Further purification—both for the Royal Mint and other recovery processes—is carried out using methods collectively known as hydrometallurgy. This uses water-based solutions to recover purer ...

The sustainable refining of minerals and circular use of metallic raw materials is enabled by the deep understanding of hydrometallurgy and electrochemical processes aimed at their purification, ...

This work presents an investigation of solvent extraction parameters in order to obtain high purity cerium from a mixture containing other rare earths elements, as an alternative to oxidation and ...

Purgatory is not a second-chance for damned souls to repent. Instead it is a state of cleansing and purification for souls destined for heaven. Also Purgatory is not a means to earn our way to ...

Whole-house air purification systems are available, but they are tied into the heating, ventilating, and air conditioning (HVAC) system of a home or facility. Most current portable air purifiers ...

Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610299, P. R. China ...

School of Materials Sciences and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China Tangshan Research Institute, Beijing Institute of Technology, Tangshan 063000, P. R. China ...