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Coking and fouling inhibitor and use method thereof in heavy oil precessing system

An application method and inhibitor technology, applied in the petroleum industry, treatment equipment corrosion/scaling inhibition, hydrocarbon oil treatment, etc., can solve the problems of poor inhibition effect, inability to inhibit coking and fouling, etc., achieve strong coke inhibition effect, reduce Coking fouling, low cost effect

Active Publication Date: 2009-07-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for delayed coking, visbreaking and other high-temperature conditions where low-quality residual oil is used as raw material, the raw material temperature is about 400-500°C, and the pipe wall temperature is as high as nearly 600°C, the above-mentioned coking and fouling inhibitors cannot be used by various The coking and fouling of equipment and pipelines caused by the reasons all have an inhibitory effect, and the inhibitory effect is not good

Method used

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  • Coking and fouling inhibitor and use method thereof in heavy oil precessing system
  • Coking and fouling inhibitor and use method thereof in heavy oil precessing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 20 grams of benzotriazole into a container, raise the temperature to 60°C, and add 50 grams of bis-polyisobutylene succinimide, 2-methyl-4,6-di-tert-butyl 50 grams of base phenol and 80 grams of triphenyl phosphate were stirred at a constant temperature to make them evenly mixed, and then cooled to room temperature. The obtained product was used as a coking and fouling inhibitor, and the code number was ANTI-1.

Embodiment 2

[0037] Add 15 grams of the mixture of tolyl benzotriazole and benzotriazole into a container, raise the temperature to 70°C, and add 15 grams of monopolyisobutylene succinimide, 35 grams of 2 , a mixture of 6-di-tert-butylphenol, 135 grams of triphenyl phosphate and trityl methyl phosphate, continue to stir at a constant temperature to make it evenly mixed, then cool to room temperature, the product obtained is used as a coking and scaling inhibitor, and the number is ANTI-2.

Embodiment 3

[0039] Add a mixture of 90 grams of 2-mercaptobenzotriazole and imidazoline into a container, raise the temperature to 75°C, and add 20 grams of 2,6-di-tert-butylphenol and 2-methyl- A mixture of 4,6-di-tert-butylphenol and 90 grams of triisopropylphenyl phosphate, continue to stir at a constant temperature to make it evenly mixed, and then cool to room temperature. The obtained product is used as a coking and fouling inhibitor, and the number is ANTI- 3.

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PUM

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Abstract

The invention provides a coking scale deposit inhibitor used in a heavy oil processing system, which comprises (A) triphenyl phosphate compound and (B) nitrogenous heterocyclic compound, the weight ratio of the (A) to the (B) is 10:1-1:10, and the inhibitor also comprises one or two of (C) succimide type compound and (D) alkyl phenol compound, and the total content of (C) to the (D) is not more than 50 weight percent of that of the coking scale deposit inhibitor. The invention also provides an application method for the coking scale deposit inhibitor. Compared with the prior art, the coking scale deposit inhibitor can reduce the coking scale deposit of a heavy oil processing system, and has the advantages of stronger inhibition effect, small addition, simple preparation method and lower cost.

Description

technical field [0001] The invention belongs to the technical field of coking and fouling suppression, more specifically, the invention relates to an inhibitor of coking and fouling during heavy oil processing. Background technique [0002] Heavy oil generally refers to the heavy oil produced in the petroleum refining process, mainly including straight-run heavy oil and secondary processed heavy oil. Straight-run heavy oil includes atmospheric residue (generally about >350°C) obtained by topping crude oil to remove light fractions, and vacuum residue after further vacuum distillation. Secondary processed heavy oil refers to the high-boiling point components produced by the processing of certain petroleum fractions, such as pyrolysis tar, thermal cracking residue, catalytic cracking oil slurry, etc. During the heating process, heavy oil will generate different amounts of coke or scale due to heating, which will affect the heat transfer effect, and even cause local overhea...

Claims

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Application Information

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IPC IPC(8): C10G75/00C10G9/16C10G7/06C10G11/00
Inventor 张书红王子军崔德春申海平刘自宾
Owner CHINA PETROLEUM & CHEM CORP
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