 1,1-dichloro-1-fluoroethane and 1,1-difluoro-1-chloroethane, wherein the unreacted material is recycled after separation. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920012605A 1992-07-15 1992-07-15 Preparation of dichlorofhioroethane and chlorodifhcoroethane KR950011100B1 (en)

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KR1019920012605A KR950011100B1 (en) 1992-07-15 1992-07-15 Preparation of dichlorofhioroethane and chlorodifhcoroethane

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Application Number Priority Date Filing Date Title
KR1019920012605A KR950011100B1 (en) 1992-07-15 1992-07-15 Preparation of dichlorofhioroethane and chlorodifhcoroethane

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KR940002205A true KR940002205A (en) 1994-02-16
KR950011100B1 KR950011100B1 (en) 1995-09-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102607545B1 (en) * 2023-09-21 2023-11-29 김민구 Method and device for adaptive cutting feed control in cnc machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102607545B1 (en) * 2023-09-21 2023-11-29 김민구 Method and device for adaptive cutting feed control in cnc machine

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