Patent · US Expired

Process for preparing 1-amino anthraquinone

US4003924A · kind A · utility

1Cited by

1References

13Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Wolfgang Auge
Karl-Werner Thiem · Charleston, US
Rutger Neeff
Paul Losacker · Leichlingen, DE
Rudolf Braden

Key dates

Filing date	Feb 3, 1975
Grant date	Jan 18, 1977
Priority date	—
Expiry date	Feb 3, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C225/34
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

1-Amino anthraquinone is prepared by reacting 1-nitro-anthraquinone with ammonia in water and/or an organic solvent and thereafter treating the 1-amino-anthraquinone imine formed with water thereby converting said imine into 1-amino anthraquinone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.