Method for preparing propylene and aromatic hydrocarbon from methyl alcohol or/and dimethyl ether

A technology of dimethyl ether and methanol, applied in chemical instruments and methods, producing hydrocarbons from oxygen-containing organic compounds, ethylene production, etc., can solve problems such as hindering the production of aromatics from methanol, reduced economic benefits, and low-yield aromatics, so as to avoid Effects of high cost, improved economy, and increased yield of aromatics

Inactive Publication Date: 2015-11-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low carbon-based yield of methanol-to-aromatics and the price of aromatics, the industrial application of methanol-to-aromatics technology has been seriously hindered.
[0005] On the other hand, although the production of low-carbon olefins from methanol has been applied industrially, in order to obtain polymer-grade ethylene products, it must undergo cryogenic separation, which increases the energy consumption of the device and reduces the economic benefits.

Method used

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  • Method for preparing propylene and aromatic hydrocarbon from methyl alcohol or/and dimethyl ether
  • Method for preparing propylene and aromatic hydrocarbon from methyl alcohol or/and dimethyl ether
  • Method for preparing propylene and aromatic hydrocarbon from methyl alcohol or/and dimethyl ether

Examples

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Effect test

Embodiment 1

[0035] The SP-34 catalyst was pressed into tablets and crushed and sieved into 40-60 mesh catalyst samples, and 10 grams of the catalyst was loaded into the fixed-bed reactor in the reaction zone A to carry out the methanol or dimethyl ether conversion reaction respectively, methanol and dimethyl ether Mass space velocity is 2h -1 , the reaction temperature is 420°C. The composition of the product was analyzed online by gas chromatography, and the distribution of the product after removing the generated water is shown in Table 1.

[0036] The selectivity of propylene in the hydrocarbon products obtained by methanol or dimethyl ether conversion reaction on the SP-34 catalyst is 45.12wt%, 46.01wt% respectively; C 2 - and C 4 + The selectivities are 54.88wt%, 53.99wt%, respectively, where C 2 ＝ +C 4 ＝ +C 5 ＝ Olefin selectivities were 49.76wt% and 50.00wt% respectively.

[0037] Table 1 Methanol / dimethyl ether produces light olefin reaction result

[0038]

[0039] ...

Embodiment 2

[0054] The SP-34 catalyst is pressed into tablets, crushed and screened into 40-60 mesh catalyst samples, and 10 grams of catalyst is loaded into the fixed-bed reactor in reaction zone A to carry out methanol or dimethyl ether conversion reaction, methanol or dimethyl ether Mass space velocity is 0.5h -1 , the reaction temperature is 350°C. Propylene selectivity in the hydrocarbon product that reaction obtains is respectively 47.28wt%, 48.23wt%; C 2 - and C 4 + The selectivities are 52.72wt%, 51.77wt%, respectively, where C 2 ＝ +C 4 ＝ +C 5 ＝ Olefin selectivities were 47.61wt%, 47.92wt%, respectively.

[0055] The Ga-HZ-5 catalyst was pressed into tablets, crushed and sieved into a catalyst sample of 40-60 mesh, and 10 grams of the catalyst was loaded into a fixed reactor in the reaction zone B. The methanol conversion reaction product distribution in C 2 - components and C 4 + Composition, return to the reaction zone B of the reaction system and contact with the...

Embodiment 3

[0058] The SP-34 catalyst was pressed into tablets and crushed and sieved into 40-60 mesh catalyst samples, and 10 grams of the catalyst was loaded into the fixed-bed reactor in the reaction zone A to carry out the methanol or dimethyl ether conversion reaction respectively, methanol and dimethyl ether Mass space velocity is 8h -1 , the reaction temperature is 500°C. Propylene selectivity is respectively 42.65wt%, 43.14wt% in the hydrocarbon product that reaction obtains; C 2 - and C 4 + The selectivities are 57.35wt%, 56.86wt%, respectively, where C 2 ＝ +C 4 ＝ +C 5 ＝ Olefin selectivities were 51.68wt%, 52.57wt%, respectively.

[0059] The Ga-HZ-5 catalyst was pressed into tablets, crushed and sieved into a catalyst sample of 40-60 mesh, and 10 grams of the catalyst was loaded into a fixed reactor in the reaction zone B. The methanol conversion reaction product distribution in C 2 - components and C 4 + Composition, return to the reaction zone B of the reaction ...

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Abstract

The invention relates to a method for preparing propylene and aromatic hydrocarbon from methyl alcohol or / and dimethyl ether, belonging to the field of chemistry and chemical engineering. The method is carried out according to the following steps: firstly, enabling methyl alcohol or / and dimethyl ether to contact with a catalyst in a reaction system to prepare low-carbon olefin; separating the generated product in a separating system; enabling an ethylene-rich C2<-> component and an olefin-rich C4<+> component obtained through the separating system to return to the reaction system and contact with the catalyst to carry out an aromatization reaction to prepare aromatic hydrocarbon; further separating a C3 component to obtain propylene. According to the method disclosed by the invention, high separation cost for an ethylene product is avoided on one hand, and on the other hand, the efficiency of the aromatic hydrocarbon can be effectively improved by adopting olefin aromatization, and thus the economy of preparing petroleum chemicals from methyl alcohol or / and dimethyl ether can be effectively improved.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and in particular relates to a method for preparing propylene and aromatic hydrocarbons by reacting methanol or / and dimethyl ether. Background technique [0002] Both olefins and aromatics are important basic chemical raw materials, generally called triene triphenyls, trienes include ethylene, propylene and butadiene, triphenyls include benzene, toluene, xylene, referred to as BTX. At present, olefins and aromatics mainly come from petroleum resources. With the rapid development of the global economy, the demand for triene triphenyls as basic chemical raw materials is also increasing year by year. However, the increasing shortage of petroleum resources makes the contradiction between supply and demand more and more prominent. Therefore, The development of triene triphenyl production technology of non-petroleum resources will be an effective way to solve the contradiction. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/06C07C15/04C07C15/06C07C15/08C07C1/20C07C2/00
CPCY02P30/20Y02P30/40
Inventor 许磊毕怡王莹利陈欣
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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