Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Including recovery of organic by-product
Patent
1977-01-13
1978-04-18
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Including recovery of organic by-product
260 977, D21C 1100
Patent
active
040850005
ABSTRACT:
As a tall-oil-soap skimming aid, there is added to black liquor resulting from the pulping of coniferous trees a terpolymer of (a) an alpha-beta-unsaturated acid, (2) an alkylate of an alpha-beta-unsaturated acid, and (3) allyl alcohol. The acid contains 3 to 4 carbon atoms and comprises about 60 to about 88 percent by weight of the terpolymer. The alkylate comprises about 6 to 28 parts by weight of the terpolymer, being an ester of the abovementioned acids, the ester having an alkyl portion containing 1 to 18 carbon atoms. Allyl-alcohol units are present in the terpolymer to an extent of 4.5 to 20 weight percent. The terpolymer can be produced by free-radical polymerization in accordance with the customary procedures. With the use of such a copolymer, the proportion of tall oil recovered from black liquor is very substantially increased.
REFERENCES:
patent: 3873417 (1975-03-01), Otrhalek et al.
patent: 3880704 (1975-04-01), Ziegler et al.
Elfers Gunther Hans
Gomes Gilbert Stephen
Otrhalek Joseph V.
BASF Wyandotte Corporation
Bashore S. Leon
Dunn Robert E.
Linkhauer John W.
Smith William F.
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