Shell Oil Comapny

Richard A Geiman

Charles T Adams

Lawrence Walker Maas

A process is disclosed for removing color or color inducing impurities to petroleum derived wax by means of an adsorbent comprising a refined inorganic oxide having a pore distribution such that at least 60% of the pores possess a size of less than 350 Angstroms. Preferably, at least 90% of the pores possess a size of less than 350 Angstroms. The preferred inorganic oxide is an aluminum oxide and preferably has a surface area between 200 square meters per gram and 500 square meters per gram. A process is also disclosed for wax finishing utilizing multiple beds of refined alumina which may be operated in a swing bed fashion to intimately regenerate the refined alumina absorbent by such procedural steps as naphtha soaking, steam treating and heating in air.

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Houston, TX, United States of America

Richard A Geiman