Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1994-12-08
1996-10-01
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423240R, 42324301, 42324308, 42324407, B01J 800, C01B 700, C01B 1722
Patent
active
055608949
ABSTRACT:
A process for removing environmental contaminants from an exhaust gas by a semidry method through contact with an absorbent slurry containing alkaline compounds in a reactor, comprising the steps of adding a material containing calcium sulfate and/or calcium sulfite, a material containing aluminum oxide, and a material containing silicon dioxide to a material capable of supplying calcium oxide, mixing the mixture with water, curing the whole mixture in hot water, and then introducing and dispersing the resulting absorbent slurry in the reactor for contact with the environmental contaminants. In a modification the absorbent slurry is obtained by adding a material capable of supplying aluminum oxide, silicon dioxide, and calcium sulfate and/or calcium sulfite to a material capable of supplying calcium oxide, calcining the mixture at 750.degree.-950.degree. C., mixing the calcined product with water, and curing the mixture in hot water. To the absorbent slurry obtained in either way is added a soluble compound that elevates the boiling point of water.
REFERENCES:
patent: 4279873 (1981-07-01), Felsvang et al.
patent: 4442080 (1984-04-01), Donnelly et al.
patent: 4804521 (1989-02-01), Rochelle et al.
Translated abstract of above document (attached to document).
Hackh's Chemical Dictionary, 1987 (no month) p. 338 Grant et al.
Fujita Hiroshi
Kitayama Yutaka
Kotake Shinichiro
Tatani Atsushi
Tsuchiai Hiroaki
Dunn Jr. Thomas G.
Hokkaido Electric Power Co., Inc.
Mitsubishi Jukogyo Kabushiki Kaisha
Straub Gary P.
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