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Method for carbonyl synthesis by using carbon-rich natural gas

A technology for oxo synthesis and natural gas, applied in the preparation of carbon-based compounds, carbon compound catalysts, hydrogen/synthesis gas production, etc., can solve the problems of increased energy consumption, natural gas loss, environmental greenhouse gas impact, etc. The effect of exhaust emission and loss avoidance

Inactive Publication Date: 2020-09-25
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CO is currently separated from natural gas 2 The process of decarbonization will inevitably increase energy consumption, and will also cause the loss of natural gas. Relevant research shows that in the process of natural gas decarbonization, the loss rate of natural gas is between 2.5% and 7%.
In addition, the removal of CO from natural gas 2 If it is directly discharged into the atmosphere, it will cause serious greenhouse gas impacts on the environment

Method used

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  • Method for carbonyl synthesis by using carbon-rich natural gas
  • Method for carbonyl synthesis by using carbon-rich natural gas

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Experimental program
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Embodiment 1

[0056] This embodiment provides a method for carbonylation using carbon-rich natural gas, the schematic flow chart of which is as follows figure 1 As shown, the steps include the following steps:

[0057] (1) The 1000kmol / h carbon-rich natural gas purified in the natural gas purification unit is preheated in the heat exchange unit, and then reformed in the reformer to obtain synthesis gas (hydrogen-to-carbon ratio=0.95). The pressure of the reforming reaction is 1.5Mpag, and the temperature of the reforming reaction is 900°C;

[0058] Wherein, the pressure of the purified carbon-rich natural gas is 2.0Mpag, the temperature is 40°C, and the CO 2 Molar content 50%;

[0059] (2) After the synthesis gas is purified, carry out a hydroformylation reaction with 1100 kmol / h 1-butene under the catalysis of rhodium dicarbonyl acetylacetonate, the temperature of the carbonylation reaction is 70 ° C, the pressure is 1.0 Mpag, and the product is separated and purified After obtaining 89...

Embodiment 2

[0062] This embodiment provides a method for carbonylation using carbon-rich natural gas, the schematic flow chart of which is as follows figure 2 As shown, the steps include the following steps:

[0063] (1) The 1000 kmol / h carbon-rich natural gas purified in the natural gas purification unit is preheated in the heat exchange unit, and then reformed in the reformer to obtain synthesis gas (hydrogen-to-carbon ratio=1.03). The pressure of the reforming reaction is 2.0Mpag, and the temperature of the reforming reaction is 1100°C;

[0064] Wherein, the pressure of the purified carbon-rich natural gas is 2.5Mpag, the temperature is 40°C, and the CO 2 Molar content 40%;

[0065] (2) After the synthesis gas is purified, carry out a hydroformylation reaction with 1050 kmol / h 1-butene under the catalysis of rhodium dicarbonyl acetylacetonate, the temperature of the carbonylation reaction is 75 ° C, the pressure is 1.1 Mpag, and the product is separated and purified After obtaining...

Embodiment 3

[0068] The present embodiment provides a method for utilizing carbon-rich natural gas to carry out oxo synthesis, which comprises the following steps:

[0069] (1) The 1000kmol / h carbon-rich natural gas purified in the natural gas purification unit is preheated in the heat exchange unit, and then reformed in the reformer to obtain synthesis gas (hydrogen-to-carbon ratio=1.06). The pressure of the reforming reaction is 2.5Mpag, and the temperature of the reforming reaction is 1300°C;

[0070] Wherein, the pressure of the purified carbon-rich natural gas is 3.0Mpag, the temperature is 40°C, and the CO 2 Molar content 25%;

[0071] (2) After the synthesis gas is purified, carry out a hydroformylation reaction with 1000 kmol / h 1-butene under the catalysis of rhodium dicarbonyl acetylacetonate, the temperature of the carbonylation reaction is 80 ° C, the pressure is 1.2 Mpag, and the product is separated and purified After obtaining 760kmol / h C5 aldehyde, the olefin conversion ra...

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Abstract

The invention provides a method for carbonyl synthesis by using carbon-rich natural gas. The method comprises the following steps: (1) preheating purified carbon-rich natural gas, and carrying out a reforming reaction to obtain syngas; and (2) purifying the syngas, carrying out a carbonyl synthesis reaction between the purified syngas and an unsaturated compound, and separating and purifying the product to obtain aldehyde with one more carbon than that of the unsaturated compound serving as a raw material. The method not only solves the problem of resource utilization of the carbon-rich natural gas, but also meets the requirements of carbonyl synthesis on the syngas, improves the energy efficiency and carbon efficiency of the process, gives consideration to high efficiency and emission reduction, and further realizes clean conversion and high-efficiency utilization of carbon-rich natural gas.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of carbon-rich natural gas, and relates to a method for carbonylation of carbon-rich natural gas. Background technique [0002] Oxylation refers to the process of carbon monoxide, hydrogen and olefins in the presence of a catalyst to generate aliphatic aldehydes with one carbon atom more than the original olefins, also known as "formylation (reaction)" or "hydroformylation reaction". Oxylation plays an important role in the chemical industry, and numerous chemicals can be produced through oxo synthesis. The carbon monoxide and hydrogen required for oxo synthesis are collectively referred to as "syngas", and the composition of syngas is H 2 :CO is about 1:1. [0003] Currently, syngas is mostly produced by steam reforming of methane or coal, H 2 :CO is about 3:1, to be used for oxo synthesis, reverse water gas shift of steam reformed gas or excess H 2 seperate. If synthesis g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C47/02C07C45/50C01B3/36C01B3/48C01B3/40
CPCC07C45/505C01B3/36C01B3/48C01B3/40C07C2531/22C01B2203/0227C01B2203/1064C01B2203/1241Y02P20/10
Inventor 吴青鹿晓斌曲顺利杨璐郭雷王江涛贺同强
Owner CHINA NAT OFFSHORE OIL CORP