Process for preparing propylene from methanol

A methanol-to-propylene technology, which is applied in the production of hydrocarbons from oxygen-containing organic compounds, molecular sieve catalysts, organic chemistry, etc., can solve the problems of propylene single-pass selectivity, low P/E, and high production cost, and achieve improved propylene selectivity , shorten the service life, improve the effect of P/E ratio

Active Publication Date: 2011-10-12
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of low propylene single-pass selectivity and P/E ratio and high production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0034] A two-stage fixed-bed reaction is adopted, the catalyst used in the first stage reactor is manganese modified ZSM-5 molecular sieve catalyst, and the catalyst used in the second stage reactor is manganese element modified ZSM-5 molecular sieve catalyst.

[0035] The ZSM-5 molecular sieve catalyst modified by manganese element in this example is prepared by the following method: take 10 g of ZSM-5 molecular sieve powder (grain size 1 μm) with a silicon-aluminum molar ratio of 200 and 1 mol / L ammonium nitrate solution 100mL was treated at 80°C for 5 hours, washed and dried, and then calcined at 550°C for 6 hours to obtain hydrogen-type ZSM-5 molecular sieves; hydrogen-type molecular sieves were treated in 20mL of manganese acetate aqueous solution at 80°C for 12 hours, in which acetic acid The concentration of manganese is 0.15mol / L, then filtered, washed with water, dried at 110°C, and then calcined at 500°C for 4 hours; then mixed with silica sol, extruded and calcined a...

Embodiment 6～10

[0043] A two-stage fixed-bed reaction is adopted, and the catalyst used in the first stage reactor is Al 2 o 3 Catalyst, the catalyst used in the second stage reactor is manganese modified ZSM-5 molecular sieve catalyst.

[0044] The manganese-modified ZSM-5 molecular sieve catalyst in this example is prepared by the following method: take 10 g of ZSM-5 molecular sieve raw powder (grain size 0.5 μm) with a silicon-aluminum molar ratio of 10 and 1 mol / L ammonium nitrate 100mL of the solution was treated at 80°C for 5 hours, washed and dried, and then roasted at 550°C for 6 hours to obtain a hydrogen-type ZSM-5 molecular sieve; the hydrogen-type molecular sieve was treated in 20mL of manganese acetate aqueous solution at 80°C for 12 hours, wherein The concentration of manganese acetate is 0.10mol / L, then filtered, washed with water, dried at 110°C, and then calcined at 500°C for 4 hours; then mixed with silica sol, extruded and calcined at 550°C for 6 hours , to obtain a shape...

Embodiment 11～15

[0052] A two-stage fixed-bed reaction is adopted, the catalyst used in the first stage reactor is manganese modified ZSM-5 molecular sieve catalyst, and the catalyst used in the second stage reactor is manganese element modified ZSM-5 molecular sieve catalyst.

[0053] The ZSM-5 molecular sieve catalyst modified by manganese element in this example is prepared by the following method: take 10 g of ZSM-5 molecular sieve powder (grain size 1.5 μm) and 1 mol / L ammonium nitrate with a silicon-aluminum molar ratio of 600 100mL of the solution was treated at 80°C for 5 hours, washed and dried, and then roasted at 550°C for 6 hours to obtain a hydrogen-type ZSM-5 molecular sieve; the hydrogen-type molecular sieve was treated in 20mL of manganese acetate aqueous solution at 80°C for 12 hours, wherein The concentration of manganese acetate is 0.10mol / L, then filtered, washed with water, dried at 110°C, and then calcined at 500°C for 4 hours; then mixed with silica sol, extruded and calc...

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Abstract

The invention discloses a process for preparing propylene from methanol. In the process, the methanol is used as a raw material, water is used as a diluent, and a two-section type fixed bed is adopted for reaction, wherein a catalyst used in the process for preparing the propylene from the methanol is a manganese modified ZSM-5 molecular sieve catalyst. By using the process for preparing propylene from methanol, the selectivity of propylene and a P/E ratio are effectively improved, the conversion rate of raw material, namely methanol can maximally reach above 99%, and the one-path selectivity of propylene is larger than 47%.

Description

technical field [0001] The invention relates to a methanol-to-propylene process. Background technique [0002] Propylene is an important organic chemical raw material. With the rapid growth of demand for polypropylene and other derivatives, the demand for propylene is also increasing year by year. The traditional propylene production process requires a large supply of crude oil or liquefied petroleum gas. As petroleum is a non-renewable resource However, most of the crude oil used in our country is imported, so it is urgent to develop new energy substitutes and new processes to solve the energy crisis caused by the future oil shortage. [0003] Methanol is currently the most promising non-petroleum route resource. It has a wide range of sources and can be obtained from natural gas and coal conversion. The development of its follow-up chemical route has become a subject of common concern in academia and industry. It is a very important industrial catalytic reaction in the hi...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C1/20B01J29/48
CPCY02P20/52
Inventor 张陆旻李海波沈雪松曾义红李彩云
Owner SHANGHAI HUAYI GRP CO
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