Collecting problems encountered in the production of ethylene oxide and ethylene glycol plants
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This post was last edited by jacques0920 on 2017-1-17 08:28. Hello, fellow sailors – ethylene oxide and ethylene glycol plants are important downstream production facilities for the cracking of ethylene. To facilitate everyone’s learning and exchange regarding the process equipment and flowcharts of ethylene oxide and ethylene glycol plants, we have compiled the problems encountered in the production of such plants. Either the SD or SHELL method will do; the main purpose is to make it easier for everyone to learn*. Participants receive financial rewards. :)
Two problems with the Shell process: 1. There is no thermal siphon circulation for the steam condensate between the ethylene oxide reactor and the high-pressure drum, requiring forced circulation via a pump (the Shell design includes only one pump). Shell and the engineering company also failed to identify the cause. Let’s discuss it – how many companies in China that use the Shell process are capable of achieving automatic circulation? 2. The aldehyde content in ethylene glycol exiting the purification tower is relatively high. Although aldehydes can be reduced to below 8 ppm using dealdehyde resins, this goes far beyond the original purpose of using such resins. The aldehyde should still be removed during the concentration, dehydration, and purification process of ethylene glycol at the earlier stage. Let’s discuss the dealdehyde ratio for each process and its actual effects.
What was the original purpose of dealdehyde resins? Could you explain that, sir?