Title:
PRODUCTION OF CAUSTIC SODA
Document Type and Number:
Japanese Patent JP3198297
Kind Code:
B2
Abstract:
PURPOSE: To provide a method for producing caustic soda without producing chlorine together by using sodium chloride as a raw material.
CONSTITUTION: Sodium nitrate is produced by using a sodium chloride aq. solution and a nitric acid aq. solution as the raw materials by electrodialysis. Next, caustic soda and nitric acid are produced by using the formed sodium nitrate as a raw material by electrolysis or sodium oxide is formed by allowing the formed sodium nitrate to react with metal copper at 800-1200°C as following formulas. NaNO3+N2O→NaOH+HNO3NaNO3+CuO→2Na2O+CuO+NO+1/4O2.
Inventors:
Norio Takeuchi
Masaki Okada
Masaki Okada
Application Number:
JP31859592A
Publication Date:
August 13, 2001
Filing Date:
November 27, 1992
Export Citation:
Assignee:
Director, AIST, Ministry of Economy, Trade and Industry
International Classes:
C01B7/03; B01D61/44; C01D1/02; C01D1/04; C25B1/16; C25B15/08; (IPC1-7): C25B1/16; B01D61/44; C01B7/03; C01D1/02; C01D1/04; C25B15/08
Domestic Patent References:
| JP1306589A | ||||
| JP1306590A | ||||
| JP6293988A |
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