Patent · US Expired

Method of manufacturing sulphuric acid

US6153168A · kind A · utility

6Cited by

3References

5Claims

0Family size

Assignee

Metallgesellschaft AG · DE

Inventors

Ekkehart Seitz · Seeheim-Jugenheim, DE
Hermann Muller · Goldschlagstraße, DE
Georg Schmidt · Lindflur, DE

Key dates

Filing date	Jan 8, 1999
Grant date	Nov 28, 2000
Priority date	—
Expiry date	Jan 8, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B17/775
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process is provided for manufacturing sulfuric acid from a gas containing sulfur dioxide and steam. The sulfur dioxide and steam containing gas is subjected to a catalytic oxidation to convert the sulfur dioxide into sulfur trioxide so as to produce a gas having a sulfur trioxide to steam mole ratio of at least 1:1 at a temperature of 400 to 600.degree. C. This sulfur trioxide and steam containing gas is injected into an indirect heat exchanger where it is indirectly cooled with a cooling fluid so that at least 80 percent of the theoretically possible sulfuric acid is formed and condensed in this heat exchanger. The cooling fluid exiting the heat exchanger is fed into a turbine for the generation of electricity. The gas mixture exiting the heat exchanger is contacted with sulfuric acid in a separate contact vessel to form additional, concentrated sulfuric acid. The sulfuric acid formed in the heat exchanger is discharged.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.