Process for wet grinding of natural and synthetic carbonates

Details Process for wet grinding of natural and synthetic carbonates Process for wet grinding of natural and synthetic carbonates

1983-12-13

1986-08-19

Goldberg, Howard N.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 21, B02L 100, B04B 1504

Patent

active

046065032

ABSTRACT:
The invention relates to a process for wet grinding of natural and/or synthetic carbonates in wet suspensions in which the viscosity of the mass is decreased and a favorable particle size range distribution is obtained having a small portion of very fine overground particles. The carbonates in the wet grinding are mixed with zeolites to 0.05 to 3.0% by weight based on the dry weight of the carbonates. Chemical dispersants are used to help effect the process.

REFERENCES:
patent: 3604634 (1971-09-01), Windle
patent: 4193791 (1980-03-01), Weston
patent: 4310360 (1982-01-01), Kuant
Gessner G. Hawley, "The Condensed Chemical Dictionary" 10th edition, pp. 1105 and 1106.
Anderson, et al., "CaCO.sub.3 Fillers: Selection, Use in Alkaline Papermaking Systems", Pulp & Paper (Oct. 1983), pp. 82-85.
Hagemeyer et al., "Natural Calcium Carbonate for Alkaline Paper", Tappi 64:97-100 (1981).
Sutermeister, Chemistry of Pulp and Paper Making, (New York, 1948), pp. 383-386.

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