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All Journal Jurnal Teknik Kimia USU

Lilis Sukeksi

Departemen Teknik Kimia, Fakultas Teknik, Universitas Sumatera Utara

Author-ID : 4065594

Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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LEACHING KALIUM DARI ABU KULIT COKLAT (Theobroma cacao L.) MENGGUNAKAN PELARUT AIR Lilis Sukeksi; Rizka Dwi Hidayati; Aulia Bismar Paduana
Jurnal Teknik Kimia USU Vol. 6 No. 2 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Recently much attention has been dedicated to generate of useful chemicals from biomass, such as potassium alkali from cacao husk. This potassium can be used as sources of alkali for soap manufacturing. The cacao husks were treated by leaching using water as a solvent to produce alkali potash. First step, the cacao husks and then were dried at 105 ºC for 24 hours. The dried of cacao husk was crashed using ball mill and resulting husk powder were burned in a furnace at 600 ºC for 6 hours and resulting the husk ash powder. The husk ash powder mass variables used in this leaching process were 5 g, 7.5 g and 10 g and the leaching time variables were 30 minutes, 60 minutes and 90 minutes. Meanwhile the leaching temperature variables were 45 ºC, 55 ºC and 65 ºC. The best temperature condition in this process was 65 ºC and leaching time 60 minutes, with the result of potash concentration was 1,01 N and the amount of potash as a potassium hydroxide is 39,91% was analyzed using Atomic Absorption Spectroscop (AAS).

PEMBUATAN SABUN DENGAN MENGGUNAKAN KULIT BUAH KAPUK (Ceiba petandra) SEBAGAI SUMBER ALKALI Lilis Sukeksi; Andy Junianto Sidabutar; Chandra Sitorus
Jurnal Teknik Kimia USU Vol. 6 No. 3 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The purpose of this study is to examine the effect of reaction time and temperature toward the formed of soap product. This study begins by drying the skin of cotton and burning to gain the ash of cotton fruit skin. The combustion is done by using muffle furnace at 500 oC for 3 hours. Then, extraction is done on ash by using aquadest with a ration 1:3 to obtain alkali. This alkali will be used with cooking oil from palm in saponification process with fixed volume variable oil of 30 ml, velocity of stirring is 250 rpm, and oil volume : alkali volume 1:2 (ml). Whereas for the free variable are reaction temperature at 60 oC, 70 oC, 80 oC, stirring time at 60 minutes, 90 minutes, 120 minutes. The observed responses are density, acidity (pH), saponification number and free alkali. The best results were obtained at 80 °C and stirring time of 120 minutes with a density of 1.34 gr / ml, pH 9.1, saponification number of 200.349 and a 0.07% free alkali content.

MASERASI ALKALI DARI BATANG PISANG (Musa paradisiaca) MENGGUNAKAN PELARUT AQUADEST Lilis Sukeksi; Patima Valentina Haloho; Masniar Sirait
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The purpose of this research is to determine the time of alkali absorption from banana stem in semibatch and batch. In this study maceration maseration is a leaching process used to obtain the time required for solvent to absorb alkali in banana stem ash. While the batch system maseration is a leaching process used to obtain the time required for the solvent to reach saturation point (stop absorbing). Data collection techniques in this research are: sample preparation and drying of banana stem, banana stalking process banana stem, brazing ash process of banana stem in semibatch and batch, and determination of alkaline content by titration method. From result of research can be concluded that banana stem potentially serve as source of alkali because potassium (K2O) and sodium (Na2O) content in banana ash sticks respectively 36,19% and 13,99%. Water content and yield of banana ash sticks were 78.6% and 17.7%, respectively. The time for the semibatch system is obtained in 72 hours, while for the batch system was obtained in 12 days. Normalities of alkali extracts in semibatch and batch maceration still increased. Where in the ratio of banana stem ash/solvent is 1 gram / 25 ml; 2 gram / 25 ml; 3 gram / 25 ml; and 4 gram / 25 ml respectively had a normality value that still increased from 0.219 N to 0.567 N; 0.407 N to 0.891 N; 0.578 N to 1,315 N; and 0.819 N to 1,345 N. The highest permeated alkali yield was obtained ratio (banana stem ash/ solvent) 1 gram / 25 ml of 52.37%.

