Uop Lcc

Ricardo L Castillo

Neal E Cammy

Andrea G Bozzano

John Qianjun Chen

Paul R Cottrell

Steven A Bradley

A process for producing light olefins from oxygenates wherein internal reactor are protected from metal-catalyzed coking preferably by employing a protective layer.

Methanol-to-olefins process with reduced coking

An FCC process and apparatus that blends spent and regenerated catalyst before the catalyst contacts the feed in a reaction zone. The circulation rate of spent catalyst is automatically controlled based on a circulation rate of regenerated catalyst.

FCC process and apparatus with automatic catalyst recycle control

Wash water is used to remove impurities such as hydrogen sulfide, ammonia, and hydrogen cyanide from light hydrocarbons and gases derived from refinery fluid catalytic cracking operations. The present invention is a process of low pressure recirculation of wash water combined with low pressure removal of waste water which results in the efficient removal of the above impurities at significantly reduced wash water rates.

Process for improved water wash in FCC gas concentration units

In an etherification process that uses an FCC effluent as a source of isoolefins, the buildup of nitrites in an alcohol-containing stream that is recycled to the etherification zone is prevented by dragging at least a portion of a water-containing stream produced by a water washing of the FCC effluent and returning the water-containing stream to the FCC gas concentration zone. As a result, the etherification catalyst deactivation rate is reduced and without increasing the net amount of fresh water employed by the process combination.

Nitrile removal in an etherification process

This FCC process suspends a layer of catalyst in a riser outside an FCC reactor vessel at a location above a primary riser outlet. The density at the riser outlets is higher than the flowing density in the riser. The suspended catalyst provides a disengagement zone that enhances the separation of catalyst from product vapors. The riser operates in a manner that prevents any discharge of catalyst from its end. The arrangement also provides a convenient method for venting stripping vapors into a closed reactor cyclone system.

Growing community of inventors

Arlington Heights, IL, United States of America

Ricardo L Castillo