摘要:
A process for preparing inert or functional, tertiary carbon-containing perfluorochemicals comprises the step of electrochemically fluorinating, in the presence of anhydrous hydrogen fluoride, a composition comprising at least one starting compound selected from the group consisting of those fluoroalkanes, fluoroalkenes, fluoroalcohols, fluorocarboxylic acids, fluorocarboxylic acid halides, fluorocarboxylic acid esters, and combinations thereof which contain at least one (preferably, only one) --CX.sub.2 --C(R.sub.f).sub.2 -- group, wherein each X is independently selected from the group consisting of hydrogen, fluorine, and CH.sub.2 OH, with the proviso that only one X can be CH.sub.2 OH, and each R.sub.f group is independently perfluoroalkyl. The process enables preservation of the highly-branched structure of the starting compounds resulting in high product yields.
摘要:
A process for preparing perfluoroalkanesulfonyl fluorides, e.g., perfluoromethanesulfonyl fluoride, comprises electrochemically fluorinating in the presence of anhydrous hydrogen fluoride at least one precursor compound selected from the group consisting of .alpha.,.beta.-difluoroalkane-.beta.-sultones, e.g., 1,1,2,2-tetrafluoroethane sultone, and the corresponding .alpha.-halocarbonylfluoroalkanesulfonyl halides, e.g., fluorocarbonyldifluoromethanesulfonyl fluoride. The process can be used to prepare perfluoroalkanesulfonyl fluorides in good yield and can be, for example, both more electrically-efficient and more fluorine-efficient than the conventional preparative method involving the electrochemical fluorination of hydrocarbon alkanesulfonyl halides.
摘要:
Perfluoroisobutene-MeOH adduct (2H-octafluororisobutyl methyl ether) is converted to hexafluoropropane by reaction with trialkyl amine (eg. triethyl amine) and H.sub.2 O. 1,1,1,3,3-Pentafluoropropene is also produced in lesser amounts. The electrolysis of the reaction product in anhydrous HF (at 10.degree.-50.degree. C., 0-140 kPa, and 50-300 amps/m.sup.2 anode area) yields C.sub.3 F.sub.8 and some CF.sub.3 CFHCF.sub.3 which is condensed out of a gas stream from the electrolysis cell.
摘要:
A process for preparing fluorocarboxylic acid halides comprises the steps of (a) forming a starting composition comprising (i) at least one fluorosulfonic acid halide comprising at least one halosulfonyldifluoromethyl group (--Cf.sub.2 SO.sub.2 X, wherein X is halogen); and (ii) at least one Group III or Group V Lewis acid; and (b) allowing the fluorosulfonic acid halide and the Lewis acid to react to form a product composition comprising at least one fluorocarboxylic acid halide. The process enables the preparation of even higher molecular weight fluorocarboxylic acid halides in good yield.
摘要翻译:制备氟代羧酸卤化物的方法包括以下步骤:(a)形成起始组合物,其包含(i)至少一种含有至少一个卤代磺酰基二氟甲基(-Cf 2 SO 2 X,其中X为卤素)的氟磺酰卤; 和(ii)至少一种III族或V族路易斯酸; 和(b)使氟磺酰卤和路易斯酸反应以形成包含至少一种氟代羧酸卤化物的产物组合物。 该方法能够以高产率制备更高分子量的氟代羧酸酰卤。
摘要:
The present invention provides a catalytic process for preparing perfluoroethanesulfonyl fluoride and/or perfluorodiethylsulfone using a two-part catalytic process comprising a metal fluoride and a crown ether.
摘要:
A method for removing one or more fluorinated alkenes from a fluid comprises the step of contacting the fluid with an N-, S-, or P-containing nucleophile for a time sufficient to form an N-, S-, or P-containing nucleophile-fluoroalkene adduct. The nucleophile, and therefore the adduct, can be covalently bonded, coated or sorbed to a particulate support which can be enmeshed in a porous, fibrous web. In a preferred embodiment the fluorinated alkene can have the formula wherein A=F or Rf; X=H, F, Cl, Rf, or YRf; Z=H, F, Cl, or Rf; and Y=O, N, or S; with the proviso that at least one A=F, and at most one of Z and X is H; wherein each Rf is independently selected from the group consisting of highly fluorinated or perfluorinated alkyl groups; and a combination of any two Rf groups can be linked to form a cyclic structure. The Rf alkyl chains may contain from 1-20 carbon atoms, with 1-12 carbon atoms preferred. The Rf alkyl chains may be straight, branched, or cyclic. Preferably, Rf is CF3, C2F5, or C3F7.
