PEMBUATAN PIGMENT TITANIUM DIOKSIDA (TIO2) DARI ILMENITE (FETIO3) SISA PENGOLAHAN PASIR ZIRCON DENGAN PROSES BECHER
ABSTRACT: Indonesia is a
country that has a lot of Ilmenite (FeTiO3), but as yet only plays the role of
an exporter of this important raw material. The exact conditions for processing
Ilmenite into products for sand proficiency levels as well as industrial raw
material pigments are not yet known. Improved grade of titanium dioxide as a
separation process should be supported by research on natural raw material
sources that can be used. One raw material is waste zircon sand in Central
Kalimantan (Borneo), which contains 80-90% of Ilmenite. The purpose of this
research was to determine the effect of aeration time and concentration of salt
catalyst (NH4Cl) on the transformation rate of iron (Fe) into iron oxide
(Fe2O3), where iron oxide and titanium dioxide was separated by acid leaching
process to produce pure titanium dioxide. The titanium oxide purification
process adopted from Becher process which is the process of oxidation,
reduction, aeration, leaching, stripping, and calcination. In this experiment,
the fixed variables used were time of oxidation and reduction of 3 hours and
time of calcination of 3 hours. The changing variables used were aeration time
of 2, 4, 6, and 8 hours; and concentration of salt catalyst (NH4Cl) of 1%, 2%,
and 3%. XRD (X-ray Diffraction) qualitative analysis and GSAS (General
Structure Analysis System) quantitative analysis on the results showed an
increase in TiO2 content on all the variables. The process of increasing TiO2
content at a variable of 1% NH4Cl gave the best result. The greater the
concentration of NH4Cl catalyst, the smaller the TiO2 increase. The best time
for improving the grade of TiO2 was 4 hours, proven by a very effective
transformation of Fe into Fe2O3. The result of research gave a potential
concentration of titanium dioxide was 45.86% with aeration process time of 4
hoursand NH4Cl concentration of 1%.
Penulis: Mohammad Taufik
Mohar, Dewi Fatmawati, Setia Budi Sasongko
Kode Jurnal: jpkimiadd130330
