Liquid−Liquid Equilibria for Methanol/Ethanol + Rubidium Carbonate + Water Systems at Different Temperatures

2009 ◽  
Vol 54 (10) ◽  
pp. 2866-2870 ◽  
Author(s):  
Mancheng Hu ◽  
Xiang Zhu ◽  
Shu’ni Li ◽  
Quanguo Zhai ◽  
Yucheng Jiang ◽  
...  
Keyword(s):  
Water Systems ◽  
Carbonate Water ◽  
Different Temperatures

Some Thermodynamic Properties of the Dimethylsulfoxide–Water and Propylene Carbonate–Water Systems at 25 °C

1974 ◽  
Vol 52 (5) ◽  
pp. 718-722 ◽  
Author(s):  
S. Y. Lam ◽  
R. L. Benoit
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Propylene Carbonate ◽  
Water Systems ◽  
Pressure Measurements ◽  
Free Energies ◽  
Carbonate Water ◽  
Enthalpies Of Mixing ◽  
Molar Excess ◽  
Vapor Pressure Measurements

Molar excess free energies of the systems dimethylsulfoxide–water and propylene carbonate–water have been calculated from static vapor pressure measurements at 25 °C. Enthalpies of mixing at low water concentrations have also been determined. Possible association interactions in these systems are discussed.

Performance of a non-phosphorus antiscalant on inhibition of calcium-sulfate precipitation

2012 ◽  
Vol 66 (1) ◽  
pp. 193-200 ◽  
Author(s):  
Xiaoxu Xue ◽  
Change Fu ◽  
Na Li ◽  
Fangfang Zheng ◽  
Weiben Yang ◽  
...  
Keyword(s):  
Calcium Sulfate ◽  
Water Systems ◽  
Sem Analysis ◽  
Solution Ph ◽  
X Ray ◽  
Thermodynamics And Kinetics ◽  
Scale Inhibition ◽  
Calcium Sulfate Scale ◽  
Different Temperatures ◽  
Strong Ability

The aim of this study is to report on the performance of a novel non-phosphorus antiscalant, acrylic acid (AA)-allylpolyethoxy carboxylate (APEC), being developed for calcium-sulfate scale inhibition in industrial water systems. The performance of AA-APEC on calcium-sulfate scale inhibition was compared with that of the two commercial inhibitors, polyamino polyether methylene phosphonates (PAPEMP) and polyacrylic acid (PAA), containing the same polyethylene glycol segments or carboxyl functional groups as AA-APEC. The study indicated that AA-APEC could act as a highly effective calcium sulfate inhibitor, having strong ability to inhibit the precipitation of calcium sulfate at a dosage of 2 mg L−1, showing approximately 83.6% inhibition. The results also showed that AA-APEC dosage, the solution pH, inhibiting temperature, concentration of Ca2+, and SO42− all play important roles in inhibiting calcium-sulfate precipitation. The precipitation thermodynamics and kinetics at different temperatures were also discussed. X-ray diffractometer (XRD) and scanning electron microscope (SEM) analysis showed that AA-APEC strongly affected the texture and the morphology of the deposited calcium sulfate. Calcium sulfate has been inhibited through stabilization by adsorption onto crystal growth sites of nascent crystals altering their morphology.

Viscosities of ammonium salts in water and ethanol+water systems at different temperatures

2009 ◽  
Vol 146 (3) ◽  
pp. 112-115 ◽  
Author(s):  
Rehana Saeed ◽  
Fahim Uddin ◽  
Summyia Masood ◽  
Nida Asif
Keyword(s):  
Water Systems ◽  
Ammonium Salts ◽  
Different Temperatures

Liquid−Liquid Equilibrium of Poly(ethylene glycol) 6000 + Triammonium Citrate + Water Systems at Different Temperatures

2009 ◽  
Vol 54 (3) ◽  
pp. 1094-1097 ◽  
Author(s):  
Iyyaswami Regupathi ◽  
Shreela Murugesan ◽  
Rajendran Govindarajan ◽  
Samuthira Pandian Amaresh ◽  
Murugesan Thanapalan
Keyword(s):  
Ethylene Glycol ◽  
Water Systems ◽  
Poly Ethylene Glycol ◽  
Liquid Equilibrium ◽  
Different Temperatures ◽  
Poly Ethylene

Liquid–liquid equilibria for some aliphatic alcohols+cesium carbonate+water systems

2005 ◽  
Vol 232 (1-2) ◽  
pp. 57-61 ◽  
Author(s):  
Mancheng Hu ◽  
Lihua Jin ◽  
Quanguo Zhai ◽  
Shu’ni Li ◽  
Zhihong Liu
Keyword(s):  
Water Systems ◽  
Aliphatic Alcohols ◽  
Cesium Carbonate ◽  
Carbonate Water

Several properties of acetonitrile-water, acetonitrile-methanol, and ethylene carbonate-water systems

1967 ◽  
Vol 12 (3) ◽  
pp. 336-337 ◽  
Author(s):  
Glenn P. Cunningham ◽  
George A. Vidulich ◽  
Robert L. Kay
Keyword(s):  
Ethylene Carbonate ◽  
Water Systems ◽  
Carbonate Water
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