Mineral oils: processes and products – Chemical conversion of hydrocarbons – Reforming
Patent
1990-07-06
1992-02-25
Myers, Helane E.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Reforming
208135, 208136, 208137, 208138, 208139, 208140, 208141, 208142, 165133, C10G 3506
Patent
active
050910752
ABSTRACT:
A process for the reforming of hydrocarbons is improved by the use of an enhanced nucleate boiling surface in a selected portion of the feed effluent heat exchanger. In a vertical type heat exchanger where the reforming feedstream enters at a lower end of the heat exchanger and is at least partially vaporized in the heat exchanger by contact with a reforming effluent stream that enters an upper end of the heat exchanger and is at least partially condensed therein, an enhanced nucleate boiling surface is formed on the heat exchange surface that is in contact with the entering liquid phase portion of the stream feed. The enhanced nucleate boiling surface increases the amount of condensing that takes place on the opposite side of the heat exchange surface in a boiling-condensing zone. The use of the enhanced nucleate boiling surface in the boiling zone of the heat exchanger not only improves the heat transfer coefficient on the boiling side of the tube wall surface, but also the overall heat transfer on the opposite condensing side of the tube wall surface. The addition of the enhanced nucleate boiling surface provides a substantial increase in the overall heat exchange and the overall heat transfer coefficients for the heat exchanger.
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Godry Thomas J.
O'Neill Patrick S.
Ragi Elias G.
McBride Thomas K.
Myers Helane E.
Tolomei John G.
UOP
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