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UID:20260711T101737EDT-7180zzk2ad@132.216.98.100
DTSTAMP:20260711T141737Z
DESCRIPTION:Frother Function-Structure Relationship:\nDependence of CCC95 o
 n HLB\nA prime function of frothers is reducing bubble size in\nflotation 
 systems. The objective of this project is to relate\nbubble size reduction
  – summarized by CCC95 (Critical Coalescence\nConcentration) – to frother 
 structure represented by HLB\n(Hydrophilic-Lypophilic Balance). The experi
 mental frothers -\naliphatic alcohols (1-Alcohol) and Polyglycols (Polypro
 pylene\nGlycols and Propylene Glycol Ethers) - were selected to give a wid
 e\nrange in structure-related parameters n (number of carbons in alkyl\ngr
 oups) and m (number of propylene oxide groups). Bubble size\n(Sauter Mean 
 Diameter D32) was measured in a 700 L mechanical\nflotation cell – a Metso
  RCSTM 0.8 m3 pilot unit. The D32 data were\nfitted to a 3-parameter model
  to determine the CCC95 which\nrepresents the concentration giving the min
 imum D32. The HLB was\ncalculated using the Davies equation. A CCC95-HLB r
 elationship\ndependent on frother family was demonstrated. To extend to\nc
 ommercial frothers whose structures are uncertain\, NMR\nspectroscopy was 
 used to identify the frother family and estimate\nthe HLB. It appears that
  the CCC95 value for a commercial frother\ncan be estimated directly from 
 its molecular structure by using NMR\nspectroscopy.\n \n \n
DTSTART:20110401T200000Z
DTEND:20110401T200000Z
LOCATION:Wong Building\, CA\, QC\, Montreal\, H3A 0C5\, 3610 rue University
SUMMARY:Graduate Seminar - Wei Zhang\, PhD Candidate
URL:/channels/event/graduate-seminar-wei-zhang-phd-can
 didate-173408
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