Patent ID: 8475584
Filing Date: 2013-07-02
Classification: C01B,C01P,C09C,Y10T

Abstract:
1. A method for preparing a zinc clay, comprising: a) adding a slurry of a cation-exchangeable clay having a cation exchange capacity in a range of about 50 milliequivalents per 100 grams of clay to about 150 milliequivalents per 100 grams of clay to a zinc ammonia carbonate complex solution to form a zinc clay suspension, wherein said cation-exchangeable clay is selected from the group consisting of bentonite clays, smectite clays, vermiculite clays and mixtures thereof; calcium montmorillonite, sodium montmorillonite, synthetic vermiculites, and mixtures thereof; b) agitating and then filtering the zinc clay suspension and removing zinc ions with an aqueous composition comprising ammonia and CO c) heating and drying the isolated zinc clay.