Process for removing sulfur and NO.sub.x components from a gas s

Details Process for removing sulfur and NO.sub.x components from a gas s Process for removing sulfur and NO.sub.x components from a gas s

1977-06-23

1978-10-31

Thomas, Earl C.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423239, 423242, 423243, 423244, 423352, 423539, 423564, C01B 1704, B01D 5334

Patent

active

041235070

ABSTRACT:
A feed gas containing one or more components selected from the class consisting of H.sub.2 S, SO.sub.2, SO.sub.3, COS, CS.sub.2, light mercaptans, and sulfur vapor is desulfurized by (a) hydrogenating and hydrolyzing essentially all non-H.sub.2 S sulfur components to H.sub.2 S, (b) oxidizing most of the H.sub.2 S in the resulting product gas to sulfur, and removing the latter by condensation, (c) oxidizing the residual H.sub.2 S to SO.sub.2, (d) absorbing essentially all the SO.sub.2 in an aqueous ammonia solution, (e) passing a portion of the SO.sub.2 -containing ammonia solution to step (a), and (f) discharging from step (d) a purified product gas essentially free of sulfur components.
A feed gas, such as a stack gas, which contains only SO.sub.2 and SO.sub.3 components to be removed therefrom, may be treated in alternative embodiments of the invention involving the passage of all or a major proportion of the feed gas directly to absorption step (d).
In all embodiments of the invention a substantial proportion of NO.sub.x components, if present in the feed gas, is also removed.

REFERENCES:
patent: 2083894 (1937-06-01), Connolly
patent: 3598878 (1971-08-01), Kovach et al.
patent: 3752877 (1973-08-01), Beavan
patent: 3794710 (1974-02-01), Merrill
patent: 4012488 (1977-03-01), Brocoff
patent: 4036943 (1977-07-01), Huron et al.
patent: 4039621 (1977-08-01), Costantini
patent: 4048293 (1977-09-01), Renault et al.

Affiliated with

Also associated with

Rating

Process for removing sulfur and NO.sub.x components from a gas s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for removing sulfur and NO.sub.x components from a gas s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for removing sulfur and NO.sub.x components from a gas s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1835313