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Hydrocracking-catalytic cracking combined treatment method for coal tar and residual oil

A catalytic cracking and hydrocracking technology, applied in hydrotreating process, hydrocarbon oil treatment, petroleum industry and other directions, can solve the problems of low yield of light oil, low conversion rate, easy coking, etc. The effect of reducing coking and slowing down the rate of coke formation

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of low-quality residual oil and coal tar that are easy to coke, low conversion rate, low yield and poor quality of light oil by hydrocracking alone in the existing process, the present invention provides a combined treatment method for low-quality residual oil and coal tar

Method used

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  • Hydrocracking-catalytic cracking combined treatment method for coal tar and residual oil
  • Hydrocracking-catalytic cracking combined treatment method for coal tar and residual oil
  • Hydrocracking-catalytic cracking combined treatment method for coal tar and residual oil

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Embodiment 1

[0042] The dry point of light coal tar in the raw material used in the test is 485°C, and the weight ratio of residual oil and light coal tar in the feed to the ebullated bed reactor is 5:1. The test process is as follows: figure 1 shown. Fluidized 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 catalytic cracking catalyst is a catalytic cracking catalyst containing 10w% zeolite molecular sieve, the rest is an aluminum silicate carrier, and the supercritical solvent is gasoline distillate. The reaction conditions, product distribution and product properties are shown in Table 2-Table 5. Part of the vacuum gas oil is recycled back to the ebullating bed reactor, and the weight ratio of vacuum gas oil and residual oil re...

Embodiment 2

[0044] The dry point of light coal tar in the raw material used in the test is 485°C, and the weight ratio of residual oil and light coal tar in the feed to the ebullated bed reactor is 1:1. The test process is as follows: figure 1 shown. Fluidized 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 catalytic cracking catalyst is a catalytic cracking catalyst containing 10w% zeolite molecular sieve, the rest is an aluminum silicate carrier, and the supercritical solvent is a diesel fraction. The reaction conditions, product distribution and product properties are shown in Table 2-Table 5. Part of the vacuum gas oil is recycled back to the ebullating bed reactor, and the weight ratio of vacuum gas oil and residual oil recy...

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Abstract

The invention discloses a hydrocracking-catalytic cracking combined treatment method for coal tar and residual oil. The method includes: subjecting coal tar to pressure reduced distillation so as to obtain light coal tar and heavy coal tar; mixing the light coal tar with the residual oil, then conducting hydrocracking reaction, separating the hydrogenation cracking effluent to obtain a gas and a liquid product, and fractionating the liquid product to obtain gasoline, diesel, pressure reduced gas oil and tail oil; mixing the tail oil obtained by hydrocracking with heavy coal tar, then carrying out catalytic cracking reaction under supercritical conditions so as to obtain cracked gas, light distillate oil, heavy distillate oil and cracking residual oil. The method provided by the invention can improve the conversion rate of raw materials, reduce coking, increase the yield of light oil, extend the depth, slow down the deep condensation reaction of heavy raw material oil in a catalytic cracking device and prolong the service life of a catalytic cracking catalyst, thus providing a processing method for improving the economical efficiency of residual oil and coal tar with low added value.

Description

technical field [0001] The invention relates to a combined treatment process of coal tar and residual oil, in particular to a method for producing light oil through a combined treatment process of coal tar and residual oil hydrocracking-catalytic cracking. Background technique [0002] With the rapid development of the global economy, the continuous improvement of human living standards and the enhancement of environmental awareness, the demand for clean fuel oil is increasing. But at present, the proportion and output of light crude oil available for exploitation are continuously declining, the quality of crude oil is becoming worse and worse, and the quality of residual oil is getting worse and worse. How to effectively use and convert these residual oils to achieve the purpose of producing more light oil products is the current oil refining It is one of the important issues that workers need to solve urgently. [0003] China's energy structure can be summarized as "short...

Claims

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Application Information

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IPC IPC(8): C10G69/00
Inventor 孟兆会陈新杨涛彭绍忠郭蓉曾榕辉贾永忠贾丽
Owner CHINA PETROLEUM & CHEM CORP
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