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Delayed coking high-temperature-resistant defoaming agent and preparation method thereof

A technology of delayed coking and high temperature resistance, applied in the field of defoaming agents, can solve the problems of hydrotreating process hazards, high silicon content, and easy formation of deposits.

Pending Publication Date: 2021-06-18
西安威弗莱环境控制技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the defoamer used in delayed coking decomposes under high temperature conditions, the antifoaming performance of the defoamer is reduced, the silicon content is high, the hydrophobicity is strong, and deposits are easy to form, and the silicon precipitation at high temperature will affect the downstream process. The technical problem of harm caused by the hydrogen refining process, the invention provides a kind of anti-foaming performance that still has good anti-foaming performance under high-temperature conditions, only need to add a small amount of anti-foaming agent to achieve good anti-foaming effect, and does not need Containing polyether chains, low silicon content, good storage stability Delayed coking high temperature resistant defoamer

Method used

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  • Delayed coking high-temperature-resistant defoaming agent and preparation method thereof
  • Delayed coking high-temperature-resistant defoaming agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A delayed coking high-temperature resistant defoamer, characterized in that it comprises the following components in mass percentage: 6% of modified epoxy-based cage polysilsesquioxane, 4% of acrylamide-enoic acid methyl ester copolymer , fatty acid ester 4%, and the rest is solvent.

[0028] Preferably, the preparation method of described modified epoxy cage polysilsesquioxane comprises the steps of:

[0029] Step I, the preparation of the intermediate: add aminosiloxane and 2,2,3,3,4,4-hexafluoro-1,5-pentyl dimethacrylate into anhydrous tetrahydrofuran, nitrogen protection, at 40 Under the condition of ℃, react in the dark for 20h, distill under reduced pressure, then add methylcyclohexyldimethoxysilane, water, isopropanol and dibutyltin dilaurate, react at 30℃ for 6h, concentrate to obtain Intermediate;

[0030] Step II, preparation of modified epoxy cage polysilsesquioxane: adding epoxy cage polysilsesquioxane and the intermediate obtained through the step I to is...

Embodiment 2

[0040] A delayed coking high-temperature-resistant defoamer, characterized in that it comprises the following components in mass percent: 7% of modified epoxy-based cage polysilsesquioxane, 4.5% of acrylamide-enoic acid methyl ester copolymer , fatty acid ester 5%, and the rest is solvent.

[0041] Preferably, the preparation method of described modified epoxy cage polysilsesquioxane comprises the steps of:

[0042] Step I, the preparation of the intermediate: add aminosiloxane and 2,2,3,3,4,4-hexafluoro-1,5-pentyl dimethacrylate into anhydrous tetrahydrofuran, nitrogen protection, at 45 Under the condition of ℃, react in the dark for 22h, distill under reduced pressure, then add methylcyclohexyldimethoxysilane, water, isopropanol and dibutyltin dilaurate, react at 35℃ for 6.5h, concentrate, get intermediates;

[0043] Step II, preparation of modified epoxy cage polysilsesquioxane: adding epoxy cage polysilsesquioxane and the intermediate obtained through the step I to isopr...

Embodiment 3

[0053] A delayed coking high temperature resistant defoamer, characterized in that it comprises the following components in mass percent: 8% of modified epoxy-based cage polysilsesquioxane, 5% of acrylamide-enoic acid methyl ester copolymer , fatty acid ester 6%, and the rest is solvent.

[0054] Preferably, the preparation method of described modified epoxy cage polysilsesquioxane comprises the steps of:

[0055] Step I, the preparation of intermediates: add aminosiloxane and 2,2,3,3,4,4-hexafluoro-1,5-pentyl dimethacrylate into anhydrous tetrahydrofuran, nitrogen protection, at 50 Under the condition of ℃, react in the dark for 24h, distill under reduced pressure, then add methylcyclohexyldimethoxysilane, water, isopropanol and dibutyltin dilaurate, react at 40℃ for 7h, concentrate to obtain Intermediate;

[0056] Step II, preparation of modified epoxy cage polysilsesquioxane: adding epoxy cage polysilsesquioxane and the intermediate obtained through the step I to isopropa...

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Abstract

The invention belongs to the technical field of defoaming agents, and particularly relates to a delayed coking high-temperature-resistant defoaming agent which is characterized by comprising the following components in percentage by mass: 6-10% of modified epoxy polyhedral oligomeric silsesquioxane, 4-6% of an acrylamide-methyl methacrylate copolymer, 4-8% of fatty acid ester and the balance of a solvent. The invention also provides a preparation method of the delayed coking high-temperature-resistant defoaming agent. The invention discloses a delayed coking high-temperature-resistant defoaming agent which still has good defoaming and foam-inhibiting performance under a high-temperature condition, can achieve a good defoaming and foam-inhibiting effect only by adding a small amount of defoaming agent, does not contain polyether chains, and is low in silicon content and good in storage stability.

Description

technical field [0001] The invention belongs to the technical field of defoamers, in particular to a delayed coking high temperature resistant defoamer and a preparation method thereof. Background technique [0002] Delayed coking is an important residual oil processing technology in a refinery. It mainly improves the yield of light oil through deep processing of residual oil and heavy oil. With the trend of crude oil becoming heavier and inferior, delayed coking is increasingly attention of the refinery. During the delayed coking process, because the raw material residue contains some surface active substances, the pyrolyzed oil and gas in the coke tower escapes from the partially cracked raw material, forming a stable foam layer on the upper part of the coke tower. , the foam layer gradually rises, seriously affecting the normal operation of the coke tower. For example, the material entrained by the foam enters the pipeline of the fractionation tower, causing coking, and...

Claims

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Application Information

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IPC IPC(8): C10G9/00B01D19/04C08G77/388C08F220/56C08F230/08
CPCC10G9/00B01D19/0413B01D19/0404B01D19/0495C08G77/045C08F220/56C08F230/085
Inventor 王宏娟秦华卫姚静周应学庄鹏飞
Owner 西安威弗莱环境控制技术有限责任公司
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