Production reaction kettle and method for polymerizing polyethylene glycol into high molecular weight

Abstract

The invention provides a production reaction kettle and method for polymerizing polyethylene glycol into high molecular weight, and belongs to the technical field of polyethylene glycol production. Comprising a kettle body, a catalyst pipeline is inserted into the top of the kettle body, one side of the catalyst pipeline is fixedly connected with an adjusting assembly, the adjusting assembly is used for assisting in adjusting the adding speed of a catalyst, and the adjusting assembly is connected with the catalyst pipeline; the observation assembly is used for conveniently observing the total adding amount of the catalyst, and the observation assembly is connected with the catalyst pipeline. By arranging the adjusting assembly and the observation assembly, the adjusting assembly not only can realize feeding of a quantitative catalyst, but also can control the speed of adding the catalyst into the reaction kettle when the catalyst is added; the observation assembly can visually observe whether the catalyst reaches a quantitative value or not, the opening size of the opened channel can be adjusted, the adjustment requirements of different production working conditions can be met, and the problem of reaction unbalance caused by the fixed speed is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyethylene glycol production, in particular to a polymerization high molecular weight production reactor and method for polyethylene glycol. BACKGROUND

[0002] The polymerization high molecular weight production reactor for polyethylene glycol is a special equipment for polyethylene glycol high molecular weight polymerization, which can precisely control reaction conditions such as temperature, pressure and stirring rate, provide a stable environment for ethylene oxide ring-opening polymerization, inhibit side reactions, realize monomer gradual addition, improve polymer molecular weight and distribution uniformity, guarantee product performance, and the manual weighing of aluminum isopropyl alcohol in polyethylene glycol polymerization production is no longer universal. In large-scale and modern production enterprises, automatic feeding and weighing equipment has been applied, but some small and medium-sized enterprises or traditional production lines may still use manual weighing.

[0003] For example, the Chinese patent with publication number CN218485926U discloses a polymerization production device for polyethylene glycol, which includes a reactor body, a feeding pipe fixedly connected to the top of the reactor body, a buffer fixedly connected to the top of the feeding pipe, and a dosing pipe fixedly connected to one end of the buffer through the feeding pipe. This device can replace manual weighing and feeding operations, greatly reducing the workload of workers and saving time. It also realizes precise dosing of catalysts, avoids manual operation errors, and ensures the stability of polyethylene glycol polymerization reaction and the uniformity of product quality.

[0004] In the above technical solution, although manual weighing and feeding operations are replaced and precise dosing of catalysts is realized, this method of adding catalysts cannot control the speed of adding aluminum isopropyl alcohol as a catalyst into the reactor body, which may damage the stability of polyethylene glycol polymerization reaction. Fast feeding can easily cause local high concentration of catalysts, leading to a sudden increase in the rate of ethylene oxide ring-opening polymerization, local heat concentration, wide product molecular weight distribution, and purity reduction. It also promotes the occurrence of side reactions, generates aluminum oxide impurities and gel, and causes the temperature and pressure in the reactor to fluctuate sharply. This not only reduces the activity of the catalyst, but also impacts the sealing structure, increases the safety hazards of ethylene oxide leakage, increases the difficulty of subsequent purification and cleaning, and causes the production cost to rise and the production efficiency to decrease. Therefore, based on the above problems, the present application provides a polymerization high molecular weight production reactor and method for polyethylene glycol to meet the needs. SUMMARY

[0005] The technical problem solved by the present application is to provide a production reaction kettle and method for polymerization of polyethylene glycol into high molecular weight, by setting an adjusting assembly and an observation assembly, the adjusting assembly can not only realize quantitative catalyst feeding, but also control the speed of adding the reaction kettle when the catalyst is added; the observation assembly can directly observe whether the catalyst reaches the quantitative value, and can adjust the opening size of the opened channel, which can adapt to the adjustment needs of different production conditions, avoid the reaction imbalance problem caused by fixed speed, and solve the problem that the existing manual weighing method of adding catalyst cannot control the speed of adding the catalyst into the reaction kettle body.

[0006] To solve the above technical problems, the present application provides the following technical solutions: A production reaction kettle for polymerization of polyethylene glycol into high molecular weight, comprising a kettle body, a catalyst pipeline is inserted into the top of the kettle body, an adjusting assembly is fixedly connected to one side of the catalyst pipeline, the adjusting assembly is used to assist in adjusting the catalyst addition speed, and the adjusting assembly is connected with the catalyst pipeline; an observation assembly is used to facilitate observation of the total amount of catalyst added, and the observation assembly is connected with the catalyst pipeline.

[0007] Optionally, an upper and lower corresponding operation groove is formed in one side of the catalyst pipeline, a through groove and a switch groove are formed in the inner wall of the operation groove, and the through groove and the switch groove are both in communication with the inside of the catalyst pipeline.

[0008] Optionally, the adjusting assembly comprises a rotating shaft fixedly connected to the inner wall of the switch groove, a guide plate is rotatably connected to the rotating shaft, one end of the guide plate is fixedly connected with a protruding block, a hanging hook is rotatably connected to one side of the protruding block close to the rotating shaft, an elastic sheet is fixedly connected to the top of the guide plate, a limiting block is fixedly connected to the bottom of the guide plate, a sealing sleeve is fixedly connected to the outer wall of the guide plate, and the top and bottom of the sealing sleeve are fixedly connected with the inner wall of the switch groove.

[0009] Optionally, an avoidance groove is formed in one side of the protruding block corresponding to the position of the hanging hook, and the inner wall size of the avoidance groove is greater than the thickness size of the hanging hook.

[0010] Optionally, the hanging hook has a structure in which the width size gradually decreases from top to bottom, and the bottom of the hanging hook is provided with an upward bending angle.

[0011] Optionally, the elastic sheet has a curved elastic structure, and a uniform distribution of weakening grooves is formed in one side of the elastic sheet.

[0012] Optionally, a folding groove is formed in the top of the switch groove corresponding to the position of the elastic sheet, and the inner wall size of the folding groove is greater than the thickness size of the elastic sheet.

[0013] Optionally, the observation assembly comprises an observation window fixedly connected to the top of the inner wall of the operation groove, the bottom of the observation window is a downward inclined structure, the inner wall of the observation window is communicated with the through groove, the observation window is made of transparent material, the outer contour of the observation window protrudes from the outer wall of the catalyst pipeline, and the outer contour of the observation window does not contact the guide plate.

[0014] Optionally, a plurality of matching grooves are uniformly arranged on the operation groove, the inner wall of the matching groove is larger than the outer contour size of the bottom of the hanging hook, and the cross section of the matching groove is a right-angle bending structure.

[0015] The application also provides a method for polymerization of polyethylene glycol into a high molecular weight production reactor, comprising the following steps: Step one, feeding and preparing reaction: adding gasoline as a reaction medium into the high molecular weight polymerization reactor; Step two, catalytic polymerization: adding aluminum isopropyl alcohol catalyst under stirring, and introducing ethylene oxide and ethylene glycol raw materials to complete stepwise addition polymerization; Step three, purifying and obtaining product: after the reaction is completed, the reaction is transferred to a distillation kettle, the medium and unreacted raw materials are separated, and the polyethylene glycol product is prepared.

[0016] Compared with the prior art, the application has at least the following beneficial effects: In the above scheme, by setting the adjusting assembly and the observation assembly, the adjusting assembly can control the opening size of the catalyst pipeline channel and close the channel, and the cooperation of the upper and lower adjusting assemblies can not only realize the quantitative feeding of the catalyst, but also control the feeding speed into the reaction kettle when the catalyst is added; the observation assembly can directly observe whether the catalyst reaches the quantitative value, and then sequentially close the upper adjusting assembly and open the lower adjusting assembly, and the opening size of the channel can be adjusted to adapt to the adjustment requirements of different production conditions, thereby avoiding the problem of reaction imbalance caused by fixed speed.

[0017] By setting the guide plate, the hanging hook and the matching groove, the hanging hook cooperates with the matching grooves at different positions to adjust the inclination angle of the other end of the guide plate inside the catalyst pipeline, thereby controlling the opening size of the channel inside the catalyst pipeline, and in the catalyst feeding stage, the small opening size of the channel can realize low-speed uniform feeding and prevent local catalyst aggregation.

[0018] By setting the elastic sheet and the sealing sleeve, the bending position of the elastic sheet in the weakening groove is thinned, which makes the elastic sheet more easily bend and deform under the action of external force, and the sealing sleeve can enhance the ring stiffness and compression resistance of the sealing sleeve by its own corrugated structure, and also give the sealing sleeve certain flexibility, and ensure that the catalyst will not leak at the opening and closing groove. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the relevant art to make and use the application.

[0020] Figure 1 First perspective view of the production reactor for the polymerization of polyethylene glycol into high molecular weight; Figure 2 Second perspective view of the production reactor for the polymerization of polyethylene glycol into high molecular weight; Figure 3 is Figure 2 Enlarged perspective view of position A in FIG. 1; Figure 4 Perspective view of the adjusting assembly; Figure 5 First perspective view of the catalyst pipeline; Figure 6 is Figure 5 Enlarged perspective view of position B in FIG. 2; Figure 7 First perspective view of the catalyst pipeline; Figure 8 is Figure 7 Enlarged perspective view of position C in FIG. 3; Figure 9 Second perspective view of the catalyst pipeline; Figure 10 is Figure 9 Enlarged perspective view of position D in FIG. 4; Figure 11 Second perspective view of the catalyst pipeline; Figure 12 is Figure 11 Enlarged perspective view of position E in FIG. 5.

[0021] Reference signs: 1, kettle body; 2, catalyst pipeline; 3, operation groove; 4, switch groove; 5, guide plate; 6, convex block; 7, suspension hook; 8, avoidance groove; 9, limiting block; 10, matching groove; 11, elastic sheet; 12, weakening groove; 13, rotating shaft; 14, sealing sleeve; 15, through groove; 16, observation window; 17, folding groove.

[0022] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0023] The polyethylene glycol polymerization high molecular weight production reaction kettle and method provided by the present application will be described in detail below in combination with the drawings and specific embodiments. It should be noted that in order to make the embodiments more detailed, the following embodiments are the best, preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0024] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize this feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0025] Generally, the terms can be understood at least in part from the use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics that are combinable into one or more instances. In addition, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but can instead, depending at least in part on the context, allow for the existence of other factors that are not necessarily explicitly described.

[0026] It is to be understood that the terms "on," "over," and "above" in the context of the present application are to be interpreted in the broadest reasonable manner such that "on" not only means "directly on" but also includes the meaning of "on" with intervening features or layers therebetween, and "over" or "above" not only means "over" or "above" but also can include the meaning of "over" or "above" with no intervening features or layers therebetween.

[0027] In addition, spatially relative terms, such as "beneath", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein can similarly be interpreted accordingly.

[0028] As Figures 1 to 12As shown, the embodiment of the application provides a production reactor for the polymerization of polyethylene glycol into high molecular weight, which comprises a reactor body 1, a catalyst pipeline 2 is inserted into the top of the reactor body 1, an adjusting assembly is fixedly connected to one side of the catalyst pipeline 2, the adjusting assembly is used to assist in adjusting the catalyst addition speed, the adjusting assembly is connected with the catalyst pipeline 2; an observation assembly is used to facilitate observation of the total amount of catalyst added, the observation assembly is connected with the catalyst pipeline 2, an upper and lower corresponding operation groove 3 is formed in one side of the catalyst pipeline 2, a through groove 15 and a switch groove 4 are formed in the inner wall of the operation groove 3, and the through groove 15 and the switch groove 4 are both in communication with the inside of the catalyst pipeline 2. The production reactor for the polymerization of polyethylene glycol into high molecular weight and the method provided by the application are suitable for the processing procedures of part of small and medium-sized enterprises or traditional production lines. Some existing small and medium-sized polyethylene glycol production enterprises are still using manual weighing of isopropyl aluminum and then adding it into the reactor due to the limitation of factors such as funds and production line transformation difficulty, and the automatic feeding and weighing equipment has not been introduced. By using the device, the manual weighing operation can be solved, and the speed of the catalyst added into the reactor body 1 can be adjusted and controlled. The working principle of the production reactor for the polymerization of polyethylene glycol into high molecular weight is disclosed as prior art, so it will not be described in detail. In the actual product, polyethylene glycol is a high molecular polymer which is formed by the step-by-step addition polymerization of ethylene oxide and ethylene glycol. It has no irritation, slightly bitter taste, good water solubility, and good phase solubility with many organic components. There are many synthesis methods, one of which is a high molecular weight polyethylene glycol production reactor. Ethylene glycol is used as a starter, isopropyl aluminum is used as a catalyst, nitrogen gas is passed to build an inert atmosphere, then solvents, catalysts and ethylene oxide are sequentially added, precise temperature control (10-20℃ in the initial stage and 50-80℃ in the later stage) is realized through a jacket, high-power stirring is used to ensure mixing, ring-opening polymerization of ethylene oxide is initiated, the reaction is terminated when the molecular chain reaches the target length, and stable synthesis of high molecular weight products is realized.

[0029] By setting the adjusting assembly and the observation assembly, the adjusting assembly can control the opening size of the catalyst pipeline 2 channel and close the channel. The cooperation of the upper and lower two adjusting assemblies can not only realize the quantitative addition of catalyst, but also control the speed of adding the reactor when the catalyst is added. The observation assembly can directly observe whether the catalyst reaches the quantitative value, then sequentially close the upper adjusting assembly and open the lower adjusting assembly, and can adjust the opening size of the opened channel, which can adapt to the adjustment requirements of different production conditions and avoid the problem of reaction imbalance caused by fixed speed.

[0030] As an embodiment in the present embodiment, as shown in Figures 1 to 12As shown, the adjustment assembly includes a rotating shaft 13 fixedly connected to the inner wall of the switch slot 4. A guide plate 5 is rotatably connected to the rotating shaft 13. A protrusion 6 is fixedly connected to one end of the guide plate 5. A suspension hook 7 is rotatably connected to the side of the protrusion 6 near the rotating shaft 13. The suspension hook 7 has a structure where the width gradually decreases from top to bottom. The bottom of the suspension hook 7 is provided with an upward bending angle. A clearance groove 8 is provided on one side of the protrusion 6 corresponding to the position of the suspension hook 7. The inner wall dimension of the clearance groove 8 is larger than the thickness dimension of the suspension hook 7. An elastic sheet 11 is fixedly connected to the top of the guide plate 5. The elastic sheet 11 has a curved elastic structure. A uniformly distributed weakening groove 12 is provided on one side of the elastic sheet 11. A limit block 9 (such as...) is fixedly connected to the bottom of the guide plate 5. Figures 1 to 4 As shown), a sealing sleeve 14 is fixedly connected to the outer wall of the guide plate 5. The top and bottom of the sealing sleeve 14 are fixedly connected to the inner wall of the switch groove 4. A folding groove 17 is provided at the top of the switch groove 4 corresponding to the position of the elastic sheet 11. The inner wall dimension of the folding groove 17 is larger than the thickness dimension of the elastic sheet 11.

[0031] Specifically, reactor body 1 is equipped with a jacketed temperature control system to meet the high and low temperature requirements of polymerization. A stirring system is installed at the top of reactor body 1 to ensure proper mixing of materials (e.g., ...). Figures 1 to 2 As shown, the specific structure and working principle of the vessel body 1 are disclosed as prior art and will not be elaborated further. The catalyst pipeline 2 serves as the channel for adding the catalyst. Two sets of adjustment components are installed on the catalyst pipeline 2, one upper and one lower. Each set of adjustment components can be manually adjusted to control whether the catalyst pipeline 2 is open or closed, and the size of the opening. The distance between the two sets of adjustment components can be determined based on the inner wall dimensions of the catalyst pipeline 2 and the quantitative value of the catalyst. This ensures that when the upper and lower guide plates 5 are kept horizontal, the catalyst capacity between the guide plates 5 is consistent with the required quantitative value of the catalyst. When catalyst needs to be added, the lower guide plate 5 is first rotated around the central axis of the rotating shaft 13 until the other end of the guide plate 5 is horizontal and in contact with the inner wall of the catalyst pipeline 2. The elastic sheet 11 is squeezed into the folded groove 17, the bottom of the suspension hook 7 contacts the inner wall of the lowest mating groove 10, one end of the guide plate 5 is attached to the inner wall of the operating groove 3, and the outer contour of the suspension hook 7 is attached to the inner wall of the clearance groove 8, so that the lower adjustment component is in the state of closing the internal channel of the catalyst pipeline 2. Then, the upper guide plate 5 is rotated around the central axis of the rotating shaft 13 until the other end of the guide plate 5 is in a downward tilted state, and the limiting block 9 is in contact with the inner wall of the switching groove 4 and the catalyst pipeline 2 respectively. At this time, the elastic sheet 11 is not squeezed, the bottom of the suspension hook 7 is in contact with the inner wall of the uppermost mating groove 10, one end of the guide plate 5 forms a triangular relationship with the inner wall of the operating groove 3 and the suspension hook 7, and the outer contour of the suspension hook 7 separates from the inner wall of the clearance groove 8, so that the upper adjustment component is in the state of opening the internal channel of the catalyst pipeline 2 (e.g.Figures 5 to 8 The bottom of the hanging hook 7 is matched with the matching groove 10 at different positions, which can change the inclination angle of the other end of the flow guide plate 5, so as to adjust the size of the passage opening of the inner wall of the catalyst pipeline 2.

[0032] By setting the flow guide plate 5, the hanging hook 7 and the matching groove 10, the hanging hook 7 is matched with the matching groove 10 at different positions, so as to adjust the inclination angle of the other end of the flow guide plate 5 inside the catalyst pipeline 2, and then control the size of the passage opening inside the catalyst pipeline 2. In the catalyst feeding stage, the passage opening is adjusted to be small, which can realize uniform feeding at low speed and prevent local catalyst accumulation.

[0033] As an embodiment in the present embodiment, as shown in Figures 1 to 12 The observation assembly includes an observation window 16 fixedly connected to the top of the inner wall of the operation groove 3. The bottom of the observation window 16 is downwardly inclined. The inner wall of the observation window 16 is penetrated by the through groove 15. The observation window 16 is made of transparent material. The outer contour of the observation window 16 protrudes from the outer wall of the catalyst pipeline 2. The outer contour of the observation window 16 does not contact the flow guide plate 5. The matching groove 10 is uniformly distributed on the operation groove 3. The inner wall size of the matching groove 10 is greater than the outer contour size of the bottom of the hanging hook 7. The cross section of the matching groove 10 is a right-angled bending structure.

[0034] Further, then the catalyst is added from the catalyst feeding port. The catalyst flows through the upper flow guide plate 5 and then flows to the lower flow guide plate 5 for accumulation. When the catalyst flows to the inner wall of the observation window 16, it represents that the catalyst capacity between the upper and lower flow guide plates 5 has reached a quantitative value. Since the bottom of the observation window 16 is inclined and the observation window 16 is made of transparent material, it is convenient to observe the situation of the catalyst inside the observation window 16. Then, the upper flow guide plate 5 is prepared to be rotated to be horizontal at the other end of the upper flow guide plate 5. The bottom of the upper hanging hook 7 is separated from the matching groove 10. Then the hanging hook 7 is pulled downward. One end of the flow guide plate 5 is driven, so that the flow guide plate 5 starts to rotate around the rotating shaft 13, and then the elastic sheet 11 is pressed. The elastic sheet 11 is easily pressed under the action of the weakening groove 12. When the bottom of the hanging hook 7 is matched with the lowermost matching groove 10, the other end of the flow guide plate 5 is horizontal (as shown in Figures 9 to 12As shown in the figure), the flow guide plate 5 is used to block the catalyst, and then the lower flow guide plate 5 is switched to an open state, the cooperation of the hanging hook 7 and the cooperation groove 10 in different positions is adjusted as required, the addition speed of the catalyst is controlled, the adjustment requirement of different production conditions is adapted, the sealing sleeve 14 can be always in a fixed connection state with the flow guide plate 5 when rotating at one end of the flow guide plate 5, the outer wall of the sealing sleeve 14 is corrugated, the corrugated structure of the sealing sleeve 14 is used to enhance the ring stiffness and pressure resistance of the sealing sleeve 14, and also to give the sealing sleeve 14 certain flexibility, so that the catalyst cannot leak at the switch groove 4.

[0035] By setting the elastic sheet 11 and the sealing sleeve 14, the bending position of the elastic sheet 11 is thinned, so that the elastic sheet 11 is more easily bent and deformed under the action of external force, the sealing sleeve 14 can utilize the corrugated structure to enhance the ring stiffness and pressure resistance of the sealing sleeve 14, and also to give the sealing sleeve 14 certain flexibility, so that the catalyst cannot leak at the switch groove 4.

[0036] The application also provides a method for polymerization of polyethylene glycol into a high molecular weight production reaction kettle, comprising the following steps: Step one, material preparation: adding gasoline as a reaction medium into the high molecular weight polymerization reaction kettle; Step two, catalytic polymerization: adding aluminum isopropyl alcohol catalyst under stirring, and introducing ethylene oxide and ethylene glycol raw materials to complete stepwise addition polymerization; Step three, product purification: after the reaction is completed, the reaction kettle is transferred to a distillation kettle, the medium and unreacted raw materials are separated, and the polyethylene glycol product is prepared.

[0037] The working principle of the technical scheme provided by the application is as follows: When the catalyst needs to be added, first rotate the lower guide plate 5 around the central axis of the rotating shaft 13 to the other end of the guide plate 5 to be horizontal, and the other end of the guide plate 5 is in contact with the inner wall of the catalyst pipeline 2. At this time, the elastic sheet 11 is pressed into the folding groove 17, the bottom of the hanging hook 7 is in contact with the inner wall of the lowest cooperation groove 10, one end of the guide plate 5 is in contact with the inner wall of the operation groove 3, and the outer contour of the hanging hook 7 is in contact with the inner wall of the avoidance groove 8, so that the lower adjustment assembly is in a state of closing the internal passage of the catalyst pipeline 2. Then rotate the upper guide plate 5 around the central axis of the rotating shaft 13 to the other end of the guide plate 5 to be downward inclined, and the limiting block 9 is in contact with the switch groove 4 and the inner wall of the catalyst pipeline 2 respectively. At this time, the elastic sheet 11 is not pressed, the bottom of the hanging hook 7 is in contact with the inner wall of the uppermost cooperation groove 10, one end of the guide plate 5 forms a triangular relationship between the inner wall of the operation groove 3 and the hanging hook 7, and the outer contour of the hanging hook 7 is separated from the inner wall of the avoidance groove 8, so that the upper adjustment assembly is in a state of opening the internal passage of the catalyst pipeline 2. The bottom of the hanging hook 7 cooperates with the cooperation groove 10 at different positions to change the inclination angle of the other end of the guide plate 5, thereby adjusting the opening size of the passage of the inner wall of the catalyst pipeline 2, and then adding the catalyst from the catalyst feeding port. The catalyst flows through the upper guide plate 5 and then flows to the lower guide plate 5 for accumulation. When the catalyst flows to the inner wall of the observation window 16, it represents that the catalyst capacity between the upper and lower guide plates 5 has reached a quantitative value. Since the bottom of the observation window 16 is inclined and the observation window 16 is made of transparent material, the situation of the catalyst inside the observation window 16 can be observed conveniently. Then prepare to rotate the upper guide plate 5 to the other end of the upper guide plate 5 to be horizontal. First, separate the bottom of the upper hanging hook 7 from the cooperation groove 10, then pull down the hanging hook 7, one end of the guide plate 5 is driven, so that the guide plate 5 starts to rotate around the