TPC Group—Miguel A. Desdin, senior vice president and chief financial officer has been appointed interim chief executive to succeed Chairman and Chief Executive Michael T. McDonnell, who is resigning, effective 15 June. A formal search process has begun to find a permanent replacement for McDonnell. Merichem Co.—Ronald J. Bums has been promoted to executive vice president and general manager of Meri-chem's Process Technologies business unit. He had been vice president and general manager of the unit (PCN, 9-16 Apr 2012, p 2).
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机译：TPC集团-高级副总裁兼首席财务官米格尔（Miguel A. Desdin）被任命为临时首席执行官，以接任即将辞职的董事长兼首席执行官麦克唐纳。麦克唐纳将于6月15日生效。正式的搜索过程已开始寻找McDonnell的永久替代品。 Merichem公司。RonaldJ. Bums已晋升为Meri-chem过程技术业务部门的执行副总裁兼总经理。他曾担任该部门的副总裁兼总经理（PCN，2012年4月9日至16日，第2页）。
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