Претраживање
Приказ резултата 1-6 од 6
Recycling of silver-plated brass for production of high purity copper and ultrafine silver powder for electric contacts
(Bulgarian Chemical Communications, 2014)
The paper presents an improved process for recycling of silver-plate brass housing. Silver and copper are recovered with a purity of 99.99 % and 99.90 %, respectively, with the aim of obtaining materials of higher value ...
Stability of gold complex based on mercaptotriazole in acid and neutral media
(Bulgarian Academy of Sciences, 2018)
Stability of the gold complex based on mercaptotriazole in two acid electrolytes with different pH values and in a neutral medium was investigated in this work. Investigation was performed by visual monitoring and ...
Recovery of precious (Au, Ag, Pd, Pt) and other Metals by e-scrap processing
(Bulgarian Chemical Communications, 2014)
The professional paper is a brief report of an investigation results to be adopted into production. In fact it is a resume of a study on the idea of e-scrap processing and metal production in Mining and Metalurgy Institute ...
Differences in the mode of thermomechanical processing between white gold alloys to produce semi-finished products
(Bulgarian Acad Science, Sofia, 2015)
The results of the investigation of the reduction degree on the hardness of a gold sample with chemical composition Au58,5Ag15Cu9,5Ni9Zn5Pd3 for old white gold alloy and Au58,5Ag18Cu10,5Ga8Zn5 (wt %) for new white gold ...
Optimization of the electrochemical synthesis of silver nanoparticles in poly(vinyl alcohol) colloid solutions
(Bulgarian Acad Science, Sofia, 2017)
This work focuses on the optimization of electrochemical synthesis of silver nanoparticles in poly(vinyl alcohol) colloid solutions, films and hydrogel discs with the ability for immobilization of silver nanoparticles and ...
IR/Raman characterization of Au-mercaptotriazole crystals
(Bulgarian Academy of Sciences, 2019)
The aim of this study was a characterization of the crystals of gold complexes based on mercaptotrazole, obtained from solutions with different pH values (2, 4, 7, and 9), using the methods of infrared (IR) and Raman ...