Regina and Margaret DeFrancisco a vacant lot, where Regina used nail polish remover to ignite his body. An anonymous caller phoned 911 to report the fire, and after finding Oscar Velazquez's body in the fire, he called 911 again. The sisters tried to sell the Camaro, but were unsuccessful, so they abandoned the vehicle and set it on fire. Regina and Margaret were immediately questioned by police as suspects in the murder of Oscar Velazquez, but their stories did not match up. Before the sisters could be arrested for murder, both fled from the police. After almost two years spent evading police, Margaret DeFrancisco
Solvent extraction and electrowinning cobalt, nickel, zinc and uranium. Solvent extraction and electrowinning Solvent extraction and electrowinning (SX/EW) is a two-stage hydrometallurgical process that first extracts and upgrades copper ions from low-grade leach solutions into a solvent containing a chemical that selectively reacts with and binds the copper in the solvent. The copper is extracted from the solvent with strong aqueous acid which then deposits pure copper onto cathodes using an electrolytic procedure (electrowinning). SX/EW processing is best known for its use by the copper industry, where it accounts for 20% of worldwide production, but the technology is also successfully applied to a wide