Preparation of reactive beta-dicalcium silicate

Details Preparation of reactive beta-dicalcium silicate Preparation of reactive beta-dicalcium silicate

1980-02-28

1982-02-09

Meros, Edward J.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423244, C01B 3324

Patent

active

043149804

ABSTRACT:
This invention relates to the preparation of fine particles of reactive beta-dicalcium silicate by means of a solid state process which comprises firing a mixture of calcium sulfate, silica and a reducing additive selected from the group consisting of calcium sulfide, carbon, carbon monoxide, methane and hydrogen, at a temperature of about 850.degree.-1000.degree. C. A carrier gas such as nitrogen or carbon dioxide may also be added, if desired. A high concentration of sulfur dioxide is a by-product of this process.

REFERENCES:
patent: 2263606 (1941-11-01), Balassa
patent: 2863726 (1958-12-01), Kamlet
patent: 3717489 (1973-02-01), Herzog et al.
Shen et al. "Regenerative Process for Desulfurization of High Temperature Combustion and Fuel Gases", BNL 50992, May 1979, p. 22.
Roy et al. "J. American Ceramic Society", vol. 60, No. 3-4, 1977, pp. 178-180.
Heller et al. "J. Chem. Soc.", London (1952) pp. 2535-2541.

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