China's first carbonate methamphetylate / glycol green process

 On December 21st, the solid-carrying ionic liquid catalytic carbon dioxide conversion preparation of dmO/EG green process project in Yangzhou, Jiangsu Province, passed the Scientific and Technological Achievement Identification organized by the China Petroleum and Chemical Industry Federation. The appraisal committee composed of He Mingyuan, Fei Weiyang and Han Buxing, members of the Chinese Academy of Sciences, agreed that the technological achievements were the first of their kind in the world, opening up new ways for the resource utilization of carbon dioxide, energy saving of existing ethylene glycol processes and the extension of the ethylene oxide industry chain, and suggested strengthening international patent applications and industrialization.
results were completed by the Institute of Process Engineering of the Chinese Academy of Sciences and Jiangsu Oak Chemical Co.,
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. Zhang Lockjiang, a member of the Chinese Academy of Sciences and director of the Institute of Process Engineering of the Chinese Academy of Sciences, said that the technical achievements have developed a solid-carrying ionic liquid catalytic carbon dioxide conversion preparation carbonate/glycol green process, achieved atomic economic reaction and carbon dioxide temperature conversion, and overcome the existing carbonate and glycol process energy consumption, low efficiency, sewage difficult to deal with the problem.
According to Zhang, the technology uses carbon dioxide emissions from ethylene oxide ethylene oxide as raw material, and ethylene oxide under the action of an ionic liquid catalyst, through a carbide-based reaction to produce ethylene carbonate, and then ethylene carbonate and methanol reaction to produce bicarbonate and ethylene glycol. The main innovations of this technology are as follows: First, the invention of solid-carrying ionic liquid industrial catalyst and mass production, with high one-way conversion rate of ethylene oxide, strong adaptability of raw materials, catalyst no separation, etc. ; Solid-carrying ionic liquid gas liquid solid three-phase column tube reactor, third, research and development of alcohol solution reaction - variable pressure co-boiling distillation coupling process strengthening technology, to achieve system-wide thermal network optimization and integration, greatly reduce energy consumption, significantly improve economics, reduce equipment investment, formed a complete set of technology with independent intellectual property rights.
According to Zhu Jianmin, chairman of Oak Group, the technology has been used in industry, Jiangsu Oak Chemical Co., Ltd. used the technology to build a 10,000-ton industrial demonstration device, and achieve a successful feeding drive. The device was designed by Liaoning Petrochemical Planning and Design Institute Co., Ltd., the device has been running smoothly for nearly 5 months, the parameters are controllable, product quality meets national and industry standards.
recent
, China's polyester products market consumption has increased rapidly, ethylene glycol consumption continues to increase. In 2017, The overt consumption of glycol in China reached 14.4 million tons, while the annual output was only 5.71 million tons, and the external dependence was as high as 60%. China's existing nearly 20 sets of ethylene glycol production equipment, most of the use of ethylene oxide direct water legal. The process water ratio is high, energy consumption is high, facing elimination.
china's annual production capacity of 730,000 tons of methamphetate, is expected to reach 4 million tons by 2020, and at a rate of 10% per year growth. At present, there are more than 20 domestic carbonate manufacturers, production capacity of industrial-grade carbonate-based, are using epoxy propane exchange process, the device is small in scale, heavy pollution, poor efficiency, it is urgent to develop clean and efficient production technology.