Nanoreactors for the green synthesis of ethylene glycol

The research team led by Academician Li Can and Researcher Yang Qihua of the State Key Laboratory of Catalysis of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, has recently achieved a highly efficient, green, and energy-efficient ethylene oxide-catalyzed hydration of ethylene glycol (MEG) in a nanoreactor. process.

The traditional glycol production process uses ethylene oxide (EO) direct hydration process. In order to obtain high glycol selectivity, a large excess of water is needed in the reaction system (usually the molar ratio of H2O/EO can be as high as 20), and the concentration of ethylene glycol in the reaction liquid is less than 10%. Therefore, the distillation and purification of products is a high-energy process. In order to reduce energy consumption, people use acid-base catalyzed hydration process. However, the traditional acid-base catalyzed process still needs high selectivity of ethylene glycol under the condition that the ratio of H2O/EO is much higher than the stoichiometric ratio.

The research team focused on the study of the heterogeneous catalysts that encapsulated molecular catalysts in nanoreactors and found that in the ethylene oxide-catalyzed hydration reaction, nanoreactors can be used at 40°C and near the ratio of metered water to obtain 98 % conversion of ethylene oxide and 98% selectivity to ethylene glycol, the concentration of ethylene glycol in the reaction system reached more than 75%, significantly reducing the energy consumption in the production of ethylene glycol. At the same time, the heterogeneous catalyst avoids the environmental pollution problems of the traditional liquid and solid acid catalysis process, and can realize the separation and recycling of the catalyst. It is a typical green catalytic process.

Electrical Heater

Technical information
Heating Material: Carbon crystal
Power: 250W/350W/550W/750W/950W
Voltage: 115V- 220V
Certification: ETL, CE, ROHS, ISO9001, SAA
Frame material: Aluminum frame
Using life: 100, 000 hours
Infrared radiant wavelength: 8~14um
Electric heat radiation conversion rate: >99%F
Surface temperature: 70 - 80 celsius
Installation type: Wall or ceiling mounted
Color: White and colorful (with attractive picture)
Function: Adjustable Thermostat, Overheat Protection

Electric Heater,Electric Winter Air Heater,Electric Water Heater,Electric Infrared Panel Heater

Shandong Dexiang Electrical Technology Co.,Ltd , https://www.infraredroomheater.com