Chemistry: electrical and wave energy – Processes and products – Electrophoresis or electro-osmosis processes and electrolyte...
Patent
1997-12-29
1999-11-09
Gorgos, Kathryn
Chemistry: electrical and wave energy
Processes and products
Electrophoresis or electro-osmosis processes and electrolyte...
210660, 423181, B01D 5942
Patent
active
059807172
ABSTRACT:
A substantial and increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the spent liquor entering the recovery boiler. Chloride and potassium increase the stickiness of carryover deposits and dust particles to the recovery boiler tubes, which accelerate fouling and plugging in the upper part of the recovery boiler. The present invention relates to a process by which the content of potassium ions in a recovery system for pulping chemicals can be reduced. The process comprises bringing spent liquor to a recovery boiler, burning said spent liquor, collecting precipitator dust formed, forming a solution by dissolving the precipitator dust in a liquid, where the solution of precipitator dust is subjected to a treatment with an inorganic ion exchange material in order to remove at least a part of the potassium therein.
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patent: 5628874 (1997-05-01), Lindberg et al.
Metals Management in a Closed Kraft Mill Bleach Plant, 1994 Pulping Conference, pp. 1155-1160.
European Search Report, dated Feb. 2, 1998.
Hammer-Olsen Roy
Linsten Magnus
Pudas Roland
Svedin Bjorn
Velander Ingrid
Eka Chemical AB
Gorgos Kathryn
Mancini Ralph J.
Parsons Thomas H
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