Patent · US Expired

Preparation of N-phenyl-1-naphthylamine

US6133480A · kind A · utility

1Cited by

2References

12Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Horst Behre · Odenthal, DE
Helmut Fiege · Leverkusen, DE
Wolfgang Eymann · Neunburg vorm Wald, DE
Frank Arndt · Krefeld, DE
Rudolf Wiemers · Meerbusch, DE
Alexander Klausener · Neunburg vorm Wald, DE

Key dates

Filing date	Dec 10, 1998
Grant date	Oct 17, 2000
Priority date	—
Expiry date	Dec 10, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

N-Phenyl-1-naphthylamine can be prepared by reaction of aniline and 1-naphthylamine in the liquid phase at 100-400.degree. C. under normal pressure, a catalyst mixture comprising boron and fluorine being employed. Such catalyst mixtures can be obtained, for example, by reaction of hydrogen fluoride, boric acid and aniline and/or 1-naphthylamine. The catalyst is recovered and can be employed again. The reaction can be carried out discontinuously or continuously.

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