Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1995-09-27
1999-09-21
Bos, Steve
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
4234202, 423593, 423600, 423463, 423395, 423518, 423367, C01B 2526, C01B 3130, C01B 2148, C01F 702
Patent
active
059550481
ABSTRACT:
There is provided a flash activated hydrotalcite which, when extruded to sizes of about 1/16 inch or more, has a crush load strength of at least about 7 pounds. The process for making this extrudate includes: (a) providing a hydrotalcite compound; (b) heating said compound for less than two seconds to one or more temperatures above about 482.degree. C. (900.degree. F.); (c) cooling said heated compound; (d) collecting said cooled compound; (e) forming said compound into an extrudate; and (f) reactivating said extrudate by heating to one or more temperatures above about 400.degree. C. (752.degree. F.) for about 20 minutes or more. Further strength improvements are achieved by exposing these extrudates to steam for at least about 8 hours prior to step (f).
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Cedro, III Vito
Richardson James H.
Stinson, Jr. John M.
Weaver Mark L.
Aluminum Company of America
Bos Steve
Topolosky Gary P.
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