Catalyst for propylene preparation through methanol conversion, and preparation method thereof

A methanol conversion and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of poor catalyst stability and low propylene selectivity, achieve improved catalyst stability, and overcome poor catalyst stability , the effect of reducing the degree of coking

Active 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] One of the technical problems to be solved by the present invention is the problem of poor stability and low propylene selectivity of existing catalysts for methanol conversion to propylene, and a new catalyst for methanol conversion to propylene is provided, which is used for methanol conversion to propylene During the reaction, it has the characteristics of high catalyst stability and high selectivity of product propylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 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 times in 5% ammonium nitrate solution at 90°C, dried and calcined in a muffle furnace at 550°C for 4 hours to obtain a HZSM-5 molecular sieve catalyst with a molar ratio of silicon to aluminum of 200 and a shape index of 50.

[0019] [Example 2]

Embodiment 2

[0021] 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 with a molar ratio of silicon to aluminum of 500 and a shape index of 3.

[0022] [Example 3]

Embodiment 3

[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 hours to obtain a HZSM-5 molecular sieve catalyst with a molar ratio of silicon to aluminum of 800 and a shape index of 10.

[0025] 【Example 4】

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PUM

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Abstract

The present invention relates to a catalyst for propylene preparation through methanol conversion, and a preparation method thereof, wherein problems of poor catalyst stability and not high propylene selectivity in the existing propylene preparation reaction through methanol conversion in the prior art are mainly solved with the present invention. The technical scheme comprises that the catalyst comprises the following components, by weight, a) 30-80% of ZSM-5 having a shape index of 3-100, wherein the shape index is defined as a ratio of the longest edge length to the shortest edge length of the molecular sieve crystal in the three-dimensional direction, and b) 20-70% of a binder. 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 novel ZSM-5 catalyst for converting methanol into propylene and a preparation method thereof. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46B01J29/40C07C11/04C07C11/06C07C9/08C07C9/04C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 任丽萍滕加伟徐建军何万仁
Owner CHINA PETROLEUM & CHEM CORP
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