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    • 1. 发明授权
    • Process for the preparation of crystalline, alkaline, aluminosilicate
    • 制备结晶,碱性,硅铝酸盐的方法
    • US4263266A
    • 1981-04-21
    • US86128
    • 1979-10-18
    • Max MichelGeorges VrisakisLaurent SeigneurinGilbert Bouge
    • Max MichelGeorges VrisakisLaurent SeigneurinGilbert Bouge
    • C01B39/02C01B39/16C11D3/12C01B33/28
    • C11D3/128C01B33/2815Y10S423/24
    • A crystalline, alkali metal aluminosilicate of type 4A is prepared by reaction between an aqueous solution of an alkali metal silicate and an aqueous solution of an alkali metal aluminate, and includes the steps of (i) introducing a flow of at least a portion of at least one of said reactant solutions into a reaction zone; (ii) co-introducing with said flow (i) an in line flow of at least a portion of the other reactant solution into said reaction zone; (iii) thus establishing in said reaction zone a liquid mixture of said aqueous reactant solutions and said liquid admixture comprising a gel-formation medium; (iv) establishing gel-formation elevated temperatures within said gel-formation medium to effect formation of a mixture comprising an aluminosilicate gel-phase and a mother liquid; (v) recycling said gel-phase/mother liquor to said flow (i); (vi) maintaining said gel-phase comprising said gel-formation medium under such elevated temperatures for such period of time as to effect crystallization of the aluminosilicate, and whereby a suspension of aluminosilicate crystals of type 4A in liquid phase results; and (vii) thence recovering said aluminosilicate crystals from said resulting liquid phase.The resultant aluminosilicate crystals are useful, e.g., detergent additives.
    • 通过碱金属硅酸盐的水溶液和碱金属铝酸盐的水溶液之间的反应制备4A型结晶的碱金属硅铝酸盐,并且包括以下步骤:(i)引入至少一部分在 所述反应物溶液中的至少一种进入反应区; (ii)与所述流(i)共同引入至少一部分其它反应物溶液的入口流入所述反应区; (iii)因此在所述反应区域中建立所述反应物水溶液和所述液体混合物的液体混合物,其包含凝胶形成介质; (iv)在所述凝胶形成介质内建立凝胶形成升高的温度以形成包含硅铝酸盐凝胶相和母液的混合物; (v)将所述凝胶相/母液再循环至所述流(i); (vi)将所述凝胶形成介质的所述凝胶相在这样升高的温度下保持一段时间,以使铝硅酸盐发生结晶,由此产生液相中的4A型硅铝酸盐晶体的悬浮液; 和(vii)从所述液相中回收所述硅铝酸盐晶体。 所得的铝硅酸盐晶体是有用的,例如洗涤剂添加剂。