A process for suppressing the foaming of an aqueous system

Details A process for suppressing the foaming of an aqueous system A process for suppressing the foaming of an aqueous system

B - Operations, Transporting

01

D

B01D 19/04 (2006.01) D21H 21/12 (2006.01)

Patent

CA 2504726

The present invention relates to a process for suppressing the foaming of an aqueous system which involves combining water and at least one defoamer composition which has a hydroxyl equivalent molecular weight of at least 4000 DA and a cloud point less than or equal to 30~C in 1% aqueous solution. The high hydroxyl equivalent molecular weight defoamers of the present invention exhibit excellent defoaming properties at a low cloud point. Additionally, defoamers of the present invention exhibit defoaming properties which are better than those of defoamers having the same cloud point which are based on polyoxyalkylene copolymers prepared in the presence of potassium hydroxide. The superior defoaming properties of the defoamers of the present invention are particularly useful in the manufacture or processing of food items.

L'invention concerne un procédé de suppression de moussage d'un système aqueux qui implique la combinaison d'eau et d'au moins une composition de démoussage qui contient un poids moléculaire équivalent hydroxyle d'au moins 4000 DA et un point de trouble inférieur ou égal à 30 ·C dans un 1 % de solution aqueuse. Les démousseurs à poids moléculaire équivalent hydroxyle de l'invention présentent d'excellentes propriétés de démoussage à un point de trouble bas. De plus, ces démousseurs présentent de meilleures propriétés de démoussage que celles des démousseurs présentant le même point de trouble, lesquels sont fondés sur des copolymères polyoxyalkylène préparés en présence d'hydroxyde de potassium. Les propriétés de démoussage des démousseurs de l'invention permettent de les utiliser dans la fabrication ou le traitement d'articles alimentaires.

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