摘要:

Procedures are described whereby zinc and copper present as cations in seawater are brought to the surface in less than 5 min by an adsorption colloid flotation process which utilizes a negatively charged ferric hydroxide collector, a cationic surfactant, dodecylamine, and air. Statistical studies on test series show a mean recovery of 94.0% with a relative standard deviation of 6.1% for zinc and a mean recovery of 95.0% with a relative standard deviation of 6.1% for copper.

ISSN:0037-2366    

DOI:10.1080/00372367208058967

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

The effect of the sample size on the retention time is studied both experimentally and theoretically. It has already been shown that the deviation of the retention time from its value at infinite dilution is a consequence of a nonlinearity in the basic transfer relations. The previous approach is extended to systems for which the equilibrium isotherm is no longer linear. The relative deviation is either positive or negative according to the curvature of the isotherm. A good agreement between predicted and experimental values is obtained.

ISSN:0037-2366    

DOI:10.1080/00372367208058968

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

A study was made of the flotation of very dilute solutions of two cationic collectors, hexadecyltrimethylammonium chloride (HTMAC) and dodecyl-pyridinium chloride (DPC), in the presence of added electrolytes. The concentration, charge, and nature of these electrolytes were found to have a pronounced effect on the rates of flotation. The determinations were made at two different gas flow-rates; unexpectedly, the ratios of the flotation rates were found to be different to the total surface areas of the bubbles passing.

ISSN:0037-2366    

DOI:10.1080/00372367208058969

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

The extent to which hexadecyltrimethylammonium chloride is removed from 10−5Msolutions by solvent sublation into 2-octanol is compared to the extraction achieved by equilibrium distribution between the two phases. A comparison is also made between.the rates of removal by solvent sublation and by foaming, which shows the former process to be slower but to be preferable if the foams are unstable. The findings are in keeping with a mechanism of solvent sublation published previously.

ISSN:0037-2366    

DOI:10.1080/00372367208058970

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Experiments with stripping foam fractionation columns indicate that within the range of variables studied, stripping lengths of 10 to 150 cm have negligible effect on separation. These experimental results cannot be explained adequately by the transfer unit approach.

ISSN:0037-2366    

DOI:10.1080/00372367208058971

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Empirical equations with correlation coefficients greater than 0.9 for the solvent extraction of GeCl4, GeBr4, acetylacetone, trifluoroacetylacetone, thenoyltrifluoroacetone, 1-nitropropane, bis-thenoyltrifluoroacetone zinc(II), and several dicarboxylic acids in various solvents are presented.

ISSN:0037-2366    

DOI:10.1080/00372367208058972

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

This investigation was concerned with the determination of the influence of water on the distribution of several metal-8-quinolinol chelates between nitromethane and 1-decanol. These observations were utilized to describe the general equilibria involved in the extraction processes.

ISSN:0037-2366    

DOI:10.1080/00372367208058973

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0037-2366    

DOI:10.1080/00372367208058966

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor