Process for producing methylene dianiline

Details Process for producing methylene dianiline Process for producing methylene dianiline

1977-02-02

1978-12-19

Hines, Robert V.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 8526

Patent

active

041305884

ABSTRACT:
A process for producing polyamines such as methylene dianiline wherein an aromatic amine such as aniline is reacted with formaldehyde in the presence of an acid catalyst sufficient water is employed to cause a separation into an aqueous phase and an organic phase and the methylene dianiline is extracted with a solvent said process is improved by employing as the solvent a mixture of aniline and either a water immiscible organic solvent such as orthodichlorobenzene or conducting the extraction in the presence of a water soluble inorganic salt such as zinc nitrate or a combination thereof.

REFERENCES:
patent: 3478099 (1969-11-01), Ross et al.
patent: 3576875 (1971-04-01), Rohe
patent: 3952042 (1976-04-01), Knofel
patent: 3996283 (1976-12-01), Knofel
McCoy et al., "Chemistry and Industry", Apr. 18, 1970, pp. 531-532.

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