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Gustini Syahbirin
Departemen Kimia, Fakultas MIPA, Institut Pertanian Bogor
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Veterinary

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Journal : Jurnal Teknologi Industri Pertanian

 1 
The Influence Of Reactant Ratio (Eupcalyptus Lignin – Sodium Bisulfite) And Initial Ph Towards Characteristcs Of Sodium Lignosulfonate Gustini Syahbirin; ABDUL Aziz Darwis; Ani Suryani; Wasrin Syafii
Jurnal Teknologi Industri Pertanian Vol. 19 No. 2 (2009): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

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.Key words: lignin, kraft black liquor,  sodium lignosulfonate.
UTILIZATION OF NATRIUM LIGNOSULPONATE FROM BLACK LIQUOR AS DISPERSANT ADDITIVE FOR ECO-MORTAR MIXTURE Sri Mudiastuti, Suryono Suryokusumo, Gustini Syahbirin dan Yuyun Yumairoh
Jurnal Teknologi Industri Pertanian Vol. 20 No. 3 (2010): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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ABSTRACT  Lignin of lignosulfonate was made by a waste product of pulp and paper industry which can be used as a water reducer in a mortar mixture  which consisted of 338 grams of water, 1050 grams of stone granule, 520 grams cement and 0.3 percent of natrium lignosulfonate. The mechanical characteristics of this mortar substances can influence such as diameter of flow, flexural strength, compressive strength, and setting time of cement paste. Lignosulfonate shows its function as dispersant on cement hydration for 3 days as it was analyzed by x-ray difractometer. Research result showed that flow of fresh mortar rise with increase of concentration (from weight of cement) of synthetic natrium lignosulfonate (NaLS). It showed that mortar homogenity also increased. The result of flexural strength and compressive strength tests using synthetic NaLS of 0.1-0.3% from weight of cement showed that addition of synthetic NaLS of 0.2% was the best result as shown it had the highest of flexural strenght and compressive strength values. Initial setting time of cement paste increased about 50% with addition of synthetic NaLS 0.2%. Whereas the final setting time decreased about 8%. Cement hydration test showed the increases of hydration product peak, Ca(OH)2 and calcium silicate hydrate (C-S-H) contents.  Keywords: black liquor, lignosulfonate, mortar, compressive strength, flexural strength  
Co-Authors Abdul Aziz Darwis Aditianingrum, Kurnia Alysia Akhiruddin Maddu Ani Suryani Ani Suryani Aryani, Nursela Sofyanti Mirza Auliya Ilmiawati Azkiyah, Dina Budi Arifin DADANG DADANG EKA CHANDRA LINA Firdayani, Firdayani Fitri, Iis Yusma Komar Sutriah Kurniawanti, Kurniawanti Kusdiantoro Mohamad LAKSMI AMBARSARI Muhamad Alif Hamimdal Nur Qadri Rasyid Pajri Samsi Nasution Purwantiningsih Sugita Rahmani, Nabiila Rasyid, Nur Qadri Shabrina Shabrina Sri Mulijani Syafrida Manuwoto Tesar Dzikrulloh Wahono Esthi Prasetyaningtyas Wasrin Syafii