Synthesis of rutile TiO2 powder by microwave-enhanced roasting followed by hydrochloric acid leaching

Kang, Juanxue; Gao, Lei; Zhang, Mingyuan; Pu, Juan; He, Lin; Ruan, Rongsheng; Omran, Mamdouh; Peng, Jinghui; Chen, Guo

doi:10.1016/j.apt.2019.12.042

Cited by 23 publications

(10 citation statements)

References 58 publications

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“…At higher microwave frequencies, the energy absorption occurs primarily due to dipole molecules, which are reoriented under the influence of a microwave electric field [5]. The microwave synthesis method is used to obtain various TiO2 NPs [33,34]. In [34], the rutile TiO2 powder was prepared from titanium slags by microwave activation (Fig.…”

Section: Microwave Methodsmentioning

confidence: 99%

“…The microwave synthesis method is used to obtain various TiO2 NPs [33,34]. In [34], the rutile TiO2 powder was prepared from titanium slags by microwave activation (Fig. 6), and the effect of Na2CO3 additive on crystallinity, phase transformation, surface functional groups and surface microstructure of the calcined product was studied.…”

Section: Microwave Methodsmentioning

confidence: 99%

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Methods of Titanium Dioxide Synthesis (Review)

Mironyuk

Soltys

Tatarchuk

et al. 2020

Phys. Chem. Solid St.

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TiO2-based nanomaterials are attracting much attention in many areas, such as photocatalysis, photoelectricity, probing, electrochromism, photochromism, etc. They are widely used in paints, polymers, sunscreens, and toothpaste. There are various ways of synthesis that affect the size, shape, and crystallinity of TiO2 nanoparticles. The main methods of obtaining titanium dioxide (with the structure of anatase, rutile or brookite) in the form of spheres, rods, fibers, and tubes include: sol-gel technology, hydrothermal and solvothermal methods, microwave method involving high-frequency electromagnetic waves, template method, electrodeposition, a sonochemical method using ultrasound, chemical and physical vapor deposition, "green" methods, etc. This literature review presents modern scientific results on the production of TiO2 nanoparticles by various methods.

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Section: Microwave Methodsmentioning

confidence: 99%

Section: Microwave Methodsmentioning

confidence: 99%

Methods of Titanium Dioxide Synthesis (Review)

Mironyuk

Soltys

Tatarchuk

et al. 2020

Phys. Chem. Solid St.

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“…The previous work has confirmed that adding CH 3 COONH 4 into NH 3 -H 2 O system is efficient for promoting the zinc extraction from zinc-containing residues [26]; however, zinc ferrite (ZnFe 2 O 4 ), zinc silicate (Zn 2 SiO 4 ), and zinc sulfide (ZnS) are difficult to leach under the NH 3 -CH 3 COONH 4 -H 2 O system, which causes the Zn leaching rate was low with only 83.76% [24,27]. On the other hand, the successful applications of microwave heating instead of conventional heating to open inclusions ore and complex ore pretreatment process have been reported continuously [28][29][30][31][32]. Therefore, this study proposed an activate pretreatment of zinc-containing residues by adding low-cost and widely-sourced calcium oxide (CaO), and intended to introduce microwave heating technology into the CaO activation pretreatment process of zinc-containing residues to realize the conversion of refractory ore phase (including ZnS, ZnFe 2 O 4 , and Zn 2 SiO 4 ) into pre-treated ore phase, further to improve Zn extraction rate.…”

Section: Introductionmentioning

confidence: 99%

Investigations on the Thermodynamics Characteristics, Thermal and Dielectric Properties of Calcium-Activated Zinc-Containing Metallurgical Residues

Zheng

Gao

et al. 2022

Materials

Self Cite

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An activate pretreatment of zinc-containing metallurgical residues were proposed by adding CaO and introducing microwave heating approach into the CaO activation pretreatment process to realize the conversion of refractory ore phases into pre-treated ore phase. Thermodynamic characteristics analysis indicated that adding CaO can realize the conversion of refractory ore phases, with the same effect as the carbon additives. Thermal conductivity properties analysis denoted that the thermal conductivity properties of ZnS and ZnFe2O4 were relatively poor. Meanwhile, the thermal conductivity properties of the residues sample added with 25% CaO were significantly superior to the residues added with other CaO contents, with the maximum specific heat value of 1.348 J/g·K at 350 °C. Dielectric properties analysis highlighted that adding CaO with the dielectric constant properties significantly higher than that of other substances can enhance the microwave absorption capacity of zinc-containing residues. The decrease in dielectric loss and loss tangent value with the increase of temperature and the residues having large microwave penetration depth guaranteed to obtain better uniformity of microwave heating. Furthermore, adding 25% CaO promoted the microwave penetration depth of the residues sample increased in the range of 300–500 °C. This work can lay a theoretical research foundation for solving the key difficulty for efficient Zn recovery from complex zinc-containing metallurgical residues.

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“…This makes use of rutile's high chromium absorption capacity, which also helps to solve water pollution. Ma et al 15 evaluated the efficiency of application of titanium industries through structural evaluation using viscous properties of high titanium slag. In this way, research on the recovery of titanium through wet reactions is active in trying a different reaction method than in the past.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the chloride effectiveness of synthetic rutile and natural rutile manufactured from ilmenite ore

Jung

Kim

Lee

2021

Sci Rep

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Studies on continuous and selective chlorination by using ilmenite have been actively conducted because the efficient removal of FeO from ilmenite(FeTiO3) ore using selective chlorination not only improves the reaction purity of TiCl4 but it also leads to price competitiveness compared to TiCl4 synthesized from natural rutile. The chlorination of synthetic rutile with FeO removed was compared with that of natural rutile to examine the reaction efficiency. The selective chlorination efficiency depends on the input amounts of coke and Cl2, as shown by thermodynamic calculation, when FeO is selectively removed. It was found that manufacturing of TiCl4 was easier by using the synthetic rutile, because it had greater porosity than natural rutile. Relatively greater pore volumes were found in the synthetic rutile than in natural rutile. It was confirmed that the reaction efficiency of chlorination for TiCl4 production was directly related to the difference in the porosity distribution between the titanium ores, as verified by a kinetic comparison of synthetic and natural rutiles.

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Synthesis of rutile TiO2 powder by microwave-enhanced roasting followed by hydrochloric acid leaching

Cited by 23 publications

References 58 publications

Methods of Titanium Dioxide Synthesis (Review)

Methods of Titanium Dioxide Synthesis (Review)

Investigations on the Thermodynamics Characteristics, Thermal and Dielectric Properties of Calcium-Activated Zinc-Containing Metallurgical Residues

A comparative study on the chloride effectiveness of synthetic rutile and natural rutile manufactured from ilmenite ore

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