- Carbocatalysis: N-doped reduced graphene oxide catalyzed esterification of fatty acids with long chain alcohols
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Nitrogen doped reduced graphene oxide (N-rGO), 5.8% N readily synthesized from the thermal annealing of graphene oxide (GO) in ammonium hydroxide at 453 K, was demonstrated to be a superior metal-free non-acidic carbo-catalyst for the esterification of fatty acids with different alcohols. The effect of various reaction parameters such as reaction temperature, reaction time, catalyst amount etc. has been studied. The developed catalyst was found to be highly stable and exhibited consistent reusability for seven cycles without any significant decrease in the product yields.
- Porwal, Jyoti,Karanwal, Neha,Kaul, Savita,Jain, Suman L.
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p. 1547 - 1553
(2016/02/19)
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- BRANCHED-CHAIN ESTERS AND METHODS OF MAKING AND USING THE SAME
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Branched-chain esters and methods of making branched-chain esters are generally disclosed. Various uses of such compounds are also disclosed, including uses in personal care compositions and lubricant compositions. In some embodiments, the branched-chain esters are at least partially derived from a renewable source, such as a natural oil.
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Paragraph 0111
(2015/09/28)
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- Catalytic synthesis of the iso-octyl palmitate from palmitic acid and isooctanol with water-tolerant solid acid
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Iso-octyl palmitate is synthesized via esterification of palmitic acid and isooctanol when the water-tolerant solid acid is used as the catalyst. The particular chelate molecular structure of SnC2O4 makes Sn atom have the suitable acid intensity. The steric hindrance in the course of the reaction is reduced because of its molecular structure with the plane surface. In addition, the stability of molecule of SnC2O4 is strengthened because of its chelate molecular structure. All these factors lead to its high catalytic activity in the esterification reaction. Many factors, which have an effect on the yield of iso-octyl palmitate, have been studied. The reaction conditions for synthesizing isooctyl palmitate with high yield are optimized with the orthogonal experiment. The optimum conditions for synthesizing iso-octyl palmitate with high yield are as follows: reaction time is 2.5 h and the mol ratio of isooctanol to palmitic acid is 1.8:1 and the dosage of the catalyst is 2.0 % and the reaction temperature is 150°C.
- Chen,Shi
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body text
p. 4109 - 4113
(2012/01/19)
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- WAX COMPOSITION OF SARGASSUM FULVELLUM
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Sixty-seven compounds were characterized in the wax of Sargassum fulvellum.Characteristic components were the 5-methylhexyl esters of octanoic, decanoic, lauric, myristic, palmitic, palmitoleic, stearic, oleic, linoleic and linolenic, and the 2-ethylhexyl esters of the same acids.The wax of S. fulvellum contains hydrocarbons (1.6percent), esters (21.8percent), free acids (74.9percent) and free alcohols (0.3percent).The principal free alcohols range in chain length only from C6 to C7. - Key Word Index: Sargassum fulvellum; Sargassaceae; Phaeophyta; wax; 5-methylhexyl esters; 2-ethylhexyl esters; 5-methylhexanol; 2-ethylhexanol.
- Miyazawa, Mitsuo,Uematsu, Tosihisa,Kameoka, Hiromu
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p. 1788 - 1791
(2007/10/02)
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