2 replies to this topic

[Glicol]

Dear Randall Elenbaas

We are students of the Chemical Industries Project course, which is part of the curricula of the Chemical Engineering graduation at Instituto Superior Técnico, the largest Portuguese engineering university.

Our work in this course consists of a project of a new plant in the production of ethylene glycol by hydrolysis of ethylene oxide , covering several issues including selection of manufacturing technology, mass and heat balances, equipment sizing and specification and feasibility evaluation. We've found your topic in www.cheresources.com forum and we wonder if you can help us. We have also done a lot of patent research and decided to use the BASF process, but they don't give any kind of information about the reactors conditions. We don't now the residence time and the kinetics of the reactions. Can you retrieve any kind of information that can help us?

We will be most grateful by any cooperation you can give us on the above-mentioned subjects.

Looking forward to hearing from you, we remain,

Yours faithfully,

Ana Luisa Serra
José Francisco Castro
Rui Monteiro

[Padmakar Katre]

Dear,
Please follow the link below and I hope your search will end up with this link. I worked with Ethylene Oxide and Ethylene Glycol plant since pre-commissioning, commissioning to steady state opertaion and next to revamp for capacity expansion. The ethylene oxide hydrolysis is carried out in a PFR with a residence time of 17 min. This reactions uses the EO to Water Molar feed ratio around 1:22 depending on the selective conversion i.e. MEG or its oligomers like DEG and TEG onwards. As it seems to be psudo fisrt order reaction as the water is an excess and its concentraion is not taken into consideration while studying the kinetics and the rate law equation will be in terms of the EO. But the reaction has by products like DEG and other heavy oligomers in which unreacted EO reacts with the respective formed glycols to give the heavy oligomer. And this reaction kinetics is studied as the 4th Order reaction and is available on the link below
http://www3.intersci...n...=1&SRETRY=0

There are three licensors for this technology i.e. EO-EG
1. Scientific Design Inc.
2. Shell Inc.
3. Dow Chemicals (Union Carbide Technology).

I hope this will help you to understand a little about your query.