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. 23, 1976
Filed:
Feb. 10, 1975
Jacques Maurice Andre, Brussels, BE;
Raymond Marc Cahen, Brussels, BE;
Henri Robert Debus, Meise, BE;
Rene Odon Lammers, Brussels, BE;
Hugo Johannes Van Thillo, Grimbergen, BE;
Labofina S.A., Brussels, BE;
Abstract
A process for preparing spheroidal silica-alumina particles containing alumina in an amount at least equal to that of silica, comprising dispersing as droplets into a hot and practically water-immiscible fluid, an aqueous mixture comprising an alkali silicate, alumina hydrogel, perchloric acid and a water-soluble monomer whose uncross-linked polymer is water-soluble or forms a gel, alkali silicate and alumina hydrogel being used in proportions corresponding to 0.5 to 50% by weight of SiO.sub.2 and 99.5 to 50% by weight of Al.sub.2 O.sub.3, and maintaining the droplets of the mixture in the fluid until a substantial polymerization of the monomer occurs.