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All Journal KOVALEN: Jurnal Riset Kimia JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Jurnal Pengelolaan Laboratorium Pendidikan FLUIDA Fullerene Journal of Chemistry Jurnal Offshore: Oil, Production Facilities, and Renewable Energy Jurnal Teknik Kimia dan Lingkungan Journal of Green Science and Technology
Andrijanto, Eko
Politeknik Negeri Bandung
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Transportation

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Pengaruh Temperatur Kalsinasi Terhadap Kapasitas Ion Katalis Asam Heterogen Berbasis Silika dan Aplikasinya pada Sintesis Metil Oleat: The Effect of Calcination Temperature on the Ion Capacity of Heterogeneous Silica-Based Acid Catalysts and Its Application in the Synthesis of Methyl Oleate Suryadi, Joko; Nabila, Nanda; Bayhaqi, Syafa Neiska; Andrijanto, Eko
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 2 (2023): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i2.16457

Abstract

Sulfated silica catalyst is a solid acid catalyst which in its application is used to accelerate esterification reactions. The purpose of this study was to determine the effect of calcination temperature and increasing the amount of catalyst on the effectiveness of silica as a catalyst in the formation of methyl oleate through esterification reactions. The synthesis of sulfuric acid catalyst from rice husk ash went through several stages, including preparation of raw material for rice husk ash, production of silica using the sol-gel method, manufacture of silica-based acid catalysts and characterization of the sulfated silica catalyst. The acid catalyst was prepared using impregnation method with sulfuric acid and calcined at various temperatures of 500, 600, 700 and 800oC. The characterization of the acid catalyst formed includes ionic capacity, catalyst performance in the esterification reaction, and the determination of the bond characteristic functional groups using FTIR. The results of ion capacity analysis showed that the highest acidity value was found in the sulfated silica catalyst calcined at 600oC of 0.372 mmol/gram. Testing the performance of the catalyst in the esterification reaction with a ratio of 4:1 (methanol:oleic acid) obtained an ester conversion of 38.89% using a catalyst of 30% of the amount of oleic acid. Identification results using FTIR show that sulfate ions have chemically interacted with silica at around 1103.28 cm-1
Enhancement Of Salt Quality with Recrystallization Method from Crude Salt Raw Material on a Laboratory Scale Suryadi, Joko; Witcaksono, Saifa Haikal; Salsabila, Putri Widad; Andrijanto, Eko; Ferawati, Yohana Fransiska; Jayanti, Retno Dwi; Rinaldi, Kardian; Haryadi, Haryadi
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10609

Abstract

Indonesia has significant maritime potential, particularly in salt production. However, national salt production has not yet met domestic demand, especially for industrial-grade salt, which requires a minimum NaCl content of 97%. Crude salt produced using traditional methods often contains only 88-94% NaCl and includes impurities such as Ca, Mg, and sulfate. This research aims to produce recrystallized salt that meets industrial standards and to determine the optimal conditions in a laboratory-scale simulator. The experimental method was conducted by simulating evaporation on a recrystallization table. Salt solutions were prepared from crude salt with varied concentrations of 22%, 25%, and 30%. The observed parameters included solution density, evaporation rate, and the content of NaCl, total hardness, and sulfate in the salt product. The results showed that recrystallization significantly increased the NaCl content and reduced impurities. Optimal conditions were achieved with a 22% salt solution, where crystal formation produced recrystallized salt with an NaCl content of 99.33%, total hardness of 0.47%, and sulfate content of 8.56 ppm. This quality has the potential to meet industrial salt standards. This study can serve as a reference for industrial salt production on a larger scale.
Co-Authors Alfiana Adhitasari Amanda, Nanda Ravenia Bayhaqi, Syafa Neiska Bevi Lidya Elizabeth, Lidya Ferawati, Yohana Fransiska Hanifah, Hani Haryadi - Jayanti, Retno Dwi Mentik Hulupi Nabila, Nanda Nurul, Dhea Oki Putra Paramitha, Tifa Putri, Anindya Indrita Raihan Nurfauziah Rinaldi, Kardian Rispiandi Rispiandi Rusdan Fadila Sabinna Azahra Sulaeman Salsabila, Putri Widad Salsabilla, Shafira Saripudin Saripudin Setyaningrum, Sinta Shafira Yulianthina Sudrajat Harris Abdulloh Suminar, Dian Ratna Suryadi, Joko Witcaksono, Saifa Haikal Zulfa Rahmah Fadillah