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. 11, 1980
Filed:
Mar. 28, 1979
Applicant:
Inventors:
Gerhard Kilpper, Battenberg, DE;
Johannes Grimmer, Ludwigshafen, DE;
Assignee:
BASF Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
562458 ;
Abstract
Anthranilic acid is manufactured continuously by reacting an alkali metal phthalamate and/or phthalimidate with an alkali metal hypohalite in a reaction tube, the resulting anthranilic acid being treated, during or after the reaction, with reducing agents in two steps, the reducing agents employed in the two steps being different from one another, and an alkali metal dithionite or alkali metal formaldehyde-sulfoxylate being used as the reducing agent in the second treatment step. The product is a starting material for the preparation of dyes, crop protection agents and scents.