Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Srecko R. Stopic"'
Autor:
Hanwen Chung, Laras Prasakti, Srecko R. Stopic, Dominic Feldhaus, Vesna S. Cvetković, Bernd Friedrich
Publikováno v:
Metals, Vol 13, Iss 3, p 559 (2023)
The results obtained from the work on a concept of a recycling process for NdFeB magnets to recover rare earth elements for remanufacturing similar magnets are presented. This paper investigates the viability of extracting rare earth metals from magn
Externí odkaz:
https://doaj.org/article/782c29971c994853b68e4a4d6c090463
Autor:
Gvozden Jovanović, Mladen Bugarčić, Nela Petronijević, Srecko R. Stopic, Bernd Friedrich, Branislav Marković, Srđan Stanković, Miroslav Sokić
Publikováno v:
Metals, Vol 12, Iss 12, p 2021 (2022)
Electric waste from numerous devices that are put out of use every day has some form of printed circuit board that contains precious and valuable metals in their components. In order to extract these metals, the printed circuit boards were crushed an
Externí odkaz:
https://doaj.org/article/887bc245006b4a4dab16d13579fdde74
Autor:
Srećko R. Stopić, Vladimir Damjanović, Radislav Filipović, Mary D. Kamara, Bernd G. Friedrich
Publikováno v:
Vojnotehnički Glasnik, Vol 71, Iss 4, Pp 1069-1086 (2023)
Introduction/purpose: Bauxite residue as a waste product from the aluminium industry produced through the Bayer process is mainly composed of iron oxide, titanium oxide, silicon oxide and undissolved alumina together with a wide range of other oxides
Externí odkaz:
https://doaj.org/article/48f0201cea9541d1a9acb8197e74daff
Autor:
Srećko R. Stopić, Bernd G. Friedrich
Publikováno v:
Vojnotehnički Glasnik, Vol 71, Iss 3, Pp 783-796 (2023)
Introduction/purpose: Hydrogen is the most abundant element in the universe (75 % by mass) and the lightest element (with a density of 0.00082 g/cm3) which consists of only one proton and one electron. Because of its presence in many different forms
Externí odkaz:
https://doaj.org/article/d9a51c0873b945459e554e33d7e13dfd
Publikováno v:
Vojnotehnički Glasnik, Vol 69, Iss 2, Pp 486-498 (2021)
Introduction/purpose: Carbonation of minerals (olivine and wollastonite) and secondary materials such as slag under high pressure in autoclaves has high importance due to environmetal problems. Methods: The most important for this process is to ha
Externí odkaz:
https://doaj.org/article/280b34c976be414dacc0e0bcc80260bb
Autor:
Srećko R. Stopić, Bernd G. Friedrich
Publikováno v:
Vojnotehnički Glasnik, Vol 68, Iss 4, Pp 877-894 (2020)
Introduction/purpose: Ultrasonic spray pyrolysis (USP) is usually used for the preparation of submicronic and nanosized gold powders. This is a simple method for a synthesis from an aerosol containing dissolved metallic salts such as gold chloride
Externí odkaz:
https://doaj.org/article/6a2e248d87054eec8af27ad99a211224
Autor:
Srećko R. Stopić, Bernd G. Friedrich
Publikováno v:
Vojnotehnički Glasnik, Vol 68, Iss 2, Pp 321-337 (2020)
Introduction/purpose: Cobalt is a strategic metal for industrial application. Cobalt recovery from oxidic ores such as laterite and sulphidic ores, and from secondary materials during acidic treatment and precipitation is a highly used strategy en
Externí odkaz:
https://doaj.org/article/e015c4aa9bf54d948370646226e8ef75
Autor:
Srećko R. Stopić, Bernd G. Friedrich
Publikováno v:
Vojnotehnički Glasnik, Vol 68, Iss 1, Pp 65-78 (2020)
Introduction/purpose: Dissolution of nonferrous metals from oxidic ores such as laterite, high silicon bauxite and eudialyte during acidic treatment was connected with silica gel formation. Methods: Familiarity with behavior of silica in hydrometa
Externí odkaz:
https://doaj.org/article/472daa4f529948a880ee750640052912
Autor:
Srećko R. Stopić, Bernd G. Friedrich
Publikováno v:
Vojnotehnički Glasnik, Vol 67, Iss 3, Pp 561-572 (2019)
Sulfuric acid dissolution of rare earth elements from bastnasite ore was studied after reductive smelting with carbon as a reducing agent at 1600°C. The two-step strategy: 1.carbothermic reduction, and 2.dissolution with sulfuric acid at 70°C wa
Externí odkaz:
https://doaj.org/article/07a79209e5f1497380657a869bbf44a1
Autor:
Srećko R. Stopić, Bernd G. Friedrich
Publikováno v:
Vojnotehnički Glasnik, Vol 67, Iss 2, Pp 241-254 (2019)
Dissolution of rare earth elements from bastnasite ore was studied using different leaching agents such as sulfuric acid, hydrochloric acid, acetic acid, citric acid and sodium hydroxide at 70°C, with 1mol/L, solid/liquid ratio of 0.05 between 30
Externí odkaz:
https://doaj.org/article/3ff3dc7a55ad49d8801b29f983801d64