Hoechst Celanese Corp.'s 225-employee advanced materials group moves from Chatham, NJ, to new headquarters at the 45-acre Robert L. Mitchell Technical Center in Summit, NJ. The Mitchell complex also is home to the company's research division and advanced technology group. Adhesive and sealant supplier Essex Specialty Products Inc. moves its 200 employees to a new 73,000-sq.-ft. (6,800-sq.-m) facility in Auburn Hills, MI.