Method for directly transforming synthesis gas into low-carbon olefin

A technology for low-carbon olefins and synthesis gas, applied in chemical instruments and methods, hydrocarbon production from carbon oxides, organic chemistry, etc., can solve the problems of low low-carbon olefins selectivity, low CO conversion rate, etc. The effect of olefin selectivity, improving selectivity, and good technical effect

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the process of preparing low-carbon olefins by fixed-bed Fischer-Tropsch synthesis in the prior art, the conversion rate of CO is low, and the selectivity of low-carbon olefins in the product is low. A method for directly converting synthesis gas into 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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  • Method for directly transforming synthesis gas into low-carbon olefin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The required amount of shaped coconut shell activated carbon carrier washed by pickling water is subjected to ultrasonic and drying treatment; the required amount of ferric nitrate, manganese nitrate and potassium nitrate are dissolved in water to make mixed solution I; under vacuum conditions, the above The mixed solution I was impregnated on the required amount of processed shaped activated carbon carrier to obtain the Fischer-Tropsch synthesis catalyst precursor J; the impregnated catalyst precursor J was dried at 110°C to obtain the Fischer-Tropsch synthesis catalyst K; the required amount The Fischer-Tropsch synthesis catalyst K and the ZSM-5 molecular sieve catalyst are uniformly mixed to obtain a catalyst for direct conversion of synthesis gas into low-carbon olefins, which is made by weight and consists of:

[0029] 60%(30%Fe 100 mn 60 K 5 o x +70%C)+40%ZSM-5

[0030] The experimental results of the direct conversion of synthesis gas into light olefins with ...

Embodiment 2

[0033] The required amount of shaped coconut shell activated carbon carrier washed by pickling water is subjected to ultrasonic and drying treatment; the required amount of ferric nitrate, manganese nitrate and potassium nitrate are dissolved in water to make mixed solution I; under vacuum conditions, the above The mixed solution I was impregnated on the required amount of processed shaped activated carbon carrier to obtain the Fischer-Tropsch synthesis catalyst precursor J; the impregnated catalyst precursor J was dried at 110°C to obtain the Fischer-Tropsch synthesis catalyst K; the required amount The Fischer-Tropsch synthesis catalyst K and the ZSM-5 molecular sieve catalyst are uniformly mixed to obtain a catalyst for direct conversion of synthesis gas into low-carbon olefins, which is made by weight and consists of:

[0034] 60%(70%Fe 100 mn 40 K 20 o x +30%C)+40%ZSM-5

[0035] The experimental results of the direct conversion of synthesis gas into light olefins with...

Embodiment 3

[0038] The required amount of shaped coconut shell activated carbon carrier washed by pickling water is subjected to ultrasonic and drying treatment; the required amount of ferric nitrate, manganese nitrate and potassium nitrate are dissolved in water to make mixed solution I; under vacuum conditions, the above The mixed solution I was impregnated on the required amount of processed shaped activated carbon carrier to obtain the Fischer-Tropsch synthesis catalyst precursor J; the impregnated catalyst precursor J was dried at 110°C to obtain the Fischer-Tropsch synthesis catalyst K; the required amount The Fischer-Tropsch synthesis catalyst K and the ZSM-5 molecular sieve catalyst are uniformly mixed to obtain a catalyst for direct conversion of synthesis gas into low-carbon olefins, which is made by weight and consists of:

[0039] 30%(20%Fe 100 mn 20 K 30 o x +80%C)+70%ZSM-5

[0040] The experimental results of the direct conversion of synthesis gas into light olefins with...

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Abstract

The invention relates to a method for directly transforming a synthesis gas into low-carbon olefin. The problems of low CO conversion ratio and low selectivity of low-carbon olefin in reaction of producing the low-carbon olefin by fischer-tropsch synthesis of a fixed bed in the prior art are mainly solved. The method adopts the technical scheme as follows: a mixture of a fischer-tropsch synthesis catalyst and a ZSM-5 molecular sieve catalyst is adopted as the catalyst to prepare the low-carbon olefin, wherein the fischer-tropsch synthesis catalyst selects coconut shell activated carbon as a carrier, and the loaded active component contains a composition with the following chemical formula based on atomic ratio: Fe100AbBbOx, wherein A is selected from transition metal Mn, and B is selected from alkali metal K, so that the problem can be well solved, and the method can be applied to industrial production for producing the low-carbon olefin from the synthesis gas.

Description

technical field [0001] The invention relates to a method for directly converting synthesis gas into light olefins. 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 low-carbon olefins must be dive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/04C07C11/02B01J29/48
Inventor 李剑锋陶跃武陈庆龄
Owner CHINA PETROLEUM & CHEM CORP
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