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About Us

PQ is a leading global producer of silicate, zeolite, and other performance materials serving the detergent, pulp and paper, chemical, petroleum, catalyst, water treatment, construction, and beverage markets. Our chemical products are complemented by those of our former subsidiary Potters Industries, a leading producer of engineered glass materials serving the highway safety, polymer additive, metal finishing, and conductive particle markets.

PQ was founded in 1831 and was known as the Philadelphia Quartz Company from 1864 until 1978. The values of our founders - integrity and fairness, diligence and service, learning and imagination - are still reflected in our contemporary corporate culture. We believe that this culture and the strong spirit of teamwork it fosters are of immense benefit to our customers, our employees, and our suppliers alike.

Product Overview

A PQ product is probably helping to make one of the products you use every day safer or more effective. PQ's wide range of products are produced within two core business units:

The Performance Chemicals business encompasses three product and technology platforms based upon silicate, zeolite, and magnesium derivative chemistry.

The Catalysts Group consists of the Silica Catalysts business, which produces advanced silica gel products for catalyst and antiblocking applications; and the Zeolyst International business, which produces zeolite products for catalyst and adsorbent applications.

PQ Locations


Tel: (610) 651-4200
Fax:(610) 651-4504

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Corporate Location

Valleybrooke Corporate Center
300 Lindenwood Drive
Malvern, PA 19355-1740

Mailing Address

P.O. Box 840
Valley Forge, PA 19482-0840

US & Corporate