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Combination process for producing aromatic hydrocarbon from synthetic gas

A combined process and synthesis gas technology, which is applied in the production of hydrocarbons from oxygen-containing organic compounds, the preparation of hydroxyl compounds, and the preparation of organic compounds, etc., can solve the problems of declining product market competitiveness, increasing process complexity, and increasing product costs. , to achieve the effect of reducing cooling separation and reheating process, reducing energy consumption and improving economy

Active Publication Date: 2017-03-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of repeated gas circulation and repeated cooling and heating undoubtedly increase the total energy consumption of the process and increase the complexity of the process, which is finally reflected in the increase of product cost and the decline of product market competitiveness

Method used

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  • Combination process for producing aromatic hydrocarbon from synthetic gas
  • Combination process for producing aromatic hydrocarbon from synthetic gas
  • Combination process for producing aromatic hydrocarbon from synthetic gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation of the aromatization catalyst in the fixed bed reactor R2 is performed first. Concentrated sulfuric acid and aluminum sulfate are used to prepare aqueous solution A, wherein the mass ratio of water to concentrated sulfuric acid and aluminum sulfate is 1:0.036:0.012. Water glass, n-butylamine, and sodium hydroxide are used to prepare aqueous solution B, wherein the mass ratio of water to water glass, n-butylamine, and sodium hydroxide is 1:0.457:0.046:0.008. Under stirring conditions, an equal volume of solution A was added dropwise to solution B, and stirring was continued at room temperature for 24 h. Under airtight conditions, the temperature was raised to 110°C, and stirring was continued for 3 hours, then the temperature was raised to 180°C, and stirring was continued for 46 hours. The reaction kettle was taken out, and the product was filtered, washed until neutral, and dried to obtain ZSM-5 sodium molecular sieve. Subsequently, the molecular siev...

Embodiment 2-6

[0026] The catalyst preparation method used in reactor R2 is the same as that in Example 1, and the specific preparation conditions are shown in Attached Table 1. Technological process is identical with embodiment 1 in the reaction process, and concrete technological condition sees attached table 2. The mass content of each component of the reaction product is shown in Attached Table 3.

[0027] Schedule 1

[0028]

[0029] Continued Table 1

[0030]

[0031] Continued Table 1

[0032]

[0033] Continued Table 1

[0034]

[0035] Schedule 2

[0036]

[0037] Continued Table 2

[0038]

[0039] Schedule 3

[0040]

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PUM

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Abstract

The invention relates to a combination process for producing aromatic hydrocarbon from synthetic gas. According to the combination process, synthetic gas is pre-heated, the pre-heated synthetic gas enters a buffer tank and is mixed with circulation gas, the obtained mixed gas enters a fixed bed reactor R1, a methanol synthesis reaction is performed, the outlet gas is cooled and then enters a fixed bed reactor R2, an aromatization reaction is performed, the outlet gas is cooled with a cooler and then enters a gas-oil-water three-phase separator, the separated water phase is discharged and enters a wastewater system, the oil phase is collected as the product, one part of the gas phase is pressurized through a circulation compressor, the pressurized gas phase is heated and then enters the buffer tank, and the other part of the gas is adopted as the Chi-deflated gas. The combination process of the present invention has advantages of low energy consumption, easy operation, and low equipment investment.

Description

technical field [0001] The invention belongs to a process for preparing aromatics from synthesis gas, in particular to a process for directly further preparing aromatics without separation after methanol is prepared from synthesis gas. Background technique [0002] Aromatics such as benzene, toluene, and xylene are widely used in fields such as energy, transportation, materials, daily chemicals, and pesticides. Their industrial production mainly uses petroleum as raw material through aromatics complexes. The development of a process route that uses coal as raw material to produce aromatics through syngas and methanol can effectively reduce the dependence of the aromatics preparation process on petroleum resources, and has good economic value. It is one of the hot research areas of coal chemical industry. The production of aromatics is two important links in the process. [0003] In the existing coal-to-aromatics process, syngas-to-methanol and methanol-to-aromatics are two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C15/04C07C15/06C07C15/08
CPCC07C1/20C07C29/1512C07C2529/40C07C15/04C07C15/06C07C15/08C07C31/04
Inventor 刘平张侃吉可明荀家瑶高俊华宋清文
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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