Open AccessOPTIMIZING OF TIO2 SEPARATION FROM BANGKA ILMENITE BY LEACHING PROCESS USING HCL
Author(s) -
Sayekti Wahyuningsih,
Hari Hidayatullah,
Edi Pramono
Publication year - 2018
Publication title -
alchemy
Language(s) - English
Resource type - Journals
eISSN - 2443-4183
pISSN - 1412-4092
DOI - 10.20961/alchemy.10.1.16.54-68
Subject(s) - ilmenite , leaching (pedology) , chemistry , nuclear chemistry , rutile , anatase , dissolution , titanium , inorganic chemistry , mineralogy , materials science , metallurgy , catalysis , photocatalysis , organic chemistry , soil science , soil water , biochemistry , environmental science
Separation of titanium dioxide (TiO 2 ) from ilmenite Bangka has been done byleaching processusing HCl. Before the leaching process, ilmenite was roastedat 900 o C for pre-oxidation (preliminary - oxidation). Leaching process carried out by variation of HCl concentration and Fe 0 reducing agents. While the re-deposition of dissolved Ti 4+ ion achieved by hydrolysis - condensation using 2-propanol-H 2 O solvents. Leaching the pre-oxidazed ilmenite shows the phase change of pseudobrokite (Fe 2 TiO 5 ) into hematite (Fe 2 O 3 ) and synthetic rutile (TiO 2 ). Formation of the synthetic rutile was characterized by the loss of intensity of Fe 2 TiO 5 at 26.65º and the increasing intensity of rutile TiO 2 at 27.49º.The dissolution rate of both titanium and iron was found to be increased, generally, by increasing acid concentration in case of HCl as well as by increasing ilmenite: Fe 0 ratio. Precipitation of the dissolved titania with 2-propanol -H 2 Oof 8:2(v /v) produced anatase TiO 2 due to the hydrolysis and condensation of Ti-tetra isopropoxide complexes.