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Coke inhibitor as well as preparation method and use thereof

An organic solvent and compound technology, applied in the field of coke inhibitor and preparation of coke inhibitor, can solve the problems of inability to apply coke inhibition, complex coke mechanism, single component, etc., and achieves low cost, good coke inhibition performance and simple preparation method. Effect

Inactive Publication Date: 2008-08-27
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with raw materials such as petroleum residues and wax oils, coal coking by-products such as coal tar and crude benzene have more complex compositions, poorer properties, and more complex coking mechanisms. The existing developed petroleum coke inhibitors The composition is relatively single and the flexibility is poor, so it cannot be applied to the coking suppression of the hydrogenation process of inferior raw materials such as coal tar and crude benzene, which are by-products of coal coking
At present, the main method to solve the coking problem of coal coking by-products such as coal tar and crude benzene in the hydrogenation unit of inferior raw materials has not been reported in any literature

Method used

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  • Coke inhibitor as well as preparation method and use thereof
  • Coke inhibitor as well as preparation method and use thereof
  • Coke inhibitor as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Diphosphonate, 4,6-dinitro-2-sec-butylphenol, liquid alkylated diphenylamine, polyisobutylene succinimide and heavy aromatics according to 10%, 10%, 10%, 40% % and 20% were added to a container, stirred at 50°C for 30 minutes, then added 10% benzothiophene, continued to stir for 20 minutes, mixed evenly and cooled to room temperature to obtain the coke inhibitor product A-1.

[0025] Coke inhibitor A-1 was tested in the 100ml coal tar hydrogenation test device for coal tar hydrogenation modification. The test raw material is medium and low temperature coal tar produced by a coking plant. The test compares the operation time of the device and the polymer content of the hydrogenated oil when the pressure drop occurs in the bed of the test device with coke suppressor A-1 added to the raw material and without any coke suppressor added to the raw material under the same conditions. The properties and test results of the test raw materials are shown in Table 1 and Table 2, r...

Embodiment 2

[0032] Diphosphonate, hydroquinone, di-sec-butyl-p-phenylenediamine, polyalkenyl succinimide and coal tar hydrogenation oil < 200 ° C fraction according to 8%, 30%, 15%, Add 10% and 30% contents into a container respectively, stir at 60°C for 60 minutes, then add 7% benzothiophene, continue stirring for 15 minutes, mix well and cool to room temperature to obtain coke suppressor product A-2.

[0033] Coke inhibitor A-2 Coal tar hydrogenation upgrading test carried out in 100ml coal tar hydrogenation test device. The test raw material is high-temperature coal tar produced by a coking plant. The test compares the operation time and hydrogenation production time of the test device when the pressure drop occurs in the bed of the test device with coke suppressant A-2 added to the raw material and without any coke suppressor added to the raw material under the same conditions. The polymer content of the oil. The properties and test results of the test raw materials are shown in Tabl...

Embodiment 3

[0040] Hydrogenate triisooctyl phosphate, p-methoxyphenol, dinaphthylamine, high-nitrogen polyisobutylene succinimide and crude benzene to generate oil according to the content of 5%, 10%, 30%, 30% and 20% Add them to a container respectively, stir at 80°C for 40 minutes, then add 5% benzothiophene, continue to stir for 25 minutes, mix well and cool to room temperature to obtain the coke inhibitor product A-3.

[0041] The coke inhibitor A-3 was tested in a 100ml crude benzene hydrogenation test device for hydrogenation modification of crude benzene. The test raw material is the crude benzene raw material produced by a coking plant. The test compares the operation time of the device and the production time when the pressure drop occurs in the bed of the test device with the coke suppressant A-3 added to the raw material and without any coke suppressant added to the raw material under the same conditions. The polymer content of the oil. The properties and test results of the t...

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Abstract

The invention discloses a coke inhibitor and the process for preparation and the application, the coke inhibitor is the mixture which is formed by organophosphorus compound, phenolic compound, amine compound, high molecular weight polymerization amine, organo-sulfur compound and organic solvent. The weight percentage contents are respectively 5-15%, 10-30%, 10-30%, 10-40%, 5-10% and 20-30%. The process for preparing coke inhibitor has the advantages of simple process for preparation, lower production cost, excellent coke inhibiting property, bigger flexibility and wide application scope.

Description

1. Technical field [0001] The invention relates to a coke suppressor, a preparation method and application technology of the coke suppressor, and particularly provides a coke suppressor for suppressing the formation of coke scale in reaction equipment and pipelines, a preparation method and an application. 2. Background technology [0002] With the rapid development of the world economy, oil, as a non-renewable natural resource, is decreasing day by day, and its price is constantly rising. The use of coal coking by-products coal tar and crude benzene hydrogenation to produce chemical products such as fuel oil and triphenyl has low cost and significant benefits, and has become the focus of attention from all walks of life. However, due to the complex composition and poor properties of coal tar and crude benzene, it is very easy to cause coking reactions in the heating furnace, reactor and other equipment and pipelines of the hydrogenation unit at high temperatures, resulting ...

Claims

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Application Information

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IPC IPC(8): C10G75/04C10G9/16
Inventor 郭朝辉佘喜春朱方明李庆华
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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