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Method and system for producing low carbon olefins from aqueous feedstock

A low-carbon olefin and raw material technology, applied in the field of low-carbon olefin and system from water-containing raw materials, can solve the problem of low olefin yield and achieve high conversion rate and good technical effect

Pending Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the technical problem of low olefin yield in the prior art when water-containing raw materials are converted to olefins, and a method for producing low-carbon olefins from water-containing raw materials is provided

Method used

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  • Method and system for producing low carbon olefins from aqueous feedstock
  • Method and system for producing low carbon olefins from aqueous feedstock
  • Method and system for producing low carbon olefins from aqueous feedstock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The water-containing raw material (4) enters the system of the present invention and contacts with the catalyst to generate a reaction product (7) rich in carbon number less than or equal to 6 olefins, wherein the mass percentage of water in the water-containing raw material (4) is 20%; the water-containing The total mass percentage of oxygen-containing compounds in the raw material (4) is 80%, wherein the oxygen-containing compounds are acetone, methyl ethyl ketone, pentanone, methyl isoamyl ketone, methanol, ethanol, acetaldehyde, propionaldehyde; oxygen-containing compounds The mass percent content of ketone compounds in the middle is 30%; the mass percent content of aldehyde compounds in the oxygen-containing compounds is 20%.

[0058] The system comprises a first reactor (1), a second reactor (2) and a gas-liquid separator (3).

[0059] The water-containing raw material (4) is preheated to 120-200°C and then enters the first reactor (1) to contact with the first ca...

Embodiment 2

[0067] The water-containing raw material (4) enters the system of the present invention and contacts with the catalyst to generate a reaction product (7) rich in carbon number less than or equal to 6 olefins, wherein the mass percentage of water in the water-containing raw material (4) is 90%; The total mass percentage of oxygen-containing compounds in the raw material (4) is 10%, wherein the oxygen-containing compounds are acetone, butanone, pentanone, methyl isoamyl ketone; the mass percentage of ketones in the oxygen-containing compounds is 100%; Oxygenate free of aldehydes.

[0068] The system of the present invention comprises a first reactor (1), a second reactor (2) and a gas-liquid separator (3).

[0069] The water-containing raw material (4) is preheated to 120-200°C and then enters the first reactor (1) to contact with the first catalyst to obtain the first reaction product (5); the stream I (8) is preheated to 150-350°C and then enters The second reactor (2) and th...

Embodiment 3

[0077] The water-containing raw material (4) enters the system of the present invention and contacts with the catalyst to generate a reaction product (7) rich in carbon number less than or equal to 6 olefins, wherein the mass percentage of water in the water-containing raw material (4) is 70%; The total mass percentage of oxygen-containing compounds in the raw material (4) is 30%, wherein the oxygen-containing compounds are one of acetone, butanone, pentanone, methyl isoamyl ketone, methanol, ethanol, acetaldehyde, and propionaldehyde or more; the mass percent content of ketone compounds in the oxygen-containing compound is 95%; the mass percent content of the aldehyde compound in the oxygen-containing compound is 5%.

[0078] The system of the present invention comprises a first reactor (1), a second reactor (2) and a gas-liquid separator (3).

[0079] The water-containing raw material (4) is preheated to 120-200°C and then enters the first reactor (1) to contact with the fir...

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Abstract

The invention relates to a method for preparing low-carbon olefin from a water-containing raw material, which comprises the following steps: making a water-containing raw material contact with a catalyst, and conducting reacting to obtain a low-carbon olefin-containing product, wherein the water-containing raw material comprises oxygen-containing compounds and water, the mass content of the oxygen-containing compounds is 10-80% and the mass content of the water is 20-90% by taking the mass of the water-containing raw material as 100%, the oxygen-containing compounds comprise alcohols, aldehydes and ketones compounds, in terms of 100% of the mass of the oxygen-containing compounds, the mass content of the ketone compounds is 30-100%, and the mass content of the aldehyde compounds is 0-20%, and the catalyst comprises a carrier and an active component. By adopting the technical scheme provided by the invention, the conversion rate of the oxygen-containing compound can be up to 95.4 wt%, the selectivity of ethylene, propylene and C4 hydrocarbons in the product can be up to 90.1 wt%, and a better technical effect is achieved.

Description

technical field [0001] The present invention relates to a method and system for producing low-carbon olefins from water-containing raw materials, and the application of the system in producing low-carbon olefins from water-containing raw materials. Background technique [0002] Low-carbon olefins, namely ethylene and propylene, are two important basic chemical raw materials, and their demand is increasing. Generally, ethylene and propylene are produced through petroleum routes, but due to the limited supply and high price of petroleum resources, the cost of producing ethylene and propylene from petroleum resources continues to increase. In recent years, people have begun to vigorously develop the technology of converting alternative raw materials into ethylene and propylene. Among them, an important class of alternative raw materials for the production of low-carbon olefins is oxygenated compounds, such as alcohols (methanol, ethanol), ethers (dimethyl ether, methyl ethyl e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C1/207C07C11/04C07C11/06C07C11/08
CPCC07C1/20C07C1/207C07C2529/40C07C2529/80C07C2529/78C07C11/04C07C11/06C07C11/08Y02P30/20Y02P30/40
Inventor 李晓红王洪涛俞志楠郑毅骏
Owner CHINA PETROLEUM & CHEM CORP