clay refining

clay refining

[′klā rə′fin·iŋ]
(chemical engineering)
A treating process for vaporized gasoline or other light petroleum product; the material is passed through a bed of granular clay, and certain olefins are polymerized to gums and absorbed by the clay.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Zisha clay excavated from the mine should be processed through various steps such as weathering, tedding and purification, proportioning, pulverising, staleness and clay refining. Meanwhile, Zisha clay cannot be used as the raw material of teapots until it has been kept for at least six months after passing certain tests.