摘要:

AbstractDehydration of the carbinol 1,1‐diphenyl‐2,2‐dimethylpropan‐1‐ol gives a hydrocarbon C17H18which was identified as 2‐methyl‐3,3‐diphenylbut‐1‐ene.Oxidation of C17H18with chromium trioxide in acetic anhydride gave acetone, acetophenone, benzophenone and α‐methyl‐β,β‐diphenylbutyric acid. Oxidation with chromium trioxide in aqueous sulphuric acid gave acetone, acetophenone, benzophenone and diphenylmethylacetic acid.A tentative explanation for the production of abnormal fission products and α‐methyl‐

ISSN:0375-9210    

DOI:10.1002/jctb.5020210401

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractValues of the solubilities of hydrogen chloride in 21 ethers over the range ‐ 75°to + 30°c at 1 atm are given. It has been found that solubilities are controlled by both inductive and steric factors. Vapour pressures of hydrogen chloride in methyl and ethyl n‐butyl ethers have been measured, and these results have been used to calculate differential heats of solution. Preliminary results are given for infra‐red shifts of ether‐hydrogen chloride

ISSN:0375-9210    

DOI:10.1002/jctb.5020210402

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractA major cause of vacuum discoloration of some anatase titanium dioxide powders at 5 × 10−2torr has been identified as contamination by rotary pump oil. The discoloration is stable in dry air but fades on exposure to moist a

ISSN:0375-9210    

DOI:10.1002/jctb.5020210403

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractThe conditions of formation of the barium aluminate hydrates have been reinvestigated, and new compounds in this system are reported. Preparative methods used included reaction of barium hydroxide solutions with aluminium wire and with various forms of hydrated alumina and also reactions of mixtures under hydrothermal conditions. The methods used for the investigation and characterisation of the products are described.

ISSN:0375-9210    

DOI:10.1002/jctb.5020210404

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractThe compound of approximate formula BaO.Al2O3.H2O has been synthesised. Infra‐red and X‐ray studies suggest a structure based on a framework of AlO4tetrahedra. Thermal dehydration and differential thermal analysis curves are presented, and are explained in terms of the suggested struct

ISSN:0375-9210    

DOI:10.1002/jctb.5020210405

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractTwo compounds of formula BaO.Al2O3.2H2O have been synthesised and studied by infra‐red, X‐ray and thermal analytical techniques. One form yielded another crystalline product, BaO.Al2O3.0.5H2O, as an intermediate during dehydration. The results are interpreted in terms of the known crystal structure of one of the forms of the dihydr

ISSN:0375-9210    

DOI:10.1002/jctb.5020210406

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractThe kinetics of the isothermal dehydration of the clay minerals, montmorillonite and illite, were studied in vacuo as well as in the presence of a constant water vapour pressure. The dehydration followed a first‐order law, and the presence of water vapour led to (i) an increase in the extent of dehydration, compared with that in vacuo; (ii) a retardation to the rate of dehydration; and (iii) a great increase in the energy of activation required for the dehydration.Dehydration in vacuo appears to be diffusion‐controlled with an activation energy of 2–4 kcal/mole, whereas the desorption of water appears to control dehydration in the presence of water vapour, with an activation energy of 12–15 kcal/mole. The results are discussed in conjunction with the mechanical contraction of the layer structure, and the introduction of diffusion barriers when dehydration in vacuo take

ISSN:0375-9210    

DOI:10.1002/jctb.5020210407

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

摘要:

AbstractOperating conditions were investigated for a packed‐bed membrane cell for electro‐deionisation of brackish or tap water to give high‐purity water with electrical conductivity of the order 0.1 μmho/cm. Flow rates of 10–40 h−1, current densities of 0.5–5 mA/cm2, and incoming solution concentrations of up to 0.01 N were used. It was shown that strongly acidic cation‐exchange resin plus strongly basic anionexchange resin in volume ratio 1:1 was the most effective, and that particle size needed to be 60–80 mesh and resin bed thickness 3 mm for optimum current efficiency in purifying water to the r

ISSN:0375-9210    

DOI:10.1002/jctb.5020210408

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY

ISSN:0375-9210    

DOI:10.1002/jctb.5020210409

出版商:John Wiley&Sons, Ltd    

年代:1971

数据来源: WILEY