Nouryon Chemicals International B.v.

Natalija Smolko Schwarzmayr

Jan Olof Gustafsson

Louis Schwarzmayr

Rudolf Antonius Maria Venderbosch

Hanna Ingrid Birgitta Jacobson Ingemyr

Alexander Michael Wetzel

Charlotte Ewa Karin Gustafsson

The present disclosure relates to a collector composition containing (i) as a primary collector the compound of the formula (I) wherein R is an alkyl group containing between about 5 and about 16 carbon atoms that may be branched or linear, k is a value of about 1 to 3, m is an integer from about 0 to about 25, each A independently is —CH2-CH2- or —CH2CH(CH3)- or —CH2-CH(CH2-CH3)-, n is an integer of at least about 3 and at most about 8, and wherein X is an anion derivable from deprotonating a Brønsted-Lowry acid, and (ii) a second compound selected from the group of other primary collectors, secondary collectors, depressants, frothers, and solvents. The disclosure also relates to a process to treat siliceous ore that contains a step of froth flotating in the presence of a collector composition that contains the primary collector compound.

Collector composition containing biodegradable compound and process for treating siliceous ores

The present disclosure relates to a process to prepare esters of an amino carboxylic acid of the formula (I) comprising the steps of reacting an aminocarboxylic acid present as a cyclic amide of the formula II and an alkanol of the formula R&#x2014;(O-A)mOH in the presence of the Br&#xf8;nsted-Lowry acid at a temperature of between 60 and 200 degrees C. wherein the total molar amount of aminocarboxylic acid to the molar amount of the alkanol is between 1:0.8 and 1:1.5 and wherein the Br&#xf8;nsted-Lowry acid is not added to the reaction mixture until least 50% of the total of the alkanol and cyclic amide are added to the reaction mixture.

Esters of amino carboxylic acids and a process to prepare them

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Hjälteby, Sweden

Natalija Smolko Schwarzmayr