Process for desulfurization of exhaust gases recovering gypsum a

Details Process for desulfurization of exhaust gases recovering gypsum a Process for desulfurization of exhaust gases recovering gypsum a

1978-04-04

1980-05-20

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423166, C01B 1700

Patent

active

042039541

ABSTRACT:
This invention relates to a process for desulfurization of exhaust gases wherein the sulfur oxides are efficiently removed in the stabilized form from exhaust gases containing said sulfur oxides and at the same time gypsum of good quality is recovered. More particularly, this invention relates to a process wherein exhaust gases are treated with a slurried solution of gypsum containing a specified organic acid component, sulfuric acid component, and an alkali component at a pH value of 5-3 so that the sulfur oxides in said exhaust gases are absorbed and oxidized to form gypsum which is recovered as a by-product of good quality containing no unreacted lime.

REFERENCES:
patent: 3757488 (1973-09-01), Austin et al.
patent: 3798309 (1974-03-01), Knowles et al.
patent: 3928537 (1975-12-01), Saitoh et al.
patent: 3972980 (1976-08-01), Lowell
patent: 3983217 (1976-09-01), Muraki et al.
patent: 3987149 (1976-10-01), Saitoh et al.

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