REC Advanced Silicon Materials, a member of the REC Group, is one of the largest global manufacturers and suppliers of silane gas. The company s patented, closed-loop silane manufacturing process produces ultra-pure silane by conversion of metallurgical-grade silicon into trichlorosilane and reduction/distillation to silane. The continuous-flow process recycles all hydrogen and chloride materials back to the initial reactors, while continuous distillation steps purify the gas. In 2005, Advanced Silicon Materials was acquired by Renewal Energy Corporation and changed its name to REC Advanced Silicon Materials. REC Advanced Silicon Materials has headquarters in Butte, Mont. Its 240-acre site has two silane production units.