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Asphalt substance separated from direct coal liquefaction residues and method and application thereof

A technology of direct coal liquefaction and asphalt, which is applied in the processing of tar pitch/petroleum pitch/natural pitch, processing of tar pitch/petroleum pitch/natural pitch by selective extraction, and the petroleum industry, etc., which can solve complex process and high cost , low product yield and other issues, to achieve the effect of simple preparation process and low cost

Active Publication Date: 2013-09-04
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can obtain liquefied heavy oil and bituminous substances, the two-stage extraction plus two two-stage solid-liquid separations has complicated technological process, single source of raw material extraction solvent and high price, low product yield and high cost. High, and the bituminous substances obtained have a high softening point, low volatile content, poor product development applicability, and are not suitable as raw materials for activated carbon and graphite electrode forming binders, waterproof coils, waterproof coatings, etc.

Method used

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  • Asphalt substance separated from direct coal liquefaction residues and method and application thereof
  • Asphalt substance separated from direct coal liquefaction residues and method and application thereof

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Effect test

Embodiment approach

[0027] According to a typical implementation of the present invention, step S1 includes: S11, mixing the coal direct liquefaction residue and the extraction solvent according to a mass ratio of 1:1-10 to obtain a mixed solution; and S12, passing N into the mixed solution 2 or H 2, and at 0.2-2.0MPa, the temperature of the mixed solution is raised to 60-300°C at 5°C-30°C / h, stirred at a constant temperature, and hot-melt extraction is obtained to obtain a hot-melt extraction mixture; the hot-melt extraction time is 10-60min, constant temperature The stirring rate is 50-300r / min. In the present invention, the coal direct liquefaction residue and the extraction solvent are mixed at a mass ratio of 1:1 to 10 to ensure the extraction effect and solvent recovery rate. If the mass ratio is higher than 1:1, the extraction solvent may not be able to completely extract the coal directly. The dissolution of the liquefaction residue leads to incomplete extraction; if the mass ratio is lo...

Embodiment 1

[0036] 1) Add 250kg of coal direct liquefaction residue and 250kg of distillate oil produced during direct coal liquefaction into the stirring tank, stir at a speed of 50r / min, and fill the stirring tank with N 2 After the pressure in the stirred tank reached 0.2 MPa, the temperature was raised to 60° C. at a rate of 5° C. per hour, stirred at a constant temperature, and subjected to hot-melt extraction for 10 minutes to obtain a hot-melt extraction mixture.

[0037] 2) Separation of solid and liquid from hot solution extraction mixture by means of hot pressure filtration. The primary filtration temperature is 80°C, the filtration pressure is 0.2MPa, and the pore size of the filter core is 50μm. After primary filtration, the primary extract and primary raffinate are collected. Part of the primary extract is sent to the secondary filter for hot-press filtration, the filtration temperature is 300°C, the filtration pressure is 1.0MPa, and the pore size of the filter element is 2...

Embodiment 2

[0041] 1) Add 250kg of coal direct liquefaction residue and 1250kg of distillate oil produced during direct coal liquefaction into the stirred tank, stir at a speed of 300r / min, and fill the stirred tank with N 2 After the pressure in the stirred tank reaches 2.0 MPa, the temperature is raised to 3000° C. at a rate of 30° C. per hour, stirred at a constant temperature, and hot-melted extraction is carried out for 60 minutes to obtain a hot-melted extraction mixture.

[0042] 2) Separation of solid and liquid from hot solution extraction mixture by means of hot pressure filtration. The primary filtration temperature is 150°C, the filtration pressure is 0.02MPa, and the pore size of the filter core is 40μm. After primary filtration, the primary extract and primary raffinate are collected. Part of the primary extract is sent to the secondary filter for hot-press filtration. The filtration temperature is 200°C, the filtration pressure is 101.3MPa, and the pore size of the filter ...

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Abstract

The invention discloses an asphalt substance separated from direct coal liquefaction residues and a method and application thereof. The method comprises the following steps of: S1, mixing the direct coal liquefaction residues and an extraction solvent, and performing thermosol extraction to obtain a thermosol extraction mixture; S2, performing primary solid-liquid separation on the thermosol extraction mixture to obtain primary extraction liquid and primary raffinate; S3, performing secondary solid-liquid separation on part of the primary extraction liquid to obtain secondary extraction liquid and secondary raffinate; and S4, performing solvent recovery on the remaining primary extraction liquid to obtain a first asphalt substrate, and performing solvent recovery on the secondary extraction liquid to obtain a second asphalt substrate, wherein the extraction solvent is the distillate oil produced in a coal liquefaction process. The ash content in the asphalt substrate mixture is low, the volatile components are moderate, and the softening point is higher; and the liquefied heavy oil in the asphalt substrate does not need to be separated, and the asphalt substance can be reasonably utilized as the raw material of carbon materials of different levels according to different properties of mixtures.

Description

technical field [0001] The invention relates to the technical field of deep processing of coal direct liquefaction residues, in particular to bituminous substances separated from coal direct liquefaction residues and its method and application. Background technique [0002] With the rapid development of the national economy, the process of modernization and social development continues to accelerate, my country's consumption of petroleum products continues to grow, greatly exceeding the growth rate of crude oil production during the same period, resulting in an increase in my country's petroleum imports year by year, and has exceeded the natural Yield. However, my country is a country rich in coal and poor in oil. Making full use of abundant coal resources and developing advanced clean coal technologies such as direct coal liquefaction is one of the important ways to reduce the excessive dependence on foreign crude oil and alleviate the shortage of my country's oil resources ...

Claims

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Application Information

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IPC IPC(8): C10C3/08C10C3/00
Inventor 程时富李克健章序文常鸿雁王国栋
Owner CHNA ENERGY INVESTMENT CORP LTD
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