Process for manufacturing crystal violet lactone

Details Process for manufacturing crystal violet lactone Process for manufacturing crystal violet lactone

1977-03-17

1978-02-28

Milestone, Norma S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260391, C07D30788

Patent

active

040767280

ABSTRACT:
Crystal Violet Lactone (CVL) is produced in high yield and highly pure form by a process comprising condensing Michlers hydrol with 3-dimethylaminobenzoic acid to form leuco CVL, extracting the reaction mixture containing the leuco CVL with an aromatic hydrocarbon solvent, such as toluene, or a mixture of such a solvent and a water-immiscible alkane, such as heptane, to remove impurities therefrom and treating the extracted reaction mixture with an inorganic oxidizing agent to convert the leuco CVL to CVL.

REFERENCES:
patent: RE23024 (1948-08-01), Adams
patent: 2742483 (1956-04-01), Crounse
patent: 3842103 (1974-10-01), Smith
patent: 3845077 (1974-10-01), Hughes
patent: 3987062 (1976-10-01), Okada et al.

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