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    • 6. 发明授权
    • Defoaming and deaerating mixtures for aqueous media prone to foaming
    • 用于含水介质的消泡和脱气混合物容易发泡
    • US5744066A
    • 1998-04-28
    • US612500
    • 1996-03-07
    • Knut OppenlanderGabriele Dralle-VossRudolf Schuhmacher
    • Knut OppenlanderGabriele Dralle-VossRudolf Schuhmacher
    • B01D19/04D21C3/28D21H21/12
    • B01D19/0404D21C3/28D21H21/12
    • 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, distillation 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 intramolecular 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 partly esterified with C.sub.12 -C.sub.18 -carboxylic acids, and optionally c) fatty acid esters of alcohols having at least 22 carbon atoms and C.sub.1 -C.sub.36 -carboxylic acids, fatty acid esters of C.sub.12 -C.sub.22 -carboxylic acids and monohydric, dihydric or trihydric C.sub.1 -C.sub.20 -alcohols, polyethylene waxes, natural waxes or mixtures thereof, and optionally d) hydrocarbons having a boiling point above 200.degree. 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 dispersing of pigments for papermaking.
    • 基于水包油乳液的消泡和脱气混合物,其中油相包含5至75重量%的用于容易发泡的水性介质的乳液,其中油相包含a)至少一种具有至少12个碳的醇 原子,在通过氧化方法或通过齐格勒方法生产具有较高碳数的醇的过程中可获得的蒸馏残余物或其混合物,b)至少一种具有至少4个OH基团的糖醇酯或在 至少2个OH基团和至少一个分子内醚键和至少具有20个碳原子的脂肪酸,摩尔比为1:至少为1,在这种情况下,这些酯的游离OH基团任选地全部或部分地被C 12 -C 18羧酸和任选地c)具有至少22个碳原子的醇和C 1 -C 36羧酸的脂肪酸酯,C 12 -C 22羧酸的脂肪酸酯和一元,二元或三元C 1 -C 20醇 ,聚乙烯 蜡,天然蜡或其混合物,以及任选的d)沸点高于200℃的烃,具有12至22个碳原子的脂肪酸或其混合物可用于相对于容易发泡的水性介质的泡沫控制, 特别是用于纸浆烹饪,纸浆清洗,纸料打浆,造纸和用于造纸的颜料分散中的泡沫控制。