Method for producing lower olefins from synthesis gas

A low-carbon olefin and synthesis gas technology, applied in the direction of hydrocarbon production from carbon oxides, chemical instruments and methods, hydrocarbons, etc., can solve the problem of unusable catalysts and other issues

Active Publication Date: 2020-04-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this disclosure is to provide a method for producing light olefins from synthesis gas, so as to overcome the defect that the catalyst cannot be used at a higher space velocity in the existing method

Method used

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  • Method for producing lower olefins from synthesis gas
  • Method for producing lower olefins from synthesis gas
  • Method for producing lower olefins from synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0064]Dissolve 3.17g potassium permanganate in 40.55g deionized water, heat and stir to dissolve it to form potassium permanganate solution, add 1.16g ferric nitrate to 3.64g of 50% by weight manganese nitrate solution and stir evenly to obtain ferric nitrate containing manganese nitrate solution, the weight ratio of potassium permanganate to manganese nitrate is 1.7:1, and the molar ratio of Fe:Mn is 1:10. The above two solutions are mixed and transferred to a hydrothermal reaction kettle, and placed in 180°C water Thermal reaction 24h. The resulting brown precipitate was washed with deionized water several times until the pH of the washing solution was 7, and then the solid product was dried at 120°C overnight and calcined at 400°C for 4 hours to obtain the catalyst A1 prepared in this example. The composition of Catalyst A1 is 8% by weight of Fe-OMS-2 based on the dry basis weight of .

preparation Embodiment 2

[0066] Dissolve 3.17g potassium permanganate in 40.55g deionized water, heat and stir to dissolve it to form potassium permanganate solution, add 0.58g ferric nitrate to 3.64g of 50% by weight manganese sulfate solution and stir evenly to obtain ferric nitrate containing The manganese sulfate solution, the weight ratio of potassium permanganate and manganese sulfate is 1.7:1, the molar ratio of Fe:Mn is 1:20, the above two solutions are mixed, and transferred to a hydrothermal reaction kettle, in 180 ℃ water Thermal reaction 24h. The resulting brown precipitate was washed several times with deionized water until the pH of the washing solution was 7, and then the solid product was dried at 120°C overnight and calcined at 400°C for 4 hours to obtain the catalyst A2 prepared in this example. The composition of Catalyst A2 was 4% by weight Fe-OMS-2 based on the dry weight of .

preparation Embodiment 3

[0068] Dissolve 3.17g potassium permanganate in 40.55g deionized water, heat and stir to dissolve it to form potassium permanganate solution, add 0.25g ferric nitrate to 3.64g of 50% by weight manganese nitrate solution and stir evenly to obtain ferric nitrate containing manganese nitrate solution, the weight ratio of potassium permanganate to manganese nitrate is 1.7:1, and the molar ratio of Fe:Mn is 1:25. The above two solutions are mixed and transferred to a hydrothermal reaction kettle, and heated in 180°C water Thermal reaction 24h. The resulting brown precipitate was washed with deionized water several times until the pH of the washing solution was 7, and then the solid product was dried at 120°C overnight and calcined at 400°C for 4h to obtain the catalyst A3 prepared in this example. The composition of Catalyst A3 was 3.2% by weight of Fe-OMS-2 based on the dry basis weight of .

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Abstract

The invention relates to a method for preparing lower olefins from synthesis gas, which comprises the following steps: (1) carrying out reduction treatment on an initial catalyst in a hydrogen-containing reducing atmosphere to obtain a reduced catalyst; (2) carrying out activation treatment on the reduced catalyst obtained in the step (1) in an activation atmosphere containing gaseous hydrocarbonsand optional inert gases to obtain an activated catalyst; (3) enabling synthesis gas to be in contact with the activated catalyst obtained in the step (2) for reaction; wherein the initial catalyst comprises a carrier and an active component, the carrier is a manganese oxide molecular sieve OMS-2, and the active component is one or more of group VIII metals. The method disclosed by the inventioncan still have relatively high raw material conversion rate and target product selectivity at a high space velocity.

Description

technical field [0001] The present disclosure relates to a method for producing light olefins from synthesis gas. Background technique [0002] Olefin is an important basic chemical raw material in the production of chemical industry, and it is also a symbol to measure the development level of a country's petrochemical industry. From 1995 to 2010, the world's ethylene demand grew at an average annual rate of 4.1%. It is estimated that by 2015, my country's ethylene production capacity will be 27.5 million tons, and the domestic guarantee capacity will be 64%. At the same time, the world's propylene demand is also growing rapidly. By 2010, the average annual growth rate will reach 6.3%. It is estimated that by 2015, my country's propylene production capacity will be 24 million tons, and the domestic guarantee capacity will be 77%. The relationship between supply and demand of olefins in my country is tense. [0003] At present, the methods for preparing low-carbon olefins can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03C07C1/04C07C11/04C07C11/06C07C11/08
CPCB01J29/03C07C1/044B01J2229/18C07C2529/03C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 晋超吴玉王薇张荣俊侯朝鹏孙霞夏国富
Owner CHINA PETROLEUM & CHEM CORP
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