The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 1989
Filed:
Nov. 25, 1987
Applicant:
Inventors:
Bernhard Albrecht, Buus, CH;
Jurgen Beyrich, Huttingen, DE;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
564412 ; 568709 ;
Abstract
The invention relates to a process for the preparation of chloronitroanilines or chloronitrophenols, which comprises chlorinating nitroanilines or nitrophenols in hydrochloric acid by adding simultaneously separate streams of nitroanilines or nitrophenols and of a chlorinating agent to said hydrochloric acid. The process affords pure products in good yield. An accumulation of chlorine during the reaction is avoided. Chloronitroanilines and chloronitrophenols are useful intermediates for the snythesis of disperse dyes.