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. 08, 2016
Filed:
Dec. 17, 2013
Akzo Nobel Chemicals International B.v., Amersfoort, NL;
Jan Olof Gustafsson, Kungälv, SE;
Christina Josefin Lannefors, Göteborg, SE;
AKZO NOBEL CHEMICALS INTERNATIONAL B.V., Amersfoort, NL;
Abstract
The present invention relates to the use of a polyquaternary polymer obtainable by reacting i) a dialkylamine having the structure RRNH, where Rand Rindependently are hydrocarbyl groups having 1-3 carbon atoms; ii) a difunctional compound selected from the group consisting of epihalohydrins, diepoxides, precursors of epihalohydrins and epoxides which under alkaline conditions are readily converted into the corresponding epoxy compounds, and mixtures thereof; and iii) optionally a polyfunctional amine selected from the group consisting of ammonia, primary amines, alkylenediamines having 2-6 carbon atoms, and polyalkylenepolyamines having the structure HN—[R—N(R)]—R—NH, where y is an integer from 1 to 5, Ris an alkylene radical having 2 to 6 carbon atoms, and Ris selected from the group consisting of hydrogen, a hydrocarbyl group having 1-3 carbon atoms, and an ω-aminoalkyl group having 2 to 6 carbon atoms; as a depressant in a method for froth flotation of potash ores.