发明名称 |
Process for producing amorphous aluminosilicates |
摘要 |
There is disclosed a process for producing an amorphous aluminosilicate having the formula: 2NaxO.Al2O3.ySiO2 (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; and a 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 DEG 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.
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申请公布号 |
US4929431(A) |
申请公布日期 |
1990.05.29 |
申请号 |
US19870083710 |
申请日期 |
1987.08.10 |
申请人 |
HAGIWARA RESEARCH CORP.;KANEBO LTD. |
发明人 |
HAGIWARA, ZENJI;ANDO, SATOSHI;NOHARA, SABURO |
分类号 |
A01N25/08;A01N59/16;A01N59/18;A01N59/20;C01B33/46;C08K3/34;C09C1/40 |
主分类号 |
A01N25/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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