Calcination-desulfurization of green coke with concurrent sulfur

Details Calcination-desulfurization of green coke with concurrent sulfur Calcination-desulfurization of green coke with concurrent sulfur

1974-09-27

1976-04-13

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423461, 44 1F, C01B 1706

Patent

active

039505030

ABSTRACT:
In a staged calcination process a sulfur-containing green coke is converted to a low-sulfur-content coke and two off-gas streams, one which contains sulfur dioxide and another which contains hydrogen sulfide. In one stage the green coke is calcined and partially desulfurized under oxidative conditions at a temperature in the range 1000.degree. to 3000.degree.F. In a second stage, the calcination and desulfurization is continued by heating the coke from 2000.degree. to 4000.degree.F under substantially reducing conditions. Preferably the reaction times and conditions in the stages are adjusted to result in the production of two mols of hydrogen sulfide per mol of sulfur dioxide. Portions of the two off-gas streams are mixed and reacted to form elemental sulfur.

REFERENCES:
patent: 2721169 (1955-10-01), Mason et al.
patent: 3759673 (1973-09-01), Whitten et al.

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