Molecular interactions at the solid liquid interface with special reference to flotation and solid particle stabilized emulsions
Identifieur interne : 002520 ( Main/Exploration ); précédent : 002519; suivant : 002521Molecular interactions at the solid liquid interface with special reference to flotation and solid particle stabilized emulsions
Auteurs : H. Schulman [Royaume-Uni] ; J. Leja [Royaume-Uni]Source :
- Kolloid-Zeitschrift [ 0368-6590 ] ; 1954-05-01.
Abstract
Summary: The experiments carried out with a variety of pure surface active agents, employed in flotation of ores as either collectors or frothers, show that (a) long chain homologues of alcohols and alkyl sulphates react strongly with xanthates at the air/liquid interface (Langmuir-trough experiments), (b) the molecular interactions between frothers and collectors occur at the solid/liquid interface — if the solid is suitably coated by collector molecules (frother adsorption tests), (c) the effects of molecular associations collector-frother are evident in frothing and flotation results. The measurements of air/water/solid and oil/water/solid contact angles (carried out under variable conditions as regards concentration of the surface active agents, pH, time of conditioning and presence of complexing agents in the oil phase) reveal the importance of the density of collector-coverage. The results have been applied to the stability and to the inversion of phase-continuity of oil/water emulsions stabilized by solid powders. A mechanism for attachment of suitably collectorcoated particles to an air bubble is postulated.
Url:
DOI: 10.1007/BF01519814
Affiliations:
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Schulman</name><affiliation wicri:level="4"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Ernest Oppenheimer Laboratory, Department of Colloid Science, The University of Cambridge</wicri:regionArea><placeName><settlement type="city">Cambridge</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Angleterre de l'Est</region></placeName><orgName type="university">Université de Cambridge</orgName></affiliation></author><author><name sortKey="Leja, J" sort="Leja, J" uniqKey="Leja J" first="J." last="Leja">J. Leja</name><affiliation wicri:level="4"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Ernest Oppenheimer Laboratory, Department of Colloid Science, The University of Cambridge</wicri:regionArea><placeName><settlement type="city">Cambridge</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Angleterre de l'Est</region></placeName><orgName type="university">Université de Cambridge</orgName></affiliation></author></analytic><monogr></monogr><series><title level="j">Kolloid-Zeitschrift</title><title level="j" type="abbrev">Kolloid-Zeitschrift</title><idno type="ISSN">0368-6590</idno><idno type="eISSN">1435-1536</idno><imprint><publisher>Springer-Verlag</publisher><pubPlace>Berlin/Heidelberg</pubPlace><date type="published" when="1954-05-01">1954-05-01</date><biblScope unit="volume">136</biblScope><biblScope unit="issue">2-3</biblScope><biblScope unit="page" from="107">107</biblScope><biblScope unit="page" to="120">120</biblScope></imprint><idno type="ISSN">0368-6590</idno></series><idno type="istex">A3AAB9FC914BC0C09FD6F2676E1BF7B3AC960D1D</idno><idno type="DOI">10.1007/BF01519814</idno><idno type="ArticleID">Art7</idno><idno type="ArticleID">BF01519814</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0368-6590</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Summary: The experiments carried out with a variety of pure surface active agents, employed in flotation of ores as either collectors or frothers, show that (a) long chain homologues of alcohols and alkyl sulphates react strongly with xanthates at the air/liquid interface (Langmuir-trough experiments), (b) the molecular interactions between frothers and collectors occur at the solid/liquid interface — if the solid is suitably coated by collector molecules (frother adsorption tests), (c) the effects of molecular associations collector-frother are evident in frothing and flotation results. The measurements of air/water/solid and oil/water/solid contact angles (carried out under variable conditions as regards concentration of the surface active agents, pH, time of conditioning and presence of complexing agents in the oil phase) reveal the importance of the density of collector-coverage. The results have been applied to the stability and to the inversion of phase-continuity of oil/water emulsions stabilized by solid powders. A mechanism for attachment of suitably collectorcoated particles to an air bubble is postulated.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Angleterre de l'Est</li></region><settlement><li>Cambridge</li></settlement><orgName><li>Université de Cambridge</li></orgName></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Schulman, H" sort="Schulman, H" uniqKey="Schulman H" first="H." last="Schulman">H. Schulman</name></region><name sortKey="Leja, J" sort="Leja, J" uniqKey="Leja J" first="J." last="Leja">J. Leja</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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