Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1995-12-22
1998-04-14
McCarthy, Neil
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 35, 423164, 423560, 423DIG3, D21C 1112
Patent
active
057387583
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.
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McCarthy Neil
The University of New Brunswick
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