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CRYSTALLIZATION KINETICS AND INTERFACIAL-TENSIONS OF CYANAZINE PRECIPITATED FROM AQUEOUS-ETHANOL SOLUTIONS

HURLEY, LA; JONES, AG; DRUMMOND, JN; (1995) CRYSTALLIZATION KINETICS AND INTERFACIAL-TENSIONS OF CYANAZINE PRECIPITATED FROM AQUEOUS-ETHANOL SOLUTIONS. PROCESS SAF ENVIRON , 73 (B1) 52 - 58.

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Abstract

A desirable move away from hydrocarbon-based emulsifiable herbicide concentrates towards aqueous dispersible concentrates requires understanding and control of the crystal precipitation process. In this study, induction periods of the organic herbicide cyanazine (Blandex(TM)) in aqueous ethanol solutions are measured as a function of supersaturation and analysed to infer the mechanism of crystallization and the interfacial tension.The data are consistent with models of primary nucleation followed by either polynuclear or diffusion-controlled growth respectively with inferred interfacial tensions comparable to those determined from independent solid-liquid contact angle measurements. Primary nucleation is found to be either heterogeneous or homogeneous depending on the supersaturation range (low and high respectively).

Type: Article
Title: CRYSTALLIZATION KINETICS AND INTERFACIAL-TENSIONS OF CYANAZINE PRECIPITATED FROM AQUEOUS-ETHANOL SOLUTIONS
Keywords: CRYSTAL GROWTH, CYANAZINE, INTERFACIAL TENSION, NUCLEATION
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/79510
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