Inhibition of 141b decomposition
AssigneeElf Atochem North America, Inc.
InventorsRichard M. Crooker, Maher Y. Elsheikh, Anthony D. Kelton, Morris P. Walker, Danny W. Wright
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Abstract
Inhibition of the formation of unsaturated carbon compounds during the heating of 141b involving the addition of various inhibitors such as dialkylhydroxylamine and/or the use of a vessel made of a nickel alloy.
Claims4
A method for inhibiting the formation of vinylidene chloride during the heating of 1,1-dichloro-1-fluoroethane, which method comprises heating 1,1-dichloro-1-fluoroethane in the presence of an effective amount of an inhibitor which is a dialkylhydroxylamine wherein the alkyl groups have 1 to 4 carbons, an epoxide having 3-6 or 10-30 carbons, an organic compound having at least 2 double bonds and a boiling point greater than that of the 1,1-dichloro-1-fluoroethane, a phenol, or a 1,4-benzoquinone.
A method of inhibiting the formation of vinylidene chloride during the heating of 1,1-dichloro-1-fluoroethane, which method comprises heating 1,1-dichloro-1-fluoroethane in the presence of an effective amount of an inhibitor selected from the group consisting of a dialkylhydroxylamine wherein the alkyl groups have 1 to 4 carbons, butylene oxide, and an organic compound having at least 2 double bonds and a boiling point greater than that of the 1,1-dichloro-1-fluoroethane.
In a process for separating 1,1-dichloro-1-fluoroethane from a liquid mixture containing 1,1,1,2-tetrachloroethane in a distillation column, the improvement which comprises adding to the bottom section of said column an inhibitor selected from the group consisting of a dialkylhydroxylamine wherein the alkyl groups have 1 to 4 carbons, an epoxide having 3-6 or 10-30 carbons, an organic compound having at least 2 double bonds and a boiling point greater than that of the 1,1-dichloro-1-fluoroethane, a phenol and a 1,4-benzoquinone, said inhibitor being added in an amount effective to inhibit formation of vinylidene chloride during the separation process.
In a process for separating 1,1-dichloro-1-fluoroethane from a liquid mixture containing 1,1,1,2-tetrachloroethane in a distillation column, the improvement which comprises adding to the bottom section of said column an inhibitor selected from the group consisting of a dialkylhydroxylamine wherein the alkyl groups have 1 to 4 carbons, butylene oxide, and an organic compound having 2 double bonds and a boiling point greater than that of the 1,1-dichloro-1-fluoroethane, said inhibitor being added in an amount effective to inhibit formation of vinylidene chloride during the separation process.
Dependencies are inferred from the claim text.