B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/34 (2006.01) B01D 53/14 (2006.01) D21C 11/06 (2006.01) D21C 11/12 (2006.01) F28C 3/06 (2006.01)
Patent
CA 2043538
ABSTRACT. The present invention relates to a process for the separation of sulphur and sodium compounds from a hot process gas gener- ated during gasification of spent liquor from the kraft pulping industry, through contact with hydrogen sulfide ion and hy- droxide ion containing alkaline liquids in two or more stages, whereby the process gas in a first stage passes through a ven- turi throat and/or liquid trap where it is brought into contact with an alkaline washing liquid, whereby melt droplets in the process gas are separated from the gas flow and drawn off as an aqueous solution, whereby the process gas in a subsequent wash- ing stage is brought into contact with a finely dispersed wash- ing liquid containing hydroxide ions and hydrogen sulphide ions with a molar ratio greater than 4:1. (FIG)
Nils Bernhard
Stigsson Lars
Chemrec Aktiebolag
Fetherstonhaugh & Co.
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