Recovery of Valuable Chlorosilane Intermediates by a Novel Waste Conversion Process

Brinson, J. Ashley

Dow Corning Corporation (United States)

关键词: 08 Hydrogen;    Recycling;    Silicone;    37 Inorganic, Organic, Physical And Analytical Chemistry;    Feeding;   

DOI  :  10.2172/795522
RP-ID  :  DOE/AL/99566-4
RP-ID  :  FC04-94AL99566
RP-ID  :  795522

美国|英语

来源: UNT Digital Library

【 摘 要 】

From 1994 to 2001, Dow Corning studied a waste recycling process to recover direct process residues (DPR) resulting from the production of silicone precursors. Over the course of eight years, Dow Corning constructed and operated a pilot plant, a small scale commercial plant, and a full scale plant. The process reacts DPR with hydrogen and chlorosilane monomers at high temperature and high pressure. The process converted 85% of the DPR to valuable chlorosilane monomers such as dimethyldichlorosilane and methyldichlorosilane. When feeding methyltrichlorosilane, the process converted 30% of the MeSiCl3 to other monomers. Alternate co-feed monomers were tested. By converting waste DPR to valuable intermediates, the technology significantly reduces waste from the basic silicones manufacturing process.