Agrifos, Pasadena, Tex. Rohm and Haas, Deer Park, Tex. 725 SF Phosphates, Rock Springs, Wyo. 35 US Agri-Chemicals, Ft. Mead, Fla. 1,465 Wheeling-Pittsburgh Steel, Follansbee, W.Va.
Material produced by fertilizer manufacturers is primarily captive.
In 1996, Marsulex acquired Coulton Chemical, which provides sulfuric acid regeneration services to oil refineries and chemical companies. Boliden Intertrade was purchased in a management buyout in 1997 and its name changed to Intertrade. That same year, General Chemical purchased Peridot Chemicals. In 1999, Olin's sulfuric acid operations were spun off as Arch Chemicals, and General Chemical's sulfuric acid operations were spun off as GenTek. The Noranda DuPont partnership, a 50-50 joint venture, started in 1998.