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STTR Phase II: Chemical Sensors for In Situ Monitoring of Collector Chemicals…

Award Information

National Science Foundation
Award ID:
Program Year/Program:
2011 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Phase II
Solicitation Number:
Small Business Information
United Science, LLC
15911 Furuby Rd. Center City, MN 55012-
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2011
Title: STTR Phase II: Chemical Sensors for In Situ Monitoring of Collector Chemicals in Complex Copper Mine Effluents
Agency: NSF
Contract: 1058472
Award Amount: $516,000.00


This Small Business Technology Transfer (STTR) Phase II project addresses unmet analysis needs of froth flotation, a separations process widely used in the mining industry to separate worthless gangue from desired mineral particles. Phase I work has demonstrated the preparation of sensor membranes that permit the measurement of collector chemicals used in flotation suspensions. These sensors have been shown to be ideally suited for these measurements since they are not affected by turbidity, have high selectivity for collectors, and require no off-stream sample handling. The project will take advantage of the highly selective and fouling-resistant fluorous perfluoropolymer membranes introduced by the academic partner Phil Buhlmann. The Phase II project will optimize the sensing membrane characteristics to improve ion conduction and robustness. It will also assess the factors that affect sensor lifetime and engineer several prototypes to test at mining operations. The broader impacts of this research are significant as it will enable the mining industry to be more sustainable in its approach to mineral recovery. Specifically, the research aims to significantly reduce the amount of toxic chemical waste associated with froth flotation and its inevitable environmental impact. The method has the potential of making the U.S. copper industry more competitive by reducing wasted collector while simultaneously improving mining sustainability by eliminating an estimated 24 tons of unnecessary chemical discharges. In addition to these benefits, the multidisciplinary aspects of this project will train students in synthetic and analytical techniques, involving concepts from chemistry, materials science, and engineering.

Principal Investigator:

Jon D. Thompson

Business Contact:

Jon D. Thompson
Small Business Information at Submission:

United Science LLC
15911 Furuby Rd Center City, MN 55012-0000

EIN/Tax ID: 260477557
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
United Science LLC
15911 Furuby Rd
Center City, MN 55012-0000
Contact Phone: 6512136185