Method for the neutralization of an A-zeolite filter cake.

摘要

57 The filter press cake, obtained by separation of the raw Zeolite from the major portion of the mother liquor and not washed, or only partially washed, is additivated with a suitable surface-active agent, added in the amount of from 1 to 2% in weight on the weight of the wet Zeolite. The thus- fluidized Zeolite is treated in a high-turbulence zone with sulphunc acid at a concentration greater than 70%, which is added in such an amount as to produce a nearly complete neutralization of the final Zeolite.