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.
Formation Of Alumina-Containing Particles With Aluminum Hydroxide Binder
Raymond Douglas Feldwick - Cockeysville MD Darrell Edward Hildebrandt - Baltimore MD
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
B01J 2906 B01J 2308
US Classification:
252455R
Abstract:
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.
Darrell Hildebrandt 1979 graduate of Scarborough High School in Houston, TX is on Classmates.com. See pictures, plan your class reunion and get caught up with Darrell and other high school alumni
D ngela Cartwright (1994-2000), Louis Kenjura Iii (1989-1994), Edelmarc Pamonag (1995-1999), Darrell Hildebrandt (1975-1979), Victor Velasquez (1984-1988)