STUDI PENGARUH WAKTU, SUHU DAN JUMLAH DEHIDRATOR PADA DEHIDRASI RISINOLEAT MINYAK JARAK DENGAN P2O5
Abstract: The aims of study
are to optimize the reaction’s parameters i.e. time, temperature, and amount of
dehydrator’s agent on the dehydration of ricinoleic of castor oil into
dehydrated castor oil (DCO) by mean P2O5. DCO is the mixed of linoleic acid
(LA) and conjugated linoleic acid (CLA). Dehydration were carried out using
various of time, temperature, and amount of dehydrator. The reaction medium was
maintained under vacuum, gentle bubbling with nitrogen, magnetically stirred
and used Zn’s powder as antipolymerization’s agent. The changes composition of
DCO were analyzed by GC, and identification by FTIR and GC-MS and compared to
CLA’s standard. Best result were obtain for 4 h, at 200°C and 3% (w/w) P2O5.
DCO compositions were : 1.02% of (9c/t – 12c/t) linoleic; 41.97% of (9c/t –
12t/c) linoleic ; 19.50% of (9c/t – 11t/c) CLA ; 19.79% of (9t – 11t) CLA; and
0.90% of residual’s of ricinoleic. The yields of dehydration was 98.98%, and
the decreased 92.98% intensities of –OH wives number in FTIR spectra’s castor
oil comparison with DCO to indicated transform of ricinoleic by dehydration. Both
wave number of alkenes (C=C) at FTIR DCO spectra was indicated to formed of
conjugated alkenes (CLA). The ratio of CLA : linoleic was 0.92 : 1 with
achievement of 63.5% relatively to CLA standard with ratio of CLA : linoleic
was 1.45 : 1.
Penulis: M. Sitorus, S.
Ibrahim, H. Nurdin, D. Darwis
Kode Jurnal: jpkimiadd100189
