Process for bleaching and increasing the ion-exchange capability

Details Process for bleaching and increasing the ion-exchange capability Process for bleaching and increasing the ion-exchange capability

1988-07-01

1991-09-24

Kyle, Deborah L.

Compositions

Absorptive, or bindive, and chemically yieldive

502 11, 502 12, 502 80, 502 84, B01J 3730

Patent

active

050512021

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+.

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patent: 4285832 (1981-08-01), Orth, Jr.
patent: 4542002 (1985-09-01), Corma et al.
patent: 4740488 (1988-04-01), Fogler et al.

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