Coal tar hydrogenation whole-fraction method

A technology for full fraction, coal tar, applied in hydrotreating process, treatment of hydrocarbon oil, petroleum industry, etc., can solve the problems of increasing operating costs, the yield of light oil products needs to be further improved, etc., to improve the utilization rate, increase the The yield of light oil products, the scientific and reasonable effect of the process

Active Publication Date: 2015-03-25
NINGBO RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the coal tar raw material needs to be distilled, which increases

Method used

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  • Coal tar hydrogenation whole-fraction method
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  • Coal tar hydrogenation whole-fraction method

Examples

Experimental program
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Example Embodiment

[0026] Example 1

[0027] A complete distillate of low-temperature coal tar is used as the raw material, and it is recorded as 1# raw material oil. Its properties are shown in Table 1. Coal tar raw material and catalyst 2 are evenly mixed into two slurry bubble column reactors connected in series for hydrocracking reaction. Coal tar raw material, catalyst 2 and hydrogen enter from the bottom of the slurry bubble column reactor and flow out from the top. The properties of 2 are shown in Table 2, and the slurry bubble column hydrogenation process conditions are shown in Table 3. After removing the catalyst 2 from the hydrocracking initial product, it enters the fixed bed reactor for further hydrocracking and hydrofinishing reactions. The initial product enters from the top of the fixed bed reactor, flows out from the bottom, and sequentially passes through the fixed bed hydrocracking catalyst and the addition For the hydrogen refining catalyst, the fixed bed hydrogenation process ...

Example Embodiment

[0028] Example 2

[0029] A total distillate of high-temperature coal tar is used as a raw material, and it is recorded as 2# feedstock oil. Its properties are shown in Table 1. Coal tar raw material and catalyst 2 are evenly mixed and enter three series-connected slurry bubble column reactors to undergo hydrocracking reaction. Coal tar raw material, catalyst 2 and hydrogen enter from the bottom of the slurry bubble column reactor, and flow out from the top. The properties of 2 are shown in Table 2, and the slurry bubble column hydrogenation process conditions are shown in Table 3. After removing the catalyst 2 from the hydrocracking initial product, it enters the fixed bed reactor for further hydrocracking and hydrofinishing reactions. The initial product enters from the top of the fixed bed reactor, flows out from the bottom, and sequentially passes through the fixed bed hydrocracking catalyst and the addition For the hydrogen refining catalyst, the fixed bed hydrogenation pro...

Example Embodiment

[0030] Example 3

[0031] A high-temperature coal tar full distillate and a low-temperature coal tar full distillate were mixed at a mass ratio of 1:1 as the coal tar raw material, which was recorded as 3# feedstock oil. The properties are shown in Table 1. Coal tar raw material and catalyst 2 are evenly mixed and enter three series-connected slurry bubble column reactors to undergo hydrocracking reaction. Coal tar raw material, catalyst 2 and hydrogen enter from the bottom of the slurry bubble column reactor, and flow out from the top. The properties of 2 are shown in Table 2, and the slurry bubble column hydrogenation process conditions are shown in Table 3. After removing the catalyst 2 from the hydrocracking initial product, it enters the fixed bed reactor for further hydrocracking and hydrofinishing reactions. The initial product enters from the top of the fixed bed reactor, flows out from the bottom, and sequentially passes through the fixed bed hydrocracking catalyst and t...

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PUM

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Abstract

The invention relates to a coal tar hydrogenation whole-fraction method, which is composed of a slurry bubble tower hydrogenation method and a fixed bed hydrogenation method. The coal tar hydrogenation whole-fraction method disclosed by the invention comprises the following steps that after being uniformly mixed with a catalyst, coal tar whole fraction is increased in temperature and pressure and then enters a slurry bubble tower reactor to carry out hydrogenation cracking reaction with high-pressure hydrogen; a material from the slurry bubble tower reactor enters a fixed bed reactor after passing through a thermal separator and a decompression separation tower; hydrogenation cracking reaction and hydrogenation refining reaction are further carried out under the action of a catalyst B; a material from the fixed bed reactor is separated into gas and liquid products through a cold separator; gas passes through a circulation hydrogen compressor and is mixed with supplied nitrogen to enter the slurry bubble tower reactor in a circulating manner; a liquid is separated into liquefied gas, naphtha and diesel oil through a fractionating tower; wax oil enters the fixed bed reactor in a circulating manner; and tail oil enters the slurry bubble tower reactor in a circulating manner. The coal tar hydrogenation whole-fraction method disclosed by the invention is scientific and reasonable in process, high in light oil yield, high in operation flexibility, steady to operate and easy to control, and is capable of increasing the utilization rate of coal tar to the most extent.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a method for hydrogenating whole fractions of coal tar. Background technique [0002] Coal tar, also known as coal paste and coal distillate, is a black or dark brown viscous liquid obtained in the process of coal coking. Coal tar is the main raw material of the coal chemical industry, and its components amount to tens of thousands of kinds, mainly containing aromatic hydrocarbons such as benzene, toluene, xylene, naphthalene, anthracene, aromatic oxygen-containing compounds, nitrogen-containing, sulfur-containing, and metal-containing heterocycles Coal tar can be divided into fractions of different boiling point ranges by fractional distillation, including light oil (<170°C), phenol oil (170-210°C), naphthalene oil (210-230°C), washing Oil (230-300°C), anthracene oil (300-360°C) and asphalt (>360°C). [0003] my country is a country with abunda...

Claims

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Application Information

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IPC IPC(8): C10G67/14
CPCC10G67/00C10G2300/10
Inventor 项文裕项裕桥臧未一
Owner NINGBO RES & DESIGN INST OF CHEM IND
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