(Bloomberg) -- Royal Dutch Shell Plc will begin shutting its Convent refinery in south Louisiana mid-month while it continues to seek a buyer for the facility, part of a plan to reduce its global sites and focus on combined oil refining and chemical plants.With global demand and profits stung by the spread of Covid-19, the shutdown of 53-year-old Convent, which has about 675 employees, is part of Shell’s larger strategy to shrink its portfolio to six facilities from 14 by 2025, Shell said in a statement.