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:
Sep. 24, 1991
Filed:
Jul. 01, 1988
Applicant:
Inventors:
Antonio A Berenguer, Madrid, ES;
Carlos B Martin, Madrid, ES;
Assignee:
Tolsa, S.A., Madrid, ES;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
252184 ; 502 11 ; 502 12 ; 502 80 ; 502 84 ;
Abstract
The present invention refers to a process for bleaching and increasing the ion-exchange capability of the sepiolite mineral, basically consisting of treating, at high pH and temperature, the sepiolite with a basic salt solution, which results in bleaching the starting material by dissolution of the organic material present in it, and in increasing the ion-exchange capability by a structural transformation of sepiolite. The bleaching can be optionally completed with a reduction treatment with sodium dithionite or with other reducing agents capable of reducing Fe.sup.3+ to Fe.sup.2+.