Coal tar and residuum hydrocracking-delayed coking combination processing method

A delayed coking and hydrocracking technology, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems of high yield of light oil, low yield of light oil, low conversion rate, etc., and achieve Improve the conversion rate, increase the yield of light oil, and reduce the effect of coking

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low-quality residual oil and coal tar that are easily coked by separate hydrocracking, low conversion rate, low yield and poor quality of light oil in the existing technology, the present invention combines low-quality residual oil and coal tar to obtain light oil by vacuum distillation. The high-quality coal tar is mixed together into the ebullating bed reactor for hydrocracking reaction, and the hydrocracking tail oil and the heavy coal tar fraction obtained by vacuum distillation of coal tar are sent together to the coking unit for thermal cracking reaction, and the obtained light oil product yield is High, good product quality

Method used

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  • Coal tar and residuum hydrocracking-delayed coking combination processing method

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Embodiment 1

[0035] The dry point of light coal tar in the raw materials used in the test is 485°C, and the ratio of residual oil to light coal tar is 5:1. The test process is as follows figure 1 shown. Ebullated bed reactor hydrocracking catalyst A tungsten-nickel catalyst supported by alumina, wherein the catalyst contains 6wt% nickel (calculated as NiO) and 12wt% tungsten (calculated as WO 3 calculate). Catalyst particle diameter is 0.5mm, bulk density is 0.79g / cm 3 , the specific surface area is 260m 2 / g. The reaction conditions, product distribution and product properties are shown in Table 2-Table 5. Vacuum gas oil and coking gas oil are partly recycled back to the ebullating bed reactor with a circulation ratio of 0.1.

Embodiment 2

[0037] The ratio of residual oil and light coal tar in the raw material properties used in the test is 1:1, and the test process is as follows: figure 1 shown. Ebullated bed reactor hydrocracking catalyst A tungsten-nickel catalyst supported by alumina, wherein the catalyst contains 6wt% nickel (calculated as NiO) and 12wt% tungsten (calculated as WO 3 calculate). Catalyst particle diameter is 0.5mm, bulk density is 0.79g / cm 3 , the specific surface area is 260m 2 / g. The reaction conditions, product distribution and product properties are shown in Table 2-Table 5. Vacuum gas oil and coking gas oil are partly recycled back to the ebullating bed reactor with a circulation ratio of 0.15.

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Abstract

The invention discloses a coal tar and residuum hydrocracking-delayed coking combination processing method which is as follows: light and heavy coal tar are obtained by reduced pressure distillation of coal tar; the light coal tar is mixed with and residuum, and enters a fluidized bed reactor together with hydrogen to contact a hydrocracking catalyst for hydrocracking reaction, a hydrocracked effluent is separated to obtain a gas and a liquid phase product, gasoline, diesel, vacuum gas oil and tail oil are obtained by fractionation of the liquid phase product; the tail oil and the heavy coal tar together enter a delayed coking unit for thermal cracking reaction to obtain coker dry gas, coker gasoline, coker diesel oil, coker gas oil and coke. The process method can improve the conversion rate of raw materials, reduce coking, increase the yield of light oil, and prolong the device operation cycle, and provides a processing method for low-added-value coal tar and residuum to improve the economical efficiency.

Description

technical field [0001] The invention relates to a coal tar and residual oil combined treatment process, in particular to a coal tar and residual oil hydrocracking-delayed coking combined treatment process. Background technique [0002] With the rapid development of the global economy, the demand for clean fuel oil is increasing. But at present, most of the main oil fields in the world's major oil-producing countries have entered the middle and late stages of development. The quality of crude oil is getting worse and worse, and the quality of corresponding residual oil is also getting worse. How to effectively use these residual oils, especially low-quality residual oils, to realize It is currently an important issue to produce as much light oil as possible to meet the growing demand. [0003] On the other hand, as the proportion of conventional resources such as light crude oil decreases, the proportion of unconventional resources such as coal tar begins to increase. Coal t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 孟兆会杨涛贾丽彭绍忠
Owner CHINA PETROLEUM & CHEM CORP
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