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:
Feb. 12, 1985
Filed:
May. 27, 1983
Peter Christophliemk, Dusseldorf, DE;
Rudolf Novotny, Dusseldorf, DE;
Jurgen von Laufenberg, Haan, DE;
Josef Sadlowsky, Dusseldorf, DE;
Henkel Kommanditgesellschaft auf Aktien, Duesseldorf, DE;
Abstract
A process for the hydrothermal fusion of aluminum silicate and alkali aluminum silicates with aqueous sodium hydroxide solution under pressure and at elevated temperatures in the presence of soluble silicates, in which an aqueous solution containing from about 20 to about 50% by weight of NaOH is mixed with aluminum silicates and/or alkali aluminum silicates, and with a hydrothermally fusible silicate component, wherein the ratio by weight of SiO.sub.2 to Al.sub.2 O.sub.3 in the mixture amounts to at least 30:1 and the ratio by weight of SiO.sub.2 to Na.sub.2 O amounts to at least 1.5:1, and the mixtures are reacted at temperatures of from about 180.degree. to about 250.degree. C. and under the saturated steam pressures corresponding to those temperatures. The resulting sodium silicate solution, which contains the dissolved aluminum, is then separated off.