 HOUSTON--BUSINESS WIRE--- OEC chemicals--Orion Engineered Carbons S.A. NYSE: OEC, a worldwide supplier of specialty and high-performance carbon black, announced that the company will release its first quarter 2021 results after the market closes on Thursday, May 6, 2021, to be followed by a conference call on Friday, May 7, 2021, at 8:30 a.m. EDT. The dial-in details for the live conference call are as follow: U.S. Toll Free: 1-877-407-4018 International: 1-201-689-8471 A replay of the conference call may 