Patent ID: 9321907
Filing Date: 2016-04-26
CPC Classification: B01D,C08K,D21H

Claim Text:
1. A process for preparation of a stable fatty alcohol emulsion, wherein, said fatty alcohol emulsion comprises the following components: (A) a fatty alcohol comprising a C (B) an organic hydrocarbon in an amount which is 3 to 8% of the total mass of the fatty alcohol emulsion; (C) a monohydric orpolyhydric alcohol ester of a C (D) a non-ionic surfactant and an anionic surfactant, which are used separately or in mixture; wherein, the anionic surfactant is added in two addition steps I and II, and wherein the anionic surfactants added in the two addition steps, I and II can be identical or different; (E) a thickening agent in an amount which is 1 to 3% of the total mass of the fatty alcohol emulsion; and (F) deionized water in an amount which is 60 to 75% of total mass of the fatty alcohol emulsion; the process comprising the following steps: (1) forming a mixture of the fatty alcohol, the organic hydrocarbon, the fatty acid ester, the non-ionic surfactant, and the anionic surfactant in the first addition step I, in a reactor, heating the mixture to 70 to 95° C. and keeping the mixture at this temperature while agitating to facilitate homogeneous mixing; (2) adding deionized water at 70 to 95° C. into the mixture of step (1); (3) emulsifying the mixture of step (2) in a high-shear emulsifying device, adding the anionic surfactant in the second step II at 70 to 85° C., keeping at this temperature while agitating the emulsified mixture; and (4) cooling down the emulsified mixture from step (3) to room temperature, and then adding a thickening agent, so as to obtain the fatty alcohol antifoaming agent for paper making.