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Ganjar Andaka
Institut Sains & Teknologi AKPRIND Yogyakarta
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Journal : JURNAL TEKNOLOGI TECHNOSCIENTIA

 1 
KINETIKA REAKSI HIDROLISIS GULA DARI TETES TEBU MENJADI ASAM OKSALAT Andaka, Ganjar
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v2i2.448

Abstract

The kinetics of the hydrolysis of sucrose from molasses have been studied in basic aqueous solutions in the presence of potassium hydroxide. This chemical reaction is to produces oxalic acid as main product. The experiments were conducted in the flask which was completed with stirrer, heater, condenser, and thermometer, at temperatures from 80 to 100oC and at reaction times from 30 to 60 minutes. The product of hydrolysis of molasses was analyzed by using standard solution of potassium permanganate to determine the amount of oxalic acid. The results of these investigations show that the kinetics reaction of the hydrolysis of molasses was found to be first order reaction with respect to sucrose. The reaction rate constant was found to be k = 0,2055 exp(−3367,7663/RT) (in minutes−1) or the activation energy and pre-exponential factor was 3367,7663 cal/gmol and 0,2055 minutes−1, respectively.
OPTIMASI KONSENTRASI ASAM SULFAT DAN KECEPATAN PENGADUKAN PADA PROSES HIDROLISIS AMPAS TEBU MENJADI FURFURAL Andaka, Ganjar
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 5 No 2 Februari 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v5i2.537

Abstract

ABSTRACT Hydrolysis of bagasse in the presence of sulfuric acid catalyst to produce furfural was studied. This objective of this work was to study the effects of catalyst consentration and stirrer speed on yield of furfural. The experiment were conducted by reacting bagas-se with sulfuric acid in a three neck flask sized 500 mL equipped with stirrer, heater, condenser, and thermometer. The reaction condition studied were catalyst concentration ranging from 4% to 20% and stirrer speed from 100 rpm to 500 rpm at reaction temperature 100ºC and reaction time 120 minutes. The concentration of furfural was analyzed to calculate the yield of furfural. The analysis of bagasse obtained that the water content of 6.76% and pentosan content of 18.86%. The results show that yield of furfural reached a maximum at the catalyst concentration of 8% is 5.79% and the yield of furfural reached an optimum at the stirrer speed of 400 rpm is 6.29%.
PEMBUATAN SERBUK PEWARNA ALAMI TEKSTIL DARI EKSTRAK DAUN JATI (TECTONA GRANDIS LINN. F.) Yuniwati, Murni; Andaka, Ganjar; Dofianti, Hanyfa; Prawitasari, Harnanda
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 1 Agustus 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v12i1.1810

Abstract

Anthocyanin is a dye that plays a role in providing a brownish red color that has the potential to become a natural dye for food and can be used as an alternative substitute for coloring dyes that are safer for health. Textile dyes are divided into two, namely natural dyes and synthesis dyes. Natural dyes come from animals and plants while synthetic dyes can be produced from chemicals Anthocyanins are widely found in plants with striking colors, one of which is teak leaves. Teak leaves are one part of the teak tree which can be used as a source of natural dyes for textiles by extracting the leaves. This research was conducted to obtain color powder from extracts of dyes from fresh teak leaves using the foam-mat drying method. This study was prepared to study the effect of citric acid addition on color intensity and the addition of chicken egg white to moisture content and solubility of color powder of teak leaf extract. To achieve this goal, in this study used fresh teak leaves with 95% ethanol solvent mass. At the beginning of the process, 25 grams of teak leaves are mashed first, then put into a beaker glass and macerated using a 95% ethanol mass of 250 ml and added 10 ml of citric acid from the amount of solvent with a concentration varied for 24 hours. After that filtered, the filter was taken. Powder making was carried out by foam-mat drying method using chicken egg white as foaming and maltodextrin as filler. The filtrate was added with 8% b/v maltodextrin and chicken egg white with the concentration varied stirred in the mixer until homogeneous. Then the oven is dried at a temperature of 60oC until a constant weight is reached. Using 25 grams of fresh teak leaves, 95% ethanol solvent as much as 250 ml, and 8% b/v maltodextrin obtained optimal conditions at 5% b/v egg white concentration and 30% b/v citric acid concentration, with these conditions obtained the powder results with a moisture content of 8% mass, solubility of 99.22% b/v with a reddish level of 16,625, a brightness level of 43,495, and a yellowish level of 5,925. It is hoped that this research can be used as a reference for the development of further research on anthocyanin dye powder which will then be developed as a raw material for dyes for the chemical industry, and textile industry.
PENGARUH SUHU DAN KONSENTRASI ZAT PENGAKTIF NaCl TERHADAP KUALITAS RENDEMEN DAN DAYA SERAP ARANG AKTIF Andaka, Ganjar; Astuti, Tri
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 10 Edisi Khusus September 2005
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v0i0.1899

