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Method and system for preparing acrylic low carbon alcohol ester from coal pyrolysis gas

A technology of acrylic acid and carbon alcohol ester, which is applied in the chemical industry and can solve the problems of low utilization rate of coal pyrolysis gas and environmental pollution

Pending Publication Date: 2017-08-18
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of low utilization rate of coal pyrolysis gas and environmental pollution, the present invention provides a method and system for preparing low-carbon alcohol esters of acrylic acid from coal pyrolysis gas

Method used

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  • Method and system for preparing acrylic low carbon alcohol ester from coal pyrolysis gas
  • Method and system for preparing acrylic low carbon alcohol ester from coal pyrolysis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as Figure 1-2 As shown, the high-temperature coal pyrolysis gas from the coal pyrolysis device 8 passes through the oil-gas separation device 1 to remove the tar in the gas, and exchanges heat with the heat exchange device, so that the high-temperature gas is cooled and the heat is used to heat the reactor 7, Then the coal pyrolysis gas after the oil and gas separation is dedusted by the cyclone separation device 2, desulfurized and deoxidized by the purification device 3, and then enters the pressure swing adsorption (PSA) device to further remove the low content of hydrogen and methane in the tail gas to pyrolyze the coal. The gas is further purified to obtain purified CO gas. The obtained purified CO gas is dried by drying device 5 (drying tower), and pressurized to reaction pressure 5.5MPa by compressor 6, enters reactor 7 and passes through catalyst nickel acetate with acetylene and methyl alcohol dissolved in acetone, at 190 °C reaction produces methyl acry...

Embodiment 2

[0058] Such as Figure 1-2 As shown, the high-temperature coal pyrolysis gas from the coal pyrolysis device 8 passes through the oil-gas separation device 1 to remove the tar in the gas, and exchanges heat with the heat exchange device, so that the high-temperature gas is cooled and the heat is used to heat the reactor 7, Then the coal pyrolysis gas after the oil and gas separation is dedusted by the cyclone separation device 2, desulfurized and deoxidized by the purification device 3, and then enters the temperature swing adsorption (TSA) device to further remove the lower hydrogen and methane gas in the tail gas to further purify the tail gas. Further, purified CO gas is obtained. The obtained purified CO gas is dried through the drying device 5 (dryer), pressurized to a reaction pressure of 7.5 MPa with a compressor 6, and enters the reactor 7 with acetylene and n-butanol dissolved in tetrahydrofuran through the catalyst nickel acetate-triphenyl Phosphine complexes react a...

Embodiment 3

[0060] Such as Figure 1-2 As shown, the high-temperature coal pyrolysis gas from the coal pyrolysis device 8 passes through the oil-gas separation device 1 to remove the tar in the gas, and exchanges heat with the heat exchange device so that the high-temperature coal pyrolysis gas is cooled down and the heat is used to feed the reactor 7 heating, and then the coal pyrolysis gas after heat exchange and cooling is dedusted by the cyclone separation device 2, desulfurized and deoxidized by the purification device 3, and then enters the cryogenic separation device to further remove the low content of hydrogen and methane in the tail gas to make the tail gas further Purify, and then obtain purified CO gas. The obtained purified CO gas is dried with a drying device 5 (drying pipe), pressurized to a reaction pressure of 7 MPa by a compressor 6, and enters a reactor 7 and passes through a catalyst nickel chloride-tri-tert-butylphosphine with acetylene dissolved in ethanol , reacted...

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Abstract

The invention relates to a method for preparing low-carbon acrylic acid esters from coal pyrolysis gas, comprising the steps of: cooling the high-temperature coal pyrolysis gas through an oil-gas separation heat exchange device; Solid removal; removal of sulfur and oxygen impurities in the dried tail gas; further purification of coal pyrolysis gas after desulfurization and deoxidation, removal of hydrogen and methane gas in coal pyrolysis gas to obtain purified CO gas; dust removal The moisture in the tail gas is removed, and the dried purified CO gas is pressurized to the reaction pressure; the pressurized CO gas is used as the raw material for carbonylation, and reacts with acetylene and lower alcohols in the reactor to form lower alcohol acrylates. Through the above method, a large amount of carbon monoxide gas in the coal pyrolysis gas is utilized to obtain a low-carbon alcohol ester product of acrylate. In addition, the high-temperature coal pyrolysis gas in the present invention directly exchanges heat with the reactor to heat the reactor while reducing the temperature of the coal pyrolysis gas, effectively utilizing heat and saving costs.

Description

technical field [0001] The invention relates to the field of chemical industry, and more specifically relates to a method for preparing lower-carbon alcohol esters of acrylate from coal pyrolysis gas and a system for implementing the method. Background technique [0002] The coal pyrolysis gas components after low-rank coal pyrolysis are mainly CO and H 2 Mainly, accounting for about 80%. Pyrolysis gas contains a lot of dust, and the furnace dust is sticky, light, fine and difficult to collect. Moreover, pyrolysis gas has its own latent heat and sensible heat, and at the same time has a large amount of dust that is difficult to remove and purify. The traditional gas treatment process is to directly cool the gas to obtain dusty coal tar, and reheat the coal tar for processing, which not only consumes a lot of energy, but also pollutes waste water and residue during the cooling process; or sprays the raw gas with ammonia water to cool down and remove dust, resulting in The ...

Claims

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Application Information

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IPC IPC(8): C07C67/36C07C69/54C01B32/40
CPCC07C67/36C01B2210/0028C01B2210/0053C01B2210/0062C01B2210/0068
Inventor 吴黎阳史雪君余海鹏苏二强黄伟史东军吴道洪
Owner BEIJING HUAFU ENG
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