Dow Technology Investments LLC

James D Duston

Glenn A Miller

Michael C Becker

Victoria L Biedenstein

Steven H Fisher

Disclosed is an improved exothermic hydroformylation process having at least two reaction stages. Cooling is provided by externally cooling a stream of reaction mixture from one of the stages, dividing the cooled stream into at least two cooled reaction mixture streams; transferring one cooled reaction mixture stream back into the same reaction stage from which it was removed to cool the reaction mixture in that reaction stage; and transferring at least one cooled reaction mixture stream(s) into and through heat exchange means that cool a different reaction stage, and returning it to the same reaction stage from which it was removed.

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Alvin, TX, United States of America

James D Duston