Journal of Applied Solution Chemistry and Modeling最新文献_第2页

To the Mathematical Theory of the Temkin Adsorption Mode Temkin吸附模式的数学理论

Journal of Applied Solution Chemistry and Modeling Pub Date : 2020-04-03 DOI: 10.6000/1929-5030.2020.09.02

M. Vigdorowitsch, L. Tsygankova, P. N. Bernatsky

引用次数: 4

The Free-Radical Nonbranched-Chain Initiated Formation of Ethylene Glycol from Methanol–Formaldehyde Solutions 自由基非支链引发甲醇-甲醛溶液生成乙二醇的研究

Journal of Applied Solution Chemistry and Modeling Pub Date : 2020-02-20 DOI: 10.6000/1929-5030.2020.09.01

M. M. Silaev

{"title":"The Free-Radical Nonbranched-Chain Initiated Formation of Ethylene Glycol from Methanol–Formaldehyde Solutions","authors":"M. M. Silaev","doi":"10.6000/1929-5030.2020.09.01","DOIUrl":"https://doi.org/10.6000/1929-5030.2020.09.01","url":null,"abstract":"The mechanism and kinetics are developed for the free-radical nonbranched-chain initiated formation of ethylene glycol in methanol–formaldehyde solutions at formaldehyde concentrations of 0.1–3.1 mol dm and temperatures of 373–473 K. The experimental concentrations of the free unsolvated form of formaldehyde are given at the different temperatures and total concentrations of formaldehyde in methanol. The experimental dependence of the radiation-chemical yields of ethylene glycol on formaldehyde concentration in γ-radiolysis of methanol–formaldehyde solutions at 373–473 K is shown. At a formaldehyde concentration of 1.4 mol dm and T = 473 K, the radiation-chemical yield of ethylene glycol is 139 molecules per 100 eV. The effective activation energy of ethylene glycol formation is 25 ± 3 kJ mol. The quasi-steady-state treatment of the reaction network suggested here led to a rate equation accounting for the non-monotonic dependence of the ethylene glycol formation rate on the concentration of the free (unsolvated) form of dissolved formaldehyde. It is demonstrated that the peak in this dependence is due to the competition between methanol and CH2=O for reacting with adduct radical HOCH2CH2O.","PeriodicalId":15165,"journal":{"name":"Journal of Applied Solution Chemistry and Modeling","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87111946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How to Resolve the Problem of Drago's Four Parameters in the Context of Molecular Interactions 在分子相互作用的背景下，如何解决Drago的四个参数问题

Journal of Applied Solution Chemistry and Modeling Pub Date : 2019-10-02 DOI: 10.6000/1929-5030.2019.08.02

H. Tran, B. Michel

引用次数: 1

Modified Poly(ethylene terephthalate) Nano Fibers for Removal of Copper(II) Ions 改性聚对苯二甲酸乙酯纳米纤维去除铜(II)离子

Journal of Applied Solution Chemistry and Modeling Pub Date : 2019-09-20 DOI: 10.6000/1929-5030.2019.08.01

F. Azizinezhad

引用次数: 0

Sorption of the Simplest Carboxylic Acids on Clay-Like Mineral Glauconite: Reduction of Integral Toxicity of Aqueous Solutions 最简单羧酸在粘土状矿物海绿石上的吸附:降低水溶液的整体毒性

Journal of Applied Solution Chemistry and Modeling Pub Date : 2018-12-21 DOI: 10.6000/1929-5030.2018.07.07

