Patent · US Expired

Process for the preparation of 1,5- and 1,8-diamino-anthraquinone

US3933868A · kind A · utility

1Cited by

0References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karl-Werner Thiem · Charleston, US
Wolfgang Auge
Rutger Neeff
Heinz Scheiter · Leverkusen, DE

Key dates

Filing date	Mar 22, 1974
Grant date	Jan 20, 1976
Priority date	—
Expiry date	Mar 22, 1994

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B1/20
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Process for the preparation of 1,5- and/or 1,8-diaminoanthraquinone by reaction of 1,5- and/or 1,8-dinitroanthraquinone with ammonia in organic solvents, characterised in that the reaction is carried out in ethers, aliphatic or cycloaliphatic hydrocarbons or optionally alkyl-substituted aromatic hydrocarbons or in mixtures of these compounds.

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