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Ion exchange resin catalyst stability in in‐situ epoxidation
Author(s) -
Wood W.,
Termini J.
Publication year - 1958
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02640546
Subject(s) - ion exchange resin , catalysis , oxidizing agent , contamination , dissolution , hydrogen peroxide , metal , materials science , chemical engineering , ion exchange , raw material , chemistry , inorganic chemistry , metallurgy , ion , organic chemistry , ecology , engineering , biology
Summary The highly oxidizing conditions of expoxidation cause decross‐linking of the ion exchange resin catalyst, resulting in swelling of the resin with its eventual dissolution if uncontrolled. Minimum metal contamination (particularly iron), low hydrogen peroxide concentration, low reaction temperature, high cross‐linked resin catalyst, and the addition of a complexing agent all contribute to maintaining resin catalyst stability. Metal contamination is by far the most detrimental factor to resin stability. Operating with essentially a metal‐free system is most important. This can be obtained by using a resin with less than 0.005% metal contamination and by avoiding metal contamination from raw materials and equipment being used for epoxidation. A minimum of metal contamination and perhaps a lower operating temperature provide the most practical methods for controlling resin breakdown and for improving the efficiency of the ion exchange resin catalyst in in‐situ epoxidation processes. Avoiding resin breakdown is particularly essential for the fixed resin catalyst bed and for the resin recycle batch processes. Even for the expendable resin process where resin stability is not too critical, control of metal contamination and operating temperature should result in a trouble‐free and a more economical operation.