Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1976-10-07
1979-09-04
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
041668383
ABSTRACT:
A process for exhaust gas desulfurization by the wet lime-gypsum process comprises an absorption step for scrubbing the exhaust gases with a calcium hydroxide slurry as an absorbent; an oxidizing step for oxidizing a slurry composed chiefly of calcium sulfite from the absorption step; and a solids-liquid separation step for separating a slurry composed mainly of gypsum from the oxidizing step, characterized in that the liquid from said solids-liquid separation step is passed into a sulfate impurity reaction step where said liquid reacts with added calcium hydroxide and is thereby freed from water-soluble sulfate impurities; and the so purified liquid is supplied to the absorbent preparation step where it is mixed with calcium hydroxide to form said absorbent. Also, precipitates formed in said sulfate impurity reaction step are supplied to said absorbent preparation step.
REFERENCES:
patent: 2073039 (1937-03-01), Wilton et al.
patent: 2080779 (1937-05-01), Lessing
patent: 3888968 (1975-06-01), Atsukawa et al.
patent: 3903243 (1975-09-01), Atsukawa et al.
patent: 3961020 (1976-06-01), Seki
patent: 3961021 (1976-06-01), Morita et al.
patent: 3972980 (1976-08-01), Lowell
patent: 4046856 (1977-09-01), Itoo et al.
Atsukawa Masumi
Inoue Yasuyuki
Tatani Atsushi
Yoneda Kenichi
Heller Gregory A.
Mitsubishi Jukogyo Kabushiki Kaisha
Vertiz O. R.
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