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On December 21, the green process project for preparing dimethyl carbonate/ethylene glycol (DMC/EG) from carbon dioxide catalyzed by immobilized ionic liquids passed the appraisal of scientific and technological achievements organized by the China Petroleum and Chemical Industry Federation in Yangzhou, Jiangsu
.
The appraisal committee composed of academicians of the Chinese Academy of Sciences He Mingyuan, Fei Weiyang, and Han Buxing agreed that this technological achievement is the world’s first, opening up new ways for the utilization of carbon dioxide resources, the energy saving of the existing ethylene glycol process, and the extension of the ethylene oxide industrial chain.
It is recommended to strengthen the promotion of international patent applications and industrial applications
.
The technology achievements done by the Chinese Academy of Sciences Institute of Process Engineering and Chemical Co.
, Ltd.
, Jiangsu Oak cooperation
.
Zhang Suojiang, academician of the Chinese Academy of Sciences and director of the Institute of Process Engineering of the Chinese Academy of Sciences, introduced that this technological achievement has developed a green process for the preparation of dimethyl carbonate/ethylene glycol through the conversion of solid-supported ionic liquids to catalyze the conversion of carbon dioxide, which has achieved atomic economic reactions and mild carbon dioxide conversion.
It overcomes the problems of high energy consumption, low efficiency and difficult sewage treatment in the existing dimethyl carbonate and ethylene glycol processes
.
According to Zhang Suojiang, this technology uses the carbon dioxide waste gas emitted from the oxidation of ethylene to produce ethylene oxide as a raw material.
Under the action of an ionic liquid catalyst, the technology reacts with ethylene oxide to produce ethylene carbonate through carbonylation, which is then combined with ethylene carbonate.
Methanol reacts to produce dimethyl carbonate and ethylene glycol
.
The main innovations of this technology are as follows: First, it invented a solid-supported ionic liquid industrial catalyst and realized mass production, which has the characteristics of high single-pass conversion of ethylene oxide, strong adaptability of raw materials, and no need to separate the catalyst; second, it overcomes carbonylation Reactor gas-liquid uniform distribution and other key technologies, innovatively developed 10,000-ton solid-supported ionic liquid gas-liquid-solid three-phase tubular reactor; third, research and development of alcoholysis reaction-pressure swing azeotropic distillation coupling process enhancement technology , Realized the optimization and integration of the whole system thermal network, greatly reduced energy consumption, significantly improved economy, reduced equipment investment, and formed a complete set of technologies with independent intellectual property rights
.
According to Zhu Jianmin, chairman of Aoke Group, the technology has already been applied in industry.
Jiangsu Aoke Chemical Co.
, Ltd.
has adopted this technology to build an industrial demonstration device with a capacity of 10,000 tons, and achieved a successful start-up of materials
.
The device was designed by Liaoning Petrochemical Planning and Design Institute Co.
, Ltd.
At present, the device has been running smoothly for nearly 5 months, with controllable parameters, and the product quality has reached national and industry standards.
.
In recent years, the market consumption of polyester products in China has increased sharply, and the consumption of ethylene glycol has continued to increase
.
In 2017, the apparent consumption of ethylene glycol in China reached 14.
4 million tons, while the annual output was only 5.
71 million tons, and the degree of foreign dependence was as high as 60%.
Most of the nearly 20 sets of ethylene glycol production equipment in China use ethylene oxide.
The alkane is directly hydrated
.
This process has high water ratio and high energy consumption and is facing elimination
.
The annual production capacity of dimethyl carbonate in China is 730,000 tons, and it is expected to reach 4 million tons by 2020, and it will increase at a rate of 10% per year
.
At present, there are more than 20 domestic carbonate manufacturers, most of which are industrial-grade carbonates, and all adopt propylene oxide transesterification technology.
The equipment is small in scale, heavy in pollution, and poor in efficiency
.
Clean and efficient production technology is urgently needed .
.
The appraisal committee composed of academicians of the Chinese Academy of Sciences He Mingyuan, Fei Weiyang, and Han Buxing agreed that this technological achievement is the world’s first, opening up new ways for the utilization of carbon dioxide resources, the energy saving of the existing ethylene glycol process, and the extension of the ethylene oxide industrial chain.
It is recommended to strengthen the promotion of international patent applications and industrial applications
.
The technology achievements done by the Chinese Academy of Sciences Institute of Process Engineering and Chemical Co.
, Ltd.
, Jiangsu Oak cooperation
.
Zhang Suojiang, academician of the Chinese Academy of Sciences and director of the Institute of Process Engineering of the Chinese Academy of Sciences, introduced that this technological achievement has developed a green process for the preparation of dimethyl carbonate/ethylene glycol through the conversion of solid-supported ionic liquids to catalyze the conversion of carbon dioxide, which has achieved atomic economic reactions and mild carbon dioxide conversion.
It overcomes the problems of high energy consumption, low efficiency and difficult sewage treatment in the existing dimethyl carbonate and ethylene glycol processes
.
According to Zhang Suojiang, this technology uses the carbon dioxide waste gas emitted from the oxidation of ethylene to produce ethylene oxide as a raw material.
Under the action of an ionic liquid catalyst, the technology reacts with ethylene oxide to produce ethylene carbonate through carbonylation, which is then combined with ethylene carbonate.
Methanol reacts to produce dimethyl carbonate and ethylene glycol
.
The main innovations of this technology are as follows: First, it invented a solid-supported ionic liquid industrial catalyst and realized mass production, which has the characteristics of high single-pass conversion of ethylene oxide, strong adaptability of raw materials, and no need to separate the catalyst; second, it overcomes carbonylation Reactor gas-liquid uniform distribution and other key technologies, innovatively developed 10,000-ton solid-supported ionic liquid gas-liquid-solid three-phase tubular reactor; third, research and development of alcoholysis reaction-pressure swing azeotropic distillation coupling process enhancement technology , Realized the optimization and integration of the whole system thermal network, greatly reduced energy consumption, significantly improved economy, reduced equipment investment, and formed a complete set of technologies with independent intellectual property rights
.
According to Zhu Jianmin, chairman of Aoke Group, the technology has already been applied in industry.
Jiangsu Aoke Chemical Co.
, Ltd.
has adopted this technology to build an industrial demonstration device with a capacity of 10,000 tons, and achieved a successful start-up of materials
.
The device was designed by Liaoning Petrochemical Planning and Design Institute Co.
, Ltd.
At present, the device has been running smoothly for nearly 5 months, with controllable parameters, and the product quality has reached national and industry standards.
.
In recent years, the market consumption of polyester products in China has increased sharply, and the consumption of ethylene glycol has continued to increase
.
In 2017, the apparent consumption of ethylene glycol in China reached 14.
4 million tons, while the annual output was only 5.
71 million tons, and the degree of foreign dependence was as high as 60%.
Most of the nearly 20 sets of ethylene glycol production equipment in China use ethylene oxide.
The alkane is directly hydrated
.
This process has high water ratio and high energy consumption and is facing elimination
.
The annual production capacity of dimethyl carbonate in China is 730,000 tons, and it is expected to reach 4 million tons by 2020, and it will increase at a rate of 10% per year
.
At present, there are more than 20 domestic carbonate manufacturers, most of which are industrial-grade carbonates, and all adopt propylene oxide transesterification technology.
The equipment is small in scale, heavy in pollution, and poor in efficiency
.
Clean and efficient production technology is urgently needed .
