METHOD OF PRODUCING SULPHURIC ACID AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2012 - IPC C01B17/76 C01B17/16 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry. To obtain sulphuric acid, a starting gas containing SO₂, which is obtained in an apparatus for producing sulphuric acid, is passed through at least one reactor in which catalytic oxidation of SO₂ to SO₃ takes place. The formed SO₃ is converted to sulphuric acid. At least a portion of the gas stream containing SO₂, coming out of the apparatus for producing sulphuric acid, is hydrogenated with a gas containing H₂. The gas stream containing H₂S, which is formed during hydrogenation, is fed into a H₂S scrubber for obtaining coke gas or into a petrochemical installation. The apparatus for realising the method has an apparatus 1 for producing sulphuric acid, having at least one reactor 9 for catalytic oxidation of SO₂ to SO₃ and an absorber 12 with sulphuric acid, a further processing section 17 having a hydrogenation reactor 20 into which at least one partial stream of a gas stream 16, coming from the apparatus for producing sulphuric acid, is fed. The apparatus also has a scrubber linked with the section 17, wherein the scrubber is part of the apparatus for cleaning the coke gas.

EFFECT: invention enables to exclude SO₂ emission when possible.

12 cl, 2 dwg