L. Tsygankova, M. Vigdorowitsch, A. Uryadnikov, E. Tanygina, O. V. Alyokhina, M. Uryadnikova

{"title":"Sorption of the Simplest Carboxylic Acids on Clay-Like Mineral Glauconite: Reduction of Integral Toxicity of Aqueous Solutions","authors":"L. Tsygankova, M. Vigdorowitsch, A. Uryadnikov, E. Tanygina, O. V. Alyokhina, M. Uryadnikova","doi":"10.6000/1929-5030.2018.07.07","DOIUrl":"https://doi.org/10.6000/1929-5030.2018.07.07","url":null,"abstract":": The integral toxicity of solutions of a number of carboxylic acids was estimated by measuring their chemical oxygen consumption ( COC ) and the biochemical oxygen demand for the biodegradation of substances due to microorganisms ( BOD 5 ). The analytical dependences of COC and BOD 5 as well as of their ratio for these compounds on concentration were determined. The values of COC and BOD 5 for a number of acid solution mixtures were measured. The coefficient that indicates biodegradability of substances has been calculated. The chemical consumption of oxygen by solutions of organic acids is shown to increase with the transition from lower to higher homologues and with increase in the concentration of the solution. The kinetics and degree of removal of organic acids out of solutions due to sorption on the clay-like mineral, glauconite, have been studied. Glauconite that is the natural sorbent is characterized by a high adsorbing power in solutions of organic acids under both stationary and non-stationary conditions. However, adsorption becomes complicated as complexity of the organic acid molecule structure grows. To achieve more comprehensive removal of acids out of solutions, one reduces flow rate and increases thickness of the sorbent layer.","PeriodicalId":15165,"journal":{"name":"Journal of Applied Solution Chemistry and Modeling","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77623790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Low-Frequency Sonolysis on the Kinetics of Liquid- Phase Chemical Reactions Involving Associates 低频声溶对液相化学反应动力学的影响

Journal of Applied Solution Chemistry and Modeling Pub Date : 2018-12-15 DOI: 10.6000/1929-5030.2018.07.06

T. P. Kulagina, L. Smirnov, Z. S. Andrianova

引用次数: 0

A New Model for the Full Inclusion of Precipitation Reactions in the General Ionic Equilibrium Framework of Homogeneous Solutions Based on the Fraction of Species Concept in Heterogeneous Systems 基于非均相体系中物种分数概念的均匀溶液一般离子平衡框架中沉淀反应完全包含的新模型

Journal of Applied Solution Chemistry and Modeling Pub Date : 2018-12-13 DOI: 10.6000/1929-5030.2018.07.05

E. R. Miguel

{"title":"A New Model for the Full Inclusion of Precipitation Reactions in the General Ionic Equilibrium Framework of Homogeneous Solutions Based on the Fraction of Species Concept in Heterogeneous Systems","authors":"E. R. Miguel","doi":"10.6000/1929-5030.2018.07.05","DOIUrl":"https://doi.org/10.6000/1929-5030.2018.07.05","url":null,"abstract":"This study aims at extending the general methodology for the study of predominance and reactivity of ionic homogeneous solutions to precipitation reactions. This extension was satisfactorily formulated by the definition of the fraction of species concept in heterogeneous systems for the first time. An easy form to fully integrate the ion product concept with other descriptions of homogeneous ionic reactions, to obtain predominance zone diagrams (PDZ), to enrich the use logarithmic relative diagrams, to generate continuous equations from titration curves, and to generalize side-reaction coefficients to heterogeneous systems using easy-to-compute algorithms of calculation is shown. The new representation was applied in a study case exemplified by the hydrolysis of copper (II) in the absence and the presence of complexing ligands considering soluble and insoluble species of the metal ion. The results perfectly compare to those obtained by established numerical and graphical methods of analysis of solution equilibria showing the equivalence among the different descriptions. Pre-nucleation clusters (PNCs) theory of precipitation reactions was used as a mean to interpret the theoretical implication that this view engendered.","PeriodicalId":15165,"journal":{"name":"Journal of Applied Solution Chemistry and Modeling","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77961977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Ionic Liquids as Efficient Extractants for Quercetin from Red Onion (Allium cepa L.) 离子液体对红洋葱中槲皮素的高效萃取

Journal of Applied Solution Chemistry and Modeling Pub Date : 2018-11-08 DOI: 10.6000/1929-5030.2018.07.04

