发明名称 |
Process for the Preparation of Common Salt of High Purity from Brines in Solar Salt Pans |
摘要 |
The process of the invention is an improvement over the existing process of producing salt of high purity from alum-treated brine disclosed recently in the prior art. More particularly, the invention rectifies the ratio of Ca2+ to Mg2+ from a value <1 to a value in the range of 2-3 desired by chlor-alkali and soda ash industries. The improved process involves the adjustment of pH of clarified brine with aqueous HCl so as to carry out salt crystallization at a pH of 6.5 instead of at the natural pH of 7. The pH adjustment reduces the Mg2+ impurity in salt while slightly raising the Ca2+ impurity in the salt and thereby achieving the desired ratio.
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申请公布号 |
US2009175781(A1) |
申请公布日期 |
2009.07.09 |
申请号 |
US20080240762 |
申请日期 |
2008.09.29 |
申请人 |
COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH |
发明人 |
KUMAR ARVIND;MUKHOPADHYAY INDRAJIT;GHOSH PUSHPITO KUMAR;MOHANDAS VADAKKE PUTHOOR;SHUKLA JIGNESH JASVANTRAI;SANGHAVI RAHUL JASVANTRAI |
分类号 |
C01D3/06 |
主分类号 |
C01D3/06 |
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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