James S Falcone, Jr. | West Chester University of PA (original) (raw)
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Papers by James S Falcone, Jr.
Chemischer Informationsdienst, Mar 8, 1983
Analytical Chemistry, Nov 1, 1974
Acs Symposium Series, Jun 1, 1982
Surfactant Science Series, 2006
Analytical Chemistry, 1975
Earlier investigations have shown that the addition of either methanol or N-methylproplonamlde (N... more Earlier investigations have shown that the addition of either methanol or N-methylproplonamlde (NMP) to an aqueous solution of tris(hydroxymethy1)aminomethane (Tris) decreases the pK of Tris-HC lnitlally, after which pK reaches a minimum and rises to values in pure methanol and NMP that exceed those in pure water. Qualitatively, the course of the pK curve is similar in the two binary solvent systems despite the fact that MeOH decreases the dielectric constant while NMP raises it. Solubility and emf methods have now been used to determine the individual transfer energies of Tris, Tris-hydrochloride, and HCI between water and NMP-MeOH mixtures (dielectric constants from 32.6 to 176) and to derive the pK at 25 OC from them. Again It is found that the pK passes through a minimum when the mole fraction of NMP in the mixture is about 0.4. The pK in binary mixtures of the three solvents H20, MeOH, and NMP is discussed in terms of preferential solvation.
The Journal of Physical Chemistry, Aug 1, 1973
Journal of Solution Chemistry, 1974
Journal of Solution Chemistry, 1974
The enthalpy of dilution of tetra-n-butylammonium bromide in mixtures of water and N-methylaeetam... more The enthalpy of dilution of tetra-n-butylammonium bromide in mixtures of water and N-methylaeetamide has been measured from approximately 0.1 to 1.0 m at 35~ The mole fraction of water in the solvent varied from 0.250 to 0.969. The results are strikingly nonlinear in the mole fraction of water. As the mole fraction of water varies from 0 to 0.7, there is only a small change in the enthalpy of dilution. At higher mole fractions of water, the excess enthalpy rises sharply to the unusually high values found in water. This indicates that the unusually high values of excess enthalpy associated w#h hydrophobie bonding in water are destroyed by relatively small amounts of N-methylaeetamide.
Journal of Solution Chemistry, 1974
The enthalpies of dilution of some alkali and tetraalkylammonium halides have been measured in N-... more The enthalpies of dilution of some alkali and tetraalkylammonium halides have been measured in N-methylaeetamide at 35~ The results approach the Debye-Hiickel limiting law at low concentrations. Excess free energies and entropies were calculated from the pr'esent results and previous freezing point measurements. The excess enthalpies of the alkali halides in N-methylaeetamide are in the same range as the excess enthalpies in water. The effect of changing anions is quite small in N-methylacetamide. The cation order is Li + ~_ Na + > Cs + > K +. The excess enthalpies of the tetraalkylammonium halides in N-methylacetamide are very different from the excess enthalpies in water, confirming the conclusion that in water the large excess enthalpies are due to hydrophobic bonding and that in N-methylaeetamide this effect is not present. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission of the publisher.
Industrial Engineering Chemistry Research, 2010
ABSTRACT A procedure that measures both the silica concentration and the ratio of silica to alkal... more ABSTRACT A procedure that measures both the silica concentration and the ratio of silica to alkali content of the commercially important sodium silicate solutions using an ATR FT-IR spectrophotomer has been developed. The accuracy and precision have been found to be equal to or better than the commonly used measures via titrimetry and density determination.
Preprints American Chemical Society Division of Petroleum Chemistry, 1984
Society of Petroleum Engineers Journal, 1982
Page 1. Surfactant Flooding 2*: The Effect of Alkaline Additives on Permeability and Sweep Effici... more Page 1. Surfactant Flooding 2*: The Effect of Alkaline Additives on Permeability and Sweep Efficiency Paul H. Krumrine, SPE, The PQ Сотр ... caused by lower IFT values,9 and maintenance of rock water wettabilityl0 or prevention of surfactant sorption that could cause rever-sal to ...
Surfactant Science Series, 2006
ABSTRACT The uses of soluble silica are reviewed in a concise manner. Ideas originally summarized... more ABSTRACT The uses of soluble silica are reviewed in a concise manner. Ideas originally summarized by Ralph K. Iler are expanded and discussed with up-to-date references. Key technological factors associated with the application of soluble silica in the broad categories are described. The categories are: Adhesives, binders, and deflocculants; Cleaners and detergents; and Raw materials. These technological factors are related to current understanding of the chemical properties of these complex inorganic polymer solutions.
Advances in Chemistry, 1994
ABSTRACT The uses of soluble silica are reviewed in a concise manner. Ideas originally summarized... more ABSTRACT The uses of soluble silica are reviewed in a concise manner. Ideas originally summarized by Ralph K. Iler are expanded and discussed with up-to-date references. Key technological factors associated with the application of soluble silica in the broad categories are described. The categories are: Adhesives, binders, and deflocculants; Cleaners and detergents; and Raw materials. These technological factors are related to current understanding of the chemical properties of these complex inorganic polymer solutions.
