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:
Jun. 20, 2023
Filed:
Jan. 25, 2022
Pq Silica Brazil Ltda., São Paulo, BR;
Joris Antonius van der Eerden, Eben-Emael, BE;
Flavio Ernesto Ribeiro, Plainfield, IL (US);
Ronaldo dos Santos Flor, São bernardo do Campo, BR;
Other;
Abstract
The present invention refers to a stable sodium and iron silicate solution that has a weight ratio of SiOto NaO from 1.5 to 2.5 and a total percentage of solids, expressed by the sum of SiOand NaO, from 20% to 55%. Said solution also has a soluble iron content, expressed by Fe, from 0.1% to 7%, and a water content from 38% to 79.9%. The present invention also refers to the process for preparing said stable solution of sodium and iron silicate, which comprises the steps of: (a) providing a siliceous material containing iron; (b) submitting said siliceous material containing iron to a hydrothermal treatment with caustic soda under high temperature and controlled pressure; and (c) filtering said reacted solution to separate the reacted portion of the hydrothermal treatment from the unreacted portion. Additionally, the present invention refers to the uses of said stable sodium and iron silicate solution.