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:
Jun. 29, 1976
Filed:
Apr. 25, 1975
Wilhelm Vogt, Knapsack near Cologne, DT;
Hubert Neumaier, Hermulheim near Cologne, DT;
Erich Schallus, Cologne-Klettenberg, DT;
Gunter Peantek, Hermulheim near Cologne, DT;
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Abstract
Production of alkali metal salts of amino polycarboxylic acids by reaction of a suitable carboxylic acid nitrile with aqueous alkali at elevated temperature. The salts are produced from an amino polycarboxylic acid nitrile suspension in an aqueous alkali metal hydroxide solution, which has a minimum strength of substantially 30 % by weight and contains at least stoichiometric proportions of alkali metal hydroxide; the suspension is introduced into a reactor heated to a temperature between 60.degree. and 150.degree. C, and salt formation is effected by thorough agitation.