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Cobalt catalyst, preparation method and application thereof

A technology of cobalt catalysts and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve the problem of hindering the industrialization of Fischer-Tropsch synthesis process problems such as small particles, to achieve good catalyst particle wear performance, high activity and selectivity effect

Active Publication Date: 2008-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of the fine-grained cobalt catalysts described above has been extensively studied for this process, but currently supported fine-grained cobalt catalysts are very easily broken into micron-sized particles during the operation of reactors producing liquid hydrocarbon products
Such particle fragmentation leads to difficulties in separating fine catalyst particles from liquid hydrocarbon products and waxes, thus hindering the industrialization of Fischer-Tropsch synthesis processes

Method used

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  • Cobalt catalyst, preparation method and application thereof
  • Cobalt catalyst, preparation method and application thereof
  • Cobalt catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 1.5kg of cobalt and 1.5kg of aluminum into the graphite crucible, heat it in a high-frequency furnace to above 1300°C and melt it to alloy it, and then spray the alloy liquid from the nozzle of the crucible to a speed of 1000 rpm On the copper roller, the cooling water is passed through the copper roller, and the alloy liquid is 10 6 After rapid cooling at the cooling rate of ℃ / s, it is thrown out along the tangent line of the copper roll to form scale-like strips. The scale-like strips are ground to a particle diameter of less than 70 microns to obtain a master alloy. Slowly add 50 g of the master alloy into a three-neck flask filled with 500 g of 20% aqueous sodium hydroxide solution, control its temperature to 80° C. and keep stirring at constant temperature for 1 hour. After stopping heating and stirring, decant the liquid and wash with distilled water at 100°C until the pH value is 7. The prepared catalyst is numbered Catalyst-1.

[0042] The composition of C...

Embodiment 2

[0046] Add 1.0kg of cobalt and 2.0kg of aluminum into the graphite crucible, heat it in a high-frequency furnace to above 1300°C and melt it to alloy it, and then the alloy liquid is sprayed from the nozzle of the crucible to a speed of 900 rpm On the copper roller, the cooling water is passed through the copper roller, and the alloy liquid is 10 5 After rapid cooling at the cooling rate of ℃ / s, it is thrown out along the tangent line of the copper roll to form scale-like strips. The scale-like strips are ground to a particle diameter of less than 70 microns to obtain a master alloy. Slowly add 50 g of the master alloy into a three-neck flask filled with 500 g of 20% aqueous sodium hydroxide solution, control its temperature to 80° C. and keep stirring at constant temperature for 1 hour. After stopping heating and stirring, decant the liquid and wash with distilled water at 80°C until the pH value is 7. The prepared catalyst is numbered Catalyst-2.

[0047] The composition o...

Embodiment 3

[0051] Add 480g of cobalt, 480g of aluminum, and 20g of copper into the graphite crucible, heat it in a high-frequency furnace to above 1600°C to melt, and make it alloyed, and then the alloy liquid is sprayed from the nozzle of the crucible to a speed of 670 rpm On the divided copper roll, cooling water is passed through the copper roll, and the alloy liquid is 10 4 The cooling rate of ℃ / s is rapidly cooled and thrown out along the tangent line of the copper roller to form scaly strips, which are ground to a particle diameter of less than 70 microns. Slowly add 50 g of the master alloy into a three-neck flask filled with 500 g of 20% aqueous sodium hydroxide solution, control its temperature to 70° C. and keep stirring at constant temperature for 1 hour. After stopping heating and stirring, decant the liquid and wash with distilled water at 80°C until the pH value is 7. The prepared catalyst is numbered Catalyst-3.

[0052] The composition of Catalyst-3 is shown in Table 1....

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Abstract

The present invention relates to a cobalt catalyst. It is characterized by that said catalyst is formed from 30-95wt% of cobalt, 0.5-30wt% of aluminium and 0-40wt% of at least one transition metal M selected from subgroups of IB, IIB, IIIB, IVB, VIB, VIIB and VIIIB of periodic table of chemical elements. The cobalt is existed by mainly adopting metal state form of amorphous or nano crystal grains. When said catalyst is used for making Fischer-Tropsch synthesis reaction, as compared with skeleton cobalt it passes higher acitivity and selectivity.

Description

technical field [0001] The invention relates to a cobalt catalyst, a preparation method and its application, in particular to a quenched cobalt catalyst, its preparation method and its application in the process of preparing hydrocarbons by Fischer-Tropsch synthesis reaction with synthesis gas as raw material. Background technique [0002] With the transformation of the world's energy structure from a single petroleum energy structure to a joint supply of coal, natural gas and petroleum, and the increasing global environmental protection requirements, the Fischer-Tropsch synthesis reaction process using natural gas and coal-based synthesis gas as raw materials has the advantages of not relying on petroleum, The advantages of clean products (free of sulfur, nitrogen, and aromatic hydrocarbons) have attracted the attention of countries all over the world in recent years. [0003] The Fischer-Tropsch synthesis process based on cobalt-based catalysts is particularly attractive b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835B01J23/889C07C1/04
Inventor 张晓昕孟祥堃宗保宁慕旭宏王宣
Owner CHINA PETROLEUM & CHEM CORP
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