Krespan Carl G. (Wilmington DE) Petrov Viacheslav A. (Wilmington DE) Smart Bruce E. (Wilmington DE)
출원인 / 주소
E. I. Du Pont de Nemours and Company (Wilmington DE 02)
인용정보
피인용 횟수 :
14인용 특허 :
0
초록▼
A process is disclosed for producing a saturated gem-dichloro chlorofluorocarbon product of the formula CnClaFb, wherein n is 2 to 12, a is 2 to 4, and b is 4 to 24, and wherein a+b equals 2n+2 when the chlorofluorocarbon is acyclic and equals 2n when the chlorofluorocarbon is cyclic, from a startin
A process is disclosed for producing a saturated gem-dichloro chlorofluorocarbon product of the formula CnClaFb, wherein n is 2 to 12, a is 2 to 4, and b is 4 to 24, and wherein a+b equals 2n+2 when the chlorofluorocarbon is acyclic and equals 2n when the chlorofluorocarbon is cyclic, from a starting material of the same formula which has a lesser thermodynamic stability than the saturated gem-dichloro chlorofluorocarbon product. The process involves isomerizing the starting material in the presence of (1) a catalyst of the formula AlZ3, where Z is selected from F, Cl and/or Br (provided that AlZ3 cannot be entirely AlF3) and (2) an effective amount of promoter selected from the group consisting of is selected from hexafluoropropene, 2-chloropentafluoropropene, perfluorobutenes, perfluoropentenes, perfluorocyclobutene, 1-chlorocyclobutene, 1,2-dichlorocyclobutene, perfluorocyclopentene, 1-chlorocyclopentene, and 1,2-dichlorocyclopentene, and mixtures thereof, to accelerate production of the saturated gem-dichloro chlorofluorocarbon product. Also disclosed is a process for producing a halohydrocarbon of the formula CnHcCldFb from a gem-dichloro product produced by said isomerization (where c is 1 to 4 and c+equals a) which involves hydrodechlorinating the gem-dichloro product.
대표청구항▼
A process for producing a saturated gem-dichloro chlorofluorocarbon product of the formula CnClaFb, wherein n is an integer from 2 to 12, a is an integer from 2 to 4 and b is an integer from 4 to 24, and wherein a+b equals 2n+2 when the chlorofluorocarbon is acyclic and equals 2n when the chlorofluo
A process for producing a saturated gem-dichloro chlorofluorocarbon product of the formula CnClaFb, wherein n is an integer from 2 to 12, a is an integer from 2 to 4 and b is an integer from 4 to 24, and wherein a+b equals 2n+2 when the chlorofluorocarbon is acyclic and equals 2n when the chlorofluorocarbon is cyclic, from a starting material of the same formula which has a lesser thermodynamic stability than said gem-dichloro chlorofluorocarbon product, comprising: isomerizing said starting material in the presence of (1) a catalyst of the formula AlZ3, where Z is selected from the group consisting of F, Cl, Br and mixtures thereof, provided that the AlZ3 is not entirely Al3, and (2) an effective amount of promoter selected from the group consisting of hexafluoropropene, 2-chloropentafluoropropene, perfluorobutenes, perfluoropentenes, perfluorocyclobutene, 1-chlorocyclobutene, 1,2-dichlorocyclobutene, perfluorocyclopentene, 1-chlorocyclopentene, and 1,2-dichlorocyclopentene, and mixtures thereof, to accelerate production of said saturated gem-dichloro chlorofluorocarbon product.
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이 특허를 인용한 특허 (14)
Krespan Carl George ; Petrov Viacheslav Alexandrovich, Addition of trifluoromethanes to fluoroolefins and isomerization of monohaloperfluoro alkanes.
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