C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 317/18 (2006.01) B01D 17/04 (2006.01) B01F 17/00 (2006.01) C02F 1/54 (2006.01) C07D 319/06 (2006.01) C10M 173/00 (2006.01) C11D 1/722 (2006.01) C23G 5/00 (2006.01) D21C 5/02 (2006.01) D21C 9/10 (2006.01) C02F 1/42 (2006.01)
Patent
CA 2176276
-58- A nonionic surfactant having cyclic 1,3-dioxane and/or 1,3- dioxolane functionality which is irreversibly splittable by lowering the pH of its aqueous solution is useful in various processes requiring the removal of emulsified hydrophobic contaminants or other hydrophobic materials from an aqueous stream. After splitting of the surfactant into its component ketone and polyol, the hydrophobic components phase-separate and can be removed from the aqueous stream by routine means. The non-ionic surfactant is represented by the formulas: Image or, Image of which R and R' are the residue of an organic compound (substituted or unsubstituted) which does not contain a beta-alkoxy substituent or other moieties or linkages which significantly interfere with the performance of the surfactant for its intended purpose and derived from a ketone of the formula -59- Image wherein R and R' may be the same or different and are residues of an organic compound (substituted or unsubstituted) which contains a total of 8 to 20 carbon atoms; X is hydrogen or the residue of a hydrophobic end-cap; Y is hydrogen, methyl, ethyl, or mixtures thereof; Z is hydrogen, methyl, or ethyl; m is 0 or 1; and n is an integer of 1 to 40.
Galante Denise Christine
Hoy Richard Charles
Joseph Albert Ferris
King Stephen Wayne
Smith Charles Arnold
Sim & Mcburney
Union Carbide Chemicals & Plastics Technology Corporation
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