摘要翻译:从流体中除去一种或多种氟化烯烃的方法包括使流体与含有N-,S-或P的亲核试剂接触足够时间以形成含有N-,S-或P的亲核试剂的步骤 氟烯烃加成物。 亲核试剂,因此加合物可以共价键合,涂覆或吸附到可以嵌入多孔纤维网中的颗粒载体上。 在优选的实施方案中,氟化烯可以具有式F = F或Rf; X = H,F,Cl,Rf或YRf; Z = H,F,Cl或Rf; 和Y = O,N或S; 条件是至少一个A = F,并且Z和X中至多一个是H; 其中每个Rf独立地选自高氟化或全氟化的烷基; 并且可以连接任何两个Rf基团的组合以形成环状结构.Rf烷基链可以含有1-20个碳原子,优选1-12个碳原子。 Rf烷基链可以是直链,支链或环状的。 Rf优选为CF 3,C 2 F 5或C 3 F 7。
摘要:
A method for removing one or more fluorinated alkenes from a fluid comprises the step of contacting the fluid with an N-, S-, or P-containing nucleophile for a time sufficient to form an N-, S-, or P-containing nucleophile-fluoroalkene adduct. The nucleophile, and therefore the adduct, can be covalently bonded, coated or sorbed to a particulate support which can be enmeshed in a porous, fibrous web. In a preferred embodiment the fluorinated alkene can have the formula wherein A=F or Rf; X=H, F, Cl, Rf, or YRf; Z= H, F, Cl, or Rf; and Y=O, N, or S; with the proviso that at least one A=F, and at most one of Z and X is H; wherein each Rf is independently selected from the group consisting of highly fluorinated or perfluorinated alkyl groups; and a combination of any two Rf groups can be linked to form a cyclic structure. The Rf alkyl chains may contain from 1-20 carbon atoms, with 1-12 carbon atoms preferred. The Rf alkyl chains may be straight, branched, or cyclic. Preferably, Rf is CF3, C2F5, or C3F7.
摘要翻译:从流体中除去一种或多种氟化烯烃的方法包括使流体与含有N-,S-或P的亲核试剂接触足够时间以形成含有N-,S-或P的亲核试剂的步骤 氟烯烃加成物。 亲核试剂,因此加合物可以共价键合,涂覆或吸附到可以嵌入多孔纤维网中的颗粒载体上。 在优选的实施方案中,氟化烯可以具有式F = F或Rf; X = H,F,Cl,Rf或YRf; Z = H,F,Cl或Rf; 和Y = O,N或S; 条件是至少一个A = F,并且Z和X中至多一个是H; 其中每个Rf独立地选自高氟化或全氟化的烷基; 并且可以连接任何两个Rf基团的组合以形成环状结构.Rf烷基链可以含有1-20个碳原子,优选1-12个碳原子。 Rf烷基链可以是直链,支链或环状的。 Rf优选为CF 3,C 2 F 5或C 3 F 7。
摘要:
A method for removing one or more fluorinated alkenes from a fluid comprises the step of contacting the fluid with an N-, S-, or P-containing nucleophile for a time sufficient to form an N-, S-, or P-containing nucleophile-fluoroalkene adduct. The nucleophile, and therefore the adduct, can be covalently bonded, coated or sorbed to a particulate support which can be enmeshed in a porous, fibrous web. In a preferred embodiment the fluorinated alkene can have the formula ##STR1## wherein A=F or R.sub.f ; X=H, F, Cl, R.sub.f, or YR.sub.f ; Z=H, F, Cl, or R.sub.f ; and Y=O, N, or S; with the proviso that at least one A=F, and at most one of Z and X is H; wherein each R.sub.f is independently selected from the group consisting of highly fluorinated or perfluorinated alkyl groups; and a combination of any two R.sub.f groups can be linked to form a cyclic structure. The R.sub.f alkyl chains may contain from 1-20 carbon atoms, with 1-12 carbon atoms preferred. The R.sub.f alkyl chains may be straight, branched, or cyclic. Preferably, R.sub.f is CF.sub.3, C.sub.2 F.sub.5, or C.sub.3 F.sub.7.
摘要翻译:从流体中除去一种或多种氟化烯烃的方法包括使流体与含有N-,S-或P的亲核试剂接触足够时间以形成含有N-,S-或P的亲核试剂的步骤 氟烯烃加成物。 亲核试剂,因此加合物可以共价键合,涂覆或吸附到可以嵌入多孔纤维网中的颗粒载体上。 在优选的实施方案中,氟化烯可以具有下式:其中A = F或Rf; X = H,F,Cl,Rf或YRf; Z = H,F,Cl或Rf; 和Y = O,N或S; 条件是至少一个A = F,并且Z和X中至多一个是H; 其中每个Rf独立地选自高氟化或全氟化的烷基; 并且任何两个Rf基团的组合可以连接形成环状结构。 Rf烷基链可以含1-20个碳原子,优选1-12个碳原子。 Rf烷基链可以是直链,支链或环状的。 Rf优选为CF 3,C 2 F 5或C 3 F 7。
摘要:
Described is a reaction of a fluorinated alkoxide with an alkyl fluorovinylalkyl ether, the alkyl fluorovinylalkyl ether having alpha-beta carbon-carbon unsaturation relative to the ether oxygen, to produce a hydrofluoroether.