A multi-stage utilization process for producing low-carbon mixed alcohol from coal through synthesis gas

A low-carbon mixed alcohol and synthesis gas technology, applied in the field of multi-stage utilization process, can solve the problems of unsuitable industrialization, difficult to realize, complicated operation and management, etc. Effect

Active Publication Date: 2017-12-15
SEDIN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is difficult to truly realize in industrial production. Obviously, these two processes have cumbersome processes and complicated operation and management, which are not suitable for industrial promotion.

Method used

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  • A multi-stage utilization process for producing low-carbon mixed alcohol from coal through synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Preparation and purification of pure syngas

[0061] Using lignite with a moisture content of 25% as raw material, oxygen and water vapor are introduced into the crude coal gasification (gasification pressure 4.5MPa, gasification temperature 1150°C) to produce crude gas. The composition of the crude gas by volume percentage is: CO: 49.85, H 2 : 24.73, CO 2 : 10.21, CH 4 : 14.82, H 2 S: 0.39;

[0062] The crude gas is subjected to sulfur-tolerant conversion at 250°C, 3.0MPa, Qilu Petrochemical QCS-04 catalyst, and the volumetric space velocity calculated by dry gas is 3800h -1 , the converted water / gas molar ratio is 0.30;

[0063] The converted raw gas and low-carbon alcohol purge gas are separated by PSA for H 2 After the gas enters the low-temperature methanol washing together, it is washed with low-temperature methanol at a temperature of -40°C and a pressure of 4.0 MPa, so that the H 2 S down to 0.1ppm, CO 2 2 S concentrated gas is sent to sulfur recover...

Embodiment 2

[0074] (1) Preparation and purification of pure syngas

[0075] Using lignite with a water content of 28% as the raw material, oxygen and water vapor are introduced into the gasification of crushed coal slag (gasification pressure 5.0 MPa, gasification temperature 1250°C) to obtain crude gas. The composition of the crude gas by volume percentage is: CO: 47.67,H 2 : 24.96, CO 2 : 12.01, CH 4 : 15.02, H 2 S: 0.34;

[0076] The crude gas is subjected to sulfur-resistant transformation under the EB catalyst of Hubei Institute of Chemistry at 290°C, 3.5MPa, and the volumetric space velocity calculated by dry gas is 4500h -1 , the converted water / gas molar ratio is 0.36;

[0077] The converted raw gas and low-carbon alcohol purge gas are separated by PSA for H 2 The exhaust gas enters the low-temperature methanol washing together, and is washed with low-temperature methanol at a temperature of -45°C and a pressure of 5.0 MPa to make H 2 S down to 0.1ppm, CO 2 2 S concentrate...

Embodiment 3

[0088] (1) Preparation and purification of pure syngas

[0089] Using bituminous coal as raw material, oxygen and water vapor are introduced to produce crude gas through pressurized gasification of crushed coal (gasification pressure 5.5MPa, gasification temperature 1200°C). The composition of crude gas by volume percentage is: CO: 48.29, H 2 : 23.83, CO 2 : 13.73, CH 4 : 13.94, H 2 S: 0.21;

[0090] The crude gas is subjected to sulfur-resistant transformation under the catalyst of Qingdao Lianxin QDB-04 at 250°C, 3.0MPa, and the volumetric space velocity calculated by dry gas is 4300h -1 , the converted water / gas molar ratio is 0.35;

[0091] The converted raw gas and low-carbon alcohol purge gas are separated by PSA for H 2 After the gas enters the low-temperature methanol washing together, the H 2 S down to 0.1ppm, CO 2 2 S concentrated gas is sent to sulfur recovery;

[0092] The crude gas washed with low-temperature methanol enters into methane for cryogenic sepa...

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Abstract

The invention relates to a multistage utilization technology for preparing low-carbon mixed alcohol from coal through synthesis gas. A coal gas unit, a synthesis gas preparing and purifying unit, a low-carbon alcohol synthesizing and separating unit, a coal, gas and water separating unit, a crude phenol refining unit and a tar hydrogenating unit are involved. The multistage utilization technology has the advantages of being simple, low in cost and capable of achieving large-scale production.

Description

technical field [0001] The invention relates to a process for producing low-carbon mixed alcohols from synthesis gas, in particular to a multi-stage utilization process for producing low-carbon mixed alcohols from coal through synthesis gas and simultaneously co-producing various chemical products. Background technique [0002] Low-carbon mixed alcohols refer to C1-C6 alcohol mixtures. In terms of performance, low-carbon mixed alcohol is a good gasoline additive, which has high octane number and good blending performance with gasoline, and can completely replace MTBE as a gasoline additive or clean fuel. The production of low-carbon mixed alcohols from coal, etc. through synthesis gas is an important field for the development of carbon-one chemical technology. Therefore, it is not only of great significance to actively develop the technology of coal-based synthesis of low-carbon mixed alcohols. In addition to being used as gasoline additives, low-carbon mixed alcohols can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/151C07C31/04C07C31/08C07C31/10C07C31/12C10M101/00C07C273/08C07C37/68C07C39/04C07C39/07C10G45/00C10J3/00C10L3/08
CPCC07C29/1518C07C29/80C07C37/68C07C273/08C10G45/00C10G45/02C10G2400/02C10G2400/04C10G2400/10C10J3/00C10L3/08C10M101/00C07C31/04C07C31/08C07C31/10C07C31/12C07C39/04C07C39/07
Inventor 赵焰飞马英民曹会博王贵王军亭张永红崔晓曦
Owner SEDIN ENG
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