Asbestos Waste Treatment—An Effective Process to Selectively Recover Gold and Other Nonferrous Metals

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...

Cross-correlations between spot and futures markets of nonferrous metals

In this paper, we investigate cross-correlations between nonferrousmetal spot and futures markets using detrended cross-correlation analysis (DCCA). We find the existence of significant cross-correlations for both return and volatility series. The DCCA-based crosscorrelation coefficients are very high and decrease with the futures maturity increases. Using the multifractal extension of DCCA, th...

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...

Mechanochemical treatment to recycling asbestos-containing waste.

Numerous industrial and experimental facilities have been set up, particularly in the last ten years, as a result of studies and researches on treating asbestos-containing waste (ACW) to stabilise it and to enable its reuse. Some of the stabilisation processes reduce the hazards of ACW by imprisoning in a cement or resonoid matrix. Other processes modify the fibrous structure of asbestos and tr...

Dissolution Process Modeling for Recycling Different Metals from Solid Waste