Method for decoloring sulphuric acid deriving from acid producti

Details Method for decoloring sulphuric acid deriving from acid producti Method for decoloring sulphuric acid deriving from acid producti

1989-10-18

1991-06-25

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423523, 423531, 423513, C01B 1790, C01B 1776

Patent

active

050265350

ABSTRACT:
The present invention relates to a method for decoloring sulphuric acid produced in accordance with the contact method, comprising one or more absorption circuits. The produced sulphuric acid is decolored by adding hydrogen peroxide to the system. The method is characterized by adding the hydrogen peroxide to the sulphuric acid in the final absorption circuit, and by maintaining the temperature in this circuit above about 70.degree. C.

REFERENCES:
patent: 3856673 (1974-12-01), De La Mater et al.
patent: 4045295 (1977-08-01), Schafer et al.
patent: 4085016 (1978-04-01), Janjua et al.
patent: 4157381 (1979-06-01), Bodenbenner et al.
patent: 4591494 (1986-05-01), Cameron et al.
Olsen, Unit Processes and Principles of Chemical Engineering, P. Van Nostrand Co., Inc., 1932, pp. 1-3.
Abstract of German Patent 1067793, German Patents Gazette.

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