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:
Mar. 25, 1986
Filed:
Jan. 02, 1985
Applicant:
Inventor:
Hans-Peter Rieck, Hofheim am Taunus, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423325 ; 423326 ; 423327 ; 423328 ; 423329 ; 423330 ; 423332 ; 423333 ;
Abstract
A process for the preparation of a crystalline sheet-type alkali metal silicate in an aqueous medium is described, in which an acidic compound is added to an amorphous alkali metal silicate, or an alkali metal silicate dissolved in water, having a molar ratio M.sub.2 O/SiO.sub.2 (M=alkali metal) of 0.24 to 2.0, in an amount such that a molar ratio M.sub.2 O (unneutralized)/SiO.sub.2 of 0.05 to 0.239 is obtained. If required, the molar ratio SiO.sub.2 /H.sub.2 O is adjusted from 1:5 to 1:100 by dilution, and the reaction mixture is kept at a reaction temperature of 70.degree. to 250.degree. C. until the sheet-type alkali metal silicate has crystallized out.