HOUSTON--(BUSINESS WIRE)--Solvay, the world’s largest producer of hydrogen peroxide, plans to expand its production facility in Longview, WA., to meet growing demands from pulp and paper producers in the Pacific Northwest and other industrial markets around the United States. Solvay expects to increase its North American production capacity by about 20 percent, supported by a multi-million dollar investment in Longview. This investment will help to ensure that Solvay can continue to supply key