Process for reducing aromatic halo-dinitro-diols in the presence

Details Process for reducing aromatic halo-dinitro-diols in the presence Process for reducing aromatic halo-dinitro-diols in the presence

1993-01-11

1994-11-01

Hollrah, Glennon H.

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

Organic compounds

Amino nitrogen containing

564423, C07C20936

Patent

active

053609328

ABSTRACT:
An aromatic diamino-diol (such as 4,6-diaminoresorcinol) is made by reducing an aromatic halo-dinitro-diol (such as 2-halo-4,6-dinitroresorcinol) with molecular hydrogen in an aqueous mixture containing a noble metal hydrogenation catalyst, an aqueous solvent and about 2 moles of hydrogen halide per mole of aromatic halo-dinitro-diol, plus an additional quantity sufficient to provide a 0.75 to 4 molar solution of the hydrogen halide.

REFERENCES:
patent: 3079435 (1963-02-01), Freifelder
patent: 4766244 (1986-10-01), Lysenko
patent: 5001265 (1989-07-01), Liu et al.

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