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Method for preparing low-carbon olefin by synthetic gas one-step technology

A low-carbon olefin and synthesis gas technology, applied in the direction of hydrocarbon production from carbon oxides, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of low selectivity of low-carbon olefins, low CO conversion rate, etc., to improve Effects of conversion, reduction of surface acidity, and increase in quantity

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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. A method for preparing low-carbon olefins by method, 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 preparing low-carbon olefin by synthetic gas one-step technology
  • Method for preparing low-carbon olefin by synthetic gas one-step technology

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The required amount of acid-washed activated alumina carrier is calcined at 1100° C. for 1 hour for later use. A certain amount of ferric nitrate, manganese nitrate and potassium nitrate are dissolved in water to form a mixed solution I with a certain concentration. Under vacuum conditions, impregnate the above mixed solution I on the required amount of treated 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, and the calcining time was 2 hours, to obtain a catalyst for producing low-carbon olefins by one-step synthesis gas, and its composition was as follows:

[0026] 35% Fe 100 mn 50 K 30 o x +65% Al 2 o 3 .

[0027] Table 1 shows the experimental results of the one-step synthesis gas production of light olefins by the prepared catalyst under certain reaction conditions.

Embodiment 2

[0029] The required amount of acid-washed activated alumina carrier is calcined at 900° C. for 2 hours for later use. A certain amount of ferric nitrate, manganese nitrate and potassium nitrate are dissolved in water to form a mixed solution I with a certain concentration. Under vacuum conditions, impregnate the above mixed solution I on the required amount of treated 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, and the calcining time was 2 hours, to obtain a catalyst for producing low-carbon olefins by one-step synthesis gas, and its composition was as follows:

[0030] 35% Fe 100 mn 50 K 30 o x +65% Al 2 o 3 .

[0031] Table 1 shows the experimental results of the one-step synthesis gas production of light olefins by the prepared catalyst under certain reaction conditions.

Embodiment 3

[0033] The required amount of acid-washed activated alumina carrier is calcined at 1100° C. for 1 hour for later use. A certain amount of ferric nitrate, manganese nitrate and potassium nitrate are dissolved in water to form a mixed solution I with a certain concentration. Under vacuum conditions, impregnate the above mixed solution I on the required amount of treated alumina carrier to obtain the catalyst precursor J. The impregnated catalyst precursor J was dried at 110°C, and then calcined at 400°C for 8 hours to obtain a catalyst for producing low-carbon olefins by one-step synthesis gas.

[0034] 35% Fe 100 mn 50 K 30 o x +65%Al 2 o 3 .

[0035] Table 1 shows the experimental results of the one-step synthesis gas production of light olefins with the prepared catalyst.

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Abstract

The invention relates to a method for preparing a low-carbon olefin by a synthetic gas one-step technology. The method aims at solving a problem that based on the prior art, a low-carbon olefin preparation process adopting a fixed bed Fischer-Tropsch synthesis technology has a low CO conversion rate and poor low-carbon olefin selectivity. The method solves the problem well by adopting a technical scheme of low-carbon olefin preparation adopting a fixed bed catalyst, wherein the technical scheme is characterized in that active alumina is utilized as a carrier; supported active ingredients contain compounds having an atomic ratio chemical formula of Fe100AaBbOx; A represents at least one of Cu and Mn; and B represents an alkali metal K. The method provided by the invention can be utilized for low-carbon olefin industrial production adopting synthetic gas.

Description

technical field [0001] The invention relates to a method for preparing low-carbon olefins from syngas in one step. 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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IPC IPC(8): C07C1/04C07C11/02B01J23/889B01J23/78B01J37/02B01J37/08
Inventor 李剑锋陶跃武陈庆龄
Owner CHINA PETROLEUM & CHEM CORP
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