After a scheduled maintenance turnaround, Taiwan's Formosa Petrochemical Corp has restarted its No. 1 crude distillation unit on April 20. The three units were shut on March 10. Formosa plans to resume production at a 80,000 bpd residual desulphurization unit this week and a 84,000 barrels residual fluid catalytic cracker, by the end of the month. The two secondary facilities convert heavier streams of refined oil into higher-valued fuel products.