Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By contact with solid sorbent
Patent
1989-11-20
1990-09-11
Caldarola, Glenn
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By contact with solid sorbent
C07C 712
Patent
active
049565222
ABSTRACT:
A chromatographic process able to separate para-ethyltoluene from feed mixtures of C.sub.8 and/or C.sub.9 aromatic hydrocarbons. In the process, the para-ethyltoluene-containing feed mixture is contacted with a Y zeolite adsorbent having potassium at exchangeable cationic sites. The para-ethyltoluene is selectively adsorbed onto the adsorbent. The non-adsorbed components of the feed are then removed from the adsorbent and the para-ethyltoluene recovered by desorption with tetralin or alkyl or dialkyl derivatives of tetralin or alkyl derivatives of naphthalene. The other C.sub.9 's and the xylene isomers in the raffinate and p-ethyltoluene in the extract can be separated from the heavy desorbent by fractionation of the raffinate or extract and the desorbent recycled to the process.
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Caldarola Glenn
Hall Jack H.
McBride Thomas K.
Spears Jr. John F.
UOP
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