Process for separating metal sulphates from sulphuric acid

Details Process for separating metal sulphates from sulphuric acid Process for separating metal sulphates from sulphuric acid

1988-07-13

1990-08-28

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423 83, 423140, 423DIG2, 423558, C01B 1790, C01G 23053, C01G 4914

Patent

active

049523872

ABSTRACT:
A process for the separation of metal sulphates from dilute sulphuric acid by evaporative concentration of the sulphuric acid to a concentration of from 55 to 75% by weight H.sub.2 SO.sub.4, cooling of the resulting solution or suspension and mechanically separating the solid metal sulphates and/or hydrogen sulphates, wherein an Fe(III) content of at least 0.01% by weight is ensured before the separation.

REFERENCES:
patent: 1146071 (1915-07-01), Hoffman
patent: 1384974 (1921-07-01), Shaw
patent: 1795995 (1931-03-01), Busching
patent: 2196584 (1940-04-01), Edison
patent: 3210156 (1965-10-01), Zirngibl
patent: 3387927 (1968-06-01), Goldberger
patent: 3436177 (1969-04-01), Spedden et al.
patent: 3542508 (1970-11-01), Sercombe et al.
patent: 3816593 (1974-06-01), Johnson et al.
patent: 4155984 (1979-05-01), Cohen et al.

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