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Coking demulsifier and preparation method thereof

A technology of demulsifier and corrosion inhibitor, which is applied in the chemical field, can solve the problems of inconspicuous demulsification effect, blockage of filling pipeline, and difficult elimination, etc., and achieve the effect of eliminating emulsification, reducing oil content, and reducing oil content

Inactive Publication Date: 2014-07-30
宜兴汉光高新石化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, due to the inferior quality of processed crude oil, the sulfur content and acid content in crude oil have gradually increased. The medium in the oil-water separation tank at the top of the fractionation tower contains a large amount of substances such as mercaptans, phenols, and naphthenic acids that are decomposed to form emulsification. The effect of the agent can easily cause emulsification in the oil-water separation tank, and the nature of the emulsion is stable and difficult to eliminate
Emulsification leads to a substantial increase in the oil content in the discharged sulfur-containing sewage. A large amount of oily sewage will cause difficulty in oil-water separation in the subsequent sewage stripping unit, increase the sewage treatment capacity, and increase the energy consumption of the device.
[0003] At present, there is no demulsifier for the oil-water separation tank of the fractionation tower of the delayed coking unit. When the emulsification problem is serious, the polymer aluminum used in sewage treatment is often used to promote the dispersion and demulsification of the emulsion and the condensation and stratification of water droplets. In the actual use process, Polymerized aluminum has disadvantages such as large amount of use, difficulty in injection, easy blockage of filling pipeline, and ineffective demulsification effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Get 25% cationic surfactant by mass percentage, 10% dispersant, 10% wetting agent, 20% corrosion inhibitor and 35% water stand-by, described cationic surfactant is epichlorohydrin , Polyethylene polyamine and dimethylamine are synthesized at a molar ratio of 2:0.5:1. First, add dimethylamine and polyethylene polyamine into the water-containing reaction kettle and stir, then continue to drop epichlorohydrin in proportion, and raise the temperature to 90°C, keep the temperature for 1 to 1.5 hours, and then cool down to below 55°C. Stir at normal pressure and below 55°C, pump polyisobutylene, polyoxyethylene alkylphenol ether and ethylenediamine, mix and stir for 1 to 2 hours, then cool down to room temperature and pack in barrels.

Embodiment 2

[0021] Get 30% cationic surfactant by mass percentage, 5% dispersant, 10% wetting agent, 15% corrosion inhibitor and 40% water stand-by, described cationic surfactant is epichlorohydrin , Polyethylene polyamine and dimethylamine are synthesized at a molar ratio of 2:0.5:1. First, add dimethylamine and polyethylene polyamine into the water-containing reaction kettle and stir, then continue to drop epichlorohydrin in proportion, and raise the temperature to 90°C, keep the temperature for 1 to 1.5 hours, and then cool down to below 55°C. Stir at normal pressure and below 55°C, respectively pump polyethylene glycol, polyoxyethylene fatty alcohol ether and imidazoline amide, mix and stir for 1 to 2 hours, then cool down to room temperature and pack in barrels.

Embodiment 3

[0023] Get 35% cationic surfactant by mass percentage, 10% dispersant, 5% wetting agent, 10% corrosion inhibitor and 40% water stand-by, described cationic surfactant is epichlorohydrin , Polyethylene polyamine and dimethylamine are synthesized at a molar ratio of 2:0.5:1. First, add dimethylamine and polyethylene polyamine into the water-containing reaction kettle and stir, then continue to add epichlorohydrin dropwise in proportion, and raise the temperature to 90°C, keep the temperature for 1 to 1.5 hours, and then cool down to below 55°C. Stir at normal pressure and below 55°C, pump polyacrylamide, polyoxyethylene polyoxypropylene block copolymer and mercaptobenzothiazole, mix and stir for 1 to 2 hours, then cool down to room temperature and pack in barrels.

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PUM

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Abstract

The present invention discloses a coking demulsifier, which comprises, by weight, 25-40% of a cationic surfactant, 5-10% of a dispersant, 5-10% of a wetting agent, 10-20% of a corrosion inhibitor, and the balance of water. The present invention further discloses a preparation method for the coking demulsifier. According to the present invention, rapid demulsification of the delayed coking apparatus oil-water separation tank can be achieved, and the oil content in the discharged water can be significantly reduced; the water is clear after demulsification; corrosion of the water body on equipment is reduced; and the coking demulsifier does not contain inorganic ions, and does not affect the existing water system.

Description

technical field [0001] The invention belongs to the field of chemistry, and in particular relates to a coking demulsifier and a preparation method thereof. Background technique [0002] The delayed coking unit is an important means of secondary processing of crude oil. The heavy oil is thermally cracked at a temperature of about 500°C in the coking tower to generate light oil and coke, and the light oil is separated into components by a fractionating tower. In recent years, due to the inferior quality of processed crude oil, the sulfur content and acid content in crude oil have gradually increased. The medium in the oil-water separation tank at the top of the fractionation tower contains a large amount of substances such as mercaptans, phenols, and naphthenic acids that are decomposed to form emulsification. Due to the action of the agent, it is very easy to cause emulsification in the oil-water separation tank, and the nature of the emulsion is stable and difficult to elimi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40B01D17/05
Inventor 顾同新
Owner 宜兴汉光高新石化有限公司
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