scholarly journals Enhancement of Propylene Glycol Distribution in the Skin by High Purity cis-Unsaturated Fatty Acids with Different Alkyl Chain Lengths Having Different Double Bond Position.

1999 ◽  
Vol 22 (4) ◽  
pp. 407-411 ◽  
Author(s):  
Kenji TAGUCHI ◽  
Shoji FUKUSHIMA ◽  
Yumiko YAMAOKA ◽  
Yoshikazu TAKEUCHI ◽  
Masao SUZUKI
Keyword(s):  
Fatty Acids ◽  
Double Bond ◽  
Propylene Glycol ◽  
High Purity ◽  
Unsaturated Fatty Acids ◽  
Alkyl Chain ◽  
Double Bond Position ◽  
Chain Lengths

Location of double-bond position in unsaturated fatty acids by negative ion MS/MS

1983 ◽  
Vol 105 (16) ◽  
pp. 5487-5488 ◽  
Author(s):  
Kenneth B. Tomer ◽  
Frank W. Crow ◽  
Michael L. Gross
Keyword(s):  
Fatty Acids ◽  
Double Bond ◽  
Unsaturated Fatty Acids ◽  
Double Bond Position ◽  
Negative Ion

scholarly journals Esterification of stearic acid with lower monohydroxylic alcohols

2018 ◽  
Vol 24 (3) ◽  
pp. 283-291 ◽  
Author(s):  
Vlatko Kastratovic ◽  
Miljan Bigovic
Keyword(s):  
Fatty Acids ◽  
Double Bond ◽  
Stearic Acid ◽  
Everyday Life ◽  
Chemical Industry ◽  
Unsaturated Fatty Acids ◽  
Saturated Fatty Acids ◽  
Molar Ratio ◽  
Monocarboxylic Acids ◽  
Chain Lengths

Esters play a significant role in everyday life but also in the chemical industry. The aim of this study is to investigate the influence of different parameters on the process of esterification of higher monocarboxylic acids with lower monohydroxylic alcohols. We examined the influences of the following variables: the type and amount of the catalyst, the structure of alcohols and fatty acids, the acid/alcohol molar ratio, and the temperature of the esterification process. The descending order of reactivity found alcohols is: 1-butanol > 1-propanol > 2-methyl-1-propanol > ethanol > 2-butanol >2-propanol > 2-methyl-2-propanol. The results of this study show no significant effect of chain lengths of saturated fatty acids on the speed and yield of esterification. The presence of the double bond in unsaturated fatty acids reduces the acid to ester conversion. The highest yield (99%) was obtained in the reaction of stearic acid and 1-butanol with an acid/alcohol/catalyst (H2SO4) mole ratio 1/15/0.75 and at a temperature of 65?C.

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