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Process for producing catalyst for producing propylene with methanol

A technology for producing propylene and catalysts from methanol, which is applied in molecular sieve catalysts, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve problems such as low propylene yield, improve propylene selectivity, shorten the length of diffusion paths, and change methanol Effects of transformation product distribution

Inactive Publication Date: 2009-04-08
CHINA ENERGY GRP NINGXIA COAL IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low propylene yield and low P / E (propylene / ethylene weight) ratio in the prior art, and provide a method for preparing a methanol-to-propylene catalyst

Method used

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  • Process for producing catalyst for producing propylene with methanol
  • Process for producing catalyst for producing propylene with methanol
  • Process for producing catalyst for producing propylene with methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Using ethyl orthosilicate as the silicon source, sodium metaaluminate as the aluminum source, and tetrapropylammonium hydroxide as the template, mix ethylorthosilicate, aluminum metasilicate, tetrapropylammonium hydroxide, and water to form a sol , its weight ratio is: 98.4: 0.24: 0.12: 1.24, the prepared sol was evaporated at 70°C for 10 hours, then put into a crystallization kettle, and crystallized at 170°C for 3 days, the obtained After washing and drying, the product was exchanged twice with 1 mol / L hydrochloric acid solution at 90° C. for two hours each time. Wash, dry and bake at 500°C for 6 hours to obtain a sample. Tablets were pressed and sieved to 20-40 meshes, and evaluated in a fixed-bed reactor. The reaction conditions are methanol and water mixed feed, wherein the catalyst mass is 3 g, methanol is the raw material, and the feed rates are respectively: methanol, 50 mg / min and water, 10 mg / min. The reaction temperature is 470°C, and the gauge pressure of ...

Embodiment 2

[0023] Using silicic acid as the silicon source, aluminum sulfate as the aluminum source, and tetrapropylammonium hydroxide as the template, silicic acid, aluminum sulfate, tetrapropylammonium hydroxide, and water are mixed to form a sol, and the weight ratio is: 90.3:3.95 : 1.18: 4.57, the prepared sol was evaporated at 70°C for 7 hours, then placed in a crystallization kettle, crystallized at 170°C for 4 days, and the obtained product was washed and dried and used in 1 mole The hydrochloric acid solution per liter was exchanged twice at 90°C for two hours each time. Wash, dry and bake at 500°C for 5 hours to obtain a sample. Tablets were pressed and sieved to 20-40 meshes, and evaluated in a fixed-bed reactor. Under the same reaction conditions as in Example 1, its product distribution is shown in Table 1.

Embodiment 3

[0025] With white carbon black as the silicon source, aluminum nitrate as the aluminum source, and tetrapropylammonium bromide as the template, white carbon black, aluminum nitrate, tetrapropylammonium bromide, sodium hydroxide, and water are mixed to form a sol. The ratio is: 88.2: 6.9: 1.2: 0.1: 3.6, the prepared sol was evaporated at 70°C for 7 hours, then placed in a crystallization kettle, and crystallized at 170°C for 2 days, the obtained After washing and drying, the product was exchanged twice with 1 mol / L hydrochloric acid solution at 90° C. for two hours each time. Wash, dry and bake at 500°C for 5 hours to obtain a sample. Tablets were pressed and sieved to 20-40 meshes, and evaluated in a fixed-bed reactor. Under the same reaction conditions as in Example 1, its product distribution is shown in Table 1.

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Abstract

The invention relates to a catalyst for preparing propylene from methanol and a method for preparing the same, which mainly solve the problems that in the prior art, the objective product propylene has low yield and the ratio of P / E (mass ratio of the propylene to ethylene) is low. The method adopts a technical proposal in which small-grain high silicon ZSM-5 zeolite synthesized in an extremely-dense system is used, and an inorganic acid selected from nitric acid, hydrochloric acid, phosphoric acid or sulfuric acid is adopted for exchange and calcination to prepare obtain the required catalyst, and the technical proposal better solves the problems. The obtained catalyst has partial pressure of 50 kPa in the methanol and reaction temperature of 470 DEG C; under the condition that the weight space velocity of the methanol is 1, the yield of the propylene reaches 42 weight percent, and the weight ratio of the propylene to the ethylene reaches more than 8, thus the catalyst can be used in the industrial production of preparing the propylene from the methanol.

Description

technical field [0001] The invention relates to a method for preparing a methanol-to-propylene catalyst. Background technique [0002] Propylene is the basis of petrochemical products and a symbol of a country's petrochemical industry and economic development. With the rapid growth of demand for derivatives such as polypropylene, 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. The current global oil price has risen sharply and future oil resources are facing depletion. It is urgent to develop new energy alternatives and new processes to solve the problems caused by future oil shortages energy crisis. The successful development of MTO and MTP technology can realize the production of olefins (ethylene, propylene) and oxygen-containing compounds (alcohols, ethers, aldehydes, acids, etc.) without petroleum but with methanol as raw material, and then further p...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07C1/20C07C11/06
CPCY02P20/52
Inventor 宋岩窦涛吉向飞孔颖郭兆民
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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