Technology for continuous co-production of ethylene carbonate, ethylene glycol and dimethyl carbonate from by-product CO2

A technology of ethylene carbonate and dimethyl carbonate is applied in the field of continuous production technology of co-producing ethylene carbonate, ethylene glycol and dimethyl carbonate with by-product CO2 as raw materials, and can solve the problem of huge separation equipment and high energy consumption problem, to achieve the effect of high process efficiency, low labor cost, and improved production efficiency

Inactive Publication Date: 2013-10-23
山东日新复合材料有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] The direct hydration of ethylene oxide to ethylene glycol has a history of more than 30 years, and the production of ethylene glycol has made great progress. However, in order to improve its selectivity in actual production, the molar ratio of water to ethylene glycol is generally increased to 10-25:1, the selectivity of ethylene glycol is 88-90%, the mass fraction of ethylene glycol in the reaction solution is only 5-10%, the rest is a large amount of water and by-products D ethylene glycol, T ethylene glycol , the separation equipment is huge, the energy consumption is high, the catalyst is a homogeneous system, batch reaction

Method used

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Examples

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Effect test

Embodiment Construction

[0008] Example 1, first fix the fixed bed tubular reactor, add spherical catalyst into it, add ethylene oxide with metering pump, add after vaporization, add carbon dioxide with gas mass flow meter, ethylene oxide, carbon dioxide The flow rate of 1200 liters per hour is added, and the fixed-bed tubular reactor is heated to 150°C with an electric heating belt. The flow rate and temperature of the two are well controlled. The gas enters the horizontal condenser, becomes liquid after cooling, and enters the buffer tank to obtain The product ethylene carbonate, after rectification and purification, can obtain a product with a purity of 99.0 or more, then add ethylene carbonate to excess methanol in a ratio of 3:1, stir well, heat and vaporize, and control the flow rate to 1000 liters per hour And 1.0Mpa pressure, through a fixed-bed catalytic reactor at 130°C, distill at normal pressure and 80°C, and distill out dimethyl carbonate and methanol azeotrope from the top of the tower, u...

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PUM

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Abstract

The invention discloses a technology for continuous co-production of ethylene carbonate, ethylene glycol and dimethyl carbonate from ethylene oxide and CO2. The technology includes: adding a catalyst into a fixed bed tubular reactor and conducting heating, passing the ethylene oxide and CO2 through a first fixed bed tubular reactor continuously to generate ethylene carbonate, vaporizing the ethylene carbonate and methanol, then passing them through a second fixed bed tubular reactor continuously, thus generating ethylene glycol and dimethyl carbonate. The technology has the characteristics of raw material saving, labor cost saving, continuous production, high production efficiency, and change of the by-product CO2 into things of value, and environmental protection.

Description

technical field [0001] The present invention relates to the by-product CO 2 It is a continuous production process for the co-production of ethylene carbonate, ethylene glycol and dimethyl carbonate as raw materials. Background technique [0002] The direct hydration of ethylene oxide to ethylene glycol has a history of more than 30 years, and the production of ethylene glycol has made great progress. However, in order to improve its selectivity in actual production, the molar ratio of water to ethylene glycol is generally increased to 10-25:1, the selectivity of ethylene glycol is 88-90%, the mass fraction of ethylene glycol in the reaction solution is only 5-10%, the rest is a large amount of water and by-products D ethylene glycol, T ethylene glycol , The separation equipment is huge, the energy consumption is high, the catalyst is a homogeneous system, and the batch reaction is carried out. Contents of the invention [0003] In order to overcome the above-mentioned de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/38C07C31/20C07C29/128C07C69/96C07C68/06
CPCY02P20/52
Inventor 谭光辉金朝生孙怀志张予洋
Owner 山东日新复合材料有限公司
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