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High-temperature-resistant delayed coking defoaming agent and preparation method thereof

A delayed coking and defoaming agent technology, applied in chemical instruments and methods, separation methods, foam dispersion/prevention, etc., can solve the problems of defoamer defoaming and antifoaming performance decline, hydrofining process hazards, etc., to increase dispersion properties, excellent heat resistance and hydrophobicity, the effect of increasing hydrophilicity

Active Publication Date: 2021-05-25
湖北英采化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing defoamer decomposes under high temperature conditions, the antifoaming performance of the defoamer is reduced, and the silicon-based defoamer is precipitated due to high silicon content or demulsification, which often affects the downstream hydrofining process. To solve the technical problem of harm, the present invention provides a kind of defoaming rapidly under high temperature conditions, strong antifoaming ability, not easy to demulsification, and low silicon content, only need to add a small amount of defoaming agent to achieve good antifoaming effect High temperature resistant delayed coking defoamer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-temperature-resistant delayed coking defoamer, characterized in that it comprises the following components in mass percent: 10% modified vinyl cage polysilsesquioxane, 8% branched-chain modified silicone, fatty alcohol Polyoxyethylene ether 2%, medium carbon alcohol 6%, and the rest is solvent.

[0023] Further, the preparation method of the modified vinyl cage polysilsesquioxane comprises the following steps: mixing the isopropanol solution of vinyl cage polysilsesquioxane, modifying agent and chloroplatinic acid Add to the reaction kettle, vacuumize for 30min, under nitrogen protection, react at 70°C for 6h, then add acetylene glycol polyether, perfluoroalkyl alcohol and potassium hydroxide, under nitrogen protection, react for 8h at 60°C , cooled to room temperature to obtain modified vinyl cage polysilsesquioxane.

[0024] Further, the modifying agent is 1,1,1,3,5,5,5-heptamethyl-3-(3-glycidyloxypropyl)trisiloxane.

[0025] Furthermore, the perfluoroalkyl a...

Embodiment 2

[0033] A high-temperature-resistant delayed coking defoamer, characterized in that it comprises the following components in mass percent: modified vinyl cage polysilsesquioxane 11%, branched-chain modified silicone 9%, fatty alcohol Polyoxyethylene ether 2.5%, medium carbon alcohol 7%, and the rest is solvent.

[0034] Further, the preparation method of the modified vinyl cage polysilsesquioxane comprises the following steps: mixing the isopropanol solution of vinyl cage polysilsesquioxane, modifying agent and chloroplatinic acid Add it into the reaction kettle, vacuumize for 32min, under nitrogen protection, react at 72°C for 7h, then add acetylene glycol polyether, perfluoroalkyl alcohol and potassium hydroxide, under nitrogen protection, react at 65°C for 8.5 h, cooled to room temperature to obtain modified vinyl cage polysilsesquioxane.

[0035] Furthermore, the modifying agent is 3-glycidoxy-1,1,3,3-tetramethyldisiloxane.

[0036] Furthermore, the perfluoroalkyl alcohol...

Embodiment 3

[0044] A high-temperature-resistant delayed coking defoamer, characterized in that it comprises the following components in mass percent: 12% modified vinyl cage polysilsesquioxane, 10% branched-chain modified silicone, fatty alcohol Polyoxyethylene ether 3%, medium carbon alcohol 8%, and the rest is solvent.

[0045] Further, the preparation method of the modified vinyl cage polysilsesquioxane comprises the following steps: mixing the isopropanol solution of vinyl cage polysilsesquioxane, modifying agent and chloroplatinic acid Put it into the reaction kettle, vacuumize for 35min, under nitrogen protection, react at 75°C for 8h, then add acetylene glycol polyether, perfluoroalkyl alcohol and potassium hydroxide, under nitrogen protection, react for 9h at 70°C , cooled to room temperature to obtain modified vinyl cage polysilsesquioxane.

[0046] Further, the modifying agent is 3-glycidyloxymethyldiethoxysilane.

[0047] Furthermore, the perfluoroalkylethanol is perfluorooct...

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PUM

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Abstract

The invention belongs to the technical field of defoaming agents, and particularly relates to a high-temperature-resistant delayed coking defoaming agent which is characterized by comprising the following components in percentage by mass: 10-15% of modified vinyl polyhedral oligomeric silsesquioxane, 8-12% of branched chain type modified organic silicon, 2-4% of fatty alcohol-polyoxyethylene ether, 6-10% of medium-carbon alcohol and the balance of a solvent. The invention also provides a preparation method of the high-temperature-resistant delayed coking defoaming agent. The high-temperature-resistant delayed coking defoaming agent disclosed by the invention is rapid in defoaming under a high-temperature condition, strong in foam inhibition capability, not easy to demulsify and low in silicon content, and a good foam elimination and inhibition effect can be achieved only by adding a small amount of the defoaming agent.

Description

technical field [0001] The invention belongs to the technical field of crude oil processing, and in particular relates to a high-temperature resistant delayed coking defoamer and a preparation method thereof. Background technique [0002] Delayed coking is one of the main means of processing heavy oil and residual oil. In the process of coking, a part of heavy oil and residual oil will be converted into resinous intermediate products with high viscosity and low surface tension. A stable foam layer is formed by nucleation. Since the raw material residue contains surface-active components such as asphaltenes and colloids that are enriched with most of the heteroatoms such as sulfur, nitrogen, and oxygen in the crude oil, the foam layer formed in the coke drum is more stable, especially during processing. For heavy oil with high asphaltene and colloid content, the height of the foam layer in the tower is even as high as 7-10m. In order to prevent the foam from carrying coke po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C08G77/46
CPCB01D19/0409B01D19/0404C08G77/46Y02P20/10
Inventor 程晚花刘鹏
Owner 湖北英采化学有限公司