Ecolab, Inc., St. Paul, MN, has acquired Midland Research Laboratories, Inc., a Lenexa, KS-based provider of water treatment products, process chemicals and services for the commercial, institutional, industrial, food and sugar processing markets. Midland has sales of approximately $16 million. “This acquisition reflects Ecolab’s ongoing interest in water care products and services to the middle market, focusing on customers in our existing core markets including hospitality, health care and fo...