PQ Corporation

Established in 1930 and located in Baltimore, Delta Chemicals Corporation is a manufacturer and distributor of chemicals used in water and wastewater treatment processes. The company also provides products for concrete floor repair and maintenance and sanitation problems. Delta Chemicals Corporation provides a wide range of chemicals, such as aluminum chloride solution and liquid aluminum sulfate used in chemicals processing; drinking water purification; wastewater treatment; and pharmaceutical and pulp and paper making processes. It also offers water-soluble polymers and aluminum coagulants. Additionally, the company provides a wide range of concrete repair and reinforcement products for the construction industry and corporate clients, such as cleaners and degreasers and All-Krete concrete floor repair kit for repairing potholes, joints, cracks, walls and ceilings.

Millenium Inorganic Chemicals in Hunt Valley, Md., is a wholly owned subsidiary of Lyondell Chemical. With international operations and a strong technology base, Millennium Inorganic Chemicals is the world's second-largest producer of titanium dioxide (TiO2), a product line that diversifies the Lyondell portfolio. Thousands of products from fragrances to aerospace parts to carpets get their start with help from Millennium Inorganic Chemicals. The company has leading market positions in its acetyls business, which is fully integrated with the Equistar ethylene product chain. The company is also the world's largest merchant seller of titanium tetrachloride and a major producer of silica gel and cadmium-based pigments. Since its creation in 1985, Lyondell has built a leading, global, strategically integrated chemical company. It has nearly $15 billion in combined enterprise revenues from Lyondell's Intermediate Chemicals and Derivatives (IC&D) business, and the Equistar, Millennium, and LYONDELL-CITGO refining businesses. Millenium Inorganic Chemicals is based in Houston.

Founded in 1952, Tilley Chemical is an independent, privately owned and managed business that ranks as one of the largest regional chemical distributors in the United States. The company distributes a full line of industrial chemicals and solvents that include specialty chemicals for the food, pharmaceutical and personal care industries. It also distributes a complete line of industrial and automotive oils and lubricants from the leading oil and lubricant producers. Tilley Chemical operates a large distribution facility in Baltimore, as well as warehouse storage in other strategic geographic locations. These facilities enable it to provide product packaging, bulk transfer and handling services on a contract basis for dry bulk and liquid products. Tilley Chemical has a location in Middle River, Md.