Delaying coking non-silicon defoaming agent with multiple active components and preparation method thereof

Abstract

The invention discloses a delaying coking non-silicon defoaming agent with multiple active components and a preparation method thereof, and the defoaming agent is formed by compounding 30-50 parts by weight of polyether or modified polyether polymer, 25-35 parts by weight of high-carbon alcohol mixture, 10-15 parts by weight of high-carbon alcohol fatty acid ester or fatty acyl amide and 15-20 parts by weight of alkymer. The preparation method of the defoaming agent comprises the following steps: adding the polyether or the modified polyether polymer, the high-carbon alcohol mixture, the high-carbon alcohol fatty acid ester or the fatty acyl amide and the alkymer into a reaction kettle according to the proportion, stirring, slowly increasing the temperature to 50-100 DEG C, carrying out reaction for 1-2h, finally stopping stirring, cooling, filtering for removing solid impurities and finally preparing the delaying coking non-silicon defoaming agent. The defoaming agent can effectively suppress and eliminate the formation of bubbles in a delayed coking reaction tower, improve the treatment capacity of the reaction tower, prolong the coking time of coke and prevent clogging phenomenon.

Description

technical field [0001] The invention relates to a defoamer and a preparation method thereof, in particular to a delayed coking non-silicon defoamer with multiple active components and a preparation method thereof. Background technique [0002] Delayed coking technology is one of the most important processing methods for the lightening of residual oil. It has the characteristics of low investment and operating costs, strong adaptability to different raw materials, and mature technology. Over the years, my country's crude oil has generally been heavy in oil quality, high in wax content, and low in diesel yield, resulting in a prominent contradiction between the supply and demand of diesel-gasoline ratio. At present, my country imports about 80×10 4 tons of diesel, while having to export 30×10 4 tons of gasoline in order to balance domestic supply and demand. The light oil product of delayed coking technology has a high diesel-gasoline ratio (1.94 for delayed coking and 0.56...

AI Technical Summary

Problems solved by technology

Chinese patent CN1919439 directly compounded polymethylsiloxane with polyether fatty acid ester and organosilicon compound, which can achieve a defoaming rate of more than 50% in the coking tower, but still has the problem of high silicon content

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 its disadvantage is that the active components are not enough, and the penetration and diffusion in the tower are slow, so it must be processed under high pressure ( 100 ~ 200ppm) to achieve a high defoaming rate, while poor high temperature resistance

[0004] From the existing patent information and the information on delayed coking defoamers on the market, it can be seen that silicon-containing defoamers will inevitably affect the subsequent hydrofining process and the quality of the final light oil product, while non-silicon defoamers have low efficiency , large dosage, low defoaming rate at high temperature, etc.

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