Toxic gas absorbent and processes for making same

Details Toxic gas absorbent and processes for making same Toxic gas absorbent and processes for making same

1987-02-03

1988-01-26

Thexton, Matthew A.

Compositions

Co, s, negative element, or acid, bindant containing

252378P, 252378R, 502410, 502515, 502517, C09K 300, B01J 2004

Patent

active

047215828

ABSTRACT:
Solid sorbents (acceptors) for noxious components, e.g. SO.sub.x, NO.sub.x and HX, from gases below about 250.degree., specifically acceptors that contain hydrated divalent metal oxide coated onto an exfoliated or expanded mineral support, are improved by heating them before use at a temperature of 450.degree.-650.degree. for a conditioning period of at least a few minutes. So conditioned pulverulent MgO coated onto water-laden exfoliated vermiculite (alternatively expanded perlite) is preferred because of capacity and the ability of the magnesia-based acceptors to be regenerated at a moderately elevated temperature that precludes substantial deterioration of acceptor or equipment. To insure immediate activity the conditioned acceptor is moistened for use. Advantageously the gas and/or the acceptor is humidified during their contact.

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