Abstract

Coffee shell contains a lot of cellulose which can be used as a raw material to produces activated carbon. The demand of activated carbon tends to increase because it is used for a great variety of purposes, including the decolorizing of solutions of sugar, industrial chemicals, drugs, and dry-cleaning liquids, water purification, refining of vegetable and animal oils, and in recovery of gold and silver from cyanide ore-leach solutions. This investigation studied effect of tempeture and concentration of sodium chloride (as activator) on yield (rendement) and adsorption potential of activated carbon. In this investigation, coffee shell was dipped into the solution of sodium chloride with certain concentration and then it was carbonized into the muffle furnace. The carbon coke formed was then washed by using hot water and dried into the oven. The dried carbon coke was weighed and then tested the adsorption potential. The results of this investigation show that the yield (rendement) and adsorption potential of activated carbon increase with increasing the concentration of sodium chloride, but above the sodium chloride concentration of 20% the yield and adsorption potential of activated carbon tend to decrase. While the adsorption potential of activated carbon increases with temperature of carbonization, the yield of activated carbon decreases with temperature of carbonization, but above the carbonization tempeature of 600oC the adsorption potential of activated carbon tends to decreases.
SINTESIS FURFURAL DARI KULIT BUAH KAPUK RANDU DENGAN KATALISATOR ASAM KHLORIDA Ganjar Andaka
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 9 No 1 Agustus 2016
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v9i1.147

Abstract

Hydrolysis of kapok shell in the presence of hydrochloric acid catalyst to produce furfural was studied. This objective of this work was to study the effects of catalyst concentration and reaction time on yield of furfural. The experiment were conducted by reacting kapok shell with hydrochloric acid in a three neck flask sized 500 mL equipped with stirrer, heater, condenser, and thermometer. The reaction condition studied were catalyst concentration ranging from 0,025 N to 0,2 N and reaction time from 30 minutes to 180 minutes. The concentration of furfural was analyzed to calculate the yield of furfural. The initial analysis of kapok shell obtained that the water content of 6.75%, ash content of 2.31%, and pentosan content of 22.72%. The results show that yield of furfural reached a maximum at the catalyst concentration is 8.01% and the yield of furfural reached an optimum at the reaction time for 180 minutes is 8.03%.
Co-Authors Agung Putu Susastriawan, Anak Amir Hamzah Arumsari, Sentani Bambang Kusmartono Bintang, Friska Bintang, Friska Dofianti, Hanyfa Izhar Fajrah Joko Waluyo Kusmartono, Bambang Marausna, Gaguk MUHAMMAD SHOLEH Muhammad Yusuf Murni Yuniwati Murni Yuniwati, Murni Ningrum, Ambar Pertiwi Nitia Nanda Rama Prawitasari, Harnanda Priyambodo, Sigit Rachmawati, Rr Yuliana Setyowati Rahayu, Suparni Suparni Setyowati Rahayu Tanadi, Kelvin Tri Astuti