Process for production of rhombic shaped precipitated calcium ca

Details Process for production of rhombic shaped precipitated calcium ca Process for production of rhombic shaped precipitated calcium ca

1992-07-10

1994-07-26

Straub, Gary P.

Chemistry of inorganic compounds

Carbon or compound thereof

Oxygen containing

423164, 423165, 106464, 106465, C01F 524, C01F 1118

Patent

active

053325648

ABSTRACT:
A process for producing rhombic or barrel shaped precipitated calcium carbonate. Quicklime is slaked in an aqueous solution containing about 0.1% to about 2% by weight of a sugar, based upon the weight of the CaCO.sub.3 to be produced. Carbon dioxide is added to the slaked lime slurry at a preferred temperature of about 50.degree. F.-70.degree. F. until the pH drops from about 11-12 to about 7-8.

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