Expanding the useful range of ionic liquids: melting point depression of organic salts with carbon dioxide for biphasic catalytic reactions

2006 ◽  
pp. 3681 ◽  
Author(s):  
Aaron M. Scurto ◽  
Walter Leitner
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquids ◽  
Melting Point ◽  
Catalytic Reactions ◽  
Melting Point Depression ◽  
Organic Salts

Melting point depression of ionic liquids confined in nanospaces

2006 ◽  
pp. 1828 ◽  
Author(s):  
Mitsuhiro Kanakubo ◽  
Yusuke Hiejima ◽  
Kimitaka Minami ◽  
Takafumi Aizawa ◽  
Hiroshi Nanjo
Keyword(s):  
Ionic Liquids ◽  
Melting Point ◽  
Melting Point Depression

scholarly journals Melting point depression effect with CO 2 in high melting temperature cellulose dissolving ionic liquids. Modeling with group contribution equation of state

2016 ◽  
Vol 107 ◽  
pp. 590-604 ◽  
Author(s):  
Joana M. Lopes ◽  
Francisco A. Sánchez ◽  
S. Belén Rodríguez Reartes ◽  
M. Dolores Bermejo ◽  
Ángel Martín ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Melting Point ◽  
Equation Of State ◽  
Melting Temperature ◽  
Group Contribution ◽  
Melting Point Depression ◽  
High Melting ◽  
Depression Effect ◽  
High Melting Temperature

Selective and Complete Hydrogenation of Vegetable Oils and Free Fatty Acids in Supercritical Fluids

2004 ◽  
Author(s):  
Thomas Tacke ◽  
Peter Panster
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Melting Point ◽  
Free Fatty Acids ◽  
Supercritical Fluids ◽  
Vegetable Oils ◽  
Selective Hydrogenation ◽  
Industrial Process ◽  
Fats And Oils ◽  
Catalytic Reactions

As described in other chapters of this book and elsewhere (Jessop, 1999), a wide range of catalytic reactions can be carried out in supercritical fluids, such as Fischer–Tropsch synthesis, isomerization, hydroformylation, CO2 hydrogenation, synthesis of fine chemicals, hydrogenation of fats and oils, biocatalysis, and polymerization. In this chapter, we describe experiments aimed at addressing the potential of using supercritical carbon dioxide (and carbon dioxide/propane mixtures) for applications in the hydrogenation of vegetable oils and free fatty acids. Supercritical fluids, particularly carbon dioxide, offer a number of potential advantages for chemical processing including (1) continuously tunable density, (2) high solubilities for many solids and liquids, (3) complete miscibility with gases (e.g., hydrogen, oxygen), (4) excellent heat and mass transfer, and (5) the ease of separation of product and solvent. The low viscosity and excellent thermal and mass transport properties of supercritical fluids are particularly attractive for continuous catalytic reactions (Harrod and Moller, 1996; Hutchenson and Foster, 1995; Kiran and Levelt Sengers, 1994; Perrut and Brunner, 1994; Tacke et al., 1998). There are a number of reports on hydrogenation reactions in supercritical fluids using homogenous and heterogeneous catalysts (Baiker, 1999; Harrod and Moller, 1996; Hitzler and Poliakoff, 1997; Hitzler et al., 1998; Jessop et al., 1999; Meehan et al., 2000; van den Hark et al., 1999). We have investigated the selective hydrogenation of vegetable oils and the complete hydrogenation of free fatty acids for oleochemical applications, since there are some disadvantages associated with the current industrial process and the currently used supported nickel catalyst. The hydrogenation of fats and oils is a very old technology (Veldsink et al., 1997). It was invented in 1901, by Normann, in order to increase the melting point and the oxidation stability of fats and oils through selective hydrogenation. Since the melting point increases during the hydrogenation, the reaction is also referred to as hardening. The melting behavior of the hydrogenated product is determined by the reaction conditions (temperature, hydrogen pressure, agitation, hydrogen uptake). Vegetable oils (edible oils) are hydrogenated selectively for application in the food industry; whereas free fatty acids are completely hydrogenated for oleochemical applications (e.g., detergents).

Melting point depression of ionic liquids by their confinement in carbons of controlled mesoporosity

Carbon ◽  
2020 ◽  
Vol 169 ◽  
pp. 501-511
Author(s):  
François Béguin ◽  
Vladimir Pavlenko ◽  
Patryk Przygocki ◽  
Mirosława Pawlyta ◽  
Paula Ratajczak
Keyword(s):  
Ionic Liquids ◽  
Melting Point ◽  
Melting Point Depression

Immobilization and melting point depression of imidazolium ionic liquids on the surface of nano-SiOx particles

2010 ◽  
Vol 39 (13) ◽  
pp. 3190 ◽  
Author(s):  
Yusheng Liu ◽  
Guozhong Wu ◽  
Haiying Fu ◽  
Zheng Jiang ◽  
Shimou Chen ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Melting Point ◽  
Melting Point Depression ◽  
Imidazolium Ionic Liquids

Melting Point Depression of Ionic Liquids with CO2:  Phase Equilibria

2008 ◽  
Vol 47 (3) ◽  
pp. 493-501 ◽  
Author(s):  
Aaron M. Scurto ◽  
Elizabeth Newton ◽  
Ross R. Weikel ◽  
Laura Draucker ◽  
Jason Hallett ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Melting Point ◽  
Phase Equilibria ◽  
Melting Point Depression

Carbon dioxide-induced melting point depression of biodegradable semicrystalline polymers

2006 ◽  
Vol 39 (1) ◽  
pp. 107-117 ◽  
Author(s):  
Zhuoyang Lian ◽  
Scott A. Epstein ◽  
Christopher W. Blenk ◽  
Annette D. Shine
Keyword(s):  
Carbon Dioxide ◽  
Melting Point ◽  
Semicrystalline Polymers ◽  
Melting Point Depression

Study of miniemulsion formulation containing 1-octyl-3-methylimidazolium hexafluorophosphate for its application in low-emitting coating products

Soft Matter ◽  
2015 ◽  
Vol 11 (7) ◽  
pp. 1293-1302 ◽  
Author(s):  
Yiyang Kong ◽  
Binjie Hu ◽  
Kwang-Leong Choy ◽  
Xiaoyu Li ◽  
Guangdi Chen
Keyword(s):  
Ionic Liquids ◽  
Melting Point ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Organic Salts ◽  
Waterborne Coatings ◽  
Volatile Organic ◽  
Vocs Emission

Room temperature ionic liquids (RTILs) are non-volatile organic salts, and few of them with low melting point may replace the conventional coalescing agents in waterborne coatings, thus preventing volatile organic compounds (VOCs) emission, caused by coalescing agents.

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