Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1988-12-23
1990-05-01
Hruskoci, Peter
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210705, 210710, 210712, 210725, 210727, 210738, 210928, 162 16, C02F 124
Patent
active
049216139
ABSTRACT:
The present invention solves the problem of managing resin-containing waste liquors within the cellulose pulp industry. The invention relates to a method for purifying resin-containing waste liquor in the manufacture of cellulose pulp, in which method a pH-adjusting chemical is, when necessary, added to resin-containing waste liquor removed from the cellulose pulps, so that the pH of the waste liquor will lie within the pH range 1-7, and in which a water-soluble organic polymer is added to the waste liquor in the form of a forwardly moving liquid stream. The method is characterized by dividing up the requisite amount of polymer into part quantities which are introduced into the liquid stream on at least two occasions, by subjecting the liquid stream to a pronounced shearing and/or turbulent treatment process, and by subsequently separating agglomerated resin from the waste liquor.
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Engstrom Thomas B.
hlund Jan
Nordberg Cecilia M.
Pinzke Thomas
Sanneskog Owe
Boliden Aktiebolag
Hruskoci Peter
Shideler Krisanne
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