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Selective flocculation in heterosterically stabilised nonaqueous dispersions
Colloids and Surfaces, 1980Abstract The incipicient flocculation behaviour of poly(vinyl acetate) particles stabilised by polystyrene and of polyacrylonitrile particles stabilised by polyisobutylene has been investigated as a function of temperature using cyclopentane as the dispersion medium. It was found that the polystyrene stabilished particles flocculated at both an upper
Melvin D. Croucher, Michael L. Hair
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Polymeric Flocculants and Selective Flocculation An Overview
1982Behavior of fine particles in aqueous suspensions is markedly different as compared to those at sizes treated by conventional methods for economic recovery. Depletion of natural resources and environmental considerations coupled with the challenge presented by fine particle properties has led to increasing activity in the science and technology of fine
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International Journal of Mineral Processing, 1976
Abstract Polyacrylamide was modified to give a linear polymer containing 69% amide, 23% carboxylic and 8% hydroxamic acid groups. The modified polymer selectively flocculates cassiterite from mixtures with quartz in aqueous suspensions at a pH between 3.5 and 7.
C.R.A. Clauss, E.A. Appleton, J.J. Vink
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Abstract Polyacrylamide was modified to give a linear polymer containing 69% amide, 23% carboxylic and 8% hydroxamic acid groups. The modified polymer selectively flocculates cassiterite from mixtures with quartz in aqueous suspensions at a pH between 3.5 and 7.
C.R.A. Clauss, E.A. Appleton, J.J. Vink
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Continuous Recombinant Bacterial Fermentations Utilizing Selective Flocculation and Recycle
Biotechnology Progress, 1990AbstractSelective recycle has successfully been used to maintain an unstable plasmid‐bearing bacterial strain as dominant in a continuous reactor, whereas the culture reverts to 100% segregant cells when selective recycle is not used. The plasmid‐bearing strain is slower growing and flocculent; however, when the cells lose their plasmid, the resulting ...
K L, Henry, R H, Davis, A L, Taylor
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Latices as flocculants in selective flocculation of mineral suspensions
2009In contrast to polyelectrolyte flocculants, latices possess a certain degree of hydrophobicity, are compatible with flotation collectors and can be considered for use in a flotation circuit. In this study, three latices, polystyrene (PS), poly(2- ethylhexylmethacrylate) [P(EHMA)] and copoly(methyl acrylate - acrylic acid) [P(MAAA)] were prepared ...
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Purification of north Brazilian kaolin by selective flocculation
Minerals Engineering, 2002Abstract The main kaolin deposits in north Brazil present are contaminated with colored titanous impurities. Conventional beneficiation processes do not completely remove TiO 2 . The difficulty in separation is mainly due to the ultra-fine size of the minerals.
F. Larroyd, C.O. Petter, C.H. Sampaio
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Methodology for flocculant selection in fibre–cement manufacture
Cement and Concrete Composites, 2006Abstract In the Hatschek process used to produce fibre–cement products, it is necessary to use a suitable flocculant when asbestos is substituted by pulp fibres. The right selection of flocculant is crucial in the industrial process due to its effects on mineral fines retention, dewatering and formation and, as a consequence, on the overall ...
Carlos Negro +3 more
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Selective flocculation of chromite
2020ABSTRACT SELECTIVE FT.OCCUT.ATTON OP CHROMTTE BOT.ANDAKHTART, Farhad M.S. in Mining Engineering Supervisor: Assoc:. Prof. Dr. Ali ihsan Arol April 1993, 87 pages. Selective floooulation of chromite fines was investigated as a possible method of recovering valuable minerals from slimes which are too fine to be treated by conventional mineral processing ...
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Optimisation of selective flocculation of ultrafine iron ore
International Journal of Mineral Processing, 1994Abstract A laboratory scale selective flocculation process capable of recovering iron oxide from a sample of ultrafine (less than 10 μm) iron ore tailings containing kaolinite as the main gangue mineral has been developed. Experiments were carried out (i) to select the most appropriate flocculant from a large range of commercially available starches ...
P.K. Weissenborn, L.J. Warren, J.G. Dunn
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Selecting Particles for Fluidized‐Bed Bioreactors with Flocculent Biomass
Biotechnology Progress, 1986Designing a fluidized bed reactor for wastewater treatment or ethanol production reduces to choosing the size and density of the support particle. The need to fluidize the particles then fixes the flow rate and the required substrate removal fixes the bed height. Specific recommendations, depending on the kinetics of the process, are discussed.
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