Controlling sulfur particle hardness

Details Controlling sulfur particle hardness Controlling sulfur particle hardness

1975-11-21

1980-08-05

Bernstein, Hiram H.

Chemistry: physical processes

Physical processes

Crystallization

23308S, B01D 900

Patent

active

042159962

ABSTRACT:
Crystalline sulfur particles of predetermined, controlled, relative attrition resistance having diameters less than about 0.5 inch are formed by shock-crystallizing fused sulfur in an agitated quench medium by controlling the fused sulfur temperature at a predetermined level about 238.degree. F. and below 340.degree. F. correlated with the relative particle hardness desired, and controlling the sulfur-quench temperature gradient at a level of at least about 100.degree. F. Crystalline particles having higher relative attrition resistance are obtained at higher fused sulfur temperatures and higher quenching temperature gradients.

REFERENCES:
patent: 2614908 (1952-10-01), Railsback
patent: 3222231 (1965-12-01), Markels
patent: 3637351 (1972-01-01), Young et al.
patent: 3769378 (1973-10-01), Young et al.
patent: 3830631 (1974-08-01), Young et al.
Chemical Engineers Handbook--Perry, McGraw-Hill, N. Y., 1963, 81-8-59.
Chemical Abstracts, v. 47, 12771i, 1953.

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