HOUSTON–(BUSINESS WIRE)–Ketjen Corporation, a leader in catalyst and specialty chemicals innovation, today announced that André Lanning has been appointed Chief Executive Officer, succeeding retiring CEO Michael J. Simmons. Lanning will guide Ketjen through its next stage of growth and development. As CEO of Ketjen, Lanning will focus on accelerating Ketjen’s strategic priorities, driving continued operational excellence and delivering industry-leading solutions, service and quality to custom