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Exxonmobil Chemical Patents Inc.

Exxonmobil Chemicals Patents, Inc.

George J Wagner

Robert G Tinger

Michel Molinier

Jeffrey L Andrews

Dennis J Stanley

Jeevan Sahib Abichandani

Richard Hiers Wagner

Timothy Paul Bender

In a process for producing para-xylene, a feed stream comprising Caromatic hydrocarbons is separated into a toluene-containing stream, a Caromatic hydrocarbon-containing stream and a Caromatic hydrocarbon-containing stream. The toluene-containing stream is contacted with a methylating agent to convert toluene to xylenes and produce a methylated effluent stream. Para-xylene is recovered from the Caromatic hydrocarbon-containing stream and the methylated effluent stream in a para-xylene recovery section to produce a para-xylene depleted stream, which is then contacted with a xylene isomerization catalyst under liquid phase conditions effective to isomerize xylenes in the para-xylene depleted stream and produce an isomerized stream. The C-containing stream with a transalkylation catalyst under conditions effective to convert C-aromatics to C-aromatics and produce a transalkylated stream, which is recycled together with the isomerized stream to the para-xylene recovery section.

Apparatus for the production of xylenes

In a process for producing para-xylene, a toluene-containing stream is contacted with a methylating agent under conditions effective to convert toluene to xylenes and produce a methylated effluent stream. Para-xylene is recovered from the methylated effluent stream to produce a para-xylene depleted stream and part of the para-xylene depleted stream is contacted with a xylene isomerization catalyst under liquid phase isomerization conditions effective to produce a first isomerized stream, while part of the para-xylene depleted stream is contacted with a xylene isomerization catalyst under vapor phase isomerization conditions effective to produce a second isomerized stream. The first and second isomerized streams are then recycled to the para-xylene recovery step.

Process for the production of xylenes

A traffic control gate having a gate arm and a motor which is removably mountable to existing road structures so as to be portable. An inverted U-shaped bracket straddles the road structure in saddle fashion and is secured thereto. The bracket is preferably a three-piece hinged unit comprising a base and two hinged side plates. The side plates are adjustably positionable about hinges so as to fit the contours of various K-rail sections and other structures. In the event the road surface is the only available structure, the side plates may be removed and the gate mounted on a sturdy table by the base's hinges. The motor is preferably battery operated so that the gate is usable where no external power supply is available. Handles on the base allow the compact gate to be carried to another location.

Portable traffic control gate

A vehicle barrier device is installed in a trench in a roadway. An impaler housing sits in a slot of a liner and supports a pivoting member in a slot in its top surface. The pivoting member has an impaling arm on its forward end, a massive counterweight at its rear end, and a pivot between them. One or more pins and an explosive bolt secure the impaling arm to the forward end of the impaler housing. When the device is remotely activated by security personnel, the bolt explodes, freeing the impaling arm. The counterweight is sufficiently massive so that the pivoting member tends to turn about the pivot under the force of gravity, thrusting the impaling arm above the surface of the roadway. The impaling arm projects at an angle toward a vehicle to be stopped, which is impaled by the arms.

Growing community of inventors

Tomball, TX, United States of America

George J Wagner