Title: Use of a derivative of aspartic acid as a collector in froth flotation processes
Application Number: 200480033352 Application Date: 2004.11.05
Publication Number: 1878616 Publication Date: 2006.12.13
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: B03D1/02,B03D1/004,B03D1/01,B03D1/06,C07C229/24
Applicant(s) Name: Akzo Nobel NV Address:
Inventor(s) Name: Eisenhuth Ludwig, Henriksson Elisabeth
Attorney & Agent: lin bainan liu jinhui
Abstract:
     A derivative of aspartic acid is used as a collector for a phosphate containing mineral, such as apatite, in a froth flotation process. According to the invention the collector has a high selectivity for phosphate containing minerals even in the presence of carbonate minerals, such as calcite. The derivative has the formula (I) ,where R is a hydrophobic group containing a hydrocarbon group of 6-24 carbon atoms; R is an alkyl group with 1-7 carbon atoms or a group of the formula (B)yH, in which B is an alkyleneoxy group with 2-4 carbon atoms and y is a number from 1 to 10; and M is a group selected from the group consisting of a cation or hydrogen. Methods for producing the derivative are also described.
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