Patent ID: 8153096
Filing Date: 2012-04-10
Classification: C08K

Abstract:
1. A method for preparing a hydrogen fluoride composition comprising: (a) providing a cross-linked copolymer comprising acrylamide units and acrylic acid salt units; and (b) contacting said cross-linked copolymer with anhydrous hydrogen fluoride to form a composition in the form of a solid or a gel wherein the composition comprises: hydrogen fluoride in an amount of from about 80 weight percent of the composition to about 98 weight percent of the composition; and the cross-linked copolymer in an amount from about 0.5 weight percent of the composition to about 20 weight percent of the composition, the cross-linked copolymer comprising acrylamide units cross-linked with the acrylic acid salt units, wherein said acrylic acid salt is selected from the group consisting of potassium acrylate, sodium acrylate, and ammonium acrylate, wherein said cross-linked copolymer has an average liquid hydrogen fluoride adsorption capacity of at least about 45.2 grams of HF per gram of the cross-linked copolymer.