Surfactant Science Series, 2006
Chemischer Informationsdienst, Mar 8, 1983
Analytical Chemistry, Nov 1, 1974
Acs Symposium Series, Jun 1, 1982
Surfactant Science Series, 2006
Analytical Chemistry, 1975
Earlier investigations have shown that the addition of either methanol or N-methylproplonamlde (N... more Earlier investigations have shown that the addition of either methanol or N-methylproplonamlde (NMP) to an aqueous solution of tris(hydroxymethy1)aminomethane (Tris) decreases the pK of Tris-HC lnitlally, after which pK reaches a minimum and rises to values in pure methanol and NMP that exceed those in pure water. Qualitatively, the course of the pK curve is similar in the two binary solvent systems despite the fact that MeOH decreases the dielectric constant while NMP raises it. Solubility and emf methods have now been used to determine the individual transfer energies of Tris, Tris-hydrochloride, and HCI between water and NMP-MeOH mixtures (dielectric constants from 32.6 to 176) and to derive the pK at 25 OC from them. Again It is found that the pK passes through a minimum when the mole fraction of NMP in the mixture is about 0.4. The pK in binary mixtures of the three solvents H20, MeOH, and NMP is discussed in terms of preferential solvation.
The Journal of Physical Chemistry, Aug 1, 1973
Journal of Solution Chemistry, 1974
Journal of Solution Chemistry, 1974
The enthalpy of dilution of tetra-n-butylammonium bromide in mixtures of water and N-methylaeetam... more The enthalpy of dilution of tetra-n-butylammonium bromide in mixtures of water and N-methylaeetamide has been measured from approximately 0.1 to 1.0 m at 35~ The mole fraction of water in the solvent varied from 0.250 to 0.969. The results are strikingly nonlinear in the mole fraction of water. As the mole fraction of water varies from 0 to 0.7, there is only a small change in the enthalpy of dilution. At higher mole fractions of water, the excess enthalpy rises sharply to the unusually high values found in water. This indicates that the unusually high values of excess enthalpy associated w#h hydrophobie bonding in water are destroyed by relatively small amounts of N-methylaeetamide.
Journal of Solution Chemistry, 1974
The enthalpies of dilution of some alkali and tetraalkylammonium halides have been measured in N-... more The enthalpies of dilution of some alkali and tetraalkylammonium halides have been measured in N-methylaeetamide at 35~ The results approach the Debye-Hiickel limiting law at low concentrations. Excess free energies and entropies were calculated from the pr'esent results and previous freezing point measurements. The excess enthalpies of the alkali halides in N-methylaeetamide are in the same range as the excess enthalpies in water. The effect of changing anions is quite small in N-methylacetamide. The cation order is Li + ~_ Na + > Cs + > K +. The excess enthalpies of the tetraalkylammonium halides in N-methylacetamide are very different from the excess enthalpies in water, confirming the conclusion that in water the large excess enthalpies are due to hydrophobic bonding and that in N-methylaeetamide this effect is not present. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission of the publisher.
Industrial Engineering Chemistry Research, 2010
ABSTRACT A procedure that measures both the silica concentration and the ratio of silica to alkal... more ABSTRACT A procedure that measures both the silica concentration and the ratio of silica to alkali content of the commercially important sodium silicate solutions using an ATR FT-IR spectrophotomer has been developed. The accuracy and precision have been found to be equal to or better than the commonly used measures via titrimetry and density determination.
Preprints American Chemical Society Division of Petroleum Chemistry, 1984
Society of Petroleum Engineers Journal, 1982
Page 1. Surfactant Flooding 2*: The Effect of Alkaline Additives on Permeability and Sweep Effici... more Page 1. Surfactant Flooding 2*: The Effect of Alkaline Additives on Permeability and Sweep Efficiency Paul H. Krumrine, SPE, The PQ Сотр ... caused by lower IFT values,9 and maintenance of rock water wettabilityl0 or prevention of surfactant sorption that could cause rever-sal to ...
Surfactant Science Series, 2006
ABSTRACT The uses of soluble silica are reviewed in a concise manner. Ideas originally summarized... more ABSTRACT The uses of soluble silica are reviewed in a concise manner. Ideas originally summarized by Ralph K. Iler are expanded and discussed with up-to-date references. Key technological factors associated with the application of soluble silica in the broad categories are described. The categories are: Adhesives, binders, and deflocculants; Cleaners and detergents; and Raw materials. These technological factors are related to current understanding of the chemical properties of these complex inorganic polymer solutions.
Advances in Chemistry, 1994
ABSTRACT The uses of soluble silica are reviewed in a concise manner. Ideas originally summarized... more ABSTRACT The uses of soluble silica are reviewed in a concise manner. Ideas originally summarized by Ralph K. Iler are expanded and discussed with up-to-date references. Key technological factors associated with the application of soluble silica in the broad categories are described. The categories are: Adhesives, binders, and deflocculants; Cleaners and detergents; and Raw materials. These technological factors are related to current understanding of the chemical properties of these complex inorganic polymer solutions.
Surfactant Science Series, 2006