Shell has restarted a process to sell its minority 37.5% stake in the Schwedt refinery in Germany, whose majority shareholder is now-sanctioned Russian state oil giant Rosneft, Reuters reported on Tuesday, citing sources with knowledge of the matter. Shell has opened a data room this month and is seeking offers for its stake in the refinery by the end of January, according to some of Reuters’ sources. The Schwedt refinery, the fourth-largest refinery in Germany, used to process Russian oil before Germany cut off supplies…