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Method of hydrogenation treatment for coal tar by hypercritical solvent

A technology of hydrotreating and coal tar, applied in tar processing through distillation, petroleum industry, refined hydrocarbon oil, etc., can solve problems such as less research on light weight modification, inability to guide industrial production, and easy coking of the process, etc. Achieve the effects of reducing device and operating costs, less environmental pollution, and simple operating steps

Inactive Publication Date: 2007-09-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN1766058A introduces a process for catalytic cracking of coal tar, the hydrogenation reaction is carried out in a suspended bed hydrogenation reactor, but the process is easy to coke and the equipment is complicated
But it is mainly experimental results, not strong in theory, and cannot guide industrial production
So far, there are few studies on the lightening and upgrading of coal tar in other supercritical fluids at home and abroad.

Method used

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  • Method of hydrogenation treatment for coal tar by hypercritical solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Coal tar raw material is added in the reactor, and adding is the catalyst B of the solvent A of 1: 1 and the catalyst B of coal tar raw material 16wt% with coal tar raw material volume ratio; Said solvent A is xylene, and said catalyst B is Ni10 %Mo1%-Y type molecular sieve catalyst; carry out lightening reaction in the presence of hydrogen, the conditions of hydrogenation lightening in the supercritical solvent are: temperature 400 ℃, pressure 8MPa, filling hydrogen pressure is 2MPa, The reaction time is 20 minutes.

[0029] The liquid product from the reactor is separated and the solvent is cut to obtain heavy oil and light oil fractions. The specific steps are to distill the liquid product in the reactor to cut water, light oil, solvent and heavy oil.

[0030] The heavy oil cut out through distillation can continue to be returned to the reactor for reaction.

[0031] Said light oil fraction cut out through distillation solvent can be further refined and cut out gaso...

Embodiment 2

[0033] The coal tar raw material is added in the reactor, and adding is the catalyst B of the solvent A of 1: 1 and the coal tar raw material 16wt% with the coal tar raw material volume ratio; Said solvent A is xylene, and said catalyst B is Pd. .1%Ni10%Mo1%-Y molecular sieve catalyst; carry out lightening reaction in the presence of hydrogen, the conditions of hydrogenation lightening in the supercritical solvent are: temperature 400 ° C, pressure 8MPa, filled with hydrogen pressure It is 2MPa, and the reaction time is 20min.

[0034] The liquid product from the reactor is distilled to cut off heavy oil and light oil fractions, and the specific steps are to distill the liquid product in the reactor to cut off water, light oil, solvent and heavy oil. The heavy oil cut out through distillation can continue to be returned to the reactor for reaction.

[0035] The light oil fraction cut out by distillation can be further refined and cut out gasoline fraction and diesel oil fract...

Embodiment 3

[0037]Coal tar raw material is added in the reactor, and adding is the catalyst B of the solvent A of 1: 1 and the catalyst B of coal tar raw material 2wt% with coal tar raw material volume ratio; Said solvent A is xylene, and said catalyst B is Co5 %Mo0.5%-Y type molecular sieve catalyst; carry out lightening reaction in the presence of hydrogen, the conditions of hydrogenation lightening in the supercritical solvent are: temperature 376 ° C, pressure 7.6MPa, filled with hydrogen pressure It is 2MPa, and the reaction time is 20min.

[0038] The liquid product from the reactor is distilled to cut off heavy oil and light oil fractions, and the specific steps are to distill the liquid product in the reactor to cut off water, light oil, solvent and heavy oil.

[0039] The heavy oil cut out through distillation can continue to be returned to the reactor for reaction.

[0040] The light oil fraction cut out by distillation can be further refined and cut out gasoline fraction and d...

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Abstract

This invention relates to a method for hydroprocessing coal tar with a supercritical solvent, which puts raw coal tar into a reactor and adds a solvent in the volume ratio of 1:1-1:3 to the raw coal tar and a catalyst of 1wt%-18wt% of the raw coal tar to undergo light chemical reaction with hydrogen, then the liquid from the reactor is distilled and cut to get water, solvent, masout and light crude fractions, which turns raw coal tar to light and combines with supercritical fluit to reduce inactivation of catalysts to increase the production rate of light crude and takes a solvent to replace water to react under the supercritical state to reduce operation temperature and pressure.

Description

technical field [0001] The invention relates to a process for treating coal tar, in particular to a method for producing light oil by using high-temperature coal tar as a raw material, using a self-made catalyst, and using a supercritical solvent hydrogenation process. Background technique [0002] Coal tar is a black or dark brown viscous liquid product with pungent odor obtained during carbonization and gasification of coal, and is the main source of many condensed ring compounds and heterocyclic compounds containing O, N, and S. Depending on the carbonization temperature and method, the following tars can be obtained: low temperature (450-650°C) carbonization tar; low and medium temperature (600-800°C) producer tar; medium temperature (900-1000°C) vertical furnace tar; high temperature (1000°C) coking tar. [0003] my country's energy structure can be summarized as "short of oil", "less gas" and "rich in coal". Since the energy crisis, the price of heavy oil has been on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/00C10C1/14
Inventor 顾兆林常娜李云
Owner XI AN JIAOTONG UNIV
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