Process for separating 2,6-xylenol from a mixture of cresylic ac

Details Process for separating 2,6-xylenol from a mixture of cresylic ac Process for separating 2,6-xylenol from a mixture of cresylic ac

1975-05-22

1977-03-22

Bernstein, Hiram H.

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 29, 203 38, 260621A, 260627G, C07C 3722, B01D 314

Patent

active

040135209

ABSTRACT:
A mixture of cresylic acids containing a substantial amount of 2,6-xylenol is contacted with an ester-forming phosphorus compound in an amount in the range of 0.5 to 5.0 equivalents per equivalent of cresylic acids other than 2,6-xylenol. The temperature is in the range of 50.degree.-250.degree. C., and a catalyst may or may not be employed. Under these conditions, aryl phosphates are formed more rapidly from the cresylic acids other than the 2,6-xylenol. The substantially unreacted 2,6-xylenol is readily separated from the aryl phosphates.

REFERENCES:
patent: 2870192 (1959-01-01), Bonstedt
patent: 3077491 (1963-02-01), Seglin
Journal of the Chemical Society, Sec. C., Organic Chem., Part 1, pp. 815-818, London, The Chemical Society, 1968.

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