Analysis of nickel?niobium alloys by inductively coupled plasma optical emission spectrometry

Lima, Belmira Benedita de; Conte, Rosa Ana; Nunes, Carlos Ângelo

doi:10.1016/s0039-9140(02)00471-x

Cited by 10 publications

(3 citation statements)

References 13 publications

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“…The samples used to analysis were dissolved in hydrofluoric acid and hydrochloric acid first. [9][10][11] The state of the mixture of titanium tetrachloride and dichloromethane was identified by Raman spectra method. The Raman spectrum was measured with Lab RAM ARAMIS, using 632 nm (laser) as the excitation source.…”

Section: Discussionmentioning

confidence: 99%

Recovery of TiCl₄from the slurry formed in raw titanium tetrachloride by extraction with halogenated hydrocarbon

Xiang

Wang

et al. 2014

Canadian Metallurgical Quarterly

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The recovery of TiCl 4 from the slurry formed in raw titanium tetrachloride was studied and a new environment friendly process was developed by selective extraction, gravity sedimentation and distillation. The results from the experiment confirmed that this technology was an effective method for the recovery of TiCl 4 from the slurry. During selective extraction and gravity sedimentation process, dichloromethane was considered to be the best extractant comparing to chloroform and carbon tetrachloride. Meanwhile, nearly 91% of TiCl 4 was recovered by extracting with dichloromethane in the solvent/slurry (L/S) ratio of 2 : 1 for 5 min. The study of gravity sedimentation also indicates that the concentration of TiCl 4 in the extracting solution should be controlled to ensure the separation of extracting solution and residue by gravity sedimentation. Raman spectroscopy analysis and relative volatilities of CH 2 Cl 2 and TiCl 4 indicates that titanium tetrachloride and dichloromethane can be separated effectively by distillation. Finally, the experiment confirmed the separation of CH 2 Cl 2 and TiCl 4 , and crude titanium tetrachloride with TiCl 4 and CH 2 Cl 2 concentration of 8?46 and 0?09 mol L 21 , respectively were obtained by distilling the extracting solution at 120uC.On a é tudié la ré cupé ration du TiCl 4 de la suspension formé e dans le chlorure de titane brut et l'on a dé veloppé un nouveau procé dé vert par extraction sé lective, dé cantation par gravité et sé paration par distillation. Les ré sultats ont indiqué que cette technologie constituait une mé thode efficace de ré cupé ration du TiCl 4 de la suspension. On a examiné les conditions affectant l'efficacité de l'extraction du TiCl 4 dans le procé dé , incluant le rapport de masse L/S et la duré e de contact. L'expé rience de sé dimentation a indiqué que le ré sidu avait une plus grande vitesse de sé dimentation dans le mé lange de chlorure de titane et de chlorure de mé thylè ne par rapport au chlorure de titane. On a estimé le diamè tre moyen de la particule de ré sidu au moyen de l'é quation de Navier-Stokes, d'aprè s les ré sultats expé rimentaux. L'analyse de spectroscopie Raman a indiqué qu'il ne se produisait pas de ré action et qu'il n'y avait pas de nouvelles espè ces engendré es lorsque le chlorure de titane é tait dissous dans le chlorure de mé thylè ne. L'expé rience de distillation a montré que l'on pouvait sé parer efficacement le mé lange de chlorure de titane et de chlorure de mé thylè ne par distillation.

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Section: Discussionmentioning

confidence: 99%

Recovery of TiCl₄from the slurry formed in raw titanium tetrachloride by extraction with halogenated hydrocarbon

Xiang

Wang

et al. 2014

Canadian Metallurgical Quarterly

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“…were measured by inductively coupled plasma atomic emission spectroscopy (ICP-AES) using a PS-6 Plasma Spectrovac, Baird (USA). Samples analysed for niobium were dissolved in hydrofluoric acid and hydrochloric acid (Lima and Conte, 2003;Lu and Makishima, 2007;Yang and Pin, 2002). The X-ray diffraction (XRD) patterns were recorded on a Rigaku Miniflex diffractometer with Cu K X-ray radiation at 35 kV and 20 mA.…”

Section: Materials and Analysismentioning

confidence: 99%

Metal recovery from TiCl4 slurry by evaporation and acid leaching

Xiang

Wang

Xia

et al. 2019

J. S. Afr. Inst. Min. Metall.

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TiCl 4 slurry containing valuable metals is an unavoidable by-product of the titanium ore chlorination process. The recovery of these valuable metals, which include titanium, niobium, tantalum, and aluminum, is an urgent issue to tackle in the titanium industry. The results of this investigation show that the valuable metallic elements can be recovered from the slurry by evaporation in a sealed container and leaching with dilute hydrochloric acid. After evaporation at 200°C for 60 minutes, nearly 99% of the titanium was recovered in the form of TiCl 4 , which was formed by the reaction of the TiO 2 in the slurry with AlCl 3. After evaporation, metals like niobium, aluminum, and tantalum remained in the residue. By leaching with 2.1 mol/L HCl at a L/S ratio of 6:1 mL/g at 80°C for 60 minutes, the soluble metals, such as aluminum, iron, and copper were all removed from the residue, and the niobium and tantalum were further enriched in the leach residue. A concentrate containing 53.40 wt% Nb and 5.57 wt% Ta was obtained by washing the leach residue with dilute aqueous ammonia under stirring. A potential waste water purifying agent containing 263.75 g/L AlCl 3 was produced by purifying the leaching solution with Al(OH) 3 and modified polyacrylamide.

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“…Inductively coupled plasma optical emission spectrometry (ICP-OES) is widely used for the determination of Ta in Nb and its compounds. [3][4][5][6][7][8][9] Although it is not as sensitive as the less available and more expensive ICP-MS method, it can be used to determine Ta in difficult to excite Nb materials at levels of 10 À2 to 10 À3 % Ta. 10 One of the reasons for not taking full advantage of the ability of these methods to determine low concentrations of Ta is the lack of availability of pure reference materials (Nb compounds containing <5 Â 10 À4 % Ta).…”

Section: Introductionmentioning

confidence: 99%

Pre-concentration of Ta(V) by solvent extraction before determination of trace amounts of Ta in Nb and Nb compounds

Turkowska

Smolik

2016

Anal. Methods

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Analysis of nickel?niobium alloys by inductively coupled plasma optical emission spectrometry

Cited by 10 publications

References 13 publications

Recovery of TiCl₄from the slurry formed in raw titanium tetrachloride by extraction with halogenated hydrocarbon

Recovery of TiCl₄from the slurry formed in raw titanium tetrachloride by extraction with halogenated hydrocarbon

Metal recovery from TiCl4 slurry by evaporation and acid leaching

Pre-concentration of Ta(V) by solvent extraction before determination of trace amounts of Ta in Nb and Nb compounds

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Analysis of nickel?niobium alloys by inductively coupled plasma optical emission spectrometry

Cited by 10 publications

References 13 publications

Recovery of TiCl4from the slurry formed in raw titanium tetrachloride by extraction with halogenated hydrocarbon

Recovery of TiCl4from the slurry formed in raw titanium tetrachloride by extraction with halogenated hydrocarbon

Metal recovery from TiCl4 slurry by evaporation and acid leaching

Pre-concentration of Ta(V) by solvent extraction before determination of trace amounts of Ta in Nb and Nb compounds

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Recovery of TiCl₄from the slurry formed in raw titanium tetrachloride by extraction with halogenated hydrocarbon

Recovery of TiCl₄from the slurry formed in raw titanium tetrachloride by extraction with halogenated hydrocarbon