Process for purifying sulfuric acid

Details Process for purifying sulfuric acid Process for purifying sulfuric acid

1996-12-09

1997-11-04

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423531, 423525, C01B 1774, C01B 1790

Patent

active

056836716

ABSTRACT:
In the process, used sulfuric acid which contains, as minor constituents, methylsulfuric acid, dimethyl ether, methanol, aliphatic and olefinic hydrocarbons, chlorinated hydrocarbons and oligomeric siloxanes, in a first step;

REFERENCES:
patent: 2255421 (1941-09-01), Ciroll et al.
patent: 2345506 (1944-03-01), Slotterbeck
patent: 3979465 (1976-09-01), Strehlke et al.
patent: 4935220 (1990-06-01), Schneider et al.
patent: 5275701 (1994-01-01), Mazzafro et al.
Schott Engineering 1987 from Schott Engineering GmbH, Mainz, pp. 12-17 "A Process for the concentration and purification of waste sulfuric acid is described in which oxidizing agents are added in a problem-specific manner to the waste acid".
Ullmann's Encyclopedia of Industrial Chemistry, 4th Edition, vol. 21, pp. 117 ff., Verlag Chemie Weinheim (1982) Suitable processes for concentrating dilute Sulfuric acids are described.
Database WPI Section Ch, Week 8538, Derwent Publications Ltd. AN 85-234939.
Database WPI, Section Ch, Class C 04, AN73-55105u.

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