ISSN:0037-2366    

DOI:10.1080/00372367408055590

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

Permeabilities are transfer coefficients in flow of fluids through membranes. In the case of gaseous diffusion there is normally very little, if any, interaction of the permeating components. Thus the separation of gas or vapor mixtures by means of membranes can easily be predicted when appropriate transfer coefficients of the pure components are known. The utility of a comprehensive collection of such permeabilities is therefore self-evident.

ISSN:0037-2366    

DOI:10.1080/00372367408055591

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The response of laminated membranes to permeation was investigated using simple permeation equations. The intrinsic permeability constant of the membrane was shown to be between the maximum or minimum intrinsic permeability constant of all component membranes. Thus the separation factor of the laminated membrane for any type of permeating molecules will be between the values of maximum and minimum separation factors of the component membranes. Permeation through the laminated membrane for a given species will depend on the direction of permeation if the intrinsic permeability constant of any permeating molecule is dependent on the concentration. A simple example for the concentration dependence of permeability constant shows the limits of anisotropic flow ratio.

ISSN:0037-2366    

DOI:10.1080/00372367408055592

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The chromatographic behavior of copper(II) chelates differing in the arrangement of their alkyl chains is influenced by the steric hindrance at the copper(II) site. This hindrance prevents the solvent molecules from coordinating on the remaining coordination positions, and thus RFvalues of chelates decrease with increasing compression at the copper(II) site.

ISSN:0037-2366    

DOI:10.1080/00372367408055593

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

It is hoped that the following papers will interest and stimulate all scientists. If this symposium caused some workers to try a separation method previously not used by them, then we have accomplished at least part of our goals.

ISSN:0037-2366    

DOI:10.1080/00372367408055594

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

Selection criteria are reviewed for choosing the most promising methods of separation for accomplishing a given separation of chemical components. The degree of separation attainable is governed by the separation factor, which in turn is related to molecular or ionic properties. Various separation processes are contrasted with regard to general desirablilty of using them, both on an industrial scale and on a laboratory scale. Heuristic rules for synthesizing sequences of separations to create multiple products are also considered. Criteria which have proven useful for generating separation sequences on an industrial processing scale are contrasted with those which may be useful for choosing sequences of separation steps in the laboratory.

ISSN:0037-2366    

DOI:10.1080/00372367408055595

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The removal of phenol and other weakly ionized acids and bases from waste water is described when using the liquid membrane emulsion technique. Mathematical relationships are derived for the theoretical distribution and for the rate of permeation of phenol into the emulsion.

ISSN:0037-2366    

DOI:10.1080/00372367408055596

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The plasma Chromatograph is evaluated as a separation and identification device using binary mixtures of ketones. Discrimination of components is not encouraging and the ion-molecule spectra of a mixtu not always the sum of the spectra of the individual components.

ISSN:0037-2366    

DOI:10.1080/00372367408055597

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

Recent advances in clathrate chemistry and their use for analytical and preparative chemistry are discussed. The effect of molecular geometry and sub-stituent groups of guest species on the capabilities of various clathrating compounds is reviewed.

ISSN:0037-2366    

DOI:10.1080/00372367408055598

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The use of some chemically modified graphites for separation is described. Chemically bonded sulfonic acid groups can apparently be added by the use of fuming sulfuric acid.

ISSN:0037-2366    

DOI:10.1080/00372367408055599

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor