RU95119023A - Method for purification of 1,1-difluroethane - Google Patents

Method for purification of 1,1-difluroethane

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Publication number
RU95119023A
RU95119023A RU95119023/04A RU95119023A RU95119023A RU 95119023 A RU95119023 A RU 95119023A RU 95119023/04 A RU95119023/04 A RU 95119023/04A RU 95119023 A RU95119023 A RU 95119023A RU 95119023 A RU95119023 A RU 95119023A
Authority
RU
Russia
Prior art keywords
difluoroethane
fluorine
purification
vinyl chloride
solvent
Prior art date
Application number
RU95119023/04A
Other languages
Russian (ru)
Other versions
RU2098399C1 (en
Inventor
А.К. Денисов
А.С. Дедов
А.Л. Гольдинов
А.Н. Голубев
Н.С. Верещагина
Т.А. Гусева
Original Assignee
Акционерное общество "Кирово-Чепецкий химический комбинат им.Б.П.Константинова"
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 Акционерное общество "Кирово-Чепецкий химический комбинат им.Б.П.Константинова" filed Critical Акционерное общество "Кирово-Чепецкий химический комбинат им.Б.П.Константинова"
Priority to RU95119023A priority Critical patent/RU2098399C1/en
Publication of RU95119023A publication Critical patent/RU95119023A/en
Application granted granted Critical
Publication of RU2098399C1 publication Critical patent/RU2098399C1/en

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  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

FIELD: chemical industry. SUBSTANCE: method involves purification of 1,1-difluoroethane against impurities of vinyl chloride. Said purification comprises treatment of 1,1-difluoroethane by fluorinated agent which takes place by bringing said gaseous fluorinated agent into contact with liquid phase being prepared directly by 1,1-difluoroethane or by solution of 1,1-difluroethane in solvent which is inert in respect with fluorine. Molar ratio of fluorine being fed and vinyl chloride is 1.2-5. Halogenated carbon which does not contain hydrogen (e. g. 1,1,2-trifluorotrichloroethane), perfluorodecaline, perfluoromethyl cyclohexane, perflurodimethyl cyclohexane are used as mentioned above solvent. Said treatment may be carried out in reactor of column type. Desired product may be affected by additional purification with the help of synthetic zeolite, said purification takes place in gaseous phase at expense 20-50 l/h per 1 l of adsorbent. EFFECT: improves efficiency of the method, simplifies the method. 2 cl, 4 tbl

Claims (1)

Способ очистки 1,1-дифторэтана относится к химической промышленности и может быть использован для удаления примеси хлористого винила из 1,1-дифторэтана (хладона 152а) - озонобезопасного хладона, применяемого как хладагент, порофор, сырье для синтеза фторорганических продуктов. Способ включает обработку 1,1-дифторэтана фторирующим агентом - фтором или его смесью с инертным газом путем контактирования газообразного фторирующего агента с жидкой фазой, создаваемой непосредственно 1,1-дифторэтаном или раствором последнего в индифферентном к действию фтора растворителе. Молярное отношение подаваемого фтора к хлористому винилу 1,2 - 5,0. В качестве растворителя используют галогенуглерод, не содержащий водорода, например 1,1,2-трифтортрихлорэтан (хладон 113), перфтордекалин, перфторметилциклогексан, перфтордиметилциклогексан. Достоинства способа - простота и эффективность. Обработку можно проводить в реакторе колонного типа, вводя фтор в нескольких точках по высоте, или в несколько ступеней. Продукт можно подвергнуть доочистке сорбентом - синтетическим оцеолитом типа NaA или Na-морденитом. Доочисткуо ведут в газовой фазе при нагрузке 20 - 50 л/ч на 1 л адсорбента.The purification method of 1,1-difluoroethane belongs to the chemical industry and can be used to remove vinyl chloride impurities from 1,1-difluoroethane (freon 152a), an ozone-safe freon used as a refrigerant, porophore, and raw material for the synthesis of organofluorine products. The method includes treating 1,1-difluoroethane with a fluorinating agent — fluorine or a mixture thereof with an inert gas by contacting a gaseous fluorinating agent with a liquid phase created directly by 1,1-difluoroethane or a solution of the latter in a fluorine-indifferent solvent. The molar ratio of the supplied fluorine to vinyl chloride is 1.2 - 5.0. As the solvent, a hydrogen-free halocarbon is used, for example 1,1,2-trifluorotrichloroethane (HFC 113), perfluorodecalin, perfluoromethylcyclohexane, perfluorodimethylcyclohexane. The advantages of the method are simplicity and effectiveness. Processing can be carried out in a column reactor, introducing fluorine at several points in height, or in several steps. The product can be further treated with a sorbent - synthetic oceolite of the NaA type or Na mordenite. Post-treatment is carried out in the gas phase at a load of 20-50 l / h per 1 liter of adsorbent.
RU95119023A 1995-11-09 1995-11-09 Method of 1,1-difluoroethane refining RU2098399C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU95119023A RU2098399C1 (en) 1995-11-09 1995-11-09 Method of 1,1-difluoroethane refining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU95119023A RU2098399C1 (en) 1995-11-09 1995-11-09 Method of 1,1-difluoroethane refining

Publications (2)

Publication Number Publication Date
RU95119023A true RU95119023A (en) 1996-11-20
RU2098399C1 RU2098399C1 (en) 1997-12-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
RU95119023A RU2098399C1 (en) 1995-11-09 1995-11-09 Method of 1,1-difluoroethane refining

Country Status (1)

Country Link
RU (1) RU2098399C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018142231A1 (en) * 2017-02-03 2018-08-09 Reliance Industries Limited A process for removing chloride from a polymer melt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2771737B1 (en) 1997-12-01 2000-02-04 Solvay PROCESSES FOR THE PRODUCTION AND PURIFICATION OF 1,1-DIFLUOROETHANE AND PRODUCT THUS OBTAINED

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018142231A1 (en) * 2017-02-03 2018-08-09 Reliance Industries Limited A process for removing chloride from a polymer melt

Also Published As

Publication number Publication date
RU2098399C1 (en) 1997-12-10

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