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Catalyst for preparing low-carbon olefin through Fischer-Tropsch synthesis and preparation method of catalyst

A low-carbon olefin, Fischer-Tropsch synthesis technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve low-carbon olefin selectivity, CO conversion, etc. It can improve the conversion rate, reduce the acidity, and achieve the effect of large pore size.

Active Publication Date: 2014-01-22
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 process of Fischer-Tropsch synthesis to produce low-carbon olefins in the prior art, the conversion rate of CO is low, and the selectivity of low-carbon olefins in the product is low. A new Fischer-Tropsch synthesis method is provided. A catalyst for producing low-carbon olefins, which has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins

Method used

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  • Catalyst for preparing low-carbon olefin through Fischer-Tropsch synthesis and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix titanium oxide and α-alumina powder evenly, press tablet and sieve into 60-80 mesh to prepare composite carrier H; dissolve the required amount of ferric nitrate, manganese nitrate, magnesium nitrate, and potassium nitrate in water to make a mixed Solution I; under the condition of vacuum degree of 10kPa, impregnate the above mixed solution I on the required amount of the prepared composite carrier H to obtain the catalyst precursor J; the impregnated catalyst precursor J is dried at 110°C, Then it is calcined at a temperature of 550° C. for 2 hours to obtain a catalyst for Fischer-Tropsch synthesis of low-carbon olefins. The weight of the active component and the composite oxide carrier in the catalyst is 20% and 80% respectively, the weight ratio of titanium oxide and α-alumina in the composite oxide carrier, and the general composition formula of the atomic ratio of the active component is as follows:

[0029] 20% Fe 100 mn 50 Mg 5 K 5 o x +80%(10%TiO 2 +90...

Embodiment 2

[0033] Mix titanium oxide and α-alumina powder evenly, press tablet and sieve into 60-80 mesh to prepare composite carrier H; dissolve the required amount of ferric nitrate, manganese nitrate, magnesium nitrate, and potassium nitrate in water to make a mixed Solution I; under the condition of vacuum degree of 10kPa, impregnate the above mixed solution I on the required amount of the prepared composite carrier H to obtain the catalyst precursor J; the impregnated catalyst precursor J is dried at 110°C, Then it is calcined at a temperature of 550° C. for 2 hours to obtain a catalyst for Fischer-Tropsch synthesis of low-carbon olefins. The weights of the active component and the composite oxide carrier in the catalyst are 40% and 60% respectively, the weight ratio of titanium oxide and α-alumina in the composite oxide carrier, and the general composition formula of the atomic ratio of the active component are as follows:

[0034] 40% Fe 100 mn 40 Ca 10 K 10 o x +60%(10%TiO ...

Embodiment 3

[0038] Mix titanium oxide and α-alumina powder evenly, press tablet and sieve into 60-80 mesh to prepare composite carrier H; dissolve the required amount of ferric nitrate, manganese nitrate, magnesium nitrate, and potassium nitrate in water to make a mixed Solution I; under the condition of vacuum degree of 10kPa, impregnate the above mixed solution I on the required amount of the prepared composite carrier H to obtain the catalyst precursor J; the impregnated catalyst precursor J is dried at 110°C, Then it is calcined at a temperature of 550° C. for 2 hours to obtain a catalyst for Fischer-Tropsch synthesis of low-carbon olefins. The weight of the active component and the composite oxide carrier in the catalyst is 50% and 50% respectively, the weight ratio of titanium oxide and α-alumina in the composite oxide carrier, and the general composition formula of the atomic ratio of the active component is as follows:

[0039] 50% Fe 100 mn 20 Mg 15 Cs 15 o x +50% (50%TiO 2...

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Abstract

The invention relates to a catalyst for preparing low-carbon olefin through Fischer-Tropsch synthesis and a preparation method of the catalyst, and mainly aims to solve the problems of low CO conversion rate and low-carbon olefin selectivity in reaction for preparing the low-carbon olefin through Fischer-Tropsch synthesis in the prior art. The invention adopts the following technical schemes: a composite oxide consisting of titanium oxide and alpha-aluminum oxide is adopted as a carrier, and an active component is loaded on the composite oxide carrier and contains a composition with the following chemical formula in an atomic ratio: Fe100AaBbCcOx, wherein A is selected from a transition metal of Mn, B is selected from at least one of alkali metals of Mg and Ca, and C is selected from at least one of K and Cs; the dosage of the composite oxide carrier is 20-80% of the weight of the catalyst; alpha-aluminum oxide contained in the composite oxide carrier accounts for 50-99% of the weight of the composite oxide carrier by weight. The catalyst disclosed by the invention well solves the problems, and can be applied to industrial production of low-carbon olefin prepared through Fischer-Tropsch synthesis.

Description

technical field [0001] The invention relates to a catalyst for Fischer-Tropsch synthesis of low-carbon olefins and a preparation method thereof. Background technique [0002] Low-carbon olefins refer to olefins with carbon atoms less than or equal to 4. Low-carbon olefins represented by ethylene and propylene are very important basic organic chemical raw materials. With the rapid growth of my country's economy, the supply of low-carbon olefins has been in short supply for a long time. At present, the production of low-carbon olefins mainly adopts the petrochemical route of cracking light hydrocarbons (ethane, naphtha, light diesel oil). Due to the increasing shortage of global oil resources and the long-term high price of crude oil, the development of low-carbon olefins industry only relies on oil The tubular cracking furnace process with light hydrocarbons as raw materials will encounter more and more raw material problems, and the production process and raw materials of l...

Claims

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Application Information

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IPC IPC(8): B01J23/889C07C1/04C07C11/02
Inventor 李剑锋宋卫林陶跃武
Owner CHINA PETROLEUM & CHEM CORP
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