Profile: Tessenderlo Kerley Inc provides enviromental services to the refining, gas processing and petrochemical industries. We offer broadcast application and targeted fertigation through drip and sprinkler irrigation systems. MPR Services, Inc is a business unit of TKI that offers the exclusive HSSX® heat stable salts removal service. We carry a wide range of process chemicals for use as depressants, sulfidizers, collectors, frothers and filter aid chemical reagents for metals purification, primarily from copper, gold and molybdenum ores.