Catalyst for preparing low-carbon mixed alcohol by using synthesis gas and preparation method thereof

A low-carbon mixed alcohol and catalyst technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of complex product components and unfavorable separation, and achieve the improvement of specific surface area, prevention of sintering, and reaction conditions. mild effect

Active Publication Date: 2011-04-27
SHANGHAI HUAYI ENERGY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Catalysts provided in these two patents, C in the product 2+ The selectivity of alcohol is high, but the selectivity of olefin is also very high, more than 20%, the product composition is relatively complex, which is not conducive to separation

Method used

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  • Catalyst for preparing low-carbon mixed alcohol by using synthesis gas and preparation method thereof
  • Catalyst for preparing low-carbon mixed alcohol by using synthesis gas and preparation method thereof
  • Catalyst for preparing low-carbon mixed alcohol by using synthesis gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Press ZrO 2 : 69.7wt%, MnO 2 : 15.3wt%, K 2 O: 0.5wt%, Pd: 1wt%, CuO: 4.6wt%, C: 8.9wt%, the nitrates of Zr, Mn, and Cu elements are dissolved in deionized water, and co-precipitated with KOH solution at room temperature, Fully stir during the precipitation process and keep the pH = 13, wash the precipitate with deionized water until neutral, add starch and deionized water to the precipitate and stir evenly, heat and stir to make it into a paste, and dry at 90°C 20 hours, calcined at 500°C for 6 hours in a nitrogen atmosphere, crushed into 20-40 meshes, impregnated with K in an equal volume, dried at 90°C for 20 hours, calcined in a nitrogen atmosphere at 500°C for 6 hours, and then impregnated with an equal volume of Pd ( Pd(NO 3 ) 2 as a precursor), dried at 90°C for 20 hours, and calcined at 330°C for 6 hours in a nitrogen atmosphere to obtain the desired catalyst. CO+H 2 The reaction was carried out in a stainless steel tube reactor with an inner diameter of 1...

Embodiment 2

[0033] The catalyst composition is ZrO 2 : 73wt%, MnO 2 : 16wt%, K 2 O: 0.5wt%, Pd: 1wt%, CuO: 4.8wt%, C: 4.7wt%, the use conditions are P=6.0MPa, T=340℃, GHSV=7200h -1 , H 2 / CO=1, all the other conditions are with embodiment 1, and the obtained results are as shown in table 2:

[0034] Table 2 Analysis results of gas chromatography

[0035]

Embodiment 3

[0037] The catalyst composition is ZrO 2 : 63.9wt%, MnO2 : 14.0wt%, K 2 O: 0.5wt%, Pd: 1wt%, CuO: 4.2wt%, C: 16.4wt%, the use conditions are P=6.0MPa, T=340℃, GHSV=7200h -1 , H 2 / CO=1, all the other conditions are with embodiment 1, and the obtained results are as shown in table 3:

[0038] Table 3 Analysis results of gas chromatography

[0039]

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Abstract

The invention discloses a catalyst for preparing low-carbon mixed alcohol by using synthesis gas, which comprises the following components in percentage by weight: 54 to 75 percent of ZrO, 10 to 20 percent of MnO2, 0.4 to 1.0 percent of RxO, 3 to 5 percent of CuO, 4 to 20 percent of C and 0.5 to 1.5 percent of noble metal. The catalyst is prepared by adopting a co-precipitation method, wherein the precursors of the Zr, Mn and Cu elements are nitrates, and the precursor of the C is starch. The catalyst has mild reaction conditions, the selectivity of C2+ alcohol can be more than 36 weight percent, the selectivity of isobutyl alcohol can be more than 25 weight percent, and the selectivity of hydrocarbon (mainly comprising methane) can be less than 4 weight percent. By adding the starch in the preparation of the catalyst and forming amorphous porous carbon in the drying and roasting processes, the specific surface area of the catalyst can be improved, the dispersion of metal oxides is effectively improved, sintering is prevented, and the stability of the catalyst is remarkably improved.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for preparing low-carbon mixed alcohols from synthesis gas and a preparation method thereof. Background technique [0002] In today's world, energy strategies are very important issues. With the depletion of oil resources, energy consumption is dominated by coal and natural gas. Coal is the main energy source in our country. From the perspective of effective utilization of resources and environmental protection, research on indirect conversion of coal into liquid fuels and chemicals has broad application prospects. [0003] The low-carbon mixed alcohol synthesized by carbon monoxide hydrogenation is an ideal additive to increase the octane number of unleaded gasoline. It does not contain aromatic substances or sulfur. It has a high octane number and has important environmental protection potential and economic value. Therefore, the catalytic synthesis of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J21/18C07C29/157
Inventor 孙卫中金生亚梁必超
Owner SHANGHAI HUAYI ENERGY CHEM
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