B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 13/00 (2006.01) B01D 19/00 (2006.01) D21C 3/28 (2006.01) D21H 21/12 (2006.01)
Patent
CA 2171489
Defoaming and deaerating mixtures based on oil-in-water emulsions where the oil phase comprises from 5 to 75 % by weight of the emulsion for aqueous media prone to foaming, wherein the oil phase comprises a) at least one alcohol having at least 12 carbon atoms, dis- tillation residues obtainable in the course of the production of alcohols having a higher carbon number by the oxo process or by the Ziegler process, or mixtures thereof, b) at least one ester of a sugar alcohol having at least 4 OH groups or at least 2 OH groups and at least one intramolecu- lar ether bond and a fatty acid having at least 20 carbon atoms in a molar ratio of 1 : at least 1, in which case the free OH groups of these esters are optionally wholly or part- ly esterified with C12-C18-carboxylic acids, and optionally c) fatty acid esters of alcohols having at least 22 carbon atoms and C1-C36-carboxylic acids, fatty acid esters of C12-C22-car- boxylic acids and monohydric, dihydric or trihydric C1-C20-al- cohols, polyethylene waxes, natural waxes or mixtures there- of, and optionally d) hydrocarbons having a boiling point above 200°C, fatty acids having from 12 to 22 carbon atoms, or mixtures thereof are useful for foam control in relation to aqueous media prone to foaming, in particular for foam control in pulp cooking, pulp washing, the beating of paper stock, papermaking and the dis- persing of pigments for papermaking.
Dralle-Voss Gabriele
Oppenlander Knut
Schuhmacher Rudolf
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
Dralle-Voss Gabriele
Oppenlander Knut
Schuhmacher Rudolf
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