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Iron-copper based catalyst for synthesizing low carbon mixed alcohol and production method and use

A low-carbon mixed alcohol and catalyst technology, which is applied in the preparation of organic compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of poor stability, low selectivity of total alcohol, high-grade Solve problems such as poor distribution of alcohol products, achieve good stability, simple preparation method, and good mechanical strength

Inactive Publication Date: 2008-12-24
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this catalyst is its poor stability
[0006] Chinese invention patent CN101185899A discloses a new type of copper-based catalyst for the synthesis of low-carbon mixed alcohols. Generally speaking, there are still some shortcomings such as low selectivity of total alcohols and poor distribution of higher alcohol products, and there is still a certain gap from industrial application.

Method used

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  • Iron-copper based catalyst for synthesizing low carbon mixed alcohol and production method and use

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Effect test

Embodiment 1

[0023] The following metal atoms in the form of nitrates were dissolved in distilled water at a molar ratio of Cu:Fe:Mn:Zn=1.0:1.0:0.5:0.2 to form a mixed solution. Co-precipitate with 30wt% sodium carbonate solution in co-current at 20°C, the precipitation process needs to be fully stirred, and the pH=9-10 should be maintained. The precipitate was washed with distilled water until neutral. After the wet filter cake is dried at 120°C, it is calcined at 350°C for 6 hours in an air atmosphere and crushed to 40-60 mesh. Dissolve 0.014 mol of lithium nitrate in distilled water, impregnate 10.0 g of the above-prepared sample with equal volumes of the aqueous solution of lithium nitrate, dry at 120°C, and roast at 550°C for 2 hours to obtain catalyst 1 # . The weight percent content of each metal is Cu: 39.18%, Fe: 34.44%, Mn: 16.93%, Zn: 8.09%, Li: 1.36%. At T=280℃, P=4.0MPa, GHSV=8000h -1 , H 2 / CO=2.0 reaction conditions, the results obtained are shown in Table 1.

Embodiment 2

[0025] The following metal atoms in the form of nitrates were dissolved in distilled water at a molar ratio of Cu:Fe:Mn:Zn=1.0:1.5:0.5:0.2 to form a mixed solution. Co-precipitate with 20wt% ammonia water at 60°C in parallel flow, the precipitation process needs to be fully stirred, and the pH=9-10 should be maintained. The precipitate was washed with distilled water until neutral. After the wet filter cake is dried at 60°C, it is calcined at 400°C for 6 hours in an air atmosphere and crushed to 40-60 mesh. Dissolve 0.0019 mol of potassium carbonate in distilled water, impregnate 10.0 g of the sample prepared above with equal volume of the potassium carbonate aqueous solution, dry at 60°C, and roast at 650°C for 1 hour to obtain catalyst 2 # . The weight percent content of each metal is Cu: 33.77%, Fe: 43.21%, Mn: 14.20%, Zn: 6.76%, K: 2.06%. At T=240℃, P=2.0MPa, GHSV=10000h -1 , H 2 / CO=0.5 reaction conditions, the results obtained are shown in Table 1.

Embodiment 3

[0027] The following metal atoms in the form of nitrates were dissolved in distilled water at a molar ratio of Cu:Fe:Mn:Zn=1.0:2.0:0.5:0.2 to form a mixed solution. Co-precipitate with 30wt% potassium carbonate in co-current at 60°C, the precipitation process needs to be fully stirred, and the pH=7-8 should be maintained. The precipitate was washed with distilled water until neutral. After the wet filter cake is dried at 120°C, it is calcined at 400°C for 6 hours in an air atmosphere and crushed to 40-60 mesh. Dissolve 0.0024 mol of cesium nitrate in distilled water, impregnate 10.0 g of the sample prepared above with an equal volume of the cesium nitrate aqueous solution, dry at 30°C, and calcinate at 450°C for 3 hours to obtain catalyst 3 #. The weight percentage content of each metal is Cu: 28.18%, Fe: 49.54%, Mn: 12.19%, Zn: 5.64%, Cs: 4.45%. At T=280℃, P=6.0MPa, GHSV=5000h -1 , H 2 / CO=2.0 reaction conditions, the results obtained are shown in Table 1.

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Abstract

The present invention relates to an iron-copper base catalyst synthesizing mixture of lower alcohols. In weight percentage, the iron-copper base catalyst consists of 20 percent to 60 percent of Cu, 15 percent to 60 percent of Fe, 0.4 percent to 20 percent of Mn, 0.4 percent to 30 percent of Zn and 0 percent to 5 percent of MA. The catalyst is prepared by a coprecipitation method. The iron-copper base catalyst has the advantages of simple preparation, easy operation, good reaction performance repeatability of the catalyst, realizing industrial amplification easily, good stability and high total alcohol selectivity.

Description

technical field [0001] The invention belongs to a preparation method and application of a catalyst, in particular to a catalyst for producing low-carbon mixed alcohols from synthesis gas, a preparation method and an application. Background technique [0002] Energy is an important condition to ensure the sustainable development of the national economy. National statistics show that since 1993, my country has changed from a net oil exporter to a net importer. In 2007, my country's oil imports exceeded 200 million tons for the first time, reaching 205.442 million tons. According to the forecast of the International Energy Agency, by 2020, my country's dependence on overseas oil will exceed 76.9%. China will become the world's second largest oil consumer and the world's second largest oil importer after the United States. Therefore, oil supply and demand will be the "bottleneck" that affects my country's economic development, and it is of great significance to actively study ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/80C07C29/156
Inventor 孙予罕房克功林明桂李德宝姜东
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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