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- Title
ESTERIFICATION OF STEARIC ACID WITH LOWER MONOHYDROXYLIC ALCOHOLS.
- Authors
KASTRATOVIĆ, VLATKO; BIGOVIĆ, MILJAN
- Abstract
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. Estri igraju značajnu ulogu u svakodnevnom životu ali i u hemijskoj industriji. Cilj ovog rada je ispitivanje uticaja različitih parametara na proces esterifikacije viših monokarboksilnih kiselina sa nižim monohidroksilnim alkoholima. Ispitivani su uticaji sledećih varijabli na proces esterifikacije: tip i količina katalizatora, struktura alkohola i masnih kiselina, molski odnos kiselina/alkohol i temperatura. Opadajući niz reaktivnosti ispitivanih alkohola je: 1-butanol > 1-propanol > 2-metil-1-propanol > etanol > 2-butanol > 2-propanol > 2-metil-2-propanol. Rezultati ovog rada pokazuju da nema značajnijeg uticaja dužina lanca zasićenih viših masnih kiselina na brzinu i prinos reakcije esterifikacije. Prisustvo dvostruke veze kod nezasićenih masnih kiselina smanjuje konverziju kiseline u estar. Najveći prinos estra (99%) je dobijen u reakciji stearinske kiseline i 1-butanola sa molskim odnosom kiselina/alkohol/katalizator (H2SO4) 1/15/0.75 na temperaturi od 65 °C.
- Publication
Chemical Industry & Chemical Engineering Quarterly, 2018, Vol 24, Issue 3, p283
- ISSN
1451-9372
- Publication type
Academic Journal
- DOI
10.2298/CICEQ170327040K