【発明の名称】アルミナおよびシリカの回収方法

Japanese Patent JP2000505034

A

PCT No. PCT/IL96/00179 Sec. 371 Date Dec. 15, 1998 Sec. 102(e) Date Dec. 15, 1998 PCT Filed Dec. 12, 1996 PCT Pub. No. WO97/22554 PCT Pub. Date Jun. 26, 1997A process for the simultaneous recovery of substantially pure alumina and silica from an aluminosilicate. The process comprises the following steps: (i) heating the aluminosilicate with hydrated CaCl2 to obtain calcium-alumino-silicate and calcium-aluminate products, wherein the CaCl2 is substantially free of MgCl2; (ii) leaching the products with HCl to form a solution comprising AlCl3 and CaCl2, and insoluble silica; (iii) separating the insoluble silica from the solution; and (iv) crystallizing AlCl3 from the solution and recovering the alumina from the crystallized AlCl3. The process may further comprise the following steps: (v) substantially removing MgCl2 from the CaCl2 solution of step (iv); and (vi) recycling the CaCl2 solution for use in step (i).

JPH0631173	[Title of the Invention] A method for producing a porous silica carrier.
JPH0724749	INDUSTRIAL APPLICABILITY: A method for producing a spherical agglutination by selective agglutination.
JP2005089761	COMPOSITION FOR FORMING SILICA BASED COATING FILM, SILICA BASED COATING FILM AND ITS FORMATION METHOD, AND ELECTRONIC COMPONENT COMPRISING SILICA BASED COATING FILM

Nehari, Shuromo
Gorin, Shanok
Lynn, Israel Jay
Berkovik, Amos

JP52263997A

April 25, 2000

December 12, 1996

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Machal Alumina Industries Limited

C01B33/12; C01F7/22; C01F7/306; C01B33/187; (IPC1-7): C01F7/22; C01B33/187; C01F7/30

Sota Asahina (1 person outside)

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