CALCIUM SULFITE OXIDIZING METHOD - KUREHA CHEMICAL IND CO LTD

Title:

CALCIUM SULFITE OXIDIZING METHOD

Document Type and Number:

Japanese Patent JPS5388694

Kind Code:

A

Abstract:

PURPOSE: To convert a CaSO3 slurry formed by absorbing SO2 into gypsum with preventing formation of a by-product dithionic acid by blowing O2 or air into the slurry at prescribed pH in the presence of one more out of sulfates of alkali (earth) metals and NH3.

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Inventors:

MORITA TOMIJIROU
KUSANO HIDEO
FUNAHASHI ISAO
OOTA MINORU
MATSUDA NORIHARU

Application Number:

JP300177A

Publication Date:

August 04, 1978

Filing Date:

January 17, 1977

Export Citation:

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Assignee:

KUREHA CHEMICAL IND CO LTD

International Classes:

B01D53/50; B01D53/77; C01F11/46; (IPC1-7): B01D53/34; C01F11/46

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