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STRATCO® XP2 technology for the STRATCO® CONTACTOR™ reactor

The STRATCO® XP2 technology is a Contactor™ reactor enhancement developed to improve the acid/hydrocarbon emulsion flow path near the tube bundle end of the Contactor. In the current design, emulsion flow leaves the annulus between the Contactor™ shell wall and circulation tube, then immediately turns and enters the tube bundle.

In the XP2 design, the emulsion flow is extended further along the length of the tube bundle and preferentially distributed across the tube bundle.This enhancement allows for more effective use of the tube bundle heat transfer surface area and a decrease in tube bundle wear near the end of the circulation tube.

With XP2 technology, more heat of reaction can be removed allowing the reactor to operate at lower temperatures at a constant feed rate OR at a higher feed rate at a constant reaction temperature. The more uniform flow regime will reduce maintenance costs and increase reliability of the tube bundle. XP2 technology can be installed in new Contactor™ reactors or retrofitted in the field or shop to any existing Contactor™ reactors with minimal downtime.

Features and Benefits
• Effective surface area is increased due to better flow distribution towards the tubesheet and to the center of the bundle
• 1.5° to 3.5° F (0.8° to 1.9° C) reaction temperature drop at constant olefin feed rate or 3 to 12% olefin feed rate increase at constant reaction temperature
• Tube wear at the circulation tube turnaround is reduced
• Better flow distribution to the center of the tube bundle may result in more uniform wear rates within bundle
• Reduced stagnant area near tubesheet minimizes negative side reactions
• Potential end point and acid consumption improvements

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