Claims
- 1. A process for purifying calcium carbonate ore containing silicate impurities comprising grinding and forming an aqueous slurry of said ore, adding an effective amount of a collector selective for said silicate impurities to said slurry comprising methyl-bis(2-hydroxypropyl)cocoammonium methyl sulfate, and subjecting said slurry containing said silicate impurity collector to froth flotation thereby floating the silicate impurities away from a resultant slurry containing purified calcium carbonate.
- 2. The process of claim 1 wherein the Amount of collector added to said slurry comprises from about 0.1 to about 0.5 pounds per ton of ore.
Parent Case Info
This is a division of application Ser. No. 07/206,247 filed June 13, 1988 now U.S. Pat. No. 4,892,646.
US Referenced Citations (12)
Foreign Referenced Citations (3)
Number |
Date |
Country |
119764 |
Apr 1945 |
AUX |
1187212 |
May 1985 |
CAX |
2489714 |
Mar 1981 |
FRX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
206247 |
Jun 1988 |
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