Patent · US Expired

Process for preparing aminonaphthalene derivatives in a titanium or titanium alloy reactor

US4065492A · kind A · utility

2Cited by

0References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Georg Spielberger
Hermann Wunderlich
Gunther Klag · Leverkusen, DE
Marko Zlokarnik · Cologne, DE

Key dates

Filing date	Jun 22, 1976
Grant date	Dec 27, 1977
Priority date	—
Expiry date	Jun 22, 1996

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C209/18
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Aminonaphthalene derivatives are prepared by reacting the corresponding naphthol derivative with ammonia or amines in the presence of bisulfites. The reaction is carried out in a continuous procedure in reaction apparatus which consists wholly or partly of titanium or a titanium alloy, carbon largely excluded. Suitable alloys are titanium/palladium, titanium/nickel or titanium/molybdenum.

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