Patent ID: 6034290
Filing Date: 2000-03-07
Classification: B01J,C07C,Y02P

Abstract:
A process for the isomerization of 1,4-dichlorobutene-2 to 3,4-dichlorobutene-1, comprising: contacting 1,4-dichlorobutene-2 with a catalytic amount of a porous microcomposite which comprises a perfluorinated ion-exchange polymer containing pendant metal cation exchanged sulfonate groups, metal cation exchanged carboxylate groups, or metal cation exchanged sulfonate and carboxylate groups, wherein the metal cation may be ligand coordinated, and optionally pendant sulfonic acid groups, carboxylic acid groups, or sulfonic acid and carboxylic acid groups, entrapped within and highly dispersed throughout a network of metal oxide, a network of silica, or a network of metal oxide and silica, wherein the weight percentage of perfluorinated ion-exchange polymer in the microcomposite is from about 0.1 to about 90 percent, wherein the size of a first set of pores in the microcomposite is about 0.5 nm to about 75 nm, and wherein the microcomposite optionally further comprises a second set of pores having a size in the range of about 75 nm to about 1000 nm, in a solvent, or without solvent, under an inert atmosphere at a temperature ranging from about 80.degree. C. to about 180.degree. C.; and recovering the 3,4-dichlorobutene-1.