A reactor apparatus includes a reactor having a tubular shape, and a plurality of first cooling pipes arranged inside the reactor, for circulating a coolant. Each of the plurality of first cooling pipes has a serpentine portion that extends while repeatedly bending. The serpentine portion includes a plurality of extending portions that extend linearly or extend while curving, and a plurality of bending portions which couple ends of two adjacent extending portions, among the plurality of extending portions. At least two of the plurality of first cooling pipes have different distances from an inner wall surface of the reactor.

A solvent removing apparatus includes a container containing an emulsion comprising a first raw material of a continuous phase and a second raw material of a dispersed phase, an impeller rotating in the container to stir the emulsion, and a foam breaker spaced apart from the impeller on an upper portion of the impeller, positioned below a surface of the emulsion to be submerged in the emulsion when the emulsion is calm, and rotating to reduce foam generated during stirring of the emulsion.

A solvent removing apparatus includes a container containing an emulsion comprising a first raw material of a continuous phase and a second raw material of a dispersed phase, an impeller rotating in the container to stir the emulsion, and a foam breaker spaced apart from the impeller on an upper portion of the impeller, positioned below a surface of the emulsion to be submerged in the emulsion when the emulsion is calm, and rotating to reduce foam generated during stirring of the emulsion.

The present disclosure provides a stirred tank. The stirred tank includes a tank body, a stirring shaft, a plurality of blades and baffles. The tank body is configured to hold the material to be stirred; an axis of the stirring shaft is configured to coincide with an axis of the tank body; the blades are disposed on the stirring shaft; the baffles are disposed in the tank body and arranged at a periphery of the stirring shaft, and each baffle is provided with a plurality of punched holes and has a wave-like cross section. During the agitation of the stirred tank, a large number of high-speed jets are formed after the fluid passes through the punched holes.

Systems and methods for improved mixing, including baffle systems, reactor systems, and methods of using the same are provided herein. These baffle systems include a ring having an exterior surface defining an outer diameter and an outer circumference, an interior surface defining an inner diameter and an inner circumference, a top surface, a bottom surface, and an axis; and one or more substantially vertical baffles extending from the interior surface of the ring toward the axis.

The present invention relates to a rotor that comprises a series of shaped rotor blades whose circumferential section forms a standard NACA four-digit airfoil. Said rotor can be inserted in a stirring device that also comprises a stator, on whose inner surface shaped stator blades are positioned, whose circumferential section forms a standard NACA four-digit airfoil.

The present invention relates to a mixing assembly for controlling mixing of green liquor and a flocculation agent, the mixing assembly comprising a mixing vessel (20) having a first end and a second end, a vessel inlet (21) for supplying liquor and flocculation agent to the mixing vessel in a vicinity of the first end, a vessel outlet (22), a stirring device (31) that is rotatably arranged in the vicinity of the first end for mixing the liquor and flocculation agent by stirring, wherein the mixing vessel (20) has a length from a center of the vessel inlet to a center of the vessel outlet, and the mixing vessel also has a maximum width that is perpendicular to the length, and wherein said length is at least 1.5 times the maximum width. The invention also relates to a method for controlling flocculation of green liquor.

The present invention relates to a mixing assembly for controlling mixing of green liquor and a flocculation agent, the mixing assembly comprising a mixing vessel (20) having a first end and a second end, a vessel inlet (21) for supplying liquor and flocculation agent to the mixing vessel in a vicinity of the first end, a vessel outlet (22), a stirring device (31) that is rotatably arranged in the vicinity of the first end for mixing the liquor and flocculation agent by stirring, wherein the mixing vessel (20) has a length from a center of the vessel inlet to a center of the vessel outlet, and the mixing vessel also has a maximum width that is perpendicular to the length, and wherein said length is at least 1.5 times the maximum width. The invention also relates to a method for controlling flocculation of green liquor.

The invention relates to a process for preparing a solid support for a procatalyst suitable for preparing a catalyst composition for olefin polymerization, said process for preparing said solid support comprising reacting a compound R.sup.4.sub.2MgX.sup.4.sub.2-z with a silane compound Si(OR.sup.5).sub.4-n(R.sup.6).sub.n in a solvent and mixing the resulting mixture with a mixing device and at a certain mixing speed in order to give a solid support Mg(OR.sup.1).sub.xX.sup.1.sub.2-x said solid support obtained having an average particle size of at most 17 m, preferably at most 16 or 14 m, more preferably at most 12 m. The invention further relates to a solid support, a process for preparing a procatalyst and said procatalyst as well as polyolefins obtained using said procatalyst.

A chemical reaction device that supplies a raw material liquid into a solution and causes particles to precipitate in the solution is provided. The chemical reaction device includes an agitation tank configured to accommodate the solution, an impeller configured to agitate the solution, and a plurality of discharge parts configured to discharge the raw material liquid into the solution.