PQ Chemicals (Thailand) Ltd. is a wholly owned subsidiary of the PQ Corporation. Its head office is located in Valley Forge, Pennsylvania; the United States.PQ zeolite plant in Thailand is located in Laem Chabang Industrial Estate, Chonburi province. The detergent grade zeolite (Zeolite A) permits detergent manufacturers for more environment-safe and economical products to replace zeolite imports and also permits the reduction use of phosphates. The zeolite produced is exported to various countries in Asia and Latin America.