Process for the production of polyamines

Details Process for the production of polyamines Process for the production of polyamines

1973-07-30

1976-12-07

Hines, Robert V.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453AM, 260471R, C07C 8728

Patent

active

039962830

ABSTRACT:
An improved process for the production of multi-nuclear aromatic polyamines by condensing an aromatic amine with formaldehyde in the presence of an acid catalyst, obtaining the condensation product in an aqueous medium and then extracting the aqueous condensation mixture with a hydrophobic solvent in order to obtain a solvent phase and a separate aqueous phase. Thereafter polyamine product is recovered from the solvent phase. If desired, polyamine product can be obtained from both the solvent phase and the aqueous phase. Alternatively, the aqueous phase can be recycled to the initial condensation step, thus providing a continuous process without loss of acid catalysts.

REFERENCES:
patent: 1954484 (1934-04-01), Mattison
patent: 2818433 (1957-12-01), Erickson
patent: 2938054 (1960-05-01), Demers et al.
patent: 3175007 (1965-03-01), Berhenke
patent: 3358025 (1967-12-01), Foster et al.
patent: 3478099 (1969-11-01), Ross et al.
patent: 3496229 (1970-02-01), Powers et al.
patent: 3728310 (1973-04-01), Sundholm et al.
Beilsteins, "Handbuch der Organischen Chemie", XIII, pp. 70-71 and 237-239.

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