Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Catalyst for preparing low-carbon olefin from methanol

A technology for the preparation of low-carbon olefins and methanol, applied in the direction of carbon compound catalysts, catalysts, molecular sieve catalysts, etc., can solve the problem of low catalyst selectivity, achieve the effects of reducing coke yield, inhibiting secondary reactions, and optimizing surface acidity

Pending Publication Date: 2020-02-18
杜成荣
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a catalyst for preparing low-carbon olefins from methanol, which solves the problem of low selectivity of catalysts for preparing low-carbon olefins from methanol in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of cobalt-modified silicoaluminophosphate molecular sieve:

[0034] (1) Hydrothermal synthesis: water, phosphorus source, aluminum source, silicon source, templating agent, and cobalt nitrate are uniformly mixed according to the proportion to prepare a crystallization liquid, wherein the mass fraction of cobalt nitrate in the crystallization liquid is 0.6%, Seal the crystallization solution in a crystallization kettle, stir and age for 10 hours to obtain a crystallization product;

[0035] (2) Washing: washing the crystallized product with deionized water to neutrality, centrifuging and drying the resulting solid, that is, the washing product;

[0036] (3) Roasting: The washed product was calcined at a calcination temperature of 800° C. for 5 h to remove the template agent, wherein the heating rate was 2° C. / h to obtain a cobalt-modified SAPO-34 molecular sieve catalyst.

[0037] Weigh the relevant components according to the following ratios to prepare the...

Embodiment 2

[0043] Preparation of cobalt-modified silicoaluminophosphate molecular sieve:

[0044] (1) Hydrothermal synthesis: water, phosphorus source, aluminum source, silicon source, templating agent, cobalt nitrate are uniformly mixed according to the proportion to prepare a crystallization liquid, wherein the concentration of cobalt nitrate in the crystallization liquid is 0.5%. The crystallization solution was sealed in a crystallization tank, stirred and aged for 18 hours to obtain a crystallized product;

[0045] (2) Washing: washing the crystallized product with deionized water to neutrality, centrifuging and drying the resulting solid, that is, the washing product;

[0046] (3) Roasting: The washed product was calcined at a calcination temperature of 700° C. for 4 h to remove the template agent, wherein the heating rate was 3° C. / h to obtain a cobalt-modified SAPO-34 molecular sieve catalyst.

[0047] Weigh the relevant components according to the following ratios to prepare th...

Embodiment 3

[0053] Preparation of cobalt-modified silicoaluminophosphate molecular sieve:

[0054] (1) Hydrothermal synthesis: water, phosphorus source, aluminum source, silicon source, templating agent, cobalt nitrate are uniformly mixed according to the proportion to prepare a crystallization liquid, wherein the concentration of cobalt nitrate in the crystallization liquid is 0.1%. The crystallization solution was sealed in a crystallization kettle, stirred and aged for 24 hours to obtain a crystallization product;

[0055] (2) Washing: washing the crystallized product with deionized water to neutrality, centrifuging and drying the resulting solid, that is, the washing product;

[0056] (3) Roasting: The washed product was calcined at a calcination temperature of 600° C. for 6 h to remove the template agent, wherein the heating rate was 2° C. / h to obtain a cobalt-modified SAPO-34 molecular sieve catalyst.

[0057] Weigh the relevant components according to the following ratios to prepa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a catalyst for preparing low-carbon olefin from methanol. The catalyst consists of the following raw material components in percentage by mass: 25-65% of a cobalt modified silicon-aluminum phosphate molecular sieve, 15-25% of pseudo-boehmite, 10-20% of a phosphorus-containing additive and 10-30% of an alkali oxide, wherein the sum of the percentages of the raw materials is100%. The catalyst has the beneficial effects that (1) the cobalt modified silicon-aluminum phosphate molecular sieve is adopted as an active component, meanwhile, a proper amount of a P additive is further introduced, and thus the catalyst with excellent catalysis performance is prepared; and (2) the pseudo-boehmite is adopted to replace or partially replace clay, so that the surface acidity of the active component and a matrix can be optimized, a reaction that ethylene is generated through dimolecular conversion of methanol molecules is intensified, reactions that propylene and hydrocarbonsof C4 or greater are generated through trimolecular and polymolecular conversion of the methanol are inhibited, and ethylene selectivity of an MTO (methanol to olefin) device can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of low-carbon olefins, and in particular relates to a catalyst for preparing low-carbon olefins from methanol. Background technique [0002] Methanol-to-olefins technology (hereinafter referred to as MTO technology) is a high-end core technology in the field of energy and chemical industry in the world. It uses methanol made from coal or natural gas as a raw material, which is processed and transformed into an important chemical raw material - light olefins (C2-C4) through MTO technology, and then a large number of olefinic chemical products are derived. In view of my country's national conditions of "short of oil, less gas and rich in coal", this is a revolutionary industrial technology to replace oil with coal. [0003] In the prior art, an important class of catalysts for converting methanol into olefins uses silicoaluminophosphate molecular sieve (SAPO) as an active component. In the ear...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J35/10C07C1/20C07C11/04
CPCB01J29/85C07C1/20B01J2229/183C07C2529/85B01J35/60C07C11/04Y02P20/52Y02P30/20Y02P30/40
Inventor 杜成荣
Owner 杜成荣
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com