Method for directly preparing light alkene by using synthetic gas as raw material

A low-carbon olefin and synthesis gas technology, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry, can solve the problems of low conversion rate of CO and low selectivity of low-carbon olefins, so as to improve the degree of reduction and the selection of low-carbon olefins properties, and weaken the effect of the secondary reaction of olefins

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the fixed bed Fischer-Tropsch synthesis process of 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. Method for preparing low-carbon olefins by law

Method used

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  • Method for directly preparing light alkene by using synthetic gas as raw material
  • Method for directly preparing light alkene by using synthetic gas as raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The required amount of acid-washed alumina carrier is calcined at 1100° C. for 1 hour for later use. Dissolve the required amount of ferric nitrate, manganese nitrate, magnesium nitrate and potassium nitrate in water to form the mixed solution I with the required proportion concentration. Under vacuum conditions, impregnate the above mixed solution I on the required amount of treated α-alumina carrier to obtain the catalyst precursor J. The impregnated catalyst precursor J was dried at 110°C, and then calcined at a temperature of 600°C for 2 hours to obtain a catalyst for the direct production of low-carbon olefins from synthesis gas. The weight composition of the catalyst was: :

[0029] 20% Fe 100 mn 10 Mg 2.0 K 15 o x +80%Al 2 o 3

[0030] Table 1 shows the experimental results of the direct production of light olefins from syngas as raw material with the prepared catalyst under certain reaction conditions.

[0031]

Embodiment 2

[0033] The required amount of acid-washed alumina carrier is calcined at 900° C. for 1 hour for later use. Dissolve the required amount of ferric nitrate, manganese nitrate, magnesium nitrate and potassium nitrate in water to form the mixed solution I with the required proportion concentration. Under vacuum conditions, impregnate the above mixed solution I on the required amount of treated α-alumina carrier to obtain the catalyst precursor J. The impregnated catalyst precursor J was dried at 110°C, and then calcined at a temperature of 600°C for 2 hours to obtain a catalyst for the direct production of low-carbon olefins from synthesis gas. The weight composition of the catalyst was: :

[0034] 20% Fe 100 mn 50 Sr 40 K 5 o x +80%Al 2 o 3

[0035] Table 1 shows the experimental results of the direct production of light olefins from syngas as raw material with the prepared catalyst under certain reaction conditions.

[0036]

Embodiment 3

[0038] The required amount of acid-washed alumina carrier is calcined at 1200° C. for 1 hour for later use. Dissolve the required amount of ferric nitrate, manganese nitrate, magnesium nitrate and potassium nitrate in water to form the mixed solution I with the required proportion concentration. Under vacuum conditions, impregnate the above mixed solution I on the required amount of treated α-alumina carrier to obtain the catalyst precursor J. The impregnated catalyst precursor J was dried at 110°C, and then calcined at a temperature of 600°C for 2 hours to obtain a catalyst for the direct production of low-carbon olefins from synthesis gas. The weight composition of the catalyst was: :

[0039] 35% Fe 100 Cu 50 Mg 20 Cs 0.5 o x +65%Al 2 o 3

[0040] Table 1 shows the experimental results of the direct production of light olefins from syngas as raw material with the prepared catalyst under certain reaction conditions.

[0041]

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Abstract

The invention relates to a method for directly preparing light alkene by using a synthetic gas as a raw material and mainly solves the problems that CO conversion rate is low and light alkene selectivity is relatively low during a reaction where a fixing bed is adopted to prepare the light alkene through Fischer-Tropsch synthesis. The method takes Alpha-alumina as a carrier carrying active constituent which contains the following composition chemical formula in atom ratio: Fe100AaBbCcOx, where A is selected from one or more of Mn or Cu, B is selected from one or more of Mg or Sr, and C is selected from one or more of K or Cs. Due to the adoption of the technical scheme, the problems are well solved. Therefore, the method is suitable for industrial production for preparing the low carbon alkene by using the synthetic gas.

Description

technical field [0001] The invention relates to a method for directly producing low-carbon olefins by using synthesis gas as a raw material. 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-c...

Claims

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Application Information

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IPC IPC(8): C10G2/00
Inventor 李剑锋宋卫林陈庆龄
Owner CHINA PETROLEUM & CHEM CORP
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