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Process method for effectively adjusting the carbon chain length of mixed alcohol products from syngas

A process method and technology of carbon chain length, which is applied in the field of effectively adjusting the carbon chain length of mixed alcohol products from syngas, can solve problems such as poor stability, harsh catalytic process, poisoning, etc., achieve strong flexibility, easy industrialization, and reduce operating costs Effect

Active Publication Date: 2016-12-07
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of methanol in the product on this type of catalyst is relatively high, but the disadvantage is that the catalytic process is relatively harsh
[0006] (2) The French Institute of Petroleum (IFP) first developed Cu-Co co-precipitated low-carbon alcohol catalysts, with patents US4122110, 4291126 and GB2118061, 2158730. The products synthesized by this catalyst are mainly C 1 -C 6 Linear normal alcohol, the by-product is mainly C 1 -C 6 Aliphatic hydrocarbons, mild reaction conditions (similar to low-pressure methanol synthesis catalysts), but less stable
But the Rh compound is expensive, and the catalyst is easily destroyed by CO 2 Poisoning, its activity and selectivity generally do not meet the requirements of industrial production
[0009] At present, compared with the direct production of low-carbon alcohols from syngas, there are relatively few researches on catalysts for the direct production of high-carbon alcohols from syngas at home and abroad.

Method used

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  • Process method for effectively adjusting the carbon chain length of mixed alcohol products from syngas
  • Process method for effectively adjusting the carbon chain length of mixed alcohol products from syngas
  • Process method for effectively adjusting the carbon chain length of mixed alcohol products from syngas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The catalyst used for the synthesis reaction of mixed alcohols in this example (i.e., the catalyst for synthesizing alcohols) is prepared according to Chinese patent application CN101327435A, and the weight percentages of each metal in the obtained catalyst are as follows:

[0033] Cu: 33.77%, Fe: 43.21%, Mn: 14.20%, Zn: 6.76%, K: 2.06%.

[0034] The reaction device in this example is a fixed bed reactor.

[0035] The catalyst is pressed into tablets and crushed to 40-60 mesh, and loaded into a reaction tube. The filling volume is 1.5ml, diluted with 1.5ml fine quartz sand, and the reducing atmosphere is H 2 , the reduction airspeed is 15000h -1 , the reduction was performed after heating up to 250°C at a rate of 1.2°C / min, and the reduction time was 6h. After the restore process ends, start with N 2 The reactor pressure was back pressured to 6.0MPa, then lowered to 180°C, and the N in the reactor was gradually replaced by syngas 2 , After about 24h, after venting,...

Embodiment 2

[0037] The catalyst for synthesizing alcohol in this example is prepared according to Chinese patent application CN101327435A, and the weight percentage of each metal in the catalyst is Cu: 33.77%, Fe: 43.21%, Mn: 14.20%, Zn: 6.76%, K: 2.06%.

[0038] The reaction device in this example is a fixed bed reactor.

[0039] The catalyst is pressed into tablets and crushed to 40-60 mesh, filled in a reaction tube with a loading volume of 1.5ml, diluted with 2.25ml of fine quartz sand, and the reducing atmosphere is synthetic gas (H 2 , CO, CO 2 mixture), the reduction space velocity is 16000h -1 , the reduction was performed after heating up to 250°C at a rate of 1.5°C / min, and the reduction time was 6h. After the restore process ends, start with N 2 The reactor pressure was back pressured to 6.0MPa, then lowered to 180°C, and the N in the reactor was gradually replaced by syngas 2 , After about 24h, after venting, the reaction began. The reaction conditions are: H in the synth...

Embodiment 3

[0041] The catalyst for synthesizing alcohol in this example is prepared according to Chinese patent application CN101327435A, and the weight percentage of each metal in the catalyst is Cu: 33.77%, Fe: 43.21%, Mn: 14.20%, Zn: 6.76%, K: 2.06%. The reaction device in this example is a fixed bed reactor.

[0042] The catalyst is pressed into tablets and crushed to 40-60 mesh, filled in a reaction tube with a loading volume of 1.5ml, diluted with 1.8ml of fine quartz sand, and the reducing atmosphere is synthetic gas (H 2 , CO, CO 2 mixture), the reduction space velocity is 17000h -1 , the reduction was performed after heating up to 300°C at a rate of 1.6°C / min, and the reduction time was 6h. After the restore process ends, start with N 2 The reactor pressure was back pressured to 6.0MPa, then lowered to 160°C, and the N in the reactor was gradually replaced by syngas 2 , After about 24h, after venting, the reaction began. The reaction conditions are: H in the synthesis gas ...

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Abstract

The invention discloses a method for effectively adjusting carbon chain length of mixed alcohol products prepared by synthetic gas, The method employs a fixed bed reaction apparatus as the reaction apparatus, the method comprises the following steps: 1)compressing a catalyst used for a synthetic reaction of the mixed alcohol and moulding, fragmenting and filling in a reaction tube; 2)in hydrogen or synthetic gas atmosphere, reducing the catalyst used for the synthetic reaction of the mixed alcohol, then cooling to 160-180 DEG C; and 3)introducing synthetic gas and using the catalyst in the step 2) for preparing the mixed alcohol by synthetic gas in the fixed bed reaction apparatus to obtain the mixed alcohol products. The method can effectively control the generation of low carbon products (C1-C5) with short carbon chain or high carbon products (C5+) with long carbon chain by the mixed alcohol products, products distribution controllability of the mixed alcohol is realized, and on-line adjustment can be realized.

Description

technical field [0001] The invention relates to a process method for adjusting the carbon chain length of a mixed alcohol product produced from synthesis gas, in particular to a process method for effectively adjusting the carbon chain length of a mixed alcohol product produced from synthesis gas. Background technique [0002] Energy is an important condition to ensure the sustainable development, security and stability of a country's economy. With the depletion of oil resources, the future energy structure will shift to coal and natural gas. Coal is also the main energy resource in our country. From the perspective of rational and effective utilization of resources, the research on the indirect liquefaction of coal into liquid fuels and downstream chemicals has a very broad application prospect. [0003] The research on the synthesis of mixed alcohols with coal and natural gas as the main raw materials is C 1 One of the important contents of chemistry. The application pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/156C07C29/151C07C31/02C07C31/04
CPCC07C29/151C07C29/156C07C31/04C07C31/02C07C31/08
Inventor 孙予罕魏伟王慧钟良枢夏林谢荣永鲍正洪王新星齐行振房克功林明桂吴秀章卢卫民李克健李晋平孙志强冯永发
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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