Process for the concentration of diluted salt-containing sulphur

Details Process for the concentration of diluted salt-containing sulphur Process for the concentration of diluted salt-containing sulphur

1974-10-17

1976-11-16

Bernstein, Miram H.

Concentrating evaporators

Processes

Involving waste liquid

423531, 159DIG19, H01B 1300, C01B 1784, C01B 1790

Patent

active

039922472

ABSTRACT:
A two step process for concentrating and desalting dilute sulfuric acid including, first indirectly countercurrently contacting and heating the dilute acid with steam from a second step, removing overhead water vapor and withdrawing concentrated acid, and second further concentrating the acid by directly countercurrently contacting and heating the acid with superheated steam, removing overhead steam and additional water vapor, which is used in the first heating step. Acid of a higher concentration is withdrawn and cooled to crystallize and remove salts and the more highly concentrated sulphuric acid recovered.

REFERENCES:
patent: 1934234 (1933-11-01), Phillips
Manufacture of Sulfuric Acid, 1959, pp. 328, 333, Mantius-Concentrating Sulfuric Acid, Reinhold, N.Y.

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