Process for preparing peroxides
AssigneeE. I. Du Pont de Nemours and Company
InventorsGeorge Francis Diffendall, Thomas William Harding, Joseph Norman Hockman, Carl George Krespan, Matthew John Targett, Robert Clayton Wheland
Life of this patent
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Abstract
A process for the faster manufacturing of hydrocarbon, fluorocarbon and chlorocarbon acyl peroxides is disclosed wherein a hydroxide, a peroxide and an acyl halide are reacted under continuous vigorous agitation conditions so as to bring the reaction to substantial completion is less than one minute.
Claims39
In a continuous process for producing acyl peroxides wherein the reaction occurs in a reaction vessel which is connected to a transfer line, comprising the steps of contacting an aqueous hydroxide and a peroxide with an acyl halide wherein the acyl halide is selected from the group consisting of R(C.dbd.O)X and RO(C.dbd.O)X in which X is --Cl, --F, --Br and --I and R is selected from the group consisting of
- (i) a linear or branched alkyl group of the structure C.sub.n F.sub.x Cl.sub.y H.sub.z --, wherein x+y+z=2n+1, n is 1 to 8 and wherein the carbon bearing a --(C.dbd.O)X group is primary;
- (ii) G(CF.sub.2).sub.w CF(CF.sub.3)CF.sub.2 !.sub.x OCF(CF.sub.3)CF.sub.2 !.sub.y OCF(CF.sub.3)!.sub.z -- where w is 0 to 8
- x is 0 or 1;
- y is 0 to 7;
- z is 0 to 1;
- and
- w+x+y+z.gtoreq.1
- and G is selected from the group consisting of --F, --COOCH.sub.3, --SO.sub.2 F, --H, --Br, --Cl, --I, --CN, --OC.sub.6 F.sub.5, provided that when G is --OC.sub.6 F.sub.5 either x or w is 1;
- and
- (iii) an aromatic, hydro, chloro or perfluoro carbon compound having one or more functional groups selected from the group consisting of --F, --COOCH.sub.3, --SO.sub.2 F, --H, --Br, --CFBrCF.sub.2 Br, --Cl, --I, --CN, --OC.sub.6 F.sub.5 ;
- wherein the improvement comprises combining specific reaction vessel configurations with means for supplying vigorous agitation selected from the group consisting of jet, static, ultrasonic and mechanical mixers, arranged singly or in series and wherein the agitation provided by the means for supplying vigorous agitation is at least partially maintained by flow through both the reactor and the transfer line so as to decrease reaction time to 1 minute, provided that at least 10% of the reaction occurs in the transfer line.
In a batch process for producing acyl peroxides comprising the steps of contacting an aqueous peroxide with a peroxide and an acyl halide, wherein the acyl halide is selected from the group consisting of R(C.dbd.O)X and RO(C.dbd.O)X in which X is --Cl, --F, --Br and --I and R is selected from the group consisting of
- (i) a linear or branched alkyl group of the structure C.sub.n F.sub.x Cl.sub.y H.sub.z --, wherein x+y+z=2n+1, n is 1 to 8 and wherein the carbon bearing a --(C.dbd.O)X group is primary;
- (ii) G(CF.sub.2).sub.w CF(CF.sub.3)CF.sub.2 !.sub.x OCF(CF.sub.3)CF.sub.2 !.sub.y OCF(CF.sub.3)!.sub.z -- where w is 0 to 8
- x is 0 or 1;
- y is 0 to 7,
- z is 0 to 1;
- and
- w+x+y+z.gtoreq.1
- and G is selected from the group consisting of --F, --COOCH.sub.3, --SO.sub.2 F, --H, --Br, --Cl, --I, --CN, --OC.sub.6 F.sub.5, provided that when G is --OC.sub.6 F.sub.5 either x or w is 1, and
- (iii) an aromatic, hydro, chloro or perfluoro carbon compound having one or more functional groups selected from the group consisting of --F, --COOCH.sub.3, --SO.sub.2 F, --H, --Br, --CFBrCF.sub.2 Br, --Cl, --I, --CN, --OC.sub.6 F.sub.5 ;
- wherein the improvement comprises continuously agitating the reactants, using agitation means, until substantial completion of the reaction, wherein the reaction is substantially complete in less than one minute.
Dependencies are inferred from the claim text.