Xconomy.com -- The chairman of Germany-based Merck KGaA told the Boston Globe this week that the company plans to move the headquarters of its U.S. chemical business from New Jersey to Billerica, MA, following his firm’s deal to purchase Billerica-based life sciences firm Millipore for $7.2 billion. The Massachusetts-based division will be called EMD Millipore, Merck chairman Karl-Ludwig Kley told the Globe during a visit to the Bay State this week.