EKSTRAKSI KALIUM DARI ABU KULIT BUAH KELAPA (Cocos Nucifera L.) MENGGUNAKAN PELARUT AQUADEST Gilang Ramadhan; Lilis Sukeksi
Jurnal Teknik Kimia USU Vol. 7 No. 1 (2018): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

In this research, the combustion process was performed conventionally by burning the dried coconut peel of 10 kg in a covered combustion barrel, equipped with a gauge thermometer and having been perforated for the oxygen entrance space for 3 hours with a combustion temperature ranging 500oC and produced ash of coconut peel as much as 1 kg. Extraction was performed by mixing biphasic system between coconut peel ash and aquadest solvent at stirring rate of 250 rpm, variation of time are 40 minutes, 80 minutes, 120 minutes, and 160 minutes with temperatures of 60oC and 80oC. Ash mass ratio: solvent are 5:50, 10:50, 15:50, and 20:50. Results showed that the geater the mass, temperature and extraction time, the higher concentration and pH of alkali extract will be obtained. The concentration and pH of the highest alkali extract were obtained at the ratio of the ash mass: the solvent was 20:50 for the extraction time of 160 minutes at a temperature of 80°C those are 0.775 N and 13.

EKSTRAKSI KALIUM DARI KULIT BUAH KAPUK (Ceiba petandra) Chandra Sitorus; Lilis Sukeksi; Andy Junianto Sidabutar
Jurnal Teknik Kimia USU Vol. 7 No. 2 (2018): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The purpose of this study was to determine the best of combustion time and temperature of ash production from kapok fruit peel ( Ceiba Petandra ) to get the most potassium. The experiment was begun to dry kapok fruit peel for 24 hours at oven with temperature 110 oC and combustion to obtaine the ash from kapok fruit peel. The combustion was done by muffle furnace which time variables were from 3 hours, 4 hours, 5 hours, and 6 hours and burning temperature variables were from, 500 oC, 550 oC,600 oC, 650oC. The potassium that contained in ash have been extracted by distilled water with volume 30 ml for 24 hours. Observed responses were normality, pH, ash content, and potassium oxide content (% K2O). The best result of ash was in 3 hours with temperature 500 oC. The ash was analyzed by using AAS Atomic Absorption Spectroscopy, and 35.91 % of potassium oxide (K2O) content was obtained as maximum result.

PEMBUATAN SABUN TRANSPARAN BERBASIS MINYAK KELAPA DENGAN PENAMBAHAN EKSTRAK BUAH MENGKUDU (Morinda citrifolia) SEBAGAI BAHAN ANTIOKSIDAN Lilis Sukeksi; Meirany Sianturi; Lionardo Setiawan
Jurnal Teknik Kimia USU Vol. 7 No. 2 (2018): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The purpose of this study is to examine the effect of alkali concentration and the amount of added morinda citrifolia toward the formed of soap product. This study begins with maserating the noni fruit with ethanol. Then the making of transparent solid soap was made in the saponification process with a fixed variable oil volume of 70 ml, reaction temperature of 80 ° C and stirring time of 60 minutes. Whereas for the independent variables alkaline solution concentrations were 26%, 28%, 30%, 32%, the amount of noni extract 0 g, 10 g, 20 g, 30 g. The responses observed were water content, acidity (pH), saponification number, free alkali, free fatty acid, foam stability, surface tension and antioxidant activity. The best results were obtained at 26% alkaline concentration and 30 g of noni extract with a moisture content of 24,10%, 0% free alkali content, pH 9,0, free fatty acid content 0,480%, saponification 200 mg / g, surface tension 29,70 dyne / cm, foam stability 81% and antioxidant activity of 153,85 0µg / µL.

Co-Authors Andy Junianto Sidabutar Aulia Bismar Paduana Chandra Sitorus Gilang Ramadhan Lionardo Setiawan Masniar Sirait Meirany Sianturi Patima Valentina Haloho Rizka Dwi Hidayati

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