SU425467A1 - The method of obtaining -difluoroacrylonitrile - Google Patents
The method of obtaining -difluoroacrylonitrileInfo
- Publication number
- SU425467A1 SU425467A1 SU1675811A SU1675811A SU425467A1 SU 425467 A1 SU425467 A1 SU 425467A1 SU 1675811 A SU1675811 A SU 1675811A SU 1675811 A SU1675811 A SU 1675811A SU 425467 A1 SU425467 A1 SU 425467A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- difluoroacrylonitrile
- conversion
- obtaining
- freon
- acrylonitrile
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
1one
Изобретение относитс к способам получени р, |3 - дифторакрилопитрила - денного мономера дл получени фторсодержащих полимеров и сополимеров.The invention relates to methods for producing p, | 3 - difluoroacrylopitrile - monomer for the preparation of fluorine - containing polymers and copolymers.
Известен способ получени р,р-дифторакрилонитрила , по которому смесь тетрафторзтилена и акрилонитрила подвергают пиролизу при 680-730° С. Выход целевого продукта составл ет 19-26% при конверсии исходных олефинов около 10%. Однако исходные реагенты - тетрафторэтилен и акрилонитрил ,-которые широко используют в производстве полимерных материалов, дефицитны, а та:кже конверси указанных мономеров в процессе пиролиза низка.A method of producing p, p-difluoroacrylonitrile is known, in which a mixture of tetrafluoroethylene and acrylonitrile is subjected to pyrolysis at 680-730 ° C. The yield of the desired product is 19-26% with a conversion of the starting olefins about 10%. However, the initial reagents - tetrafluoroethylene and acrylonitrile, which are widely used in the production of polymeric materials, are scarce, and that: the conversion of the indicated monomers is also low during the pyrolysis process.
Цель изобретени - повышение конверсии исходных веш,еств и расширение сырьевой базы.The purpose of the invention is to increase the conversion of raw materials and expand the resource base.
Дл достижени этой цели предлагаетс ацетонитрил подвергать взаимодействию с дифтордихлорметаном (,фреоном-12) при 600-1000° С. Выделение целевого продукта из реакционной смеси и его очистку осуществл ют известными приемами, например ректификацией .To achieve this goal, acetonitrile is proposed to be reacted with difluorodichloromethane (, freon-12) at 600-1000 ° C. The selection of the target product from the reaction mixture and its purification are carried out using known methods, for example, by distillation.
Процесс предпочтительно осуществл ть при давлении 0,1-2 ати, мол рном соотнощеН .ИИ акрилонитрил:дифтордихлорметан 0,1-10 и времени удерж1ивани веществ в зоне реакции 0,01 - 1 сек.The process is preferably carried out at a pressure of 0.1-2 MPa, a molar ratio of Acrylonitrile: difluorodichloromethane 0.1-10 and a retention time of substances in the reaction zone of 0.01-1 sec.
Предлагаемый способ поз1вол ет получать 5,р-дифторакрилонитрил с выходом 30-35% из легкодоступного сырь - ацетонитрила - побочного продукта в производстве акрилонитр .ила и фреона-12, который вл етс одним из наиболее дешевых фторорганических соединений. Конверси исходного сырь в целевой продукт составл ет 30-40%.The proposed method allows to obtain 5, p-difluoroacrylonitrile with a yield of 30-35% from readily available raw material, acetonitrile, a by-product in the production of acrylonitroyl and freon-12, which is one of the cheapest organofluorine compounds. The conversion of the feedstock into the desired product is 30-40%.
Пример. Через кварцевую трубку диаметром 26 мм с длиной обогреваемой зоны, равной 120 мм, пропускают при 800° С со скоростью 73 л/час смесь фреона-12 и акрилонитрила в эквимол рном соотношении в течение 6 час. Получают 1350 г сырого продукта, содержащего 8,8% р,р-дифторакрилонитрила и 52% исходного фреона. Ректификацией выдел ют (3,|3-дифторакрилон1итрил с чистотой более 99%, выход 34%, счита на превращенный фреон-12, конверси фреона-12 33%, р,|3-дифтора:крилонитрил килит при 66,3 - 67,5° С п25 ,3463.Example. A mixture of freon-12 and acrylonitrile in an equimolar ratio for 6 hours is passed through a quartz tube with a diameter of 26 mm and a length of the heated zone of 120 mm at a speed of 73 l / h. 1350 g of crude product are obtained, containing 8.8% p, p-difluoroacrylonitrile and 52% of the original freon. The distillation isolated (3, | 3-difluoroacrylon1itrile with a purity of more than 99%, yield 34%, calculated for converted freon-12, conversion of freon-12 33%, p, | 3-difluoro: krilonitrile kilit at 66.3 - 67, 5 ° C p25, 3463.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1675811A SU425467A1 (en) | 1971-06-21 | 1971-06-21 | The method of obtaining -difluoroacrylonitrile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1675811A SU425467A1 (en) | 1971-06-21 | 1971-06-21 | The method of obtaining -difluoroacrylonitrile |
Publications (1)
Publication Number | Publication Date |
---|---|
SU425467A1 true SU425467A1 (en) | 1976-03-05 |
Family
ID=20481086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1675811A SU425467A1 (en) | 1971-06-21 | 1971-06-21 | The method of obtaining -difluoroacrylonitrile |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU425467A1 (en) |
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1971
- 1971-06-21 SU SU1675811A patent/SU425467A1/en active
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