Description: technologyComment of tantalum powder production, capacitor-grade (CN, RoW): After the production of tantalum concentrate (30% Ta2O5), it is digested at high temperature through the use of hydrofluoric and sulfuric acid. The produced Ta solution is filtered - thus removing the insoluble minerals – and then undergoes liquid-liquid separation (solvent extraction) using methyl isobutyl ketone (MIBK) to separate niobium from tantalum. The MIBK in tantalum is stripped from the solution and tantalum is precipitated as hydroxide by adding ammonia (NH3). Then, the hydroxide is calcined in a furnace to produce pure tantalum oxide. The pure tantalum oxide is later reduced to pure tantalum powder by bringing the pure tantalum oxide in contact with magnesium vapour, in a multiple hearth furnace or rotary kiln. The stoichiometric equation is the following: Ta2O5 + 5Mg -> 5MgO + 2Ta. The unreacted magnesium is assumed to be recovered. Sulfuric acid and ultrapure water are then utilized to remove the magnesium oxide, producing magnesium sulfate which is removed from the solution and therefore serves as a by-product that can be further processed.
Types:
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text_type: Report,
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Comment: This is a market activity. Each market represents the consumption mix of a product in a given geography, connecting suppliers with consumers of the same product in the same geographical area. Markets group the producers and also the imports of the product (if relevant) within the same geographical area. They also account for transport to the consumer and for the losses during that process, when relevant. This is the market for 'tantalum, powder, capacitor-grade', in the Global geography. Transport from producers to consumers of this product in the geography covered by the market is included. 'tantalum, powder, capacitor-grade' is an inorganic substance with a CAS no. : 007440-25-7. It is called 'tantalum' under IUPAC naming and its molecular formula is: Ta. It is solid under normal conditions of temperature and pressure and appears in powder form. The substance is modelled as a pure substance. On a consumer level, is used in the following products: metals, metal surface treatment products and laboratory chemicals. On industrial sites, the substance is used for the manufacture of products in the following sectors: electrical, electronic and optical equipment, machinery and vehicles and metals. This market is supplied by the following activities with the given share: tantalum powder production, capacitor-grade, CN: 0.480000107072789 tantalum powder production, capacitor-grade, RoW: 0.519999892927211 generalComment of tantalum powder production, capacitor-grade (CN): This dataset refers to the extraction and reduction processes applied in the produced tantalum concentrate (30% Ta2O5) in order to produce 1 kg of pure tantalum powder in China. China is responsible for approximately 48% of the global tantalum powder production, according to Achebe, J. (2016). This dataset is a disaggregation of the activity ''tantalum production, powder, capacitor-grade'' as found in version 3.7 of the Ecoinvent database that produces tantalum powder from tantalite ore and has been copied from an original dataset covering the geography GLO, due to absence of regionalized dataset. The original data for reduction were provided from a patent from HC Stark Germany. For both the extraction and the refining processes the data were taken from tables 5.5 & 5.7 or already aggregated from figure 5.4, part XI of the Classen et al (2009) report. Specific values were adjusted to reflect today's situation. (consult the sampling procedure and the individual exchange comments). The amount of tantalum concentrate has been adjusted due to the fact that the original datasets assumed a grade of 38% Ta2O5, while in this dataset a grade of 30% is considered (for the calculation of the amount consult the respective exchange comment). Other tantalum sources used for the production of pure tantalum powder (from consumer scrap or from tantalum byproduct stemming from tin production) has not been taken into account. Furthermore, the present dataset is meant to be used exclusively in the context of electronic devices, since tantalum production for alloying purposes follows a different production route (for more in-formation, Fig. 5.1 of the abovementioned source is to be consulted). Reference 1: Classen M., Althaus H.-J., Blaser S.,Tuchschmid M., Jungbluth N., Doka G., Faist Emmeneg-ger M. and Scharnhorst W. (2009) Life Cycle lnventories of Metals. Final report ecoinvent data v2.1, No 10. EMPA Dübendorf, Swiss Centre for Life Cycle lnventories, Dübendorf , CH, Online-Version under: www .ecoinvent.ch. Reference 2: Achebe, J. (2016). Substance Flow Analysis of Tantalum: Tracking the Conflict-Free Path. In: UWSpace. Link: https://uwspace.uwaterloo.ca/bitstream/handle/10012/10582/Achebe_Jessica.pdf?sequence=3%26isAllowed). None generalComment of tantalum powder production, capacitor-grade (RoW): This dataset refers to the global average extraction and reduction processes applied in the produced tantalum concentrate (30% Ta2O5) in order to produce 1 kg of pure tantalum powder. On a global scale, China is responsible for approximately 48% of the global tantalum powder production, according to Achebe, J. (2016). This dataset is a disaggregation of the activity ''tantalum production, powder, capacitor-grade'' as found in version 3.7 of the Ecoinvent database that produces tantalum powder from tantalite ore and has been copied from an original dataset covering the geography GLO, due to ab-sence of regionalized dataset. The original data for reduction were provided from a patent from HC Stark Germany. For both the extraction and the refining processes the data were taken from tables 5.5 & 5.7 or already aggregated from figure 5.4, part XI of the Classen et al (2009) report. Specific values were adjusted to reflect today's situation. (consult the sampling procedure and the individual exchange comments). The amount of tantalum concentrate has been adjusted due to the fact that the original datasets assumed a grade of 38% Ta2O5, while in this dataset a grade of 30% is considered (for the calculation of the amount con-sult the respective exchange comment). Other tantalum sources used for the production of pure tantalum powder (from consumer scrap or from tantalum byproduct stemming from tin production) has not been taken into account. Furthermore, the present dataset is meant to be used exclusively in the context of electronic devices, since tantalum production for alloying purposes follows a different production route (for more in-formation, Fig. 5.1 of the abovementioned source is to be consulted). Reference 1: Classen M., Althaus H.-J., Blaser S.,Tuchschmid M., Jungbluth N., Doka G., Faist Emmeneg-ger M. and Scharnhorst W. (2009) Life Cycle lnventories of Metals. Final report ecoinvent data v2.1, No 10. EMPA Dübendorf, Swiss Centre for Life Cycle lnventories, Dübendorf , CH, Online-Version under: www .ecoinvent.ch. Reference 2: Achebe, J. (2016). Substance Flow Analysis of Tantalum: Tracking the Conflict-Free Path. In: UWSpace. Link: https://uwspace.uwaterloo.ca/bitstream/handle/10012/10582/Achebe_Jessica.pdf?sequence=3%26isAllowed). None
Origin: /Bund/UBA/ProBas
Tags: Magnesiumsulfat ? Ammoniak ? Hydroxid ? Magnesium ? Magnesiumoxid ? Niob ? Tantal ? Brüden ? Lösungsmittel ? Oxid ? Schwefelsäure ? Drehofen ? Keton ? Schwefelsäureherstellung ? Bergbau ? Nebenprodukt ? Wasser ? Mineral ? Ofen ? Manufacture of basic metals ? Manufacture of basic precious and other non-ferrous metals ? Manufacturing ?
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Language: Deutsch
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