Defoamer

Inventors: Noorazlenawati Borhan (Kuala Lumpur, MY); Suzalina Zainal (Kuala Lumpur, MY); Khairulazhar Jumbri (Perak Darul Ridzuan, MY); Anita Ramli (Perak Darul Ridzuan, MY); Almila Hassan (Perak Darul Ridzuan, MY)

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Abstract

Provided are defoamer compounds that have efficacy in the prevention of foam build-up and breakdown of built up foam in industrial processes.

Claims (19)

1 . A compound selected from one of the following structures:

wherein the central siloxane polymer moiety

has a number average molecular weight of from 2,250 Daltons to 2,750 Daltons.

2 . A method of reducing build-up of foam in a reactor, wherein the method comprises a step of adding the compound of claim 1 to the reactor.

3 . The compound according to claim 1 , wherein the compound has the structure:

4 . The compound according to claim 1 , wherein the compound has the structure:

5 . The compound according to claim 1 , wherein the compound has the structure:

6 . The compound according to claim 1 , wherein the compound has the structure:

7 . The method of claim 2 , wherein the reactor comprises:

crude oil;

water; and

a surfactant.

8 . The method of claim 2 , where the step of adding the compound to the reactor comprises adding the compound in an amount from 10 ppm to 50 ppm.

9 . A composition comprising:

crude oil;

water;

a surfactant; and

from 10 ppm to 50 ppm of the compound of claim 1 .

10 . The composition of claim 9 , wherein the temperature of the composition is from 30° C. to 80° C. at an applied pressure of from 1 bar to 4 bar.