N, N′-Dicyclohexyl-N″-Isotridecylguanidine as Suppressor for the Next Generation Caustic Side Solvent Extraction (NG-CSSX) Process

Author： Duncan Nathan C. Roach Benjamin D. Williams Neil J. Bonnesen Peter V. Rajbanshi Arbin Moyer Bruce A.

Publisher： Taylor & Francis Ltd

ISSN： 0149-6395

Source： Separation Science and Technology, Vol.47, Iss.14-15, 2012-01, pp. : 2074-2087

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Abstract

The purity, concentration, and source of the N,N′-dicyclohexyl-N″-isotridecylguanidine (DCiTG) suppressor (guanidine) used in the NG-CSSX process were found to influence solvent performance. As the starting isotridecanol used in the preparation of DCiTG is comprised of a mixture of branched-chain aliphatic alcohols, varying in composition with manufacturer, the resulting DCiTG itself is a mixture. Thus, it is necessary to address how the solvent performance will be affected by the different preparations of the DCiTG solvent component. In this study, four preparations of DCiTG from three sources were analyzed and evaluated for purity and performance, both in the absence and presence of a deliberately added anionic surfactant impurity.