USING ALKOXYLATED POLYALKANOLAMINES TO DEMULSIFY OIL-IN-WATER EMULSIONS Russian patent published in 2013 - IPC B01D17/05 C10G33/04 C08G73/02 

FIELD: chemistry.

SUBSTANCE: invention relates to use of alkoxylated polyalkanolamines to demulsify oil-in-water emulsions, primarily oil emulsions. Alkoxylated polyalkanolamines are obtained (A) by condensing at least one trialkanolamine to a polyalkanolamine, the obtained polyalkanolamine having number-average molecular weight from 1000 to 20000 g/mol, and (B) alkoxylating the obtained polyalkanolamine with ethylene oxide and propylene oxide. The formed polyoxyalkylene groups have a block structure of general formula: -(CH₂CH₂O)_x(CH₂CH(CH₃)O)_yH, in which x and y denote a number from 3 to 100, respectively, and the ratio y/x is greater than 1.

EFFECT: disclosed demulsifiers are suitable for faster and complete phase separation of oil-in-water emulsions, primarily oil emulsions.

11 cl, 2 tbl, 8 ex