Molecular sieve catalyst, preparation method therefor and application thereof

Patent metadata

Field	Value
Publication number	US-11247198-B2
Application number	US-201716767300-A
Country	US
Kind code	B2
Filing date	Dec 20, 2017
Priority date	Nov 29, 2017
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

The present application discloses a catalyst, the catalyst contains a molecular sieve, there is at least one-dimension 8-membered ring channel in the molecular sieve structure, the diameter of a diffusible substance in the direction of the 8-membered ring channel is no less than 2.0 Å, the diameter of a substance that can be accommodated in the molecular sieve structure is no more than 6 Å; the catalyst is used for a methanol and/or dimethyl ether to propylene reaction, comprising contacting methanol and/or dimethyl ether with a methanol-to-propylene catalyst to obtain propylene.

First claim

The invention claimed is:

1. A method for preparing propylene from methanol and/or dimethyl ether, comprising
bringing methanol and/or dimethyl ether into contact with a methanol to propylene catalyst to obtain propylene;
the methanol to propylene catalyst comprises a catalyst,
wherein the catalyst comprises a molecular sieve with at least one-dimensional 8-membered ring channel in the molecular sieve structure, and the diameter of a sphere that can diffuse along the direction of the 8-membered ring channel is no less than 2.0 Å, the diameter of the sphere that can be included in the molecular sieve structure is no more than 6 Å.

2. The method of claim 1 , wherein the molecular sieve is at least one selected from aluminosilicate molecular sieve, silicoaluminophosphate molecular sieve and transition metal-substituted aluminophosphate molecular sieve.

3. The method of claim 2 , wherein a reaction temperature for bringing methanol and/or dimethyl ether into contact with the methanol to propylene catalyst is in a range of 300° C. to 500° C.

4. The method of claim 2 , wherein a conversion rate of raw material is greater than 75% in the method.

5. The method of claim 2 , wherein a single pass selectivity to propylene is greater than 60% in the method.

6. The method of claim 1 , wherein the molecular sieve structure contains two-dimensional or three-dimensional 8-membered ring channels.

7. The method of claim 1 , wherein the diameter of the sphere that can be included in the molecular sieve structure is in a range of 4.8 Å to 6 Å.

8. The method of claim 1 , wherein a topology of the molecular sieve structure is at least one selected from AFN, DFT, PHI, SIV, THO, APD, CAS, EDI, GIS and VNI.

Assignees

• Dalian Inst Chem & Physics Cas

Inventors

• Yang Miao
• Tian Peng
• Liu Zhongmin
• Li Bing
• Liu Lin
• Sang Shiyun

Classifications

• B01J29/7003

  A-type · CPC title

• B01J29/85 Primary

  Silicoaluminophosphates [SAPO compounds] · CPC title

• C07C11/04

  Ethene · CPC title

• C07C2529/84

  Aluminophosphates containing other elements, e.g. metals, boron · CPC title

• C07C2529/70

  of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65 · CPC title