ISSN:0021-8871    

DOI:10.1002/jctb.5010130809

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY

摘要:

AbstractA vacuum still for lithium has been constructed and operated. Analysis of lithium before and after distillation shows a reduction of concentration of most elements except oxygen; however, the available methods of analysis for oxygen are not considered reliable. Precise details of operations and difficulties with the present design are included.It is concluded from the present work, and that of others, that purification of lithium to nuclear reactor standards is feasible.

ISSN:0021-8871    

DOI:10.1002/jctb.5010130801

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY

摘要:

AbstractProperties of the emulsion formed between crude 2, 4‐dinitrotoluene (DNT) and spent acid are determined and several methods developed for the complete de‐emulsification are described. Some consideration is given to the selection of the method with respect to cost and the control of operat

ISSN:0021-8871    

DOI:10.1002/jctb.5010130802

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY

摘要:

AbstractN‐Alkyl quaternary ammonium compounds inhibit the acid corrosion of steel, the effectiveness increasing regularly with alkyl chain length between 4 and 16 carbon atoms. The inhibition obtained with the longer chain compounds shows considerable persistence after treated samples are transferred to a pure acid bath.Steel samples in these inhibitor solutions give more positive potentials than in pure acid, indicating that they are mainly anodic inhibitors.No inhibition is obtained in neutral solutions or against atmospheric corrosio

ISSN:0021-8871    

DOI:10.1002/jctb.5010130803

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY

摘要:

AbstractThe effect of a miscible solvent on the formation of monomolecular and bimolecular reduction products is discussed. Evidence is presented to support a solubility phenomenon.

ISSN:0021-8871    

DOI:10.1002/jctb.5010130804

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY

摘要:

AbstractSamples of titania gels were prepared by the hydrolysis with steam of titanium chloro‐alkoxides and titanium tetrachloride, and their surface characteristics studied by the adsorption of nitrogen at low temperatures. All the gels were active, but they exhibited a wide range of pore sizes and surface areas. The gels were stable, but the freshly prepared samples when refluxed with water underwent an unusual form of ageing in which the surface areas and pore volumes rose considerably. Raising the pH, preferably by dialysis but also by the addition of ammonia solution, changed the surface characteristics of the gels but did not destroy their activity; after this treatment the gels aged normally under reflux, with a reduction in surface area. By comparison of these results with those obtained in Parts I and II, a scheme has been drawn up for the preparation of active titania gels with any desired pore radius in the range 10–10

ISSN:0021-8871    

DOI:10.1002/jctb.5010130805

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY

摘要:

AbstractThe study of the rates of dissolution of powders of silica (quartz, tridymite and vitreous silica) of respirable size in 0–1 M‐hydrofluoric acid has been extended to more concentrated acid, to coarser powders and over longer periods. The results have not indicated any major change with dissolution in the overall particle shapes of the powders. For quartz powders of particle diameter greater than 2 μ, however, the results suggest an anisotropic dissolution mechanism, resulting in an unusual increase in the rate of dissolution with

ISSN:0021-8871    

DOI:10.1002/jctb.5010130806

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY

摘要:

AbstractUranium peroxide hydrates have been prepared from uranyl nitrate solution and hydrogen peroxide under various conditions. The materials obtained were examined by thermogravimetry,X‐ray diffraction and infra‐red spectroscopy. The results showed that uranium peroxide hydrate exists in two different crystalline forms depending on the temperature of precipitation: UO4,4H2O at below 50°, UO4,2H2O at above 70°. The former is converted into the latter by drying in air at 100° orin vacuofor 24 h. at room tempe

ISSN:0021-8871    

DOI:10.1002/jctb.5010130807

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY

摘要:

AbstractInteraction of phosphonate esters with boron trichloride,B‐trichloroborazole and chlorosilanes is studied. The boron trichloride systems gave hard, sometimes brittle, resins; the trichloroborazole reactions gave almost quantitative yields of alkyl chloride and polyanhydrides with P‐O‐B linkages; the methylchlorosilanes yielded, in the main, softer and more soluble products than those from boron trichloride. The applicability of the products as inorganic polymers is rather dou

ISSN:0021-8871    

DOI:10.1002/jctb.5010130808

出版商:John Wiley&Sons, Ltd    

年代:1963

数据来源: WILEY