Pre-Reducing Process Kinetics to Recover Metals from Nickel Leach Waste Using Chelating Resins

Tenneco develops economic process to recover ethylene from waste streams

A COMMERCIALLY viable method of recovering polymer-grade ethylene from waste gas streams has been ded o p e d by TeMeCO Chemicals. Called the ESEP process, it is based on the cuprous aluminum tetrachloride technoIogy previously applied by Tenneco to the recovery of carbon monoxide from dilute gas streams, Cosorb. (ESEP and Cosorb are trademarks.) The ESEP effort, as described by Arthur P. Gutie...

Microbial Leaching Process to Recover Valuable Metals from Spent Petroleum Catalyst Using Iron Oxidizing Bacteria

Spent petroleum catalyst from Korean petrochemical industry contains trace amount of metals such as Ni, V and Mo. Therefore an attempt was made to recover those trace metal using bioleaching process. Different leaching parameters such as Fe(II) concentration, pulp density, pH, temperature and particle size of spent catalyst particle were studied to evaluate their effects on the leaching efficie...

Extraction Heavy Metals from Contaminated Water Using Chelating Agents

Water pollution caused by toxic elements is one of the most important environmental problems in the world. Heavy metals are toxic to human and dangerous for the environment. The objectives of this study were: the effects of chelating agents on heavy metals extraction from polluted water were carried out to examine. In different concentrations : 0.01, 0.05, 0.1 mg/l of Chelating agents: Ethylene...

Dissolution Process Modeling for Recycling Different Metals from Solid Waste

Branched polymeric media: boron-chelating resins from hyperbranched polyethylenimine.

Extraction of boron from aqueous solutions using selective resins is important in a variety of applications including desalination, ultrapure water production, and nuclear power generation. Today's commercial boron-selective resins are exclusively prepared by functionalization of styrene-divinylbenzene (STY-DVB) beads with N-methylglucamine to produce resins with boron-chelating groups. However...