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Propylene catalyst prepared from methanol as well as preparation method and application thereof

A technology of catalyst and methanol, which is applied in the field of methanol to produce propylene catalyst and its preparation and application, can solve the problem of many reaction by-products, and achieve the effect of high propylene content and good catalytic stability

Inactive Publication Date: 2010-02-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with SAPO-34, ZSM-5 has larger pores and better anti-coking performance, but its reaction by-products are more, so it must be improved to meet the process requirements of methanol to propylene

Method used

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  • Propylene catalyst prepared from methanol as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0028] SiAl to SiO 2 / Al 2 o 3 The 48 ZSM-5 molecular sieve raw powder was calcined in air atmosphere, the calcining temperature was 540°C, and the calcining time was 6 hours. The obtained ZSM-5 was exchanged with 1 mol / L hydrochloric acid solution, the liquid-solid weight ratio was 10, and the temperature was 70°C, then washed, dried at 105°C, and then calcined at 520°C for 6 hours. According to the weight percentage of 50% H-type molecular sieve and 50% alumina, it is kneaded and shaped, then dried at 105°C for 6 hours, and then calcined in an air atmosphere. The calcining temperature is 520°C and the calcining time is 6 hours. Use an equal volume of calcium nitrate solution to impregnate, then dry at 105°C for 6 hours, and then roast in an air atmosphere. The roasting temperature is 520°C, and the roasting time is 6 hours to obtain a Ca / HZSM-5 catalyst sample C. Its weight composition is Molecular sieve:alumina:Ca=250:250:2, the surface acid measurement results are liste...

Embodiment 2

[0030] SiAl to SiO 2 / Al 2 o 3 The 48 ZSM-5 molecular sieve raw powder was calcined under air atmosphere, the calcining temperature was 750°C, and the calcining time was 1 hour. The obtained ZSM-5 was exchanged with 6 mol / L phosphoric acid solution, the liquid-solid weight ratio was 2, and the temperature was 20°C, then washed, dried at 100°C, and then calcined at 750°C for 1 hour. According to the weight percentage of 35% H-type molecular sieve and 65% alumina, kneading and molding, drying at 100°C for 24 hours, and then calcining in air atmosphere, the calcining temperature is 750°C, and the calcining time is 1 hour. Impregnated with an equal volume of calcium phosphate solution, dried at 100°C for 24 hours, and then calcined in an air atmosphere at a temperature of 750°C for 1 hour to obtain a Ca / HZSM-5 catalyst sample D, whose weight ratio composition Molecular sieve:alumina:Ca=154:286:9, surface acid measurement results are listed in Table 1. Under the same reaction c...

Embodiment 3

[0032] SiAl to SiO 2 / Al 2 o 3 The 48 ZSM-5 molecular sieve raw powder was calcined in an air atmosphere, the calcining temperature was 480° C., and the calcining time was 10 hours. The obtained ZSM-5 was exchanged with 4 mol / L hydrochloric acid solution, the liquid-solid weight ratio was 5, and the temperature was 50°C, then washed, dried at 110°C, and then calcined at 480°C for 10 hours. According to the weight percentage of 90% H-type molecular sieve and 10% alumina, it is kneaded and shaped, then dried at 110°C for 10 hours, and then calcined in an air atmosphere at a calcining temperature of 480°C and a calcining time of 10 hours. Use equal volume of calcium nitrate solution to impregnate, then dry at 110°C for 10 hours, then roast in air atmosphere, the roasting temperature is 480°C, and the roasting time is 10 hours to obtain Ca / HZSM-5 catalyst sample E, its weight composition is Molecular sieve:alumina:Ca=450:50:35, the surface acid measurement results are listed in...

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Abstract

The invention relates to a propylene catalyst prepared from methanol, which consists of molecular sieve, alumina and Ca, and proportion by weight of the molecular to alumina to Ca is 150-450 to 50-300to 1-45.The invention has the advantages of high propylene selectivity, high propylene content in the product and good catalysis stability.

Description

technical field [0001] The invention relates to a catalyst for producing propylene from methanol, a preparation method and application. Background technique [0002] Propylene is the basic organic raw material in the modern chemical industry, and its demand will increase. The traditional route to produce propylene is through cracking of naphtha. The disadvantage of this route is that it is overly dependent on petroleum. The production of low-carbon olefins from methanol uses non-petroleum resources, that is, coal or natural gas as raw materials to produce organic raw materials such as ethylene and propylene through methanol, including MTO technology with ethylene and propylene as the main product and MTP with propylene as the main product. Technology, which breaks through the limitation of oil resources. This technology was originally discovered by the Mobil Company of the United States when studying the methanol-to-gasoline (MTG) catalytic process. By changing the process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/00B01J29/40B01J29/18C07C11/06C07C1/20
Inventor 高志贤张素红张变玲庆绍军韩怡卓胡蕴青李林东董凌曜
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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