Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1991-12-27
1993-05-04
Mars, Howard T.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
518197, C07C 4109, C07C 4105
Patent
active
052083870
ABSTRACT:
An improved process is disclosed for the acid catalyzed production of DIPE from propene and water feedstreams that eliminates the propene recycle stream to the olefin hydration reactor and achieves high propene conversion. The accomplishment is achieved by carrying out the hydration and etherification reactions in two stages wherein the first stage comprises a zeolite catalyzed hydration and etherification of propene employing a minimum of water feed. The second stage converts unconverted propene from the first stage reactor by hydration and etherification to DIPE in contact with an acidic catalyst, preferably acidic resin, and an excess of water. Isopropanol (IPA) from both the first and second stage reactor is recovered as an aqueous azeotrope by a combination of distillation and extraction steps and the azeotrope is recycled to the first stage reactor. In this way, IPA rather than propene is recycled and the advantageous capabilities of the first stage zeolite catalyst for IPA etherification to DIPE are more fully utilized in that reactor.
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Harandi Mohsen N.
Owen Hartley
Keen Malcolm D.
Mars Howard T.
McKillop Alexander J.
Mobil Oil Corporation
Wise L. G.
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