Process for recovering caustic alkali from spent alkali liquor

Details Process for recovering caustic alkali from spent alkali liquor Process for recovering caustic alkali from spent alkali liquor

1978-03-14

1979-09-25

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

423204, 423641, C01D 104

Patent

active

041691318

ABSTRACT:
A process for recovering caustic alkali from spent alkali liquor, in which a spent alkali liquor and iron oxide are roasted to obtain a product containing alkali ferrate and the product of roasting is hydrolyzed at a temperature over 110.degree. C. and under pressurized conditions where liquid phase is retained, thereby recovering caustic alkali in the form of an aqueous solution of a concentration higher than approximately 15 wt% containing dissolved iron in an extremely small concentration.

REFERENCES:
patent: 1757592 (1930-05-01), Schleicher
Babor, Basic College Chemistry, Second Edition, Thomas Y. Crowell Company, New York (1953), pp. 255-260.
Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 13, Second Edition (1967), p. 861.

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