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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

AI Technical Summary

Problems solved by technology

However, the coal tar raw material needs to be distilled, which increases the operating cost, and the yield of light oil needs to be further improved

Method used

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  • Coal tar hydrogenation whole-fraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The whole distillate of a kind of low-temperature coal tar is used as raw material, which is recorded as 1# raw material oil, and its properties are shown in Table 1. Coal tar raw material and catalyst 2 are evenly mixed and enter two series-connected slurry bubble column reactors 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, and the catalyst The properties of 2 are shown in Table 2, and the process conditions of slurry bubble column hydrogenation are shown in Table 3. The primary product after hydrocracking removes the catalyst 2 and then enters the fixed bed reactor for further hydrocracking and hydrofining reactions. The primary product enters from the top of the fixed bed reactor and flows out from the bottom, passing through the fixed bed hydrocracking catalyst and hydrogenation See Table 3 for the hydrogen refining catalyst and fixed bed hydrogenation ...

Embodiment 2

[0029] A whole distillate of high-temperature coal tar is used as raw material, which is recorded as 2# raw material oil, and its properties are shown in Table 1. Coal tar raw material and catalyst 2 are mixed evenly and enter three series-connected slurry bubble column reactors 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, and the catalyst The properties of 2 are shown in Table 2, and the process conditions of slurry bubble column hydrogenation are shown in Table 3. The primary product after hydrocracking removes the catalyst 2 and then enters the fixed bed reactor for further hydrocracking and hydrofining reactions. The primary product enters from the top of the fixed bed reactor and flows out from the bottom, passing through the fixed bed hydrocracking catalyst and hydrogenation See Table 3 for the hydrogen refining catalyst and fixed bed hydrogenation process c...

Embodiment 3

[0031] A high-temperature coal tar full fraction and a low-temperature coal tar full fraction are mixed at a mass ratio of 1:1 as a coal tar raw material, which is recorded as 3# raw material oil, and its properties are shown in Table 1. Coal tar raw material and catalyst 2 are mixed evenly and enter three series-connected slurry bubble column reactors 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, and the catalyst The properties of 2 are shown in Table 2, and the process conditions of slurry bubble column hydrogenation are shown in Table 3. The primary product after hydrocracking removes the catalyst 2 and then enters the fixed bed reactor for further hydrocracking and hydrofining reactions. The primary product enters from the top of the fixed bed reactor and flows out from the bottom, passing through the fixed bed hydrocracking catalyst and hydrogenation See Table...

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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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