Patent Profile
| Patent No: | US8021442 [USA] | Application No: | 12/240762 |
| Title: | Process for the preparation of common salt of high purity from brines in solar salt pans | ||
| Issue Date: | 20-09-2011 | File Date: | 29-09-2008 |
| Inventor(s): | KUMAR; ARVIND (BHAVNAGAR, IN), MUKHOPADHYAY; INDRAJIT (BHAVNAGAR, IN), GHOSH; PUSHPITO KUMAR (BHAVNAGAR, IN), MOHANDAS; VADAKKE PUTHOOR (BHAVNAGAR, IN), SHUKLA; JIGNESH JASVANTRAI (BHAVNAGAR, IN), SANGHAVI; RAHUL JASVANTRAI (BHAVNAGAR, IN) | ||
| IPC Classification: | C01D3/00 | ||
| Abstract: | 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 Ca.sup.2+ to Mg.sup.2+ 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 Mg.sup.2+ impurity in salt while slightly raising the Ca.sup.2+ impurity in the salt and thereby achieving the desired ratio. | ||
| Licensing Option: | Technology development complete. Engineering package can be supplied. | ||
CSIR-Central Salt & Marine Chemicals Research Institute[CSIR-CSMCRI]
: director[at]csmcri[dot]res[dot]in
:91-278- 2569496 Ext. 6000, 6010
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: director[at]csmcri[dot]res[dot]in
:91-278- 2569496 Ext. 6000, 6010
:https://www.csmcri.res.in
Industrial Applications
Chemistry, Chemical Processes Polymers [Chemistry, Chemical Processes]
Food Processes [Food,Beverages,Tobacco]