Coal tar and crude benzene hydrogenated special coke inhibitor and preparation method thereof

A technology of coal tar and low-temperature coal tar, which is applied in the field of coking inhibitor and its preparation, to achieve the effect of inhibiting coking and preventing equipment corrosion

Inactive Publication Date: 2011-02-23
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

However, there is no coking inhibitor specially used in the hydrogenation process of coal tar crude benzene to specifically solve the coking problem of coal tar and crude benzene in the hydrogenation unit of coal coking by-products

Method used

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  • Coal tar and crude benzene hydrogenated special coke inhibitor and preparation method thereof
  • Coal tar and crude benzene hydrogenated special coke inhibitor and preparation method thereof
  • Coal tar and crude benzene hydrogenated special coke inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Use real boiling point distillation to distill a 170-230°C fraction of a crude benzene raw material. -11. Under the condition of hydrogen-to-oil ratio of 200:1, molybdenum-nickel-based catalysts are used to obtain hydrogen-supplying stable component A1 through hydrogenation in a fixed-bed hydrogenation reactor; 5% hydrochloric acid diphosphoric acid is added in a constant temperature stirrer by weight percentage Esters, 30% phenol, 30% liquid alkylated diphenylamine, 30% dienyl succinimide and 5% thiophene were stirred at 50°C for 30 minutes and then cooled to room temperature to obtain anti-coking Component A2: add 45% of the prepared hydrogen-supplying stable component A1 to a constant temperature stirrer, then add 55% of the prepared anti-coking component A2, stir at a constant temperature of 50°C for 60 minutes, and then cool to room temperature That is, the coke suppressor product A-1 was obtained.

Embodiment 2

[0029] Distill a 170-230°C fraction of a low-temperature coal tar raw material by real boiling point distillation. -1 1. Under the condition of hydrogen-to-oil ratio of 350:1, molybdenum-cobalt catalysts are used to hydrogenate in a fixed-bed hydrogenation reactor to obtain hydrogen-supplying stable component B1; 10% triphenyl phosphate is added to the constant temperature stirrer by weight percentage Esters, 10% hydroquinone, 30% ethyl diphenylamine, 40% polyalkenyl succinimide and 10% benzothiophene were stirred at 80°C for 45 min and then cooled to room temperature to obtain a barrier Aggregate anti-coke component B2; add 50% of the prepared hydrogen-supplying stable component B1 to a constant temperature stirrer, then add 50% of the prepared anti-coke component B2, and stir at 80°C for 80 minutes Cool to room temperature to obtain coke suppressant product B-1.

Embodiment 3

[0031] Use true boiling point distillation to distill a 170-230°C fraction of a medium-temperature coal tar raw material, at a pressure of 3.5MPa, a temperature of 230°C, and a space velocity of 2.0h -1 1. Under the condition of hydrogen-to-oil ratio of 500:1, tungsten-nickel catalyst is used to obtain hydrogen-supplying stable component C1 through hydrogenation in a fixed-bed hydrogenation reactor; 10% triisophosphoric acid is added by weight percentage in a constant temperature stirrer Octyl esters, 30% tert-butylcatechol, 10% di-sec-butyl-p-phenylenediamine, 40% polyisobutylene succinimide and 10% dimethyl disulfide, at a constant temperature of 80°C After stirring for 60 minutes, cool to room temperature to obtain the anti-coking component C2; add 55% of the prepared hydrogen-supplying stable component C1 to the constant temperature stirrer, and then add 45% of the prepared anti-coking component C2, Stir at a constant temperature of 80°C for 90 minutes and then cool to roo...

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Abstract

The invention discloses a coal tar and crude benzene hydrogenated special coke inhibitor and a preparation method thereof. The coke inhibitor is formed by mixing two parts, wherein one part is a polymerization inhibiting and coke resisting component which is a mixture of organic phosphorus compound, phenolic compound, amine compound, high molecular weight polyamine and organic sulfide; and the other part is a hydrogen supply stabilizing component which is generated oil obtained by fractionating low-temperature coal tar or crude benzene to obtain a fraction of 170 to 230 DEG C and then selectively hydrogenating the fraction. The coke inhibitor is specially used in the hydrogenation process of inferior raw materials such as coal tar, crude benzene and the like of coal coking byproducts, can effectively inhibit coking and scaling of the inferior raw materials such as coal tar, crude benzene and the like of the coal coking byproducts, prolongs the continuous running period of a hydrogenation device, and promotes the economic benefit.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a coking inhibitor capable of effectively inhibiting coking of crude benzene and coal tar during hydrogenation and a preparation method thereof. Background technique [0002] The rapid development of the world economy has brought huge energy consumption. As a non-renewable natural resource, oil is decreasing day by day, and its price is rising. Energy shortage has become the main factor restricting the development of various countries. my country is rich in coal reserves, and the use of coal coking by-products coal tar and crude benzene hydrogenation can obtain chemical products such as fuel oil and triphenyl to supplement the shortage of petroleum resources, which has considerable economic benefits. 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G75/04
Inventor 郭朝晖佘喜春朱方明
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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