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Catalyst for directly preparing low-carbon olefin from synthesis gas

A low-carbon olefin and catalyst technology, which is applied in the field of catalysts for directly preparing low-carbon olefins from synthesis gas, can solve the problem of low catalyst selectivity, and achieve the effects of promoting rapid diffusion, avoiding secondary reactions and improving selectivity.

Pending Publication Date: 2020-02-21
杜成荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of catalyst that synthesis gas directly prepares low-carbon olefins, solves the problem that the catalyst selectivity of synthesis gas directly preparing low-carbon olefins that exists in the prior art is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare a catalyst for directly preparing low-carbon olefins from synthesis gas, wherein the active components are iron and cobalt, and the iron element is Fe 2 o 3 , the content is 6%, the cobalt element is tricobalt tetroxide, the content is 4%, accounting for 10% of the weight of the catalyst; the auxiliary agent is manganese, accounting for 30% of the weight of the catalyst, and the manganese element is one or more of manganese oxides; The spherical carrier is selected from Al 2 o 3 , the weight of the spherical carrier accounts for 80% of the weight of the catalyst, the spherical carrier is a non-porous carrier with a spherical or ellipsoidal appearance for the primary particle, the carrier particle size is 1500nm, and the specific surface area of ​​the spherical carrier is 300m 2 g -1 , 65% of pores ≤2nm in the pore size distribution.

[0021] The catalyst is used for syngas catalytic synthesis of low-carbon olefins, and the synthesis gas process parameters ar...

Embodiment 2

[0023] A kind of synthesis gas of the present invention directly prepares the catalyst of low-carbon olefins, wherein, active component is iron and cobalt, accounts for 35% of catalyst weight altogether, and iron element is Fe 3 o 4 , the content is 25%, the cobalt element is tricobalt tetroxide, and the content is 10%; the auxiliary agent is manganese, which accounts for 25% of the catalyst weight, and the manganese element is one or more of manganese oxides; the spherical carrier is selected from TiO 2 , the weight of spherical carrier accounts for 40% of the weight of described catalyzer, and spherical carrier is the nonporous carrier that primary particle has spherical or ellipsoid appearance, and carrier particle size is 1200nm, and the specific surface area of ​​spherical carrier is 400m 2 g -1 , 75% of pores ≤2nm in the pore size distribution.

[0024] The catalyst is used for syngas catalytic synthesis of low-carbon olefins, and the synthesis gas process parameters a...

Embodiment 3

[0026] A catalyst for directly preparing low-carbon olefins from synthesis gas of the present invention, wherein the active components are iron and cobalt, accounting for 30% of the catalyst weight, and the iron element is Fe 2 o 3 , Fe 3 o 4 Both are 10%, and the cobalt element is tricobalt tetroxide, with a content of 20%; the additive is manganese, which accounts for 20% of the catalyst weight, and the manganese element is one or more of manganese oxides; the spherical carrier is activated carbon, and the weight of the spherical carrier is Accounting for 50% of the weight of the catalyst, the spherical carrier is a non-porous carrier with a spherical or ellipsoidal appearance for the primary particle, the particle size of the carrier is 500nm, and the specific surface area of ​​the spherical carrier is 600m 2 g -1 , 80% of pores ≤2nm in the pore size distribution.

[0027] The catalyst is used for syngas catalytic synthesis of low-carbon olefins, and the synthesis gas p...

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Abstract

The invention discloses a catalyst for directly preparing low-carbon olefin from synthesis gas. The catalyst comprises, by weight, 10-50% of an active component comprising iron and cobalt, 5-30% of anauxiliary agent manganese and 20-80% of a spherical carrier comprising one or a plurality of materials selected from Al2O3, TiO2 and active carbon, wherein the spherical carrier is a non-porous carrier with spherical or ellipsoidal primary particles, and the particle size of the carrier is 100-1500 nm. According to the invention, the preparation cost is low; the supported catalyst improves the heat transfer efficiency of the catalyst, so that the problem that heat cannot be dissipated in time to cause the rapid deactivation of the catalyst can be effectively solved; the catalyst can promote the rapid diffusion of the generated low-carbon olefin on the surface of the catalyst to avoid the secondary reaction of the low-carbon olefin, so that the selectivity of the low-carbon olefin is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of low-carbon olefins, in particular to a catalyst for directly preparing low-carbon olefins from synthesis gas. Background technique [0002] Low-carbon olefins include ethylene, propylene, and butene, which are important raw materials for synthetic plastics, fibers, and various chemical materials. At present, light olefins are mainly produced by the petrochemical route of naphtha cracking. [0003] my country is rich in coal resources, and coal is used as raw material to obtain synthesis gas (that is, CO and H 2 mixed gas), and then convert syngas to methanol, and the process of methanol to olefins (MTO) is mature and has entered industrialization. Compared with the indirect route of producing olefins from methanol, the one-step direct method of producing olefins from syngas has the characteristics of simple process and less equipment investment. [0004] The direct production of low-carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/02B01J35/08B01J35/10C07C11/04C07C11/06C07C11/08C07C1/04B01J35/00
CPCB01J23/8892B01J23/002C07C1/044B01J2523/00C07C2523/889B01J35/51B01J35/617B01J35/40B01J35/615B01J2523/31B01J2523/72B01J2523/842B01J2523/845B01J2523/47C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 杜成荣
Owner 杜成荣