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Preparation method for catalyst for directly preparing low-carbon olefin from synthesis gas

A low-carbon olefin and catalyst technology, which is applied in the field of preparation of low-carbon olefin catalyst directly from synthesis gas, can solve the problem of low catalyst selectivity, achieve rapid diffusion, improve selectivity, and avoid secondary reactions

Pending Publication Date: 2020-02-04
杜成荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method for directly preparing low-carbon olefin catalysts from synthesis gas, which solves the problem of low selectivity of catalysts prepared by the preparation methods existing in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of synthesis gas directly prepares the preparation method of low-carbon olefin catalyst, specifically implements according to the following steps:

[0037] Step 1, the synthesis of thermosetting phenolic resin;

[0038] Step 2, prepare the PVA aqueous solution that PVA mass fraction is 8%;

[0039] Step 3, mixing and stirring the PVA aqueous solution and the thermosetting phenolic resin according to a mass ratio of 2.2:1 to obtain the first solution;

[0040] Step 4, dissolving the active ingredient and the auxiliary agent in water according to the mass ratio of 1.5:1 to obtain a second solution;

[0041] Among them, the active ingredients are iron and cobalt, the auxiliary agent is manganese, and the iron element is Fe 3 o 4 , the cobalt element is tricobalt tetroxide, and the manganese element is Mn 2 o 3 ;

[0042] Step 5, mixing the first solution and the second solution according to a mass ratio of 2.2:1 and performing electrospinning to obtain a catal...

Embodiment 2

[0047] A kind of synthesis gas directly prepares the preparation method of low-carbon olefin catalyst, specifically implements according to the following steps:

[0048] Step 1, the synthesis of thermosetting phenolic resin;

[0049] Step 2, the preparation of PVA mass fraction is 10% PVA aqueous solution;

[0050] Step 3, mixing and stirring the PVA aqueous solution and the thermosetting phenolic resin according to a mass ratio of 1.8:1 to obtain the first solution;

[0051] Step 4, dissolving the active ingredient and the auxiliary agent in water according to the mass ratio of 2:1 to obtain a second solution;

[0052] Among them, the active ingredients are iron and cobalt, the auxiliary agent is manganese, and the iron element is Fe 2 o 3 , Fe 3 o 4 , the cobalt element is tricobalt tetroxide, and the manganese element is Mn 3 o 4 , MnO 2 ;

[0053] Step 5, mixing the first solution and the second solution according to a mass ratio of 2.6:1 and performing electrospi...

Embodiment 3

[0058] A kind of synthesis gas directly prepares the preparation method of low-carbon olefin catalyst, specifically implements according to the following steps:

[0059] Step 1, the synthesis of thermosetting phenolic resin;

[0060] Step 2, preparing PVA mass fraction is the PVA aqueous solution of 12%;

[0061] Step 3, mixing and stirring the PVA aqueous solution and the thermosetting phenolic resin according to a mass ratio of 2.5:1 to obtain the first solution;

[0062] Step 4, dissolving the active ingredient and the auxiliary agent in water according to the mass ratio of 1.8:1 to obtain a second solution;

[0063] Among them, the active ingredients are iron and cobalt, the auxiliary agent is manganese, and the iron element is Fe 2 o 3 , Fe 3 o4 , the cobalt element is tricobalt tetroxide, and the manganese element is Mn 3 o 4 ;

[0064] Step 5, mixing the first solution and the second solution according to a mass ratio of 3.0:1 and performing electrospinning to ob...

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Abstract

The invention discloses a preparation method for a catalyst for directly preparing low-carbon olefin from synthesis gas. The preparation method is implemented according to the following steps: (1) synthesizing thermosetting phenolic resin; (2) preparing a PVA aqueous solution; (3) mixing the PVA aqueous solution and thermosetting phenolic resin to obtain a first solution; (4) dissolving active ingredients and auxiliary agents in water to obtain a second solution; (5) mixing the first solution and the second solution, and carrying out electrostatic spinning to obtain a catalyst matrix; (6) carrying out thermal curing on the catalyst matrix to obtain a curing catalyst matrix; and (7) carbonizing the curing catalyst matrix to obtain the catalyst for directly preparing low-carbon olefin from synthesis gas. The preparation method has the beneficial effects that the preparation process is simple; the prepared catalyst can promote rapid diffusion of generated low-carbon olefin on the surfaceof the catalyst and avoid 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 catalyst preparation, and in particular relates to a preparation method of a catalyst for directly preparing low-carbon olefins from synthesis gas. Background technique [0002] my country is rich in coal resources, and coal is used as raw material to obtain synthesis gas (that is, CO and H 2 Compared with the indirect route of methanol to olefins, the one-step direct synthesis of olefins from synthesis gas has the characteristics of simple process and less equipment investment. [0003] The direct production of low-carbon olefins from syngas refers to syngas (CO and H 2 ) in the process of preparing olefins with a carbon number less than or equal to 4 through Fischer-Tropsch synthesis under the action of a catalyst. Center, inhibit the secondary reaction of low-carbon olefins; improve the dispersion of metal ions, and also have better olefin selectivity. [0004] However, the pore structure of the cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C07C1/04C07C11/04C07C11/06C07C11/08
CPCB01J23/002B01J23/8892C07C1/0445C07C1/044C07C2523/889C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 杜成荣
Owner 杜成荣