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Catalyst for preparing olefins from synthesis gas and preparation method thereof

A catalyst, a technology for producing olefins, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. chance of secondary reaction, effect of avoiding selective influence

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the problem of low selectivity of low-carbon olefins in Fischer-Tropsch synthesis in the prior art, and a catalyst for producing olefins from synthesis gas is provided. Advanced advantages

Method used

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  • Catalyst for preparing olefins from synthesis gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]Dissolve 23.44g of ferric nitrate hexahydrate, 0.36g of potassium hydroxide, 16.27g of manganese nitrate solution with a mass concentration of 50% and 2.37g of copper nitrate trihydrate in water to form a solution. Add 25g of silica sol with a concentration of 40% to prepare a slurry.

[0024] Take by weighing 80g silica core (specific surface area is 5m 2 / g), the above slurry was sprayed onto the silica inner core, baked at 120°C for 6 hours, and then fired at 600°C for 2 hours to obtain the catalyst 20Fe 30 mn 20 Cu 5 K 2 (SiO 2 ) 80 -80 (SiO 2 ), the numbers outside the brackets are parts by weight.

Embodiment 2

[0026] Dissolve 11.27g of ferric nitrate hexahydrate, 0.03g of sodium hydroxide, 1.14g of magnesium nitrate hexahydrate and 1.14g of zinc nitrate hexahydrate in water to form a solution. Add 16.17g concentration of 40% silica sol to prepare slurry.

[0027] Take by weighing 90g alumina inner core (the specific surface area is 6m 2 / g), the above slurry was sprayed onto the alumina inner core, baked at 110°C for 8 hours, and then fired at 700°C for 8 hours to obtain the catalyst 10Fe 25 Mg 1.5 Zn 3.5 Na 0.2 (SiO 2 ) 90 -90 (Al 2 o 3 ) Numbers outside brackets are parts by weight.

Embodiment 3

[0029] Dissolve 4.63g of ferric nitrate hexahydrate, 0.003g of potassium hydroxide, 3.01g of manganese nitrate solution with a mass concentration of 50% and 1.11g of cobalt nitrate hexahydrate in water to form a solution. Add 3.39g of aluminum sol with a concentration of 30% to prepare a slurry.

[0030] Take by weighing 97g alumina core (specific surface area is 10m 2 / g), the above slurry was sprayed onto the alumina inner core, baked at 80°C for 12 hours, and then fired at 400°C for 6 hours to obtain the catalyst 3Co 10 Fe 40 mn 25 K 0.1 (Al 2 o 3 ) 55 -97 (Al 2 o 3 ), the numbers outside the brackets are parts by weight.

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Abstract

The invention relates to an iron-based catalyst for preparing olefin by using synthetic gas, and a preparation method thereof. A problem of low carbon olefin selectivity in Fischer-Tropsch synthesis is mainly solved. The catalyst comprises 80-98 parts by weight of a core selected from SiO2 and Al2O3 and 2-20 parts by weight of a shell, wherein the specific surface area of the core is less than 30m<2> / g, and the shell comprises 50-100 parts of a carrier selected from SiO2 and Al2O3, 5-50 parts by weight of at least one metal of Fe and Co or oxide thereof loaded on the carrier, 1-30 parts by weight of at least one metal of Mn, Zn, Mg and Cu or oxide thereof, and 0.1-5 parts by weight of at least one metal of K, Na, Rb and Cs or oxide thereof. The catalyst well solves the problem, and can be used in the industrial production of the preparation of olefin by using the synthetic gas.

Description

technical field [0001] The invention relates to a catalyst for preparing olefins from synthesis gas and a preparation method thereof. Background technique [0002] Low-carbon olefins (olefins with carbon atoms ≤ 4) represented by ethylene and propylene are the basic raw materials of the chemical industry. At present, the main raw materials of low-carbon olefins in the world are petroleum hydrocarbons, of which naphtha accounts for the majority, and there are Alkanes, hydrogenated diesel oil, some heavy oil, etc. At home and abroad, natural gas or light petroleum fractions are mostly used as raw materials, and low-carbon olefins are produced by steam cracking in ethylene complexes. Steam cracking is a large energy-consuming device in petrochemical industry, and it completely depends on non-renewable petroleum resources. With the increasing shortage of oil resources, it is urgent to find alternative resources. Therefore, the research work of producing olefins from natural g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J23/80B01J23/78C07C11/02C07C1/04
Inventor 宋卫林陶跃武庞颖聪李剑锋
Owner CHINA PETROLEUM & CHEM CORP
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