摘要:

AbstractThe preparation of new soaps of the typical and sub‐group B metals with erucic and petroselinic acids and theirtrans‐isomers is described. The properties of these soaps have been investigated with particular reference to their effect on the rate of autoxidation of pure monoethenoid fatty ac

ISSN:0021-8871    

DOI:10.1002/jctb.5010050601

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe main products of the vapour‐phase oxidation of phenanthrene are phthalic anhydride, 2‐hydroxydiphenyl‐2′‐carboxylic acid lactone and 1 : 2‐naphthalic anhydride. Conditions may be varied to give the optimum yield of a particular product, which is at least 56% for phthalic anhydride or 45% for the lactone. Smaller quantities of other compounds have been isolated which provide evidence of the course of the oxidation. A feature of the laboratory‐scale process described is the use of a fluidized catalyst, namely vanadium pentoxide on a silica support with and without potas

ISSN:0021-8871    

DOI:10.1002/jctb.5010050602

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractFollowing previous studies of the corrosion of cooled steel probes by flue gases containing SO2and SO3, further experiments have shown that: (a) for tests up to 24 hours there is a reduction in the rate of corrosion after 8 hours, (b) in the presence of corrosion products the corrosion continues even when the metal temperature is raised to or above the acid dewpoint temperature. A mechanism is briefly discussed.

ISSN:0021-8871    

DOI:10.1002/jctb.5010050603

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe vapour‐liquid equilibrium for the system ethyl methyl ketone‐carbon tetrachloride has been investigated under both isobaric and isothermal conditions by using a modified equilibrium still. At 760 mm. pressure the azeotrope was found to contain 66.2 mole‐% carbon tetrachloride, boiling at 73.7°, rising to 71.0 mole‐% at 342 mm. pressure and 50°.Both sets of data were shown to be thermodynamically consistent using the method of Redlich&Kister. The excess free energies of the system at 50° and 760 mm. have been calculated by using the vapour‐liquid equi

ISSN:0021-8871    

DOI:10.1002/jctb.5010050604

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractWhen a phosphor screen is laid by sedimentation in a solution of weak potassium silicate mixed with a salt additive, gelatinous silica is deposited at the powder‐glass interface and the adhesion depends on this rather than on the electrostatic forces. In order to measure this adhesive force and its increase with time before decanting off the supernatant liquid an underwater jet test has been devised. The method for calibration of the jet in absolute units is described and the influences of various mechanical factors are reviewed. With this test the course of setting in typical phosphor screens has been quantitatively followed, and it has been shown that the important solution factors are the ratio of the concentration of cation to the SiO2content of the solution, and the cationic charge. More powerful jets have been used to study the kinetics with screens of greater adhesion.In an attempt to explain the anomalous adhesion experienced with phosphors of different particle size, a study has been made of the variation of the adhesion index with particle size by using specially prepared homodisperse fractions.A brief study has been made of the factors concerned with adhesion after drying in order to throw further light on the gelation reaction.Finally a critical discussion and review of the literature is given to compare the interfacial gelation reaction with the much studied bulk reaction. It is concluded that owing to the very high silica concentration in the interface the reaction is probably limited by a diffusion mechanis

ISSN:0021-8871    

DOI:10.1002/jctb.5010050605

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010050606

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY