Process and plant for the production of sulphuric acid

Details Process and plant for the production of sulphuric acid Process and plant for the production of sulphuric acid

2006-02-11

2010-11-23

Mayes, Melvin C (Department: 1793)

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C423S522000, C423S528000

Reexamination Certificate

active

07837970

ABSTRACT:
The invention relates to a process and plant for producing sulphuric acid by catalytic oxidation of SO2to form SO3in a converter with at least one contact stage, the SO3-containing process gas, after it has passed through at least one contact stage, being withdrawn from the converter and fed to an apparatus for recovering heat, in which steam is generated from feedwater by means of the heat of the process gas, and the process gas then being fed to an absorber, in which the SO3is absorbed in sulphuric acid. To improve the utilization of heat during the production of sulphuric acid, the feedwater is fed to the heat recovery apparatus at a higher temperature than the process gas fed to the absorber.

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