The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 1994
Filed:
Dec. 04, 1992
Mitsuru Suda, Saitama, JP;
Kunio Ohtsuka, Saitama, JP;
Mitsubishi Material Corporation, Tokyo, JP;
Abstract
A laminar clay having ion-exchange property is mixed with a solution containing polynuclear metal hydroxo cations or positively charged hydroxide or oxide fine particles to serve as precursor ions (3) of inorganic pillars so as to exchange a part of cations (2) between clay layers (1) with the precursor ions (3) of the inorganic pillars. Next, the laminar clay thus obtained is heat-treated at 100.degree. to 900.degree. C. to generate a porous clay intercalation compound, this porous clay intercalation compound is mixed with an ammonium salt aqueous solution to ion-exchange remaining cations (2) with ammonium ions (5). This porous clay intercalation compound is heat treated again at 200.degree. to 900.degree. C. to desorb ammonia, so as to allow hydrogen ions (6) to be carried in the pore portions of the porous clay intercalation compound and on its surface portions. The porous clay intercalation compound thus obtained has both a shape selectivity function owing to its uniform pore structure and high catalytic activity owing to the hydrogen ions (6).