Durene-poly-generation technological method and production system for preparing light hydrocarbon through methyl alcohol

A technology of durene and polygeneration, applied in the chemical industry, can solve problems such as difficult control of reaction process and product composition, fixed bed reactor cannot be operated continuously, and stable process conditions cannot be guaranteed, so as to achieve stable and suitable reaction conditions , yield control, and stability improvement effects

Inactive Publication Date: 2015-12-09
CHINA KUNLUN CONTRACTING & ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method of preparing light hydrocarbons from methanol are that the fixed-bed reactor cannot be operated continuously, and the catalyst cokes quickly, requiring frequent regeneration; Poor performance, stable process conditions cannot be guarantee

Method used

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  • Durene-poly-generation technological method and production system for preparing light hydrocarbon through methyl alcohol
  • Durene-poly-generation technological method and production system for preparing light hydrocarbon through methyl alcohol
  • Durene-poly-generation technological method and production system for preparing light hydrocarbon through methyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 (see figure 1 ): The catalyst adopts the THP-1 catalyst developed by CNOOC Tianjin Research Institute of Chemical Industry, the silicon-aluminum ratio is 40, the molecular sieve aperture is 0.4nm, and the particle size is 1.6mm. The methanol etherification reactor is a fixed-bed reactor, and the synthesis reactor is 3-stage moving bed reactor with corresponding regeneration system. The raw material refined methanol and the high-temperature reaction synthesis gas are vaporized after heat exchange, and then heated by the circulating gas and divided into three strands. The main raw material accounting for 70% is sent to the methanol etherification reactor to generate dimethyl ether, which is mixed with the circulating gas and sent to the moving bed first A synthesis reactor, 20% methanol and the synthesis gas from the first synthesis reactor are sent to the second synthesis reactor, 10% methanol is mixed with the synthesis gas from the second synthesis reactor an...

Embodiment 2

[0046] Example 2 (see figure 2 ): The basic conditions are the same as in Example 1, the difference is that the methanol etherification reactor is eliminated, and a one-step method is adopted. After methanol is preheated, it directly enters the moving bed reactor. The process conditions, reaction results and product distribution of hydrocarbon components are shown in the table below.

Embodiment 2

[0047] Implementation example 2 process conditions and reaction result:

[0048]

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PUM

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Abstract

The invention relates to a durene-poly-generation technological method and production system for preparing light hydrocarbon through methyl alcohol. The technological method is adopted for the production system. The technological method includes the steps that multiple moving bed synthesis reactors connected in series form a synthesis reaction system; the methyl alcohol or the water-contained methyl alcohol serves as raw materials and is mixed with circulating gas, then the mixture is introduced into the synthesis reaction system to be subjected to a catalysis reaction, and a reaction product containing the C1-C11 light hydrocarbon is generated; an oil phase in the reaction product is further separated to prepare gasoline blending components and the high-purity durene; the circulating gas serves as heat carriers of heat generated by the reaction, and the synthesis reaction temperature is controlled to control the component distribution of the synthesis reaction product and the yield of the target product to enable the mass ratio of the durene to the hydrocarbon in the reaction product to be larger than or equal to 10%. The system comprises the corresponding synthesis reaction system and the light hydrocarbon separating system. By means of the technological method and production system, continuous production of light hydrocarbon produced through the methyl alcohol and poly-production of the durene and the like is achieved, technological conditions are stable and easy to control, and product quality is good.

Description

technical field [0001] The invention relates to a process method for producing light hydrocarbons from methanol for polygeneration of durene, and also relates to a production system for producing light hydrocarbons from methanol for polygeneration of durene, which belongs to the technical field of chemical industry. Background technique [0002] Crude oil is an important non-renewable resource and a strategic resource related to the national economy and people's livelihood. China is a big consumer of crude oil, and currently imports a large amount of crude oil, and China's dependence on foreign crude oil continues to increase. my country is relatively rich in coal resources. The rapid rise of coal chemical industry in recent years, especially the preparation of fuel gasoline through coal, provides a practical way to alleviate the shortage of oil. Starting from coal, through the intermediate product methanol, gasoline is then synthesized, and by-products are liquefied petrol...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C15/02C07C11/02C07C9/02C10G3/00C10L3/12
CPCY02P20/584Y02P30/20
Inventor 许贤文于海斌丰存礼李利军舒畅黄科臧甲忠郭敬
Owner CHINA KUNLUN CONTRACTING & ENG
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