Recovery of (1-S)-2-oxo-bornane-10-sulphonate

Details Recovery of (1-S)-2-oxo-bornane-10-sulphonate Recovery of (1-S)-2-oxo-bornane-10-sulphonate

1977-05-11

1979-02-13

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26050114, 260564A, C07C14320

Patent

active

041395557

ABSTRACT:
A process has been developed for the recovery of (1-S)-2-oxo-bornane sulphonic acid (D-camphor-.beta.-sulphonic acid) from contaminated aqueous solutions, particularly from those which arise as mother liquors from the resolution of the racemates of amino compounds wherein said solutions are treated with guanidine bases (or soluble salts thereof) of the formula ##STR1## in which Ar is an optionally substituted aryl radical at pH about 3.5 to 7.5 and the guanidinium camphorsulphonate is separated off and split. The process is effective even where the mother liquors are contaminated with large amounts of inorganic salts.

REFERENCES:
patent: 3520926 (1970-07-01), Bollag et al.
patent: 3816531 (1974-06-01), Bruce et al.
patent: 4049703 (1977-09-01), Buss

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