U. Domańska, A. Wiśniewska, Z. Dąbrowski, Mikołaj Więckowski

{"title":"Ionic Liquids as Efficient Extractants for Quercetin from Red Onion (Allium cepa L.)","authors":"U. Domańska, A. Wiśniewska, Z. Dąbrowski, Mikołaj Więckowski","doi":"10.6000/1929-5030.2018.07.04","DOIUrl":"https://doi.org/10.6000/1929-5030.2018.07.04","url":null,"abstract":"The solubility of Quercetin in alcohols, esters and in 1-ethyl-3-methylimidazolium trifluoroacetate, [EMIM][TFA] ionic liquid (IL) using the dynamic method was measured at constant pH in a range of temperature 233-373 K and compare to the literature data. The experimental solubility data have been correlated by means of commonly known G E models,UNIQUAC and NRTL with the assumption that the systems studied here present simple eutectic behaviour. The basic thermal properties of Quercetin, i.e., fusion temperature and the enthalpy of fusion have been measured with differential scanning microcalorimetry technique (DSC).The application of alcohols, esters and ionic liquids (ILs) as alternatives to conventional organic solvents in the liquid-liquid extraction of Quercetin from different medicinal plants, flowers and frozen red onion ( Allium cepa L .) was investigated. The parameters affecting the extraction yield using ILs such as chemical structures of the IL cation and anion, the phase volume ratio of extracting solvent, time of extraction and the Quercetin form of sample and concentration were evaluated. Specific Quercetin composition was performed through HPLC measurements. Using the most effective ILs in extraction, the 14.3±0.1g∙kg -1 and 5.9±0.1 g∙kg -1 of Quercetin from frozen pure red onion was obtained with N , N -diethyl- N -methyl- N -(2-methoxyethyl)ammonium tetrafluoroborate, [N 2,2,1,2OCH3 ][BF 4 ] and 1-ethyl-3-methylimidazolium trifluoroacetate, [EMIM][TFA], respectively.","PeriodicalId":15165,"journal":{"name":"Journal of Applied Solution Chemistry and Modeling","volume":"2 1","pages":"21-38"},"PeriodicalIF":0.0,"publicationDate":"2018-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74597445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Vapor-Liquid Equilibrium at Several Experimental Conditions of the Binary Mixtures Methyl Lactate with n-Alkanols 乳酸甲酯与正烷醇二元混合物在几种实验条件下的气液平衡

Journal of Applied Solution Chemistry and Modeling Pub Date : 2018-09-24 DOI: 10.6000/1929-5030.2018.07.03

Rubén Ezquerra, Alberto Latorre, Najla Ben Mahdoui, C. Lafuente

引用次数: 0

Solution Thermodynamics and Preferential Solvation of Atenolol in {Ethanol (1) + Water (2)} Cosolvent Mixtures 阿替洛尔在{乙醇(1)+水(2)}共溶剂混合物中的溶液热力学和优先溶剂化

Journal of Applied Solution Chemistry and Modeling Pub Date : 2018-05-10 DOI: 10.6000/1929-5030.2018.07.01

A. Jouyban, W. E. Acree, F. Martínez

{"title":"Solution Thermodynamics and Preferential Solvation of Atenolol in {Ethanol (1) + Water (2)} Cosolvent Mixtures","authors":"A. Jouyban, W. E. Acree, F. Martínez","doi":"10.6000/1929-5030.2018.07.01","DOIUrl":"https://doi.org/10.6000/1929-5030.2018.07.01","url":null,"abstract":": The solubility of atenolol (ATN) in some {ethanol (1) + water (2)} mixtures expressed in mole fraction at temperatures from 298.2 to 313.2 K was calculated from reported solubility values expressed in molarity scale. The van’t Hoff and Gibbs equations were used to calculate the respective apparent thermodynamic functions: Gibbs energy, enthalpy, and entropy of the dissolution processes. Non-linear enthalpy–entropy relationship was observed for this drug ATN in the plot of enthalpy vs. Gibbs energy of solution with negative slope in the composition region 0.00 ≤ w 1 ≤ 0.20 but positive slope in the region 0.20 ≤ w 1 ≤ 0.40. Beyond this composition, the behavior is more complex. Hence, the driving mechanism for ATN dissolution process is the entropy in water-rich mixtures and the enthalpy in mixtures 0.20 ≤ w 1 ≤ 0.40. Furthermore, the preferential solvation of ATN by both solvents was analyzed by using the inverse Kirkwood- Buff integrals observing that this drug is preferentially solvated by water molecules in water-rich and also in ethanol-rich mixtures but preferentially solvated by ethanol molecules in mixtures 0.24 ≤ x 1 ≤ 0.51.","PeriodicalId":15165,"journal":{"name":"Journal of Applied Solution Chemistry and Modeling","volume":"58 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2018-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74286485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6