Methods of foam inhibition or depression

Details Methods of foam inhibition or depression Methods of foam inhibition or depression

B - Operations, Transporting

01

D

134/54

B01D 19/04 (2006.01) C11D 1/722 (2006.01) D21H 17/53 (2006.01)

Patent

CA 1163163

EL Code 228.00 ABSTRACT OF THE DISCLOSURE Methods of foam inhibition or depression in industrial milieu. The present methods generally involve the use of certain nonionic surfactants having the structure: R1-(OC2H4)X-(OC3H6)y-OH wherein R1 is a monovalent organic hydrophobic moiety or hydrophobe, preferably selected from the group consisting of long chain or higher molecular weight primary or secondary alcohols, alkyphenols, or mixtures thereof; x is the value of the average number of moles or units of ethylene oxide per defoamer molecule and has a value in the range of 3 to 20, preferably 5 to 15; y is the average number of moles or units of propylene oxide per molecule of defoamer and has a value in the range of from 15 to 60, preferably 20 to 50.

380054

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