Catalyst for preparing propylene and aromatic hydrocarbons by converting methanol, and preparation method and use thereof

A methanol conversion and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low yield of propylene and aromatics, poor catalyst stability, etc., and achieve good technical effects

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of poor catalyst stability and low yield of propylene and aromatics in the existing methanol conversion reaction to produce propylene and aromatics. A new catalyst for methanol conversion to produce propylene and aromatics is provided. In the reaction of methanol conversion to propylene and aromatics, it has the characteristics of high catalyst stability and high yield of propylene and aromatics

Method used

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  • Catalyst for preparing propylene and aromatic hydrocarbons by converting methanol, and preparation method and use thereof
  • Catalyst for preparing propylene and aromatic hydrocarbons by converting methanol, and preparation method and use thereof
  • Catalyst for preparing propylene and aromatic hydrocarbons by converting methanol, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Tetrapropylammonium bromide is used as template, aluminum nitrate is used as aluminum source, and silica sol is used as silicon source. 2 / Al 2 o 3 =200;OH － / SiO 2 =0.3; R / SiO2 =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.

[0025] Weigh 40 g of the above SiO 2 / Al 2 o 3 200, NaZSM-5 molecular sieve with a shape index of 50, 30 grams of silica sol (SiO 2 40% by weight), mixed with water, extruded into a mold with a diameter of 2.0mm, dried in the air, placed in an oven at 90°C for 10 hours, and baked in a muffle furnace at 550°C for 8 hours to remove the template agent. Exchanged three times in 5% ammonium nitrate ...

Embodiment 2

[0028] 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 50 and 3.

[0029] Weigh 20 g of the above SiO 2 / Al 2 o 3 50, NaZSM-5 molecular sieve with a shape index of 3, 20 grams of silica sol (SiO 2 40% by weight) and 14.8 grams of aluminum phosphate, mixed with water, extruded into strips with a diameter of 1.5 mm, dried, placed in an oven at 120 ° C for 8 hours, and roasted in a muffle furnace at 550 ° C for 8 hours. The template was removed, exchanged three times in 10% hydrochloric acid solution at 80°C, dried and calcined in a muffle furnace at 600°C for 4 hours to obtain a HZSM...

Embodiment 3

[0032] Tetrapropylammonium hydroxide and ammonia water are used as templates, sodium aluminate is used as aluminum source, silica sol is used as silicon source, and raw materials are molar ratio SiO 2 / Al 2 o 3 =300;OH － / SiO 2 =0.08; R / SiO 2 =0.5;H 2 O / SiO 2 = 20, using the method described in Example 1, crystallized at 180°C for 40 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 300 and a shape index of 60.

[0033] Weigh 30 g of the above SiO 2 / Al 2 o 3 NaZSM-5 molecular sieve with a shape index of 300 and 60, 28 grams of silica sol (SiO 2 40% by weight) and 19 grams of alumina, mixed with water, extruded into a mold with a diameter of 2.0 mm, dried in the air, placed in an oven at 100 ° C for 10 hours, and roasted in a muffle furnace at 550 ° C for 6 hours. The template agent was removed, exchanged three times in 10% ammonium chloride solution at 85°C, dried and calcined in a muffle furnace ...

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Abstract

The invention relates to a catalyst for preparing propylene and aromatic hydrocarbons by converting methanol, and a preparation method thereof. The problems of fast inactivation and low yield of propylene and aromatic hydrocarbons of present catalysts in the process for preparing propylene by converting methanol are mainly solved. The catalyst comprises 20-90% of ZSM-5 molecular sieve with the shape index of 3-100 (the shape index is defined as a length ratio of a longest edge to a shortest edge of a molecular sieve crystal in a three dimensional direction), 0.05-3% of a transition metal oxide and 18-69% of a binder. The catalyst provided by the invention well solves the problems, and can be used in the industrial production for preparing propylene and aromatic hydrocarbons by using methanol.

Description

technical field [0001] The invention relates to a catalyst for methanol conversion to produce propylene and aromatic hydrocarbons and its preparation method and application, especially a novel ZSM-5 molecular sieve catalyst, its preparation method and application. Background technique [0002] Methanol is an important organic chemical raw material with wide application and rich sources. In addition to obtaining it from biomass, coal or natural gas is also an important raw material for methanol production. Many sets of methanol production devices using natural gas and coal as raw materials have been built and put into operation in my country , Methanol production is increasing year by year. Regarding the planning and construction of my country's methanol projects, despite the differences in various statistical data, the unanimous conclusion is that the production capacity of methanol will far exceed the actual demand in a relatively short period of time in the future. Carryin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46C07C1/20C07C11/06C07C15/02
CPCY02P20/52
Inventor 滕加伟任丽萍李斌徐建军
Owner CHINA PETROLEUM & CHEM CORP
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