W. R. Grace Co.

Darrell Edward Hildebrandt

Raymond D Feldwick

An improved method of making binderless zeolite sieve extrudates. After extruding a mixture containing about 40-60% zeolites with the remainder being a metakaolin clay that has mixed with it about 90-120% of the stoichiometric amount of sodium hydroxide to convert the clay to a zeolite, the extruded particles are allowed to dry age under dry, bulk conditions in a container during which time autogeneous heat develops and most of the clay is converted to the zeolite. A further heat treatment in a dilute caustic aqueous solution may be used to insure complete crystallization with subsequent washing and calcination to produce an adsorbent product.

Method of producing binderless zeolite extrudates

A process for preparing alumina-containing nodules characterized with improved mechanical properties which includes mixing powder of alumina, aluminosilicate, or mixtures thereof with an aqueous slurry having a pH in the range from about 7.5 to about 9 and comprising from about 0.2 to about 5 percent by weight of aluminum hydroxide, calculated as alumina, followed by forming, drying and calcining. The products include minor amounts of alumina binder and find use as sorbents, catalysts, and catalyst supports.

Growing community of inventors

Baltimore, MD, United States of America

Darrell Edward Hildebrandt