Patent · US Active

Polyester polyquaternary ammonium compound collectors for reverse froth flotation of silicates from nonsulfidic ores

US10100146B2 · kind B2 · utility

1Cited by

0References

9Claims

0Family size

Assignee

Akzo Nobel Chemicals International B.V · NL

Inventors

Natalija Smolko-Schvarzmayr · Hjälteby, SE
Anders Klingberg

Key dates

Filing date	Dec 15, 2014
Grant date	Oct 16, 2018
Priority date	—
Expiry date	Feb 27, 2035

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB03D2203/06
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a compound obtainable by the condensation of a polyol having 3-4 hydroxyl groups, adicarboxylic acid or a derivative thereof, an alkanolamine and a fatty acid, followed by reaction with an alkylating agent. This compound is useful as a collector in a process for the reverse froth flotation of non-sulfidic ores containing silicate as impurities, especially phosphate ores.

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