Mexico’s president announced Monday that Royal Dutch Shell has agreed to sell its controlling interest in the Deer Park refinery in Houston, Texas to its partner Mexican state oil company Pemex for $596 million. According to Andres Manuel Lopez Obrador, the deal makes Pemex the sole owner of the refinery. The Deer Park Refining Limited Partnership was a 50-50 joint venture between Shell and Pemex subsidiary P.M.I. Norteamerica, S.A. De ...