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    • 5. 发明授权
    • Process for producing amorphous aluminosilicates
    • 无定形硅铝酸盐的制备方法
    • US4929431A
    • 1990-05-29
    • US83710
    • 1987-08-10
    • Zenji HagiwaraSatoshi AndoSaburo Nohara
    • Zenji HagiwaraSatoshi AndoSaburo Nohara
    • C01B33/26A01N25/08A01N59/06A01N59/16A01N59/18A01N59/20B01J39/14C01B33/46C01B39/46C08K3/34C09C1/40
    • B82Y30/00A01N59/16A01N59/18A01N59/20C01B33/28C08K3/34C09C1/405C01P2002/02C01P2002/72C01P2004/03C01P2004/50C01P2004/61C01P2004/62C01P2004/64C01P2006/12C01P2006/32
    • There is disclosed a process for producing an amorphous aluminosilicate having the formula:2Na.sub.x O.Al.sub.2 O.sub.3.ySiO.sub.2(wherein x is a number between 0.6 and 1.8 inclusive; and y is a number between 1.3 and 7 inclusive); which comprises:a step of maintaining an alkali solution (Solution-C), the alkalinity of which is within the range of 1.2-3.5N under stirring;a step of adding a sodium aluminate solution (Solution-A) containing free alkali and sodium silicate solution or colloidal silica solution (Solution-B) containing free alkali to the Solution-C, separately to prepare a slurry which contains an amorphous sodium aluminosilicate in the form of finely divided particles which are only slightly soluble in water; anda step of aging the slurry, characterized in that the addition of Solution-A and Solution-B into Solution-C is carried out so that the Si/Al ratio in the resultant mixture is kept within the range of 0.7 to 7.6 during and after the addition, and mixing effected at 55.degree. C. or lower, and Solution-A and Solution-B are prepared so that both the alkalinity of the aqueous solution phase during the formation of the slurry and during the maturing is kept within .+-.0.30N of the alkalinity of Solution-C.
    • 公开了一种用于制备具有下式的无定形硅铝酸盐的方法:其中x是包括0.6和1.8之间的数字; y是包括1.3和7之间的数字); 其包括:在搅拌下将其碱度处于1.2-3.5N范围内的碱溶液(溶液C)的保持步骤; 将含有游离碱和硅酸钠溶液的铝酸钠溶液(溶液A)或含有游离碱的胶体二氧化硅溶液(溶液B)分别加入到溶液C中以制备含有无定形硅铝酸钠的浆料的步骤 仅微溶于水的微细颗粒的形式; 以及使浆料老化的步骤,其特征在于将溶液-A和溶液-B加入到溶液C中,使得所得混合物中的Si / Al比保持在0.7至7.6的范围内, 加入后,在55℃以下进行混合,制备溶液A和溶液-B,使浆料形成期间和成熟期间的水溶液相的碱度保持在+ -0.30N的溶液C的碱度。