Catalyst for preparing high-carbon olefin from synthesis gas as well as preparation method and application thereof

A technology of high-carbon olefins and catalysts, which is applied in the field of catalysts and preparations of high-carbon olefins from syngas, can solve the problems of high difficulty in industrial application, difficult product separation, easy carbon deposition and deactivation, etc., and achieve good industrial application prospects, Increased diffusion rate and low catalyst cost

Active Publication Date: 2020-04-24
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing high-carbon olefin catalysts have the problems of easy carbon deposition and deactivation, short life, high cost, low selectivity, difficult product separation, and high difficulty in industrial application

Method used

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  • Catalyst for preparing high-carbon olefin from synthesis gas as well as preparation method and application thereof
  • Catalyst for preparing high-carbon olefin from synthesis gas as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] By mass fraction, the catalyst of this embodiment includes: 80% Fe, 10% Cu, 5% MgO and 5% Cs 2 O.

[0030] The concrete preparation process of present embodiment catalyst is as follows:

[0031] 1. Take 140ml of 1mol / L ferric nitrate solution and 16ml of 1mol / L copper nitrate solution, stir evenly to obtain a mixed solution.

[0032] 2. Weigh 1.85g of magnesium nitrate and dissolve it in 10ml of deionized water to obtain a magnesium nitrate solution.

[0033] 3. Take the potassium carbonate solution with a concentration of 2mol / L and the solutions of step 1 and step 2, and co-precipitate in an oil bath at 80°C with a stirring speed of 200rpm / min, adjust the titration speed of the three liquids, and keep the pH of the titration mixed solution =9; After the titration, stir and age at 80°C and 400rpm / min for 12h, then place in a high-pressure reactor, crystallize at 150°C for 48h, and filter with suction; weigh 0.5g of polyvinyl alcohol and polyethylene glycol and dissol...

Embodiment 2

[0036] By mass fraction, the catalyst of this embodiment includes: 80% Fe, 18% Cu, 1% MgO and 1% Cs 2 O.

[0037] The concrete preparation process of present embodiment catalyst is as follows:

[0038] 1. Take 140ml of 1mol / L ferric nitrate solution and 28ml of 1mol / L copper nitrate solution, stir evenly to obtain a mixed solution.

[0039] 2. Weigh 0.37g of magnesium nitrate and dissolve it in 10ml of deionized water to obtain a magnesium nitrate solution.

[0040] 3. Take the potassium carbonate solution with a concentration of 2mol / L and the solutions of step 1 and step, and coprecipitate in an oil bath at 80°C with a stirring speed of 200rpm / min, adjust the titration speed of the three liquids, and keep the pH of the titration mixed solution = 9. After the titration is completed, stir and age at 80°C and 400rpm / min for 12h, then place in a high-pressure reactor, crystallize at 150°C for 48h, and filter with suction; weigh 0.5g of polyvinyl alcohol and polyethylene glycol...

Embodiment 3

[0043] By mass fraction, the catalyst of this embodiment includes: 16% Fe, 80% Cu, 2% MgO and 2% Cs 2 o

[0044] The concrete preparation process of present embodiment catalyst is as follows:

[0045] 1. Take 28ml of 1mol / L ferric nitrate solution and 125ml of 1mol / L copper nitrate solution, and stir to obtain a mixed solution.

[0046] 2. Weigh 0.74g of magnesium nitrate and dissolve it in 10ml of deionized water to obtain a magnesium nitrate solution.

[0047] 3. Take the potassium carbonate solution with a concentration of 2mol / L and the solutions of step 1 and step 2, and co-precipitate in an oil bath at 80°C with a stirring speed of 200rpm / min, adjust the titration speed of the three liquids, and keep the pH of the titration mixed solution =9, after the titration is completed, stir and age at 80°C and 400rpm / min for 12h, then place in a high-pressure reactor, crystallize at 150°C for 48h, filter with suction, weigh 0.5g of polyvinyl alcohol and polyethylene glycol and d...

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Abstract

The invention provides a catalyst for preparing high-carbon olefin from synthesis gas, and belongs to the technical field of catalyst preparation. The catalyst comprises 10-80% of an active metal component I, 10-80% of an active metal component II, 1-5% of a structural auxiliary agent and 1-5% of an electronic auxiliary agent, wherein the active metal component I is one or more of Fe, Co, Ni and Cr; the active metal component II is one or more of Cu, Zn and Mn; the structural auxiliary agent is one or more of BeO, MgO, CaO, SrO, BaO, WO3 and MoO3; the electronic auxiliary agent is one or moreof Li2O, Na2O, K2O, Rb2O and Cs2O. The invention also provides a preparation method and application of the catalyst. The catalyst provided by the invention has the advantages of low methane and CO2 selectivity, good CO conversion rate and C5+ olefin selectivity, high stability and low catalyst cost, can realize one-step preparation of high-carbon olefin from synthesis gas, can be used in fixed beds, slurry beds and other processes, and has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a catalyst for producing higher olefins from synthesis gas, a preparation method and application thereof. Background technique [0002] Fischer-Tropsch synthesis is a method to convert natural gas, coal and biomass solid fuels into clean liquid fuels and high value-added chemical products through synthesis gas, but the product distribution is complex and separation and purification are difficult, so the selective preparation of alkenes or alkanes has Important business and academic significance. [0003] Olefins are an important basic chemical. Low carbon (C2 ~ C4) hydrocarbons are mainly used as raw materials for the production of high molecular polymers. Higher olefins (C5 + ) can be used as raw materials for the production of high-value-added products such as high-density polyethylene, high-quality linear low-density polyethylene, PAO lubricants, detergents, and plasticiz...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/889B01J35/10B01J37/03B01J37/02C10G2/00
CPCB01J23/78B01J23/8892B01J23/002B01J37/03B01J37/0236B01J37/0201C10G2/332C10G2/341B01J2523/00B01J35/60B01J2523/15B01J2523/17B01J2523/22B01J2523/842B01J2523/845B01J2523/72B01J2523/24B01J2523/11
Inventor 张明胜马丁苏敏徐尧胡洧冰彭觅乔莎郑珩赵丹颜智李启强汪涛
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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