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Reaction method of syngas to methanol and aromatics methylation in series

A technology for synthesis gas and methanol production, which is applied in chemical instruments and methods, condensation between hydrocarbons and non-hydrocarbons, preparation of hydroxyl compounds, etc. It can solve the problems of poor catalyst stability, difficult operation, and low utilization rate of raw materials. Achieve the effects of improving stability, prolonging catalyst life, and good technical effects

Active Publication Date: 2016-07-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention are problems such as low raw material utilization rate, poor catalyst stability and difficult operation in the existing aromatic hydrocarbon alkylation production.

Method used

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  • Reaction method of syngas to methanol and aromatics methylation in series
  • Reaction method of syngas to methanol and aromatics methylation in series
  • Reaction method of syngas to methanol and aromatics methylation in series

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] in such as figure 1 In the shown reaction device, hydrogen and carbon monoxide are used as raw materials in the first reactor, toluene is used as aromatic hydrocarbon raw material in the second reactor, the effluent of the first reactor is used as the alkylating agent, and hydrogen is used as the carrier gas. Two hours after the reaction ran smoothly, samples were taken for analysis. The specific evaluation conditions and data results are listed in Table 1.

[0022] The conversion rate of aromatics in Table 1 is the conversion rate of toluene. The xylene selectivity refers to the ratio of xylene products in all aromatic products. The calculation is based on the composition of aromatics in the product. The formula is as follows:

[0023]

[0024]

[0025]

[0026] Table 1

[0027]

Embodiment 2

[0029] in such as figure 1 In the shown reaction device, hydrogen and carbon monoxide are used as raw materials in the first reactor, toluene is used as aromatic hydrocarbon raw material in the second reactor, the effluent of the first reactor is used as the alkylating agent, and hydrogen is used as the carrier gas. Two hours after the reaction ran smoothly, samples were taken for analysis. The specific evaluation conditions and data results are listed in Table 2.

[0030] Table 2

[0031]

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Abstract

The invention relates to a series reaction method of methanol preparation from synthetic gas and methylation of aromatic hydrocarbons, which mainly solves the problems of low raw material utilization ratio, poor catalyst stability, great operation difficulty and the like in the existing aromatic hydrocarbon alkylation production. The method comprises the following steps: a) the raw material synthetic gas contacts a hydrogenation catalyst through a first reactor to form a methanol-containing alkylate stream I; b) the alkylate stream I is at least divided into two flows, wherein one flow is mixed with a toluene and / or benzene-containing aromatic hydrocarbon stream II and flows in from a first position of a second reactor to contact an alkylation catalyst, and the other flow and the stream above are introduced through more than one position downstream the first position of the second reactor; c) an outlet stream III of the second reactor is separated to obtain a gas-phase stream IV, an oil-phase stream V and a water-phase stream VI; d) the stream IV is circulated to the reactor for reutilization; e) the stream V is separated into light hydrocarbons, benzene, toluene and C8+ aromatic hydrocarbons, and the benzene and toluene are circulated to the second reactor; and f) the stream VI is treated and discharged. The technical scheme solves the technical problems, and can be used for industrial production of paraxylene.

Description

technical field [0001] The invention relates to a reaction method in which synthesis gas produces methanol and aromatic hydrocarbon methylation is connected in series. Background technique [0002] As an important raw material for organic synthesis, p-xylene is widely used in the fields of textile and packaging materials. It is mainly used to prepare terephthalate and terephthalic acid as intermediates for plastics and polyester fibers, as well as coatings, dyes and pesticides. raw materials. At present, the most commonly used p-xylene production method in industry is disproportionation of toluene and transalkylation of C9 aromatic hydrocarbons. Due to the limitation of thermodynamic equilibrium, the C8 aromatic hydrocarbon products obtained by this method usually only contain about 24% p-xylene, while This concentration composition is far from meeting the needs of industrial polyester material production. In order to obtain high-concentration p-xylene and increase the yie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/86C07C15/08C07C31/04C07C29/151
Inventor 孔德金夏建超邹薇姜丽燕
Owner CHINA PETROLEUM & CHEM CORP