Process for removal of hydrogen sulfide from gases

Details Process for removal of hydrogen sulfide from gases Process for removal of hydrogen sulfide from gases

1984-03-29

1985-07-30

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423229, 423573R, B01D 5334, C01B 1705

Patent

active

045321183

ABSTRACT:
A process for the removal of hydrogen sulfide from a gas which comprises contacting the gas with a solution comprising ferric ions (Fe.sup.3+) and ferrous ions (Fe.sup.2+). The solution further comprises ethylenediamine tetraacetic acid (EDTA) or a salt thereof and triethanolamine (TEA) or a salt thereof. The solution has a pH in the range of from 7 to 9 and a mole ratio of ferric ion to total iron ions in the range of from 0.60 to 0.90 as measured just after the hydrogen sulfide contacts the solution. The process is characterized by high removal of hydrogen sulfide, prevention of side reactions, and the inhibition of the formation of intermediate colloidal sulfur.

REFERENCES:
patent: 3068065 (1962-12-01), Hartley et al.
patent: 4036942 (1977-07-01), Sibeud et al.
patent: 4278646 (1981-07-01), Lynn et al.

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