发明名称 |
Chemical treatment of sand |
摘要 |
A process for treating sand which includes one or more stages in which sand is mixed with a dilute aqueous solution of hydrofluoric or sulphuric acid together with zinc or sodium hydrosulphite and the resulting slurry is agitated at ambient temperature in an atmospheric oxygen-free environment.
|
申请公布号 |
US4542003(A) |
申请公布日期 |
1985.09.17 |
申请号 |
US19840625011 |
申请日期 |
1984.06.27 |
申请人 |
BRITISH INDUSTRIAL SAND LIMITED |
发明人 |
WATKINS, PAUL;SCOTT, JOHN W. |
分类号 |
C03C1/02;(IPC1-7):C01B33/18 |
主分类号 |
C03C1/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|