Process for obtaining para-cresol and meta-cresol from a mixture

Details Process for obtaining para-cresol and meta-cresol from a mixture Process for obtaining para-cresol and meta-cresol from a mixture

1979-06-29

1981-05-12

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568750, C07C 3768, C07C 3774

Patent

active

042673925

ABSTRACT:
Para-cresol and meta-cresol are separated from a mixture of methylated and ethylated phenols by a two-stage process wherein the para-cresol is preferentially complexed with one or more anhydrous or dehydrated inorganic salts selected from calcium bromide, lithium bromide, manganese bromide and magnesium chloride. Then the meta-cresol is successively preferentially complexed with calcium bromide from the mixture of methylated and ethylated phenols from which the para-cresol complex has been removed. The anhydrous or dehydrated inorganic salt is added to the mixture of methylated and ethylated phenols including para-cresol and meta-cresol in an amount to give a mole ratio of the salt to para-cresol in the mixture in the range of about 0.5 to one to about 1.5 to one. The para-cresol-salt complex is removed from the mixture of methylated and ethylated phenols and then decomposed to recover the para-cresol. The mixture of methylated and ethylated phenols including meta-cresol from which the para-cresol has been removed has added to it calcium bromide in an amount to give a mole ratio of calcium bromide to meta-cresol in the mixture in the range of about 0.5 to one to around 1.0 to one. The addition is performed in the presence of a non-aqueous solvent and at a temperature in the range of -10.degree. C. to about 40.degree. C. The meta-cresol-salt complex is separated from the second mixture of methylated and ethylated phenols and the complex is decomposed to produce a high purity meta-cresol.

REFERENCES:
patent: 1980384 (1934-11-01), Comte
patent: 2366538 (1945-01-01), Luten et al.
patent: 2835714 (1958-05-01), Nixon et al.
Sharpless, et al., "Journ. Organic Chemistry", vol. 40, No. 9 (1975), pp. 1252-1257.

Affiliated with

Also associated with

Rating

Process for obtaining para-cresol and meta-cresol from a mixture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for obtaining para-cresol and meta-cresol from a mixture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for obtaining para-cresol and meta-cresol from a mixture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2048109