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US 2024/0158244 A1Published application
Process for the preparation of silicate from a plant ash comprising crystalline silica using a salt containing a multivalent anion
AssigneeRhodia Operations
InventorsFrançois Payan, Youssef Chkounda
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Abstract
The invention relates to a process for producing a silicate from a plant ash comprising crystalline silica. The process comprises reacting said plant ash with a base in the presence of an additive which is a salt comprising a multivalent anion. The invention also relates to a silicate obtainable from said process and to a process for preparing a precipitated silica from said silicate. The invention also concerns a reaction mixture which can be used for said processes.
Claims20
A process for producing a silicate from a plant ash, wherein the process comprises a step (a) of reacting:
- (i) a plant ash obtained from a combustion of a silica-containing plant part and/or plant, wherein said plant ash comprises crystalline silica;
- with
- (ii) a base;
- wherein the reaction of step (a) is carried out in a reaction mixture comprising a dispersing medium and an additive, wherein said additive is a salt comprising a multivalent anion.
1 more element
Dependencies are inferred from the claim text.