Method for propylene preparation through methanol conversion

A technology for methanol conversion and propylene, applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, organic chemistry, etc., can solve the problems of poor catalyst stability and low propylene selectivity, improve catalyst stability, overcome catalyst The effect of poor stability and reduced degree of coking

Inactive Publication Date: 2013-12-04
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 problem to be solved by the present invention is the problem of poor catalyst stability and low propylene selectivity in the existing reaction of methanol conversion to propylene, and a new method for methanol conversion to propylene is provided

Method used

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  • Method for propylene preparation through methanol conversion
  • Method for propylene preparation through methanol conversion

Examples

Experimental program
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Effect test

Embodiment 1

[0015] With tetrapropylammonium bromide as the template, aluminum nitrate as the aluminum source, and silica sol as the silicon source, the raw materials are first molarally mixed with SiO 2 / Al 2 o 3 =200;OH － / SiO 2 =0.3; R / SiO 2 =0.5;H 2 O / SiO 2 = 40 mixed in a ratio of 40, hydrolyzed completely at room temperature, put into a stainless steel reactor, controlled the growth direction of molecular sieve crystals under hydrothermal conditions, and crystallized at 100°C for 60 hours to obtain the molar ratio of silicon to aluminum SiO 2 / Al 2 o 3 NaZSM-5 molecular sieve with a shape index of 200 and a shape index of 50.

[0016] Take by weighing 40 grams of NaZSM-5 molecular sieves prepared above, 25 grams of silica sol (SiO 2 40% by weight), mixed with water, extruded into a mold with a diameter of 1.5mm, dried in the air, placed in an oven at 80°C for 8 hours, baked in a muffle furnace at 600°C for 6 hours, and removed the template agent. It was exchanged three time...

Embodiment 2

[0019] Tetrapropylammonium hydroxide is used as a template, aluminum sulfate is used as an aluminum source, water glass is used as a silicon source, and raw materials are molar ratios of SiO 2 / Al 2 o 3 =500;OH － / SiO 2 =0.05; R / SiO 2 =1.5;H 2 O / SiO 2 = 10, using the method described in Example 1, crystallized at 80°C for 100 hours to obtain the molar ratio of silicon to aluminum SiO 2 / Al 2 o 3 NaZSM-5 molecular sieve with a shape index of 500 and 3.

[0020] Take by weighing 30 grams of NaZSM-5 molecular sieves prepared above, 38 grams of silica sol (SiO 2 40% by weight) and 15 grams of alumina, mixed with water, extruded into a mold with a diameter of 1.5 mm, dried in the air, placed in an oven at 100 ° C for 5 hours, and roasted in a muffle furnace at 600 ° C for 4 hours. The template was removed, exchanged three times in 10% ammonium chloride solution at 85°C, dried and calcined in a muffle furnace at 500°C for 8 hours to obtain a HZSM-5 molecular sieve catalyst...

Embodiment 3

[0023] Tetraethylammonium chloride is used as a template, sodium aluminate is used as an aluminum source, and tetraethyl orthosilicate is used as a silicon source. The raw material is molar ratio of SiO 2 / Al 2 o 3 =800;OH － / SiO 2 =1.5; R / SiO 2 =0.02;H 2 O / SiO 2= 30, using the method described in Example 1, crystallized at 120 ° C for 50 hours, to obtain the molar ratio of silicon to aluminum SiO 2 / Al 2 o 3 NaZSM-5 molecular sieve with a shape index of 800 and a shape index of 10.

[0024] Take by weighing 10 grams of NaZSM-5 molecular sieves prepared above, 32 grams of silica sol (SiO 2 40% by weight) and 10 grams of aluminum phosphate, mixed with water, extruded into a mold with a diameter of 1.5 mm, dried in the air, placed in an oven at 120 ° C for 8 hours, and roasted in a muffle furnace at 500 ° C for 8 hours. The template agent was removed, exchanged three times in 10% ammonium nitrate solution at 80°C, dried and calcined in a muffle furnace at 600°C for 4 h...

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Abstract

The present invention relates to a method for propylene preparation through methanol conversion, wherein problems of poor catalyst stability and not high propylene selectivity in the prior art are mainly solved with the present invention. The technical scheme comprises that: a methanol aqueous solution is adopted as a raw material, a ZSM-5 molecular sieve with a shape index of 3-100 is adopted as a catalyst at a reaction temperature of 400-600 DEG C under reaction pressure of 0.01-5 MPa at a methanol weight space velocity of 0.5-15 h<-1> according to a mass ratio of water to methanol of 0.2-5:1. With the technical scheme, the problems in the prior art are well solved, and the method can be used for industrial production of propylene preparation through methanol conversion.

Description

technical field [0001] The invention relates to a method for producing propylene by converting methanol. Background technique [0002] Propylene is an important basic raw material in the petrochemical industry. Driven by the rapid growth of demand for polypropylene and its derivatives, the demand for propylene will continue to grow at a relatively rapid rate in the next few years. Therefore, propylene is considered to be a product with great market potential . At present, the production methods of propylene at home and abroad all use petroleum as raw material, but my country's petroleum resources are very scarce, and the petroleum reserves and output are far from meeting the needs of the rapid development of the national economy, and the contradiction between supply and demand is very serious. Catalytic production of light olefins (MTO) from methanol and conversion of methanol to propylene (MTP) technologies are the most promising new processes to replace petroleum routes. ...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C1/20B01J29/40
CPCY02P20/52
Inventor 任丽萍滕加伟何万仁李斌
Owner CHINA PETROLEUM & CHEM CORP
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