CD Tesis

Studi Pendahuluan Produksi Asam Levulinat Umbi Dahlia ( Dahlia Sp. L) Menggunakan Katalis Asam Klorida

---

Dahlia is a floriculture crop having a tuber which is rich in inulin. The inulin
is soluble in hot water but precipited in cold-temperature alcohol. About
4% (b/b dahlia tuber) of grayish white inulin was obtained when 100 g of
dahlia tubers,taken from Bukttinggi West Sumatra, was extracted by the
cold alcohol. A qualitative test using Seliwanof and Nelson-Somogyi
showed the presence of fructose and reducing sugar in inulin. The
extracted inulin was then converted to levulinic acid using acid catalyst at
a high temperature. In the present research, the levulinic acid production
was studied by varying the reaction temperature, reaction time and the
concentration of hydrochloric acid catalyst in an oven-heated ampoule.
The yield of 12,33% (b/b) levulinic acid was obtained when the condition of
reaction was 5% of inulin, reaction time of 150oC, acid concentration of
0,1 M and reaction time of 25 minutes. The increasing reaction
temperature up to 170oC leads to an increase of levulinic acid yield
(26,25% (b/b), while keeping other parameters constant. Whereas about
32,28% (b/b) levulinic acid yield was produced when the reaction
temperature 150oC, acid concentration of 1 M and reaction time of 15
minutes. The results show that the concentration of glucose, levulinic acid
and formic acid increased as the reaction temperature increased; whereas,
the fructose concentration decreased from 55,14 mg/mL to 0,12 mg/mL.
The longer the reaction time was and the higher the hydrochloric acid
catalyst, the more concentration of the glucose and fructose decreased;
while, the concentration of the levulinic acid and formic acid increased.
Keywords: Dahlia tuber (Dahlia sp. L), inulin, levulinic acid.

---

Ketersediaan

Informasi Detail

Judul Seri

-

No. Panggil

10 14.212 (0002)

Penerbit

Pekanbaru : Universitas Riau - Pasca Sarjana - Ilmu Kimia., 2012

Deskripsi Fisik

xiv, 76 hlm.: ilus.; 29 cm

Bahasa

Indonesia

ISBN/ISSN

-

Klasifikasi

10 14.212 (0002)

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

-

Info Detail Spesifik

-

Pernyataan Tanggungjawab

Yuli

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar