STUDI PENGARUH WAKTU, SUHU DAN JUMLAH DEHIDRATOR PADA DEHIDRASI RISINOLEAT MINYAK JARAK DENGAN P2O5
TheÂ aimsÂ ofÂ studyÂ areÂ toÂ optimizeÂ theÂ reactionâ€™sÂ parametersÂ i.e.Â time,Â temperature,Â andÂ amountÂ ofÂ dehydratorâ€™sÂ agentÂ onÂ theÂ dehydrationÂ ofÂ ricinoleicÂ ofÂ castorÂ oilÂ intoÂ dehydratedÂ castorÂ oilÂ (DCO)Â byÂ meanÂ P2O5.Â DCOÂ isÂ theÂ mixedÂ ofÂ linoleicÂ acidÂ (LA)Â andÂ conjugatedÂ linoleicÂ acidÂ (CLA).Â DehydrationÂ wereÂ carriedÂ outÂ usingÂ variousÂ ofÂ time,Â temperature,Â andÂ amountÂ ofÂ dehydrator.Â TheÂ reactionÂ mediumÂ wasÂ maintainedÂ underÂ vacuum,Â gentleÂ bubblingÂ withÂ nitrogen,Â magneticallyÂ stirredÂ andÂ usedÂ Znâ€™sÂ powderÂ asÂ antipolymerizationâ€™sÂ agent.Â TheÂ changesÂ compositionÂ ofÂ DCOÂ wereÂ analyzedÂ byÂ GC,Â andÂ identificationÂ byÂ FTIRÂ andÂ GC-MSÂ andÂ comparedÂ toÂ CLAâ€™sÂ standard.Â BestÂ resultÂ wereÂ obtainÂ forÂ 4Â h,Â atÂ 200Â°CÂ andÂ 3%Â (w/w)Â P2O5.Â DCOÂ compositionsÂ wereÂ :Â 1.02%Â ofÂ (9c/tÂ â€“Â 12c/t)Â linoleic;Â 41.97%Â ofÂ (9c/tÂ â€“Â 12t/c)Â linoleicÂ ;Â 19.50%Â ofÂ (9c/tÂ â€“Â 11t/c)Â CLAÂ ;Â 19.79%Â ofÂ (9tÂ â€“Â 11t)Â CLA;Â andÂ 0.90%Â ofÂ residualâ€™sÂ ofÂ ricinoleic.Â TheÂ yieldsÂ ofÂ dehydrationÂ wasÂ 98.98%,Â andÂ theÂ decreasedÂ 92.98%Â intensitiesÂ ofÂ â€“OHÂ wivesÂ numberÂ inÂ FTIRÂ spectraâ€™sÂ castorÂ oilÂ comparisonÂ withÂ DCOÂ toÂ indicatedÂ transformÂ ofÂ ricinoleicÂ byÂ dehydration.Â BothÂ waveÂ numberÂ ofÂ alkenesÂ (C=C)Â atÂ FTIRÂ DCOÂ spectraÂ wasÂ indicatedÂ toÂ formedÂ ofÂ conjugatedÂ alkenesÂ (CLA).Â TheÂ ratioÂ ofÂ CLAÂ :Â linoleicÂ wasÂ 0.92Â :Â 1Â withÂ achievementÂ ofÂ 63.5%Â relativelyÂ toÂ CLAÂ standardÂ withÂ ratioÂ ofÂ CLAÂ :Â linoleicÂ wasÂ 1.45Â :Â 1.
Keywords:Â Time,Â Temperature,Â AmountÂ ofÂ dehydrator,Â DehydrationÂ ofÂ ricinoleicÂ Â Â
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