Title:
METHOD AND INSTALLATION FOR THE DEHYDROXYLATION TREATMENT OF ALUMINIUM SILICATE
Document Type and Number:
WIPO Patent Application WO2002066376
Kind Code:
A3
Abstract:
The invention relates to a method and installation for the dehydroxylation treatment of aluminium silicate, in which the particles surrounding the aluminium silicate are subjected to a temperature of at least 500 DEG C. The particles are in the form of a dry powder and the dry powder (26) may be optionally transported in a gas stream (30) at a temperature of between 600 and 850 DEG C for a sufficient amount of time until the desired degree of dehydroxylation is achieved. The powder can be obtained from a hydrated base paste by reducing the base paste into fragments (23) and by deagglomerating the base paste fragments mechanically (in 3) in the presence of a hot gas (24) at a temperature of between 500 DEG C and 800 DEG C in order to form the dry powder (26).
Inventors:
CADORET GAEL (FR)
Application Number:
PCT/FR2002/000456
Publication Date:
November 28, 2002
Filing Date:
February 06, 2002
Export Citation:
Assignee:
SAINT GOBAIN MAT CONSTR SAS (FR)
CADORET GAEL (FR)
CADORET GAEL (FR)
International Classes:
B01J6/00; C01B33/40; C04B14/10; F26B17/10; (IPC1-7): C01B33/40; B01J6/00; F26B17/10; C04B14/10
Domestic Patent References:
| WO1990005586A1 | 1990-05-31 |
Foreign References:
| GB663371A | 1951-12-19 | |||
| GB1164314A | 1969-09-17 | |||
| GB646732A | 1950-11-29 | |||
| US2535570A | 1950-12-26 | |||
| GB2247306A | 1992-02-26 | |||
| US4962279A | 1990-10-09 | |||
| US5792251A | 1998-08-11 |
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