Ddelay coking defoaming agent composition and preparation method thereof

Abstract

The invention relates to a delay coking defoaming agent composition and a preparation method thereof, the defoaming agent is prepared by compounding fluorine-containing polysiloxane, glycerin type dendritic polyether, high carbon alcohol and a solvent. The preparation method of the defoaming agent is as follows: dispersing the fluorine-containing polysiloxane in the high carbon alcohol, stirring for 1 to 2 hours at 10-30 DEG C, then adding the glycerin type dendritic polyether and the solvent, stirring for 1 to 5 hours at 100-150 DEG C, and cooling to obtain a defoaming agent product. The delay coking defoaming agent has excellent defoaming antifoaming performances at 400-500 DEG C, in a high temperature delay coking process, the delay coking defoaming agent can still maintain good defoaming antifoaming performances and stability.

Description

technical field [0001] The invention relates to a defoamer composition and a preparation method thereof, in particular to a defoamer composition incorporating fluorine-containing polysiloxane and glycerin-type dendritic polyether, which belongs to the technical field of fine chemicals. The above-mentioned defoamers are especially suitable for the field of delayed coking. Background technique [0002] Delayed coking is a thermal processing process that converts residual oil into coking dry gas, coking gasoline and diesel oil, coking gas oil and coke by deep cracking. The raw material residue of delayed coking contains natural surfactant, which makes a large amount of foam in the coking reaction tower during the delayed coking process, forming a very high foam layer. The foam layer contains a large amount of coke powder. When the coke layer in the coke tower rises to a certain height in the later stage of coking, the foam layer will be carried from the oil and gas pipeline at...

AI Technical Summary

Problems solved by technology

The defoamer does not contain any silicon element, and will not affect the downstream hydrogenation process and the quality of the final light oil product, but the disadvantage is that the active components are not enough, and the penetration and diffusion in the tower are slow, so the addition amount is large, The cost is higher than that of silicone defoamers, while the high temperature resistance is poor, and the defoaming efficiency is low at high temperatures

[0007] US5667669 provides a method of replacing silicon-containing defoamers with animal and vegetable oils and polyisobutylene, which not only increases the cost of defoaming, but also has a general defoaming effect