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A method and device for producing low-carbon aromatics from methanol

A technology for low-carbon aromatic hydrocarbons and methanol, which is applied in the field of methanol to low-carbon aromatic hydrocarbons and devices, can solve problems such as low comprehensive utilization rate of by-products, and achieve the effect of improving yield and selectivity

Active Publication Date: 2016-08-03
SINOPEC LUOYANG PETROCHEM ENG CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention proposes a method for producing low-carbon aromatics from methanol, which overcomes the defect of low comprehensive utilization rate of by-products in the process of methanol aromatization, and improves the yield and selectivity of the target product aromatics through reuse of by-products

Method used

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  • A method and device for producing low-carbon aromatics from methanol
  • A method and device for producing low-carbon aromatics from methanol
  • A method and device for producing low-carbon aromatics from methanol

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Methanol enters the methanol aromatization fixed bed reactor, and the methanol feed space velocity is 1.0h -1 , the reaction pressure is normal pressure, the reaction temperature is 380 ° C, the catalyst used in the reaction is Zn, and the P compound modified HZSM-5 molecular sieve catalyst with a silicon-alumina ratio of 60, wherein the Zn content is 2%, and the P content is 4%. The oil-phase product obtained from the reaction enters the aromatics extraction unit, separates non-aromatic and mixed aromatics, and the mixed aromatics enters the rectifying device and is further separated into B, T, X and C9+ aromatics, the gaseous products (hydrogen, methane, Ethylene, propane, propylene, isobutane, 1-butene) and the non-aromatic products obtained from the aromatic hydrocarbon extraction unit enter the low-carbon alkane moving bed aromatization reactor together, and the catalyst used in the reaction is that the Zn-modified silicon-aluminum ratio is: 60% ZSM-5 catalyst, whe...

Embodiment 2

[0038] Same as Example 1 except that the reaction temperature of methanol aromatization is 360°C.

[0039] The final product distribution of this process is shown in Table 2:

[0040] Table 2 Composition of reaction products

[0041]

Embodiment 3

[0043] Same as Example 1, but the reaction temperature of methanol aromatization is 400°C.

[0044] The final product distribution of this process is shown in Table 3:

[0045] Table 3 Reaction product composition

[0046]

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Abstract

The invention discloses a method and device for producing low-carbon aromatics from methanol. Methanol is first subjected to an aromatization reaction in an aromatization unit, and the reaction product enters a separator and is separated into low-carbon hydrocarbon gas products, oil phase products, water, and oil phase products. Extraction is carried out in the aromatics extraction unit, and the mixed aromatics and raffinate oil are extracted. The raffinate oil and methanol aromatization product low-carbon hydrocarbon gas enters the moving bed aromatization unit for aromatization, and the gas products generated by the reaction are sent out to the device. The phase product enters the aromatics extraction unit, overcomes the defects of the yield and selectivity of the aromatics in the prior art, and improves the yield and selectivity of the target aromatics.

Description

technical field [0001] The invention relates to a method for aromatic hydrocarbons containing only six-ring aromatic hydrocarbons as ring parts, in particular to a method and device for preparing low-carbon aromatic hydrocarbons from methanol. technical background [0002] Low-carbon aromatics mainly include benzene, toluene, and xylene. Generally referred to as BTX, it is an important basic chemical raw material. Among them, paraxylene (PX) accounts for about 45% of the total consumption of BTX, and about 95% of industrial aromatics production comes from petroleum. In chemical industry, a small amount comes from coal tar processing. In 2010, my country's BTX production was about 14.2 million tons, and the apparent consumption reached 19 million tons. The gap between supply and demand was about 4.8 million tons. The self-sufficiency rate of PX was only 61.6%, and the net import was 3.32 million tons. In order to fill the gap in the aromatic hydrocarbon market and reduce the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/04C07C15/06C07C15/08C07C1/20C07C2/76
CPCY02P20/52Y02P20/584
Inventor 王国良郝代军魏小波韩海波李康毛继平张国良刘雪芬
Owner SINOPEC LUOYANG PETROCHEM ENG CORP
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