Sulphur recovery process

Details Sulphur recovery process Sulphur recovery process

B - Operations, Transporting

01

D

23/345, 23/356

B01D 53/34 (2006.01) C01B 17/05 (2006.01)

Patent

CA 1176433

A B S T R A C T In the removal of H2S and optionally CO2 from a gas by contacting with a reactant solution containing an ion or a chelate of a polyvalent metal with formation of solid sulphur and reduced reactant, the presence of an alkanol having 4 to 18 carbon atoms increases the crystal size of the sulphur; the solution may contain an absorbent selective for CO2. The presence of sodium thiocyanate, sodium dithionite, thio- diglycolic acid and/or 3,3-thiodipropionic acid addresses degradation of the chelates.

402901

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