Method of hydrodechlorination to produce dihydrofluorinated olefins
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C07C-017/10
C07C-017/00
출원번호
US-0641875
(2009-12-18)
등록번호
US-8399721
(2013-03-19)
발명자
/ 주소
Nappa, Mario Joseph
Swearingen, Ekaterina N.
출원인 / 주소
E I du Pont de Nemours and Company
인용정보
피인용 횟수 :
1인용 특허 :
4
초록▼
Disclosed is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkene with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents of the chlorofluoroalkene with hydrogen to produce a fluorine
Disclosed is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkene with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents of the chlorofluoroalkene with hydrogen to produce a fluorine-containing olefin, wherein said catalyst is a composition comprising chromium, nickel and optionally an alkali metal selected from potassium and cesium. Also disclosed are catalyst compositions for the hydrodechlorination of chlorofluoroalkenes comprising copper, nickel, and an alkali metal selected from potassium and cesium, and methods of making such catalysts.
대표청구항▼
1. A process for the preparation of fluorine-containing olefins, comprising contacting a chlorofluoroalkene of the formula RfCCI═CCIRf wherein each Rf is a perfluoroalkyl group independently selected from the group consisting of CF3, C2F5, n-C3F7, i-C3F7, n-C4F9, i-C4F9 and t-C4F9, with hydrogen in
1. A process for the preparation of fluorine-containing olefins, comprising contacting a chlorofluoroalkene of the formula RfCCI═CCIRf wherein each Rf is a perfluoroalkyl group independently selected from the group consisting of CF3, C2F5, n-C3F7, i-C3F7, n-C4F9, i-C4F9 and t-C4F9, with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of at least one of the chlorine substituents of the chlorofluoroalkene with hydrogen to produce a product mixture comprising a fluorine-containing olefin of the formula E- or Z-R1CH═CHR2, wherein each of R1 and R2 are, perfluoroalkyl groups independently selected from the group consisting of CF3, C2F5, n-C3F7, i-C3F7, n-C4F9, i-C4F9 and t-C4F9, wherein said catalyst is a composition comprising chromium and nickel. 2. The process of claim 1 wherein said catalyst is a composition comprising from about 10% to about 90% chromium and from about 90% to about 10% nickel. 3. The process of claim 1, wherein the catalyst composition further comprises an alkali metal selected from potassium and cesium and rubidium. 4. The process of claim 3, wherein said alkali metal is from 1 to 30 weight percent. 5. The process of claim 1, wherein said catalyst is on a support. 6. The process of claim 5, wherein said support is a metal fluoride, alumina or titania. 7. The process of claim 6, wherein said metal fluoride is a selected from magnesium fluoride, calcium fluoride, strontium fluoride and barium fluoride. 8. A process for the preparation of fluorine-containing alkynes, comprising contacting a chlorofluoroalkene of the formula RfCCI═CCIRf wherein each Rf is a perfluoroalkyl group independently selected from the group consisting of CF3, C2F5, n-C3F7, i-C3F7, n-C4F9, i-C4F9 and t-C4F9 with hydrogen in the presence of a catalyst at a temperature sufficient to cause elimination of the chlorine substituents of the chlorofluoroalkene to produce a fluorine-containing alkyne of the formula R1≡CR2, wherein each of R1 and R2 are, perfluoroalkyl groups independently selected from the group consisting of CF3, C2F5, n-C3F7, i-C3F7, n-C4F9, i-C4F9 and t-C4F9, wherein said catalyst is a composition comprising copper and nickel. 9. The process of claim 8, wherein the catalyst composition further comprises an alkali metal selected from potassium, cesium and rubidium. 10. The process of claim 9, wherein the catalyst composition further comprises chromium. 11. The process of claim 10, wherein said alkali metal is present in from 1 to about 30 weight percent. 12. The process of claim 8, wherein said catalyst is on a support. 13. The process of claim 12, wherein said support is a metal fluoride, alumina or titania. 14. The process of claim 8, wherein the ratio of hydrogen to chlorofluoroalkene is from about 1:1 to about 5:1. 15. The process of claim 8, wherein the process is conducted at a temperature of at least 350° C. 16. The process of claim 1, wherein the product mixture further comprises a chlorofluoroalkene where one of the chlorine atoms has been replaced by hydrogen. 17. The process of claim 1, wherein each Rf is CF3 and the product mixture further comprises E and/or Z-2-chloro-1,1,1,4,4,4-hexafluoro-2-butene. 18. The process of claim 1, wherein each Rf is CF3 and the product mixture further comprises Z-2-chloro-1,1,1,4,4,4-hexafluoro-2-butene. 19. A process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkene having the formula CF3CCI═CCICF3 with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of at least one of the chlorine substituents of the chlorofluoroalkene with hydrogen to produce a product mixture comprising E and/or Z-2-chloro-1,1,1,4,4,4-hexafluoro-2-butene. 20. The process of claim 19, wherein said product mixture further comprises E and/or Z CF3CH═CHCF3.
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이 특허에 인용된 특허 (4)
Webster James L. (Parkersburg WV) Trofimenko Swiatoslaw (Wilmington DE) Resnick Paul R. (Wilmington DE) Bruhnke Douglas W. (Landenberg PA) Lerou Jan J. (Chadds Ford PA) Manogue William H. (Newark DE), Multistep synthesis of hexafluoropropylene.
Lerot Luc (Brussels BEX) Costa Jean-Louis (Brussels BEX) Wilmet Vincent (Louvain-La-Neuve BEX) Pirotton Joseph (Brussels BEX), Process for obtaining catalytic compositions and process for hydrogenation of chlorofluoroalkenes by means of these comp.
Gervasutti Claudio (Mestre ITX) Guglielmo Giorgio (Mirano ITX) Marangoni Luigi (Fiesso D\Artico ITX), Process for the preparation of 1,2-difluoro-ethylene and 1-chloro-1,2-difluoro-ethylene.
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