Method for preparing impregnation pitch using direct coal liquefaction residue, impregnation pitch and application thereof

A technology of direct coal liquefaction and coal liquefaction asphalt, which is applied to processing tar pitch/petroleum pitch/natural pitch by chemical methods, processing tar pitch/petroleum pitch/natural pitch by distillation, and processing tar pitch/petroleum pitch/natural pitch by selective extraction Asphalt and other directions can solve problems not involved in the recovery process of light oil by-products, achieve good market application prospects, mild reaction conditions, and simple preparation process routes

Inactive Publication Date: 2016-08-17
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods both use the direct coal liquefaction residue to be separated by solvent oil filtration, extraction and separation. The patent 2014100212645 is to obtain coal liquefaction pitch with different ash content through different extraction and filtration grades of coal liquefaction residue. ) to prepare modified asphalt with various index properties. Patent 201410020529X uses the principle of cross-linking catalysis to polymerize the obtained coal liquefied asphalt to obtain a modified asphalt. The above two patents do not involve atmospheric air oxidation thermal polymerization (150 ~300℃) and light oil by-product recovery process

Method used

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  • Method for preparing impregnation pitch using direct coal liquefaction residue, impregnation pitch and application thereof
  • Method for preparing impregnation pitch using direct coal liquefaction residue, impregnation pitch and application thereof
  • Method for preparing impregnation pitch using direct coal liquefaction residue, impregnation pitch and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 300Kg coal direct liquefaction residue and 750Kg extraction solvent anthracene oil (distillation range: 300-405°C) into the stirred tank, stir at a speed of 60r / min, fill with N 2 To 0.1MPa, after heating up to 150°C at 10°C to 30°C / h, extract with constant temperature stirring for 30min. The extraction mixture enters the filter for hot-press filtration, the filtration temperature is 150° C., the filtration pressure is 0.3 MPa, and the pore size of the filter core is 30 μm. After filtering, 180Kg of solid filter residue and 867Kg of filtrate were collected.

[0048] The solid filter residue is sent to the stripping unit, and the liquid part is separated from oil and water to obtain 31.7Kg of extraction solvent, which can be recycled to obtain 146.6Kg of solid that can be blended with coal for combustion or gasification.

[0049] The filtrate is sent to a vacuum distillation tower, and part of the extraction solvent is recovered from the top of the tower for recycli...

Embodiment 2

[0052] Add 250Kg coal direct liquefaction residue and 750Kg coal tar (distillation range 150-310°C) into the stirred tank, stir at a speed of 75r / min, fill with N 2 To 0.3MPa, after heating up to 170°C at 10°C-30°C / h, constant temperature stirring and extraction for 45min. The extraction mixture enters the filter for hot-press filtration, the filtration temperature is 120° C., the filtration pressure is 0.4 MPa, and the pore size of the filter core is 40 μm. After filtering, 155Kg of solid residue and 842.8Kg of filtrate were collected.

[0053] The solid filter residue is sent to the stripping unit, and the liquid part is separated from oil and water to obtain 21.7Kg of extraction solvent, which can be recycled to obtain 130.3Kg of solid that can be blended with coal for combustion or gasification.

[0054] The filtrate is sent to the vacuum distillation tower, and the extraction solvent is recovered from the top and side of the tower for recycling, and the coal liquefaction...

Embodiment 3

[0057] Add 200Kg coal direct liquefaction residue and 800Kg washing oil (distillation range 220-405°C) into the stirred tank, stir at a speed of 85r / min, fill with N 2 To 0.15MPa, after heating up to 200°C at a rate of 10°C to 30°C / h, extract with constant temperature stirring for 27min. The extraction mixture enters the filter for thermal vacuum filtration, the filtration temperature is 180° C., the filtration pressure is 2.9 KPa, and the pore size of the filter core is 30 μm. After filtering, 145Kg of solid residue and 849Kg of filtrate were collected.

[0058] The solid filter residue is sent to the stripping unit, and the liquid part is separated from oil and water to obtain 19.7Kg of extraction solvent, which can be recycled to obtain 124.3Kg of solid that can be blended with coal for combustion or gasification.

[0059] The filtrate is sent to the vacuum distillation tower, and the extraction solvent is recovered from the top and the side of the tower for recycling, and...

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Abstract

The invention discloses a method for preparing impregnation pitch using direct coal liquefaction residue, impregnation pitch and application thereof. The method comprises the following steps: (S1) adding an extraction solvent into the direct coal liquefaction residue, and sequentially performing hot-melting extraction, solid-liquid separation, reduced-pressure distillation and solvent recycling treatment to obtain coal liquefaction pitch; and (S2) adding heavy oil into the coal liquefaction pitch, blowing air into a reaction kettle, heating and stirring under normal pressure, and performing a heat polymerization reaction to obtain the impregnation pitch and the recycled light oil byproduct, wherein the heavy oil is anthracene oil, vacuum residue and/or catalytic cracking slurry oil with initial boiling point over 260 DEG C; and the addition volume of the heavy oil is 20-50wt% of the coal liquefaction pitch. The method disclosed by the invention has the advantages of simple technology, mild conditions, conventional equipment and easiness in enlarged production.

Description

technical field [0001] The invention relates to the technical field of deep processing of coal liquefaction residue, in particular to a method for preparing impregnated asphalt by using coal liquefaction residue directly, the impregnated asphalt and its 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 petroleum imports year by year, and has exceeded self-production . 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 re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/00C10C3/02C10C3/04C10C3/06C10C3/08
CPCC10C3/00C10C3/02C10C3/026C10C3/04C10C3/06C10C3/08
Inventor 舒成李克健杨葛灵章序文王洪学程时富
Owner CHNA ENERGY INVESTMENT CORP LTD
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