The present invention pertains to improved processes and catalysts for aromatization. The processes generally contacting a feed stream comprising a naphtha fraction having a C.sub.6 to C.sub.8 content with a catalyst pellet composition to form aromatic hydrocarbons. The catalyst pellet composition generally comprises a plurality of cylindrical pellets each pellet comprising a Group VIII metal on a zeolite. The pellets may have (a) a plurality of holes passing through the length of the cylindrical pellets, (b) a dome-shaped top and bottom, and (c) a plurality of semi-circular grooves along the length of the exterior of the cylinder.

A process for producing an olefin polymer employs a gas phase polymerization reactor having a product discharge system comprising first and second pairs of lock hoppers, wherein each pair comprises an upstream lock hopper connected by valve means to the reactor and a downstream lock hopper connected by valve means to the upstream lock hopper and by further valve means to a product recovery system, and wherein a first cross-tie is provided between the upstream lock hoppers of the first and second pairs of lock hoppers and a second cross-tie is provided between the downstream lock hoppers of the first and second pairs of lock hoppers. Operation of the second cross-tie during product removal cycles is controlled in accordance with reactor pressure.

The current invention concerns a method for producing an aqueous dispersion suitable for being used as a flame retardant additive to wood composite panels. At least one pH-regulator, at least one inorganic thickener, and optionally at least one smoke suppressing agent is added to a premix while maintaining the actuation of wet-milling systems until the dispersion is obtained.

The present invention relates to a process for the polymerization of olefin monomers in the presence of a catalyst system, using a tubular pre-polymerization reactor, wherein the tubular pre-polymerization reactor has a length L and the flow of a catalyst system is introduced in the tubular pre-polymerization reactor in the middle (30-70% of L) or the end (70-95% of L) of the tubular pre-polymerization reactor.

System for generating syngas includes a primary reactor chamber operable to receive material, a plurality of first-stage gas pipes connected to the primary reactor chamber, and a secondary reactor chamber. The primary reactor chamber comprises a plurality of electrodes at least partially protruding into the primary reactor chamber, the electrodes operable to generate an arc capable to generate first-stage gas from breakdown of the material within the primary reactor chamber when electricity is applied to the electrodes. The secondary reactor chamber is operable to receive the first-stage gas via the first-stage gas pipes and to receive water vapor. The first-stage gas combines and interacts with the water vapor to form second-stage gas. Each of the first-stage gas pipes comprise a portion protruding into the secondary reactor chamber that together are adapted to direct the flow of first-stage gas to generate turbulence within the secondary reactor chamber.

A movable device for filling one or more chambers with solid particles in the divided state, the device includes a movable frame, metering means for metering the solid particles comprising two or more metering plates comprising one or more perforations, the metering plates being arranged on top of one another such that the perforation or perforations of one metering plate is/are in connection with the perforation or perforations of the metering plate situated below and/or above it, so as to form one or more metering columns intended to be placed in connection with the chamber or chambers, means for simultaneously releasing the solid particles from the metering means to the chamber or chambers, a storage tank for storing the solid particles, which comprises a bottom pierced with through-holes that are connected with, or can be placed in connection with, the metering column or columns, and comprising unloading means for releasing the solid particles from the storage tank to the metering column or columns.

A bi-modal radial flow reactor comprising a cylindrical outer housing surrounding at least five cylindrical, concentric zones, including at least three annulus vapor zones and at least two catalyst zones. The at least two catalyst zones comprise an outer catalyst zone and an inner catalyst zone. The at least three annulus vapor zones comprise an outer annulus vapor zone, a middle annulus vapor zone, and a central annulus vapor zone, wherein the central annulus vapor zone extends along a centerline of the bi-modal radial flow reactor. The outer catalyst zone is intercalated with the outer annulus vapor zone and the middle annulus vapor zone, and the inner catalyst zone is intercalated with the middle annulus vapor zone and the central annulus vapor zone. A removable head cover can be fixably coupled to a top of the cylindrical outer housing to seal a top of the bi-modal radial flow reactor.

A method for minimizing the amount of catalyst inactivating agent that is present in a liquid fraction recovered from a slurry-based polymer production process, the liquid fraction comprising diluent used in the polymer production process, is disclosed. The method includes steps for controlling the pressure over the liquid fraction collected during diluent recovery so as to minimize the concentration of catalyst inactivating agent that is retained in the recovered liquid fraction. Embodiments of apparatus suitable for conducting the disclosed method are also provided.

A method of assistance and documentation of a filling of tubular reactors comprising recording of filling materials and fill levels of filling materials and documenting the filling materials used, fill levels and results of a catalysis process of tubular reactors produced in such a way.

A system including a dump tank to receive a reactor product comprising a polymer and hydrocarbons, including liquid hydrocarbons, the dump tank including a vessel with a reactor product inlet, a motive gas inlet, a purge gas inlet, gas outlet(s), and a fluid outlet, the motive gas inlet for introducing a motive gas into the vessel, the purge gas inlet for introducing a purge gas into the vessel, the one or more gas outlets located at a top of the vessel and the fluid outlet located at a bottom of the vessel and fluidly connected with a dump tank fluid outlet line having a dump tank outlet valve to control flow of fluid out of the dump tank via the fluid outlet; and a strainer fluidly connected with the dump tank fluid outlet line to allow passage of liquid hydrocarbons therethrough into a hydrocarbon outlet line.