ISSN:0021-8871    

DOI:10.1002/jctb.5010101011

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractAdditional properties and details of preparation of triallylphosphine oxide are reported.

ISSN:0021-8871    

DOI:10.1002/jctb.5010101002

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractSodium stannate hydrolyses completely in 87% w/w concentrated hydrogen peroxide solution to form a stable lyophobic sol of stannic acid. Precipitation of this sol results by a reduction in the concentration of the potential determining ion (OH−or O2H−) or by the electrostatic adsorption of small quantities of polyvalent cations, e.g., Al3+. In the presence of colloidal stannic acid the hydrolysis equilibrium of this ion is automatically displaced towards the formation of a stable AlOH3+ion which, by adsorption, neutralises negative charges on the colloid. Adsorption of aluminium ions is the critical factor governing the stability of stannic acid sols in concentrated hydrogen peroxide solution stored in aluminium tanks. Protection of the sol is afforded by orthophosphate and pyrophosphate ions which are adsorbed and increase its tolerance for aluminium. Pyrophosphate, in addition, provides an alternative sink for aluminium ions which are precipitated as aluminium pyrophosphate, AlHP

ISSN:0021-8871    

DOI:10.1002/jctb.5010101003

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractSodium stannate stabilises commercial hydrogen peroxide by virtue of the stannic acid colloid formed on hydrolysis. The mechanism by which the sols are precipitated by aluminium ions, reported in Part I, explains the process by which sodium stannate stabilises commercial hydrogen peroxide against decomposition catalysts such as the polyvalent ions, Fe3+, Cr3+and Cu2+. The hydrolysis equilibria of these ions are automatically adjusted to the formation of the stable FeOH2+, CrO+and CuOH+ions, respectively, which are strongly adsorbed on the stannic acid colloid and thereby deactivated. These catalytic ions may only be present in minute amounts in non‐stabilised commercial hydrogen peroxide (pH ∼ 4·5), mostly in the heterogeneous state. The equilibrium between the heterogeneous and homogeneous phase is disturbed sufficiently to permit the formation of ionic species which are subsequently deactivated by this pro

ISSN:0021-8871    

DOI:10.1002/jctb.5010101004

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractThe concentration of a dilute copper sulphate solution by means of a partially miscible alcohol (4 or 5 C) using sodium chloride as dehydrating agent is presented as a practical example of water transfer. Equilibrium data in the several ternary systems are presented, and operating conditions for attaining a specified degree of concentration are determined by simple graphical techniques, and verified by experiment.

ISSN:0021-8871    

DOI:10.1002/jctb.5010101005

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractExamination has been made of alumina trihydrates (hydrargillite and bayerite) after being heated with water in an autoclave. In both cases the monohydrate (boehmite) is formed after 2 h. at 200°, the rate of conversion being higher for bayerite than for hydrargillite. Determination of alkali and alumina dissolved in the water during hydrothermal treatment led to the conclusion that the reaction is due to the decomposition of the trihydrate in presence of water rather than its dissolution

ISSN:0021-8871    

DOI:10.1002/jctb.5010101006

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractAn examination has been made of the inhibitive properties of the hydroxides of sodium, calcium, barium, zinc and lead and a range of salts of benzoic, cinnamic, α‐naphthoic, acetic, butyric and chloric acids.The lowest concentration (× 10−4N) at which corrosion was inhibited at pH 6·5–7·0 was for the chlorates, 50; hydroxides, benzoates and acetates, 10–20; cinnamates, ‐α‐náphthoates and butyrates 5–10. Inhibition was almost unaffected by the nature of the cation.At pH 4·5–4·9 the lead salts only were inhibitive. Consequently the earlier conclusion regarding the efficiency of the lead salts of long chain fatty acids has been extended to a nu

ISSN:0021-8871    

DOI:10.1002/jctb.5010101007

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractThe inhibitive properties of the sodium, calcium and lead salts of caproic, oenanthic, caprylic, pelargonic, capric, suberic, azelaic and sebacic acids have been examined in the pH range 4·0–6·0 at concentrations 10−5to 10−2N.The inhibitive efficiency increased with the length of the carbon chain up to a maximum at 8–9 carbon atoms. For a given acid the lead salt was more efficient than either the sodium or the calcium salt. The most inhibitive salts examined were lead suberate an

ISSN:0021-8871    

DOI:10.1002/jctb.5010101008

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractThe estimation, by paper chromatography and solvent extraction, of the different types of nitrosylruthenium complex present in solutions of irradiated uranium is described. The ruthenium in certain ‘dissolver solutions’ has been found to occur in approximately equal proportions of (RuNO) nitrato (non‐nitro) and (RuNO) nitro complexes. The value of the ruthenium decontamination factor observed in the first extractor of the chemical separation plant at Windscale, to which these ‘dissolver solutions’ are fed, is consistent with this co

ISSN:0021-8871    

DOI:10.1002/jctb.5010101009

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractThe specific heat,Cp, of a number of amorphous thermosetting polymers has been determined over the temperature range 30–160° by means of an adiabatic calorimeter. Epoxide, polyester, polyamide‐epoxide and diallyl phthalate polymers in many cases exhibit abrupt increases in the observed specific heat due to a glass transition within the polymer. In general, thermosetting polymers have higher transition temperatures than have linear polymers. The results are discussed in terms of the overall structure of the poly

ISSN:0021-8871    

DOI:10.1002/jctb.5010101010

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY