The U.S. Export-Import Bank voted Thursday to guarantee a JPMorgan Chase loan totaling $35 million to Devco International of Tulsa, Okla., for the design and construction of a sulfur purification plant in Mosul, Iraq. Ex-Im Bank’s financing will support about 380 U.S. jobs, according to bank estimates derived from Commerce and Labor department data. “This significant transaction not only supports American small-business jobs here at home, but it also supports the sulf...