Process for the conversion of calcium sulfide
AssigneeUniversity of New Brunswick
InventorAdriaan R. P. van Heiningen
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Abstract
The disclosure relates to a process for the removal of solid CaS from a gas stream in which the CaS has been formed and then the conversion of that solid CaS by reaction with an aqueous NaOH solution to produce solid Ca(OH).sub.2 and a liquor stream containing dissolved NaHS. This removal and conversion process is described as being used in conjunction with a process for gasifying black liquor from a kraft pulping process in which H.sub.2 S is scrubbed from the gases using calcium compounds to form the CaS.
Claims1
A process for the conversion of solid CaS in a gas stream to a liquor stream containing sodium sulfide compounds comprising the steps of:
- a. separating said solid CaS from said gas stream;
- b. reacting said separated solid CaS with an aqueous solution of sodium compounds selected from the group consisting of NaOH and Na.sub.2 CO.sub.3 whereby solid Ca(OH).sub.2 and dissolved NaHS are formed;
- and
- c. separating said solid Ca(OH).sub.2 from said dissolved NaHS thereby forming said liquor stream containing NaHS.
Dependencies are inferred from the claim text.