Process for removing foam from aqueous systems

Details Process for removing foam from aqueous systems Process for removing foam from aqueous systems

B - Operations, Transporting

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B01D 15/00 (2006.01) B01D 19/04 (2006.01) B01D 57/00 (2006.01) C08G 65/26 (2006.01) C09B 62/008 (2006.01) C09B 67/42 (2006.01) C09B 67/46 (2006.01) C11D 1/83 (2006.01) C11D 3/00 (2006.01) C11D 3/20 (2006.01) C11D 3/30 (2006.01) C11D 3/37 (2006.01) D06L 3/12 (2006.01) D06P 1/52 (2006.01) D06P 1/60 (2006.01) D06P 1/651 (2006.01)

Patent

CA 1081578

PROCESS FOR REMOVING FOAM FROM AQUEOUS SYSTEMS Abstract of the Disclosure A process for removing foam from aqueous systems such as for example effluents or dyeing and finishing baths for treating textile materials is provided. The wetting and anti-foaming compositions used in this process contain (1) 2 to 50 percent by weight of an anionic surfactant, (2) 6 to 50 percent by weight of a water-insoluble aliphatic monoalcohol containing at least 8 carbon atoms, a reaction product of alkylene oxides and a water- insoluble aliphatic monoalcohol containing at least 8 carbon atoms, a reaction product of alkylene oxides and an alkylphenol, a reaction product of a saturated dicarboxylic acid of 3 to 10 carbon atoms and 1,2-propylene oxide or poly- propylene glycols, a reaction product of a fatty acid containing 10 to 18 carbon atoms and 1,2-propylene oxide or polypropylene glycols, a reaction product of a fatty acid containing 10 to 18 carbon atoms, a trihydric to hexahydric alcohol and 1,2-propylene oxide, or a reaction product of a fatty acid containing 10 to 18 carbon atoms, a polyalkylenepolyamine and 1,2-propylene oxide, (3) 0 to 30 percent by weight of silicone oil and (4) 2 to 92 percent by weight of water.

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