Complex formed for separating isopropylated m-cresols
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United States of America Patent
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Sep 4, 1984
Issued Date -
N/A
app pub date -
Jan 3, 1984
filing date -
Apr 26, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is disclosed for separating 5-isopropyl-m-cresol from other isopropylated m-cresols by treating a mixture of the isopropylated m-cresols with a metal halide salt. The metal halide salt preferentially forms a complex with 5-isopropyl-m-cresol over other related closely-boiling isopropylated m-cresols in the mixture. The preferentially-formed complex of 5-isopropyl-m-cresol may then be isolated from the mixture and the complex decomposed to provide a product substantially enriched in, or substantially entirely composed of, 5-isopropyl-m-cresol. The process is particularly suitable for isolating 5-isopropyl-m-cresol from closely-boiling isomers, and di-isopropylated m-cresols.
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