Chevron U.s.a. Inc.

Other

Harold J Trimble

David E Earls

Bruce Edward Reynolds

Robert W Bachtel

Robert J Klett

David N Brossard

Julie Chabot

Krishniah Parimi

Dennis R Cash

William B Krantz

Brian A Darsow

The invention comprises an OCR catalyst reactor which includes passive spheres and catalyst particles having substantially the same size and separated on opposite sides of a distributor cone by a screen. The use of passive spheres of substantially the same size to the catalyst particles provides for a more uniform distribution of the gas liquid reactants charged into the reactor vessel. The screen is configured such that it provides a separation of the catalyst and the passive spheres while being sized to prevent plugging.

Balanced flow resistance OCR distributor cone

A method, and a reactor, for hydroprocessing a hydrocarbon feed stream through multistage fixed catalyst beds contained within a single onstream reactor vessel, with a separate catalyst addition and a separate catalyst withdrawal system for the upper or top essentially fixed catalyst bed. The upper or top essentially fixed catalyst bed functions as a guard catalyst bed for removing a major proportion of contaminants (e.g. organometallic constituents) from a hydrocarbon feed stream in order to extend the life of one or more fixed catalyst beds serially disposed underneath the upper or top essentially fixed catalyst bed. Catalyst particles are withdrawn from the essentially fixed catalyst bed by slurrying or liquifying the catalyst particles in a container disposed within the reactor. A method for retrofitting a reactor assembly having two or more fixed catalyst beds in order to place a guard catalyst bed in the upper or top portion of the reactor assembly.

Fixed bed reactor assembly having a guard catalyst bed

This invention makes possible substantially continuous flow of uniformly distributed hydrogen and hydrocarbon liquid across a densely packed catalyst bed which substantially fills the entire volume of a reactor vessel. Catalyst are selected to be essentially the same density, shape and size at a design feed rate of liquids and gas to prevent ebullation of the packed catalyst bed at the design feed rates. The liquid and gas components of the hydrocarbon feed stream flow into the bed of catalyst and a quenching medium, which is preferably a liquid, is injected into the bed of catalyst. Injection of a liquid quench reduces the gas component of the hydrocarbon feed stream while simultaneously increasing the residence time and reducing the liquid velocity of the liquid component of the hydrocarbon feed stream within the substantially packed bed of catalyst. Injection of a liquid quench also increases penetration and contact of the liquid component into and on the surface area of the catalyst while simultaneously decreasing the viscosity of the liquid component. An apparatus for quenching in hydroprocessing of a hydrocarbon feed stream.

Apparatus and method for quenching in hydroprocessing of a hydrocarbon

An apparatus for quenching in hydroprocessing of a hydrocarbon feed stream, which provides a substantially continuous flow of uniformly distributed hydrogen and hydrocarbon liquid across a densely packed catalyst bed which substantially fills the entire volume of a reactor vessel. Catalyst are selected to be essentially the same density, shape and size at a design feed rate of liquids and gas to prevent ebullation of the packed catalyst bed at the design feed rates. The liquid and gas components of the hydrocarbon feed stream flow into the bed of catalyst and a quenching medium, which is preferably a liquid, is injected into the bed of catalyst. Injection of a liquid quench reduces the gas component of the hydrocarbon feed stream while simultaneously increasing the residence time and reducing the liquid velocity of the liquid component of the hydrocarbon feed stream within the substantially packed bed of catalyst. Injection of a liquid quench also increases penetration and contact of the liquid component into and on the surface area of the catalyst while simultaneously decreasing the viscosity of the liquid component.

This invention makes possible substantially continuous flow of uniformly distributed hydrogen and hydrocarbon liquid across a densely packed catalyst bed to fill substantially the entire volume of a reactor vessel by introducing the fluids as alternate annular rings of gas and liquid (i.e. a mixture of liquid hydrocarbon and a hydrogen-containing gas) at a rate insufficient to levitate or ebullate the catalyst bed. Catalyst are selected by density, shape and size at a design feed rate of liquids and gas to prevent ebullation of the packed bed at the design feed rates. The liquid and gas components of the hydrocarbon feed flow into the catalyst bed from concentric annular rings that are coaxial with the catalyst bed. At the desired hydrocarbon flow rate, such catalyst bed continually flows in a plug-like manner downwardly through the reactor vessel. Catalyst is removed on a periodic or semicontinuous basis by laminarly flowing catalyst particles in a liquid stream out of the bottom of the catalyst bed. Intake for such flow is out of direct contact with the stream of gas and hydrocarbon liquid flowing through the catalyst bed. The removed catalyst is introduced into a high pressure vessel for classification into high-activity less dense catalytic particulates and low-activity more dense catalytic particulates. The high-activity less dense catalytic particulates are separated in the high pressure vessel from the low-activity more dense catalytic particulates, and are subsequently mixed with fresh catalyst and returned to the reactor vessel.

Method for extending the life of hydroprocessing catalyst

A golf game having at least one game board carrying a pictorial configuration of a multi-hole golf course including appropriate pictorial representations of a tee, a green with a boundary and distant from the tee, a hole on each green, a fairway generally extending between the tee and the green, and a plurality of hazards positioned adjacent to the fairway and to the green. At least one ball marker is provided to signify a golf ball of a player and adapted to be moved and positioned on the game board by a player after a golf shot. A plurality of dice, matrix type schedules, and distance/direction guages are used to determine where golf shots come to rest. A method for playing a golf game which includes selecting a golf club and manipulating simultaneously a six-sided die and a twelve-sided die in order to randomly generate a pair of numbers that are used to determine the distance and direction of a golf shot from a pair of matrix type schedules. The method for playing a golf game additionally comprises plotting each golf shot.

Golf game and method for playing a golf game

Disclosed are a towel adapted to be worn by the user and a method of making such towel. A single sheet of absorbent and pliant fabric material is cut such as to have a top end and a bottom end opposed to the top end and a first side and a second side opposed to the first side. A stiffening member is disposed against the fabric towel material. The top end is folded over to form a top fold. The first side edge is folded over and against the stiffening member to form a first rear towel face. The second side edge is folded over and against the first rear towel face. The stiffening member is encapsulated in the fabric towel material by securing the various towel faces together underneath the stiffening member and securing together the tops of the various folded towel material.

Growing community of inventors

Novato, CA, United States of America

Harold J Trimble