发明授权
- 专利标题： Method of manufacturing aqueous solutions of alkali polysilicates
- 专利标题（中）： 制造碱性聚硅酸盐水溶液的方法
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申请号： US496778申请日： 1974-08-12
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公开(公告)号： US3984526A公开(公告)日： 1976-10-05
- 发明人: Rainer Haase , Volker Hunger , Arnold Lenz
- 申请人： Rainer Haase , Volker Hunger , Arnold Lenz
- 申请人地址： DT Troisdorf
- 专利权人： Dynamit Nobel Aktiengesellschaft
- 当前专利权人： Dynamit Nobel Aktiengesellschaft
- 当前专利权人地址： DT Troisdorf
- 优先权： DT2343026 19730825
- 主分类号： C01B33/32
- IPC分类号： C01B33/32 ; C08G77/02 ; C09D1/02 ; C09D183/02
摘要：
A process for the preparation of an aqueous alkali metal polysilicate solution having an SiO.sub.2 : alkali metal oxide mole ratio of 2.5 - 5.5 : 1 and a silica content of 16 - 23% by weight which comprises contacting a tetraalkoxysilane of the formula Si(OR).sub.4 wherein each R is independently a straight or branched-chain alkyl group of 1 to 3 carbon atoms with an aqueous alkali metal hydroxide solution at a temperature between room temperature and the boiling point of the reaction mixture and at a temperature up to 100.degree.C. distilling over alcohol formed by the reaction of the silane with the alkali metal hydroxide.
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