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Fluidized bed synthesis gas to olefin iron-based catalyst, preparation method and use thereof

An iron-based catalyst, synthesis gas technology, applied in physical/chemical process catalysts, hydrocarbon production from carbon oxides, chemical instruments and methods, etc. Re-adsorption, reduction of carbon deposits, and promotion of activation effects

Active Publication Date: 2016-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that in the prior art, carbon deposits on the catalyst in the Fischer-Tropsch synthesis affect the performance of the catalyst and the low selectivity of C2-C4 olefins. An iron-based synthesis gas olefins catalyst is provided

Method used

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  • Fluidized bed synthesis gas to olefin iron-based catalyst, preparation method and use thereof
  • Fluidized bed synthesis gas to olefin iron-based catalyst, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve 113.3g of calcium nitrate tetrahydrate in water, add 353.9g of n-butyl titanate to form a slurry, spray the slurry, and bake it at 750°C for 6 hours to obtain the carrier Ti 0.52 Ca 0.48 o 1.52 , Screen the 15-150 μm part for use. Dissolve 187.5g of ferric nitrate hexahydrate, 65g of manganese nitrate and 19g of copper nitrate trihydrate in water to form solution I; dissolve 2.87g of potassium hydroxide in water to form solution II.

[0023] Weigh 80g of prepared Ti 0.5 Ca 0.5 o 1.5 Carrier, using the impregnation method to impregnate solution I on the carrier, bake at 120°C for 6 hours, and then bake at 600°C for 2 hours to obtain a catalyst precursor; impregnate solution II on the catalyst precursor, bake at 100°C for 4 hours, Then calcined at 550°C for 5 hours to obtain the catalyst Fe 30 mn 20 Cu 5 K 2 (Ti 0.52 Ca 0.48 o 1.52 ) 80 , the subscript of the numbers in the brackets is the atomic molar ratio, and the numbers outside the brackets are ...

Embodiment 2~10

[0025] The preparation process is the same as [Example 1], except that the catalyst composition and preparation conditions are changed, and the specific composition and conditions are shown in Table 1.

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Abstract

The invention relates to preparation of an iron-based catalyst t for olefins produced from synthetic gas in a fluidized bed, a preparation method thereof and applications of the catalyst, mainly solving a problem that catalyst carbon deposition in Fischer-Tropsch synthesis has influences on catalyst performances and stability. According to the technical scheme adopted by the catalyst and the preparation method, the catalyst comprises following components by weight: a) 50-100 parts of a carrier having a form of Ti<x>Ca<1-X>O<x+1>, with the x being the molar fraction of Ti and the x being larger than 0.5 and less than 1; b) 5-50 parts of Fe carried on the carrier; c) 1-30 parts of at least one metal or oxide selected from Mn, Zn, Mg, Bi or Cu; and d) 0.1-5 parts of at least one oxide or hydroxide selected from K, Na, Rb or Cs. By the scheme, the problem is solved well and the catalyst can be used in the industrial production of olefins from fluidized bed synthetic gas.

Description

technical field [0001] The invention relates to an iron-based catalyst for producing olefins from fluidized bed synthesis gas, a preparation method and application thereof. Background technique [0002] The method of converting synthesis gas into liquid hydrocarbons through catalyst action was invented by German scientists Frans Fischer and Hans Tropsch in 1923, referred to as F-T synthesis, that is, CO undergoes a heterogeneous catalytic hydrogenation reaction on a metal catalyst to produce straight-chain alkanes and alkenes. Master's mixture process. Germany carried out research and development in the 1920s and realized industrialization in 1936. After World War II, it was closed because it could not compete economically with the oil industry; South Africa has abundant coal resources, but lacks oil resources and has long-term Restricted by international social economic and political sanctions, it was forced to develop coal-to-oil industrial technology, and built the first...

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 宋卫林李剑锋戴毅敏
Owner CHINA PETROLEUM & CHEM CORP
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