Catalyst pellets with resin binder for decomposition of hypochlorite

Abstract

A porous catalyst matrix used for the decomposition of aqueous hypochlorite solutions is disclosed along with the process for its use. The catalyst is prepared by sintering a powdered mixture of a particular metal oxide or hydroxide and a thermoplastic polyolefin or halogenated polyolefin.

What is claimed is: 
     
       1. A porous catalyst matrix .[.in pellet form.]. consisting essentially of a mixture of a powdered oxide or hydroxide of a metal selected from the group consisting of iron, copper, magnesium, nickel and cobalt, and a powdered thermoplastic organic resin .[.comprising polyvinylidene fluoride.]. .Iadd.selected from the group consisting essentially of solid polyolefins and halogenated polyolefins and mixtures thereof .Iaddend.in a weight ratio of oxide or hydroxide of metal to resin within .[.1:1 to 15:1.]. .Iadd.100:1 to 1:10.Iaddend., which mixture of powders has been compacted into pellets and then thermally sintered at or about the softening temperature of the resin, thereby forming a porous .[.ctalyst.]. .Iadd.catalyst .Iaddend.matrix .[.in pellet form.]. which is stable in aqueous hypochlorite solutions. 
     
     
       2. The porous catalyst matrix .[.in pellet form.]. of claim 1 .Iadd.in pellet form .Iaddend.in which the pellet size is about one-eight of an inch in diameter and three-sixteenths of an inch in length. 
     
     
       3. The porous catalyst matrix of claim .[.1.]. .Iadd.2 .Iaddend.in which the pellets have been crushed and screened to a particle size of 18 to 35 mesh. .Iadd. 
     
     
       4.  The porous catalyst matrix of claim 1 in which the powdered thermoplastic solid organic resin is selected from the group consisting essentially of polyvinylidene fluoride, polyethylene, polypropylene, polytetrafluoroethylene, and mixtures thereof. .Iaddend. .Iadd.5. The porous catalyst matrix of claim 4 wherein the powdered oxide or hydroxide of said metal is supported with a catalyst support material selected from the group of materials consisting essentially of silica, diatomaceous earth, alkaline earth metal and alkali metal silicates; aluminas; silicates and mixed aluminum compounds of oxides, hydroxides and silicates; magnesia and mixed magnesium compounds of oxides, hydroxides, silicates and mixtures thereof. .Iaddend.