摘要:

AbstractThe peeling strength of an aluminium foil glued to a glass plate with ‘adhesionable’ polyethylene was lowered by incorporating oleic acid into polyethylene. The average thickness τ of the organic film remaining on the aluminium after peeling was a few microns for pure polyethylene, near 20 μ for a mixture of polyethylene 99.6 and oleic acid 0.4 parts, and very small (for instance, 0.5 μ) for a mixture of polyethylene 97 and oleic acid 3 parts. In grossly contaminated polyethylenes, rupture occurred in a weak boundary layer and τ depended on location and extent of these

ISSN:0021-8871    

DOI:10.1002/jctb.5010110301

出版商:John Wiley&Sons, Ltd    

年代:1961

数据来源: WILEY

摘要:

AbstractA qualitative method by paper chromatography is described for distinguishing between vapour phase and liquid phase gums found in gas plant and appliances. Details are also given of attempts to determine vapour and liquid phase gums qualitatively, in admixtures with various types of tar by paper chromatography.

ISSN:0021-8871    

DOI:10.1002/jctb.5010110302

出版商:John Wiley&Sons, Ltd    

年代:1961

数据来源: WILEY

摘要:

AbstractSixty‐one crude tars representing the normal primary distillation feedstocks of almost all tar‐distilling firms in the United Kingdom have been subjected to a method of assay and a number of the properties of (a) the tar after dehydration and (b) the pitch and oils obtained from the tar by a standard distillation have been determined. The results have been examined statistically to find the degree of correlation between the various properties. A characterisation index based on the level of three of the most readily determined properties, viz. the specific gravity of the dry tar, the phenol content of the oils distilling to 250° and the benzene‐insoluble content of the dry tar, is pr

ISSN:0021-8871    

DOI:10.1002/jctb.5010110303

出版商:John Wiley&Sons, Ltd    

年代:1961

数据来源: WILEY

摘要:

AbstractA survey of the occurrence of the mucosubstances reported in the first two papers of this series1,2is reported. Certain modifications of the isolation techniques necessary for use with high‐grade gelatins and glues are describe

ISSN:0021-8871    

DOI:10.1002/jctb.5010110304

出版商:John Wiley&Sons, Ltd    

年代:1961

数据来源: WILEY

摘要:

AbstractA study is made of three processes for the separation of thorium from uranium and rare‐earth elements in crude thorium nitrate solutions prepared by breakdown of monazite sand. Uranium may be separated from thorium and rare‐earth elements in a preliminary extraction with 5% or 40% v/v tri‐n‐butyl phosphate (TBP) in xylene and the thorium separated from the rare‐earth elements in a subsequent extraction with 40% v/v TBP in xylene. Alternatively thorium and uranium may be extracted simultaneously from the solutions with 40% TBP in xylene and the thorium preferentially backwashed from the loaded solvent with dilute HNO3. The present work indicates that processes in which uranium only is extracted in the first operation will be the most flexible and the simplest to operate. The partition coefficients for zirconium, which occurs as an additional contaminant in solutions prepared from thorite ores, have also been determined by batch extraction with 5% and 40% TBP in xylene and the data confirmed in a continuous countercurre

ISSN:0021-8871    

DOI:10.1002/jctb.5010110305

出版商:John Wiley&Sons, Ltd    

年代:1961

数据来源: WILEY

摘要:

AbstractA rapid, accurate and precise gas chromatographic method for the determination of hydrogen cyanide in mixtures of the permanent gases and water vapour is described. Results are given for the hydrogen cyanide and nitrogen contents of synthetic gas mixtures of known composition. The effects of various column pre‐treatments on accuracy and precision are discussed. The apparatus is very suitable for the frequent determination of hydrogen cyanide, nitrogen, oxygen, methane and carbon monoxide in mixtures of these gase

ISSN:0021-8871    

DOI:10.1002/jctb.5010110306

出版商:John Wiley&Sons, Ltd    

年代:1961

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010110307

出版商:John Wiley&Sons, Ltd    

年代:1961

数据来源: WILEY