Provided is a method for converting waste plastic pyrolysis oil into light olefins with a high yield. The method includes: (1) inputting waste plastic pyrolysis oil into a reactor; (2) allowing the waste plastic pyrolysis oil to react in the reactor in the presence of a catalytic cracking catalyst containing a first metal and a second metal to form a product; and (3) recovering light olefins by separating the catalytic cracking catalyst and oil from the product obtained in step (2).

Embodiments of the present disclosure relate to a powder bed including at least one pair of plates including a horizontally swinging perforated plate and a static perforated plate inside a packed bed or a moving bed that is aerated from below. In some embodiments, the swinging perforated plate may be configured to move horizontally relative to a horizontal plane so as to transmit a horizontal swinging motion to the powder. In some embodiments, the powder bed including the at least one pair of plates may improve uniform gas-solid contact in packed beds, moving beds, or multi-stage fluidized beds using highly cohesive, easily consolidated, or compacted powder. Further, in some embodiments, the powder bed may decrease consolidation and compaction of the powder in the powder bed.

Provided is a method for converting waste plastic pyrolysis oil into light olefins with a high yield. The method includes (1) putting waste plastic pyrolysis oil into a reactor; (2) allowing the waste plastic pyrolysis oil to react in the reactor in the presence of a catalytic cracking catalyst containing (a) a compound of an alkali metal or a compound of an alkaline earth metal and (b) a zeolite to form a product; and (3) recovering light olefins by separating the catalytic cracking catalyst and oil from the product obtained in step (2).

The invention relates to a process for manufacturing a preimpregnated fibrous material containing a fibrous material made of continuous fibers and at least one thermoplastic polymer matrix, wherein the preimpregnated fibrous material is produced as a single unidirectional tape or of a plurality of parallel unidirectional tapes and wherein the process includes a step of impregnating, in particular fully and homogeneously, the fibrous material that is in the form of a roving or of several parallel rovings with the at least one thermoplastic polymer matrix that is in powder form, the impregnating step being carried out by a dry route in a tank and the control of the amount of the at least one thermoplastic polymer matrix in said fibrous material being achieved by control of the residence time of said fibrous material in the powder, with the exclusion of any electrostatic process with intentional charging.

A reactor comprises a reactor vessel defining a confined reactor volume, a support assembly extending about a periphery of the confined reactor volume, a basket positioned within the reactor vessel and supported by the support assembly, the basket having an interior surface and an exterior surface, a downflow zone being defined between the exterior surface of the basket and an interior surface of the confined reactor volume, an inlet screen positioned adjacent to one end of the interior surface and an outlet screen positioned adjacent to an opposite end of the interior surface, an upflow zone defined between the inlet screen and outlet screen, the inlet screen and the outlet screen containing a quantity of particulate catalyst, and a circulating device positioned above said upflow zone and configured to continuously circulate fluid upwardly though said upflow zone and downwardly through said downflow zone, the support assembly and the basket configured to promote the formation of a fluid vortex within a portion of the downflow zone.

The present invention relates to a polymerization reactor. The polymerization reactor according to one aspect of the present invention comprises: a housing including a supply part for supplying a reactant; a tube which is provided inside the housing and extends along the height direction of the housing; a first impeller including a blade which spirally surrounds the tube along the height direction of the housing; a second impeller which is provided inside the housing in order to enable the reactant to flow into the tube; and a partition wall which is provided to surround the second impeller along the circumferential direction.

A packing system is disclosed that has a series of flat blades arranged to promote mixing in a fluidized bed such as one in a FCC stripper, with an upward flowing gas stream and a downward flowing solid particle stream. The blade arrangement provides for different gas solids flow directions within a single layer of packing system to enhance cross mixing of gas and catalyst in all directions and reduces the potential for gas and catalyst bypassing. The blade arrangement has splits which minimizes the tendency for phase separation around the blade. The arrangement and sizing of the blades is intended to promote intimate contact between the two phases to ensure efficient mass transfer of material trapped inside the particles to the gas phase. The arrangement of the blades prevents excessive bubble growth and channeling, both of which reduce surface area for mass transfer.

The invention starts out from a fluidizing apparatus (1) for conditioning solid particles, consisting of a distribution chamber (2), a turbulence chamber (3), wherein the turbulence chamber (3) has separating walls (10) or the like for conveying solid particles along a conveyor path, a solid particle inlet unit (6) as well as a solid particle outlet unit (7) and a flow receiving base (11), wherein an air distribution plate (18) is arranged below the flow receiving base (11), and opening ratios, which result through openings (22) in the air distribution plate (18), vary.

The adjustable build envelope for powder bed fusion machines includes a frame in the build chamber having four movable sides, a base and two motors with lead screws. The motors are placed at an angle of 45 with respect to the side of the frame, so that as the motors rotate the lead screws, the two sides of the frame slide in opposite directions. The sides move inward with the help of guide pins and dovetail grooves, thereby reducing the build envelope volume. For large builds, both motors rotate in the reverse direction to increase the build envelope volume. By changing the build envelope volume according to the given build size, powder waste is reduced.

A fluid-solids contactor comprising an annular rotating fluidized bed and a method of using the same are disclosed. The fluid-solids contactor includes a vessel and a plurality feed inlets disposed thereon. The vessel comprises a stationary inner wall, an outer wall, and a chamber formed between the stationary inner wall and the outer wall. The feed inlets are configured to create an annular rotating bed with mixture of solids and a fluid when the solid particles and a fluid are fed into the chamber. The stationary inner wall of the vessel is permeable to the fluid such that the fluid from the chamber can be continuously withdrawn from the solids to the space within the stationary inner wall of the vessel.