Process for crystallizing chroman-I from an impure mixture

Details Process for crystallizing chroman-I from an impure mixture Process for crystallizing chroman-I from an impure mixture

1995-08-01

1998-06-30

Richter, Johann

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31158

Patent

active

057736332

ABSTRACT:
A process is employed for the isolation and crystallization of chroman-I from an impure mixture, by heating the crude mixture, mixing acetone with the hot mixture to obtain a solids-free solution and crystallizing the chroman-I from the solution. Repeated cycles of the process yield high purity chroman-I in good yield.

REFERENCES:
patent: 3825562 (1974-07-01), General Electric Co.
patent: 4240968 (1980-12-01), General Electric Co.
Lubos Konecny, CA 110:7835, (1989).

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