Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1987-12-08
1991-09-10
Elmore, Carolyn
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564125, C07B 6300, C07C1034
Patent
active
050475878
ABSTRACT:
A process is disclosed for the purification of the diamide of oxalic acid obtained by means a process wherein copper catalysts are used, by means of the washing with aqueous solutions of an ammonium salt of an organic or inorganic acid, operating at a pH value comprised within the range of from 2 to 8, and at a temperature comprised within the range of from 40.degree. to 150.degree. C.
REFERENCES:
patent: 3776957 (1973-12-01), Newkirk
patent: 3989753 (1976-11-01), Riemenschneider et al.
Bruzzi Vittorio
Lorenzoni Loreno
Messina Giuseppe
Elmore Carolyn
Enichem Anic S.p.A.
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