Zobrazeno 1 - 10 of 129 pro vyhledávání: '"J. H. Purnell"'
1
The influence of hydrophilic colloids on the miscibility of phenol and water
Autor: J. H. Purnell, S. T. Bowden
Publikováno v: Journal of Applied Chemistry. 4:648-653
The influence of certain hydrophilic materials on the miscibility of phenol and water is examined. The critical solution temperature (C.S.T.) is lowered by sodium stearate and tannin, and raised by colophony, starch, agar and gelatin. For stearate an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75cec792dd532eec576c8e1feeb4adc8
https://doi.org/10.1002/jctb.5010041202
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2
The behaviour of katharometers for gas chromato-graphy in carrier gases of low thermal conductivity
Autor: J. Bohemen, J. H. Purnell
Publikováno v: Journal of Applied Chemistry. 8:433-440
The performance of hot-wire thermal conductivity cells has been studied, particular attention being paid to the phenomena of partial and complete reversal of chromatographic peaks. Forced convection has been found to be an important factor in katharo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1a1f8447bafb1d318faf5303869476bc
https://doi.org/10.1002/jctb.5010080706
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3
Determination of liquid-liquid partition data for hydrazoic acid between tributylphosphate-alkane/nitric acid solutions using gas-liquid chromatography
Autor: J. H. Purnell, Kenneth G. Furton, G. Stedman
Publikováno v: Journal of Radioanalytical and Nuclear Chemistry. 242:663-669
The gas chromatographic technique of elution by characteristic point (ECP) has been used to determine partition data for HN3 at finite concentrations with tributyl phosphate (TBP) in hydrocarbon (hexadecane) solution in the presence of nitric acid an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f8cee6af710e09a5aaffbf91e642f366
https://doi.org/10.1007/bf02347377
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4
The catalytic dehydration of pentan-1-ol by alumina pillared Texas montmorillonites of differing pillar density
Autor: J. H. Purnell, J. R. Jones
Publikováno v: Catalysis Letters. 28:283-289
Controlled calcination of Texas montmorillonite provides a family of materials differing only in cation exchange capacity (cec). Introduction of alumina pillar precursor ions, followed by calcination at 500°C, then provides a family of pillar densit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35924de67f878cf5b34094be5c3c7edf
https://doi.org/10.1007/bf00806058
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5
Synthesis and characterisation of alumina pillared Texas montmorillonite and determination of the effective Keggin ion charge
Autor: J. H. Purnell, J. R. Jones
Publikováno v: Catalysis Letters. 18:137-140
Controlled calcination of Texas montmorillonite has allowed production of a range of materials of cation exchange capacity from ≈ 70 mequiv./100 g dry clay to virtually zero. Pillaring of these with Chlorhydrol precursor solution has then provided
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::761344dfeb980641935729617fab10eb
https://doi.org/10.1007/bf00769506
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6
Ionic migration and charge reduction in Ni2+-, Co2+- and Zn2+-exchanged Texas montmorillonite
Autor: Lu Yun, J. H. Purnell
Publikováno v: Catalysis Letters. 18:235-241
Controlled calcination of ion-exchanged Texas montmorillonite leads to layer charge reduction. Detailed chemical analyses of both exchangeable and unexchangeable metal species lead to the conclusion that, in complete contrast to the situation with Wy
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c83d873764b4832720c8e86c7c5aa30e
https://doi.org/10.1007/bf00769442
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7
Charge reduction and regeneration in K+, Na+, Mg2+, Ni2+ and Co2+-exchanged Wyoming Bentonite
Autor: J. H. Purnell, Lu Yun, J. Williams
Publikováno v: Catalysis Letters. 10:63-69
Controlled calcination of ion-exchanged Wyoming Bentonite in the presence and absence of ammonia leads to layer charge reductions. Detailed chemical analyses of both unexchangeable and exchangeable species lead to the conclusion that in no case is th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3aecbc129c5fb3acb478dab9820c4ae1
https://doi.org/10.1007/bf00764737
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8
The mechanism of layer charge reduction and regeneration in Li+-exchanged montmorillonite
Autor: J. Williams, James A. Ballantine, J. H. Purnell
Publikováno v: Catalysis Letters. 9:115-119
Thermally induced migration of Li+-cations from the interlamellar region into the sheet structure of montmorillonite clays has long been known to lead to charge reduction which, depending on conditions, may be partial or virtually complete. Charge re
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75f973f5fd498a07789faaa91c933edd
https://doi.org/10.1007/bf00769089
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10
Catalysis by ion-exchanged montmorillonites
Autor: J. H. Purnell
Publikováno v: Catalysis Letters. 5:203-210
In this short review the special attributes that make modified layered clays such versatile and effective catalysts for the conversions of organic molecules are discussed and exemplified.
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https://doi.org/10.1007/bf00763954
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