摘要:

AbstractIn the development of a pilot unit for studying reactions involving heterogeneous catalysis a nickel catalyst was selected for the initial study, and the hydrogenation of benzene in a fluidized reactor using nickel and nickel oxide supported on silica gel was investigated for the reaction C6H6+ 3 H2→ C6H12at temperatures of 150—220° for the nickel oxide study and 220–275° for nickel, pressures being 25–100 p.s.i.g. and molal ratios of hydrogen to benzene ranging from 0·5 to 3·9. The data were correlated with an equation of the form\documentclass{article}\pagestyle{empty}\begin{document}$ \[r = \frac{{k_e K_{H_2 }^3 K_B p_{H_2 }^3 p_B }}{{\left({1 + K_{H_2 } p_{H_2 } + K_B p_B } \right)^4 }} \] $\end{document}By observing how the history of the catalyst affects its activity some of the known erratic behaviour of nickel catalysts is now better understood. The reported rate equation and constants for various activity levels for nickel catalyst enable a more intelligent design of chemical reactors employing th

ISSN:0021-8871    

DOI:10.1002/jctb.5010070102

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractA relationship is derived for assessing the improvement in heat transfer in tubes, afforded by the use of packing.

ISSN:0021-8871    

DOI:10.1002/jctb.5010070103

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractThe possibility of paper‐chromatographic identification of mixtures of polycyclic aromatic hydrocarbons has been studied. In order to decrease the hydrophilic character of filter paper, it was either acetylated or impregnated with alumina, propylene glycol, Vaseline or silicone.The systems studied were: anthracene and methylated anthracenes; fluorene and methylated fluorenes; phenanthrene, fluorene and anthracene; mixtures of tricyclic and of polycyclic hydrocarbons (found in the ‘chrysene fraction’). Some success was achieved with separations in these sy

ISSN:0021-8871    

DOI:10.1002/jctb.5010070104

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractThis report gives an account of the application of gas‐liquid chromatographic methods to the general work of a plastics analytical laboratory. Particular attention is paid to the examination of monomers, of depolymerization products obtained from polymers, and of adhesives. The use of dinonyl sebacate as the stationary liquid phase in a particular problem involving the determination of small amounts of methylcyclohexane in light petroleum (boiling range 60–80°) is descr

ISSN:0021-8871    

DOI:10.1002/jctb.5010070105

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractDispersions obtained by the successive addition of the tar resins, C2and C1fractions obtained from coal tar pitch to the tar oils were studied. It is shown that there is no marked difference in the effects of the various components on the thermal susceptibility of the dispersions. The temperature susceptibility of road tar cannot therefore be modified only by changing its composition.The work provides support for the concept of the colloidal nature of coal tar pitch and indicates that the tar micelle is built up on a C2core enveloped by tar resin and tar oil layers.

ISSN:0021-8871    

DOI:10.1002/jctb.5010070106

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractTernary liquid‐liquid equilibrium data at 20° are reported for the systems α‐picoline‐water‐hydrocarbon, and α‐picoline‐triethylene glycol‐hydrocarbon, where the hydrocarbons are benzene, ‘heptane’,diisobutylene a

ISSN:0021-8871    

DOI:10.1002/jctb.5010070107

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractA simple device is described for easy transfer of a sample to the column of adsorbent used for gas chromatography.

ISSN:0021-8871    

DOI:10.1002/jctb.5010070108

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010070109

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractA study is made of the kinetics of the refining of sugar solutions with bone charcoal, especially as regards the effect of particle size of the charcoal and the settled volume time, colour density and ash content of the liquor. The nature of the inorganic ions present has an appreciable effect on the volume of liquor that can be decolorized by a definite volume of char. The relation of the results of laboratory‐scale experiments to those in refining practice is briefly discusse

ISSN:0021-8871    

DOI:10.1002/jctb.5010070110

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010070101

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY