279 results about "Polymerization reactor" patented technology

The invention provides a prepolymerization reactor, a continuous bulk polymerization system and method and PMMA resin. The method comprises the following steps: mixing accurately metered polymeric monomers and auxiliaries, sequentially completing a prepolymerization reaction and a polymerization reaction in serially connected polymerization reactors, and then devolatilizing and granulating a polymerization product to obtain PMMA resin, and comprises the following steps: step 1, purifying and mixing reaction materials; step 2, prepolymerization reaction; step 3, polymerization reaction; step 4, devolatilization; and step 5, granulating. The method overcomes the defects that in the prior art, the polymerization conversion rate is low, the solvent usage amount is large, the molecular weight distribution of the product is wide, light transmittance and other properties cannot meet optical-grade application requirements, and the quality is difficult to accurately regulate and control. Through optimization of a formula and process conditions, a special process system design and combination of polymerization reactors, the contradiction between high conversion rate in the polymerization process and narrow molecular weight distribution of a PMMA product is solved; under the conditions of low solvent addition amount or no solvent, the high conversion rate is obtained, the molecular weight distribution of the polymerization product is narrow, the molecular weight is controllable, and the high-quality optical-grade PMMA resin product is obtained.

The invention belongs to the technical field of chemical production reaction equipment, and discloses a polymerization kettle which comprises a polymerization kettle body and an obliquely arranged condenser, the air inlet end of the condenser is communicated with the top of the polymerization kettle body through a pipeline, the polymerization kettle further comprises a driving assembly, the driving assembly comprises two driving discs, the driving discs are arranged in a shell pass of the condenser, and the driving discs are arranged in the shell pass of the condenser. The two driving discs are rotationally arranged at the air inlet end and the air outlet end of the condenser correspondingly, and the two ends of a tube nest of the condenser penetrate through the two driving discs correspondingly and are fixedly connected with the driving discs; the motor is arranged outside the shell pass, and an output shaft of the motor penetrates through the shell pass and is coaxially and fixedly connected with one driving disc; according to the scheme, the driving disc is driven by the motor to drive the tube nests to rotate, so that the tube nests originally located at the upper part and the lower part are alternately contacted with low-temperature circulating water at the water inlet and high-temperature circulating water at the water outlet, and meanwhile, the temperature distribution of the circulating water is more uniform; according to the invention, the problem of insufficient condensation efficiency caused by low top temperature and high bottom temperature of the kettle top condenser is solved.

A process for the continuous production of a polyolefin polymer in a gas-phase polymerization reactor in the presence of a polymerization catalyst and an antistatic agent, including the steps of (a) providing a mixture of polyolefin particles and gas, (b) conveying the mixture through a pipe at a gas velocity of greater than or equal to 2 m / s, and (c) introducing an antistatic agent into the mixture.

1. A method for transitioning two different catalysts during the production of a polypropylene homopolymer or copolymer in a sequential multi-stage polymerization reaction, said method comprising: a) polymerizing propylene and optionally a comonomer in the presence of a first catalyst in a multi-stage polymerization reactor system comprising a prepolymerization reactor followed by a slurry reactor and then a gas phase reactor; b) discontinuing the supply of the first catalyst to the prepolymerization reactor; c) subsequently introducing propylene, optionally a comonomer, and a second catalyst into said prepolymerization reactor, and further introducing an aluminum alkyl into said polymerization reactor simultaneously with said introduction of said second catalyst; d) polymerizing propylene and optionally a comonomer in the presence of a second catalyst in said multi-stage polymerization reactor system. The process includes the steps of: wherein the first catalyst is a Ziegler-Natta catalyst and the second catalyst is a single-site catalyst; and wherein the amount of aluminum alkyl supplied in step c) is 0.5 to 10.0 g per ton of total propylene supplied into the prepolymerization reactor and the slurry reactor in steps c) and d). The method.

This invention relates to the application of hypergravity technology in coordination polymerization, and discloses a method for preparing hyperbranched polyethylene and its application. The method includes: (1) carrying out coordination polymerization of ethylene monomer, solvent, catalyst solution, and auxiliary catalyst solution under hypergravity conditions; and (2) removing the monomer, washing, separating, and drying the reaction product obtained in step (1). By controlling the hypergravity level, reactant ratio, reaction temperature, and pressure, this invention can obtain high-quality hyperbranched polyethylene products with a number-average molecular weight of 1000-1500000 and a molecular weight distribution index of 1.2-2.5. Compared with reactions in ordinary polymerization reactors, the production efficiency is significantly improved, and the product has a higher molecular weight and a narrower molecular weight distribution.

The utility model belongs to the technical field of polymerization reaction kettles, and particularly relates to an anti-yellowing physical foaming PBT copolyester polymerization reaction kettle which comprises a bottom plate, a plurality of supporting frames are symmetrically arranged at the top end of the bottom plate, the supporting frames are L-shaped, mounting rings are arranged at the top ends of transverse frames of the supporting frames, an outer kettle body is arranged in the mounting rings, and the outer kettle body is arranged in the bottom plate. An inner kettle body is arranged in the outer kettle body, a fixing rod is arranged at the top end of the bottom plate, a chassis is arranged at the top end of the fixing rod, a material mixing assembly is arranged in the inner kettle body and comprises a rotating shaft, the rotating shaft is sleeved with a plurality of shaft sleeves, and a plurality of material mixing rods are arranged on the outer side walls of the shaft sleeves in a surrounding mode; a plurality of scrapers are arranged on the top end surface of the chassis, and a plurality of stirring rods are arranged on the outer side walls of the scrapers in parallel, so that materials can be uniformly mixed, the heat of the device can be preserved, and the materials react under proper conditions.

The invention belongs to the technical field of reaction kettles, and discloses a high-efficiency polymerization reaction kettle for producing a polycarboxylic acid water reducer, the high-efficiency polymerization reaction kettle comprises a reaction kettle body, a stirring plate I and a stirring plate II, a composite rotating part is rotatably mounted in the reaction kettle body, the stirring plate I and the stirring plate II are fixedly connected to the outer surface of the composite rotating part, and the stirring plate I and the stirring plate II are fixedly connected to the outer surface of the composite rotating part. A midway injection mechanism is arranged in the composite rotating part, the composite rotating part rotates around the midway injection mechanism in the composite rotating part, and the midway injection mechanism is used for injecting the material liquid into the mixed liquid in the stirring reaction period. According to the invention, the key additive is directly sprayed to the specified depth in the reaction liquid instead of being only added on the liquid surface, so that the problem of over-high local concentration is avoided, the material can be instantly and uniformly dispersed in the reaction system, the stability and controllability of the reaction are greatly improved, the high consistency of the product performance is ensured, and the product quality is improved. Accurate, multi-point and deep injection of materials in the reaction process is achieved.

The application discloses an ethylene and alpha-olefin copolymerization evaluation test device, which comprises an olefin mixed gas distribution device, a polymerization reactor, a temperature control unit, a pressure control unit and a stirring device. The polymerization reactor is connected with the olefin mixed gas distribution device, the temperature control unit is connected with the polymerization reactor, and the pressure control unit is connected with the polymerization reactor. The stirring device comprises a stirring shaft and a stirring paddle. The stirring shaft is a hollow structure with a gas flow pipeline inside. One end of the stirring shaft penetrates through a cover of the polymerization reactor and is provided with a gas inlet. The other end of the stirring shaft is connected with the stirring paddle. The stirring paddle is arranged at the bottom of the polymerization reactor. At least one gas outlet is arranged on the stirring paddle. The ethylene and alpha-olefin copolymerization evaluation test device can increase the contact amount of ethylene and alpha-olefin with a catalyst. The ethylene and alpha-olefin copolymerization evaluation test device can be used for evaluating ethylene polymerization, and the catalyst activity can be accurately evaluated.

The invention relates to the technical field of olefin catalyst polymerization, in particular to a preparation method of ethylene propylene diene monomer. The method comprises the following steps: carrying out anhydrous oxygen operation treatment on a polymerization reaction kettle by using a vacuum-gas raw material replacement method, introducing a gas raw material prepared in proportion into the polymerization reaction kettle to achieve the required polymerization original pressure, continuously introducing a main catalyst, a cocatalyst, a hexane solvent and ethylidene norbornene into the polymerization reaction kettle at the same time, starting a polymerization reaction; and introducing circulating cooling water into an outer jacket of the polymerization reaction kettle in the reaction process to maintain the stability of the polymerization reaction temperature, inactivating the polymerization system after the polymerization reaction is finished, removing the solvent, and drying to obtain the ethylene propylene rubber. The prepared ethylene propylene diene monomer is high in stability, the molecular mass of the product is controllable, and the molecular mass distribution is obviously narrowed.

A process for preparing an ethylene polymer in a suspension polymerization including the steps of separating the formed suspension of ethylene polymer particles in a solid-liquid separator into ethylene polymer particles and mother liquor, transferring a first part of the mother liquor into a work-up section including an evaporation unit for producing a wax-depleted portion of the mother liquor, wherein a protic agent is added to the part of the mother liquor which is transferred into the work-up section, and recycling a first part of the wax-depleted portion of the mother liquor to the polymerization reactor or the series of polymerization reactors.

This invention provides a polymerization reactor for polyimide preparation, belonging to the field of polymerization reactor technology. It includes a reactor body, with an integrally cast reactor bottom and a integrally cast reactor top. A motor mounting slot is provided at the center of the bottom of the reactor bottom. Eight drainage holes are evenly spaced circumferentially on the outer wall of the reactor body. The reactor body and reactor bottom are equipped with up-and-down and in-and-outward churning components. This invention uses high-speed centrifugal force to throw the solution from the lower interior of the reactor body and guide it to different circumferential trajectories on the upper interior of the reactor body. This achieves both up-and-down churning of the solution and redistribution of the solution from the outside to the inside of the reactor body, ensuring efficient subsequent mixing and uniform mass and heat transfer.

The invention provides a hydrophilic oleophobic fluorinated ethylene propylene resin preparation device which is characterized in that a stirrer (4) is positioned in the middle of a polymerization reaction kettle (1), a heating device is arranged at the bottom of the polymerization reaction kettle (1), the polymerization reaction kettle (1) is connected with a vacuumizing device (6), and the polymerization reaction kettle (1) is communicated with a dryer (9) through a condensation barrel (7), a demulsification device and a rinsing bath (8); the dryer (9) is connected with a powder vibrating screen (10); and the powder vibrating screen (10) is communicated with a finished product storage tank (11). According to the method disclosed by the invention, a functional monomer introduced with a hydrophilic group is added into a polymerization reaction kettle to react, tetrafluoroethylene and hexafluoropropylene are added to participate in copolymerization, and finally the fluororesin powder coating is prepared by the method and the device. The fluorinated ethylene propylene resin powder coating prepared by the method and the device has hydrophilic and oleophobic characteristics, the preparation process is simple and convenient, and the production cost is low.

The utility model discloses a polymerization system for dehydration condensation reaction, which belongs to the technical field of polymer production and comprises a polymerization reaction kettle, a through hole is arranged at the top of the polymerization reaction kettle, a tower column is vertically arranged on the through hole, the tower column comprises a plurality of tower sections which are sequentially communicated from top to bottom, and fillers are arranged in the tower sections. A tower cap is arranged at the top end of the tower section located at the uppermost end of the tower column, a cooling jacket and a thermometer are arranged on the tower cap, a gas phase outlet is formed in the upper portion of the tower cap and connected with a water removal tank, a gas outlet in the top of the water removal tank is connected with a recovery device, and a vacuum pump is connected to the tail end of the recovery device in the running direction of the recovery device; the vacuum pump is connected with a PLC. By utilizing the tower column, a solvent and a monomer with high boiling points are condensed, and water and impurities with lower boiling points leave the tower column, so that the raw material waste is reduced while the reaction is promoted; a water removal tank is arranged to absorb moisture in gas, so that the moisture in the gas is prevented from condensing when residual solvents and monomers are condensed in the recovery device, and the separation effect is not influenced.

This utility model discloses a polyvinyl chloride suspension polymerization reactor, relating to the field of polymerization reactor technology. It includes an outer reactor body with a connecting frame on its annular side. A right-angle gear is rotatably connected inside the connecting frame, and a connecting block is fixedly connected to the lower surface of the connecting frame. An inner reactor body is rotatably connected inside the outer reactor body. During the stirring process, the output shaft of a servo motor drives the fixed right-angle gear to rotate. The rotation of the right-angle gear causes the inner reactor body, which is engaged with it, to rotate as well. The inner reactor body is rotatably mounted inside the outer reactor body via two fixed connecting rings. At this time, the rotation direction of the inner reactor body is opposite to that of the stirring rod. This interaction allows the materials to be subjected to forces in different directions, resulting in more thorough mixing and effectively improving the polymerization reaction effect.

The invention provides a polymerization reaction kettle. The polymerization reaction kettle comprises a kettle body; the stirring mechanism is arranged in the kettle body; the stirring mechanism comprises a stirring shaft and at least two stirring groups, the stirring shaft comprises at least two sleeve shafts which are sequentially connected in the axial direction of the kettle body, the rotating directions of every two adjacent sleeve shafts are opposite, and each sleeve shaft is at least connected with one stirring group; the stirring group comprises at least two stirring blades, and the stirring blades are arranged on the two sides of the sleeve shaft at intervals; the cooling assembly comprises at least one cooling pipe, and the cooling pipes are annularly arranged on the periphery of the stirring shaft and staggered with the stirring blades. According to the polymerization reaction kettle, the coaxial positive and negative rotation stirring groups are arranged, so that materials in the reaction kettle are more violently turbulent and are more uniformly mixed, the cooling pipes are distributed at all positions in the polymerization reaction kettle and are mutually staggered with the stirring groups, heat generated by polymerization reaction in the kettle can be effectively absorbed, the stability and the uniformity of products are ensured, and the production efficiency is improved. And the production efficiency is improved.

The invention relates to the technical field of nylon resin, and particularly provides nylon resin and a preparation method thereof. The preparation method comprises the following steps: adding a lactam monomer, an end-capping reagent, a catalyst and water into a polymerization reactor for ring-opening polymerization, and releasing pressure to normal pressure; the polymerization reactor is purged until the water content of the purged gas is smaller than 500 ppm, then an antioxidant is added, for example, the sum of the mass ratio of the end-capping reagent to the catalyst to the lactam monomer is not larger than 0.0045, the mass ratio of the lactam monomer to the antioxidant is 1: (0.0001-0.005), and otherwise, the mass ratio of the end-capping reagent to the catalyst to the antioxidant is 1: (0.0001-0.002); vacuumizing, discharging after staying, and dicing; the obtained nylon resin has few impurities, a yellow value as low as-8 to-6, molecular weight distribution of 4-5, high notch impact strength, strong toughness and excellent low temperature resistance, and can be used for automobile oil pipes and gas transportation pipelines in cold regions.

The present invention relates to a reactor for the continuous vapor phase polymerization of one or more monomers, and in particular provides a reactor which is a horizontal mechanically stirred polymerisation reactor and which includes, disposed within the reactor, an agitator which comprises a central shaft and a plurality of stirring paddles, wherein the central shaft has a diameter of 300 to 1750mm and a length of 9 to 25 meters, and each stirring paddle a) extends radially from the shaft, b) has a first surface with an area of 0.1 to 1.5 m2, and c) has a cross-section which comprises either i. a triangular cross-section, or ii. a partial ellipsoidal cross-section, or iii. a three-dimensional cross-section other than a triangular or partial ellipsoidal cross-section and which is such that in use there is no stagnant zone behind the first surface.

The utility model discloses a polyreactor for preparing polyester yarn production raw materials, which comprises a conveying driving structure, a reactor body structure is fixedly mounted above the conveying driving structure, the conveying driving structure comprises a conveying box, connecting columns are fixedly mounted on two sides of the conveying box, and a connecting block is fixedly mounted above the conveying box. A through hole is formed between the connecting blocks in a penetrating mode, a discharging pipe with a control valve is fixedly installed at the bottom of the conveying box in an inlaid mode, an auger rod is rotatably installed in the conveying box in the mode of penetrating through the connecting column, a driving gear is fixedly installed at one end of the auger rod, and a bearing frame is fixedly installed above the connecting column; and a driving motor is fixedly installed above the connecting column, meanwhile, a driving gear is installed at the output end of the driving motor in a penetrating mode, the driving gear is connected with the driving gear in a meshed mode through a chain, and according to the polymerization reaction kettle for preparing the polyester yarn production raw materials, the auger rod is arranged, so that rotary conveying is achieved.

The present disclosure provides a process. In an embodiment, the process includes introducing an antifoulant into an ethylene feed of a reactor system. The reactor system includes the ethylene feed, a hyper-compressor, a preheater and a polymerization reactor. The ethylene feed is located upstream of the hyper-compressor. The antifoulant consists of an inhibitor, molecular oxygen, and optionally a solvent. As the ethylene feed is located upstream of the hyper-compressor, the process includes introducing the antifoulant into the ethylene feed upstream of the hyper-compressor. The process further includes adding a free radical initiator to the polymerization reactor. The process further includes polymerizing the ethylene in the polymerization reactor under high pressure free-radical polymerization conditions, and forming an ethylene-based polymer.

The invention provides a polymerization reaction kettle, and belongs to the technical field of reaction kettles.The polymerization reaction kettle comprises a kettle body and a stirring shaft rotationally arranged in the kettle body, the interior of the stirring shaft is hollow, and a sleeve is arranged on the stirring shaft in a sliding mode; the material mixing mechanism comprises a plurality of groups of stirring rods arranged on the stirring shaft, the stirring rods are horizontally arranged, cavities are formed in the stirring rods, and the stirring rods are communicated with the cavities in the stirring shaft to form circulation channels; by arranging the stirring adjusting mechanism, the angle and position of the stirring component can be automatically adjusted according to the material viscosity, and when the material viscosity is increased, the vertical stirring area is automatically increased; meanwhile, the posture of the stirring component is changed through linkage of pressure change of cooling liquid, and the heat exchange area and the stirring range are enlarged. According to the design, the stirring action can sense the real-time state and spatial difference of materials in the kettle, and the problems of mixing dead angles and non-uniform heat transfer caused by a fixed stirring mode of a traditional reaction kettle are solved.

A high-pressure polymerization system having a) a polymerization reactor and b) a reactor blow down system having b1) a reactor blow down vessel, having a circular design over a major portion P having a L / D-ratio in the range from 1.75 to 10.0 and containing an aqueous quenching medium, b2) a release line connecting the polymerization reactor with the reactor blow down vessel and having an outlet located above a maximum level for the aqueous quenching medium, b3) a first emergency valve in the release line to open and close fluid communication between the polymerization reactor and the reactor blow down system, and wherein the release line outlet has a joining piece having an angle (α) between the central axis and a tangent at the reactor blow down vessel in the range from 5° to 70° and the reactor blow down vessel has a vent stack containing a constricted section.

This invention provides a polymerization reactor for vinyl polyolefin elastomers and its application. The polymerization reactor includes a reaction vessel and a heat exchange jacket fitted onto the outer wall of the reaction vessel. The inner wall of the reaction vessel is provided with continuous spiral ribs or continuous spiral grooves, and its surface has a smooth transition structure without sharp corners or dead angles. This invention also discloses the application of this polymerization reactor in the polymerization of vinyl polyolefin elastomers. This invention significantly improves heat transfer efficiency by increasing the heat exchange area through the continuous spiral structure, disrupting the near-wall thermal boundary layer, and inducing local vortices. The spiral structure, together with the guide tube, guide holes, and baffles, forms a multi-stage synergistic system, optimizing the flow field inside the reactor and achieving beneficial effects such as improved heat transfer efficiency, reduced cooling water consumption, stable temperature control, and excellent anti-sticking effect. It is suitable for continuous or batch polymerization production of vinyl polyolefin elastomers.

A slurry flow valve may be used to control flow in a gas phase polymerization reactor. For example, a system may include at least three injection nozzles in fluid connection with a gas phase polymerization reactor, where the at least three injection nozzles are configured to carry a modified catalyst slurry; at least three lines connected to the at least three injection nozzles, wherein the at least three lines include a first line connected to a first injection nozzle, a second line connected to a second injection nozzle, and a third line connected to a third injection nozzle; and at least three slurry flow valves in contact with the at least three lines, wherein the at least three slurry flow valves include a first slurry flow valve, a second slurry flow valve, and a third slurry flow valve. Preferably, each valve may be independently controlled to regulate flow therethrough.

The application belongs to the technical field of polymer synthesis, and particularly relates to a preparation method of a methacrylic acid polymer, which comprises the following steps: feeding polymerization monomers, a chain transfer agent and an initiator into a polymerization reactor, and performing a polymerization reaction in the polymerization reactor; the polymerization reaction temperature is 200-260 DEG C; the polymerization reactor is a loop reactor; there is no gas phase in the polymerization reactor; the flow rate of the reaction liquid in the polymerization reactor is 0.2-0.8 m / s; and the polymer concentration at the outlet of the polymerization reactor is 70-85 wt%. The loop reactor is used, a series of operation conditions are set, and a product with high polymerization conversion rate is obtained. By controlling the polymerization reaction temperature, the reaction liquid viscosity is effectively reduced, the occurrence probability of gel effect is reduced, the polymerization conversion rate is improved, and the polymer concentration at the outlet of the polymerization reactor is 70 wt%-85 wt%.

This invention discloses a method and system for the continuous production of long-chain polyamides. The method includes: (1) feeding a diacid and a diamine into a prepolymerization reactor for a prepolymerization reaction, wherein the prepolymerization reactor is a horizontal screw reactor; (2) evaporating and dehydrating the product of the prepolymerization reaction; and (3) the output from step (2) entering a final polymerization reactor for continuous final polycondensation. The long-chain polyamides prepared by this method and system have a narrow molecular weight distribution, low viscosity, and stable performance. In particular, compared with batch methods, the process has a high degree of automation and high production efficiency.

