Cement waste product as scrubbing medium for sulfur oxides

Details Cement waste product as scrubbing medium for sulfur oxides Cement waste product as scrubbing medium for sulfur oxides

1980-03-17

1981-06-30

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

252189, 252190, B01J 800, C01B 1700, C09K 300

Patent

active

042762723

ABSTRACT:
Cement waste product (CWP), such as recovered from kilns utilized in cement production, is used for scrubbing of sulfur oxide-containing industrial offgases. The CWP is preconditioned with liquid water prior to employing it as a scrubbing medium. Preconditioning involves addition of sufficient water to the essentially anhydrous CWP to achieve essentially total rehydration of the rehydratable calcium compounds contained in the CWP, for example, aluminates, oxide and sulfates. The preconditioned CWP is dried and used as a highly efficient scrubbing medium for sulfur oxides.

REFERENCES:
patent: 3547583 (1970-12-01), Wilson
patent: 4105744 (1978-08-01), Erdoess et al.
patent: 4120645 (1978-10-01), Heian et al.

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