Process for preparing a metal hydroxide
AssigneeNederlandse Organisatie voor toegepast-natuurweten schappelijk onderzoek TNO
InventorJan Peter Brouwer
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Abstract
The invention provides a process for preparing a metal hydroxide comprising the steps of: (a) providing particles of a metal silicate; (b) mixing the particles with a mineral acid solution to obtain a slurry which comprises precipitated silica; (c) separating the precipitated silica from the slurry to obtain a remaining solution; (d) increasing the pH of the remaining solution to such an extent that a metal hydroxide is formed; (e) separating the metal hydroxide so obtained from the remaining solution; and (f) adding to the remaining solution obtained in step (e) an acid solution, thereby forming a salt containing solution, or (g) removing at least part of the base added in step (d) from the remaining solution obtained in step (e), thereby forming a salt containing solution.
Claims17
A process for preparing a metal hydroxide comprising the steps of:
- (a) providing particles of a metal silicate;
- (b) mixing the particles with a mineral acid solution to obtain a slurry which comprises precipitated silica;
- (c) separating the precipitated silica from the slurry to obtain a remaining solution;
- (d) increasing the pH of the remaining solution to such an extent that a metal hydroxide is formed;
- (e) separating the metal hydroxide so obtained from the remaining solution;
- and
- (f) adding to the remaining solution obtained in step (e) an acid solution, thereby forming a salt containing solution, or
- (g) removing at least part of the base added in step (d) from the remaining solution obtained in step (e), thereby forming a salt containing solution.
Dependencies are inferred from the claim text.