http://repository.ipb.ac.id/handle/123456789/29139 2026-04-25T15:25:07Z 2026-04-25T15:25:07Z Syahbirin, Gustini Darwis, Abdul Aziz Suryani, Ani Syafii, Wasrin http://repository.ipb.ac.id/handle/123456789/76478 2015-10-09T02:55:22Z 2010-01-01T00:00:00Z

Pengaruh Nisbah Pereaksi (Lignin Eupcalyptus – Natrium Bisulfit) Dan Ph Awal Reaksi Sulfonasi Terhadap Karakteristik Natrium Lignosulfonat Syahbirin, Gustini; Darwis, Abdul Aziz; Suryani, Ani; Syafii, Wasrin Eucalyptus lignin was isolated from kraft black liquor through by acidification using H2SO4. Sulfonation of eucalyptus lignin produced sodium lignosulfonate (SLS) which can be used as dispersants, and emulsifier. In this research, sulfonation was carried out towards lignin with mass ratio of eucalyptus lignin-NaHSO3 (b/b) of 1:0.4, 1:0.5, and 1:0.6, and initial pH of 5, 6, 7, 8. Studies on the effect of various ratio of eucalyptus lignin versus NaHSO3 (1 based on w/w) and initial pH of 5,6,and 7 for the sulfonation reaction showed an increasing yield and improved purity of SLS obtained. However, no significant result was observed on the application of initial pH 7 and 8 toward increasing of SLS yield and purity. The highest SLS yield of 83.8% with purity of 82.9% was obtained under condition of initial pH at 7 and the mass ratio of eupcayptus lignin over NaHSO3 was 1:0.5. The resulted SLS was light brown, water soluble, with pH level between 6.3 and 7.24, and released sulfur-like odor.

2010-01-01T00:00:00Z Kurniati, Mersi Kartika, Ika Amalia Fahma, Farah Sunarti, Titi Candra http://repository.ipb.ac.id/handle/123456789/76334 2015-09-23T06:43:39Z 2014-01-01T00:00:00Z

Sifat Fisik Dan Mekanik Papan Partikel Dari Ampas Jarak Kepyar Physical And Mechanical Properties Of Particle Board From Castor Cake Meal Kurniati, Mersi; Kartika, Ika Amalia; Fahma, Farah; Sunarti, Titi Candra The castor cake meal 1ras a by-product of castor oil production and its has recently been highly rated as a source of raw material for particle board, because beyond its high protein content (32-48%) and fibre (28- 33%). The objective of this research was to produce and investigate the physical and mechanical properties of the particle board from castor cake meal. Particle board samples were manufactured using hot pressing temperatures (/50-190°C), pressing time (4-12 minutes). compressed using a pressure (140-220 kglcm1 ) with particles size of 20-100 mesh. The central composite design (CCD) method and ANOVA (a=0.05) with response surface method (RSM) were used to evaluate production of the particle board. The physical and mechanical properties of particle board were determined based on Japanese Industrial Standards, JJS A 5908-2003 type-8. The experimental results showed that the pressing process conditions affected the physical and mechanical properties of particle board. The particle size were significant factor for moisture content, density, water absorption and thickness swelling, pressing temperature were significant factors for modulus of elasticiry,modulus of nipwre and internal bonding of particle board. The smaller particle size (20 to 60 mesh) and the higher pressing temperature (150 to I 70 °CJ. increased moisture content, density, modulus of elasticity, modulus of ntpture, and bonding s1rength and decreased water abso1p1ion and thickness swelling of particle board. Physical and mechanical properties obtained from the best process conditions at a temperarure of I 70 °C, time of 8 minutes, pressure of 180 kgflcm1 and 60 mesh particle size. Based on the overall results, the physical and mechanical properties of particle board did not met requirement of the J/S A 5908-2003 except for moisture content, density and internal bonding.

2014-01-01T00:00:00Z Wijaya, C. Hanny Sudiaman, Sandra Hidayat, Fransisca Kelly http://repository.ipb.ac.id/handle/123456789/55715 2015-08-28T23:59:34Z 2000-03-01T00:00:00Z

Ekstraksi Minyak Atsiri dari Daun Jeruk Purut (Citrus hystrix DC) pada Skala Pilot-Plant Wijaya, C. Hanny; Sudiaman, Sandra; Hidayat, Fransisca Kelly Jeruk purut (Citrus hystricx DC) leave, as essential oil containing material, possibly has high commercial value. Proper production of jeruk purut leaves oil is determined using experimental data obtained from water distillation in pilot-palnt scale. Three alternative distillation conditions: namely chopped put into distillation chamber with 88.5 cm height, and chopped put into chamber with 59 cm height and blended put into distillation chamber with 59 cm height. These methods of extraction produced essential oil with good physical and chemical characteristics as well as having good flavor balance. Theoretically, sliced jeruk purut leaves extracted in distillation chamber at 1,22 m height produced optimal result in pilot plant scale was rendemen of 3.02%.

2000-03-01T00:00:00Z Raharja, Sapta Dwiyuni, Maya http://repository.ipb.ac.id/handle/123456789/53535 2015-09-03T02:38:48Z 2005-01-01T00:00:00Z

Kajian sifat fisiko kimia ekstrak minyak kelapa murni (virgin coconut oil, vco) yang dibuat dengan metode pembekuan krim santan Raharja, Sapta; Dwiyuni, Maya Most commercial grade coconut oils are made from copr. Most of the copra is dried under the sun in the open air, where it is exposed to insects and mold. The standard end product made from copra is RBD (refined bleached, and deodorized) coconut oil. Both high heat and chemicals are used in this method. Some alternative technology to make Virgin Coconut Oil (VCO) have been improved and investigated These are, centrifugal force, fermentation, anzymes, etc. VCO was not made by using of heat and chemicals. it is just refining by washing with water, filtration, and centrijitgation only. In this research, VCO was made by freezing and thawing the coconut milk to destruct the emulsion of coconut milk cream, then centrifugal force was used to separate the oil from coconut milk cream. The problem of this method was high moisture content. so it must be handled b1 adding of salt. Salt is hygroscopic so it can absorb some water. The characterizations were done for oil moisture content, oil yield, free fatty acid, acid value and peroxide value. The result showed that all of parameters meet the APCC standard.

2005-01-01T00:00:00Z