This invention provides a waste heat utilization device and process for the production of long-chain nylon resin. The waste heat utilization device includes a polymerization reactor, an evaporator, a steam manifold, and a hot water circulation system. The hot water circulation system includes a hot water storage tank and a hot water circulation pump. The polymerization reactor is connected to the inlet of the hot water storage tank via an exhaust pipe to the hot water storage tank and to the inlet of the evaporator via an exhaust pipe to the evaporator. The outlet of the evaporator is connected to the steam manifold via an inlet pipe. The steam manifold is connected to the steam user end via a steam pipeline to the steam network. The outlet of the hot water storage tank is connected to the hot water user end via the hot water circulation pump and a hot water pipeline. This invention uses the steam discharged during the polymerization process as a heat medium to heat deionized water to obtain saturated steam and hot water, which are then supplied to the factory's steam and hot water users. This fully utilizes the waste heat from the polymerization process, reduces the factory's steam consumption, and lowers production energy consumption.

The invention provides slurry discharging equipment with a purging device and a polymerization reactor. The slurry discharging equipment with the purging device comprises a flange, a ball valve, a discharging pipe and the purging device, the flange is provided with a flange opening, and the axis of the flange opening is perpendicular to the horizontal plane. The flange is provided with a purging channel penetrating through the inner side face and the outer side face of the flange. The ball valve is connected with the bottom surface of the flange and is provided with a ball valve inlet and a ball valve outlet, and the ball valve inlet is communicated with the flange; the discharge pipe is arranged below the ball valve and is communicated with an outlet of the ball valve; the purging device is provided with at least one purging pipeline; and at least one purging pipeline is connected with the purging channel. The purging channel is formed in the flange, so that the interior of the polymerization reactor can be purged, and a dead zone is avoided as much as possible; a plunger valve in the prior art is replaced with the ball valve, and the problems that the plunger valve is prone to damage, and the top face of the plunger valve needs to be machined into a special-shaped face are solved.

This invention relates to a process for feeding a polymerization catalyst into a polymerization reactor, the process comprising the following steps: (i) forming a catalyst slurry comprising oil and solid catalyst components in a first catalyst preparation container; (ii) conveying the catalyst slurry from the first catalyst preparation container to a first catalyst feed container; (iii) maintaining the catalyst slurry in the first catalyst feed container in a homogeneous state; (iv) discharging a portion of the catalyst slurry from the first catalyst feed container, preferably continuously discharging the catalyst slurry from the first catalyst feed container, and introducing the discharged portion of the catalyst slurry into the polymerization reactor; wherein, when located within the first catalyst preparation container and the first catalyst feed container, the dynamic viscosity of the oil is 25 to 1500 mPa*s; wherein the catalyst slurry is conveyed from the first catalyst feed container downward along a substantially vertical path into the polymerization reactor.

The application relates to the technical field of polyester fiber production, and discloses a power dispatching optimization method and system for industrial production, which are used for a polyester fiber direct spinning production line. The method comprises the following steps: calculating a characteristic viscosity qualified interval of polyester fiber melt; collecting process parameter data flow of a polymerization reactor in the polyester fiber direct spinning production line; calculating a basic power demand curve and a power regulation margin; collecting real-time state data of a spinning beam in the polyester fiber direct spinning production line; calculating minimum power demand and an interruptible time window set of the spinning beam; calculating a working instruction set of the polymerization reactor and the spinning beam in a preset dispatching period so as to minimize the production cost of the polyester fiber direct spinning production line; and dispatching the polymerization reactor and the spinning beam to work so as to produce the polyester fiber melt. The application not only solves the technical problem that quality guarantee and power saving cannot be considered simultaneously in polyester fiber direct spinning production, but also provides a general power-process collaborative optimization paradigm.

The present invention provides a reactor-blended ethylene polymer composition comprising at least two identifiable components having different structural and compositional properties, namely a first ethylene polymer and a second ethylene copolymer. The ethylene polymer composition is produced by a continuous solution polymerization process, wherein the first ethylene polymer is formed by polymerizing ethylene and optionally at least one α-olefin in a first solution polymerization reactor using a first homogeneous catalyst composition, and the second ethylene copolymer is formed by polymerizing ethylene and at least one α-olefin in a second solution polymerization reactor using a second homogeneous catalyst composition. The ethylene polymer composition of the present invention can be advantageously used in applications where an easily openable single-material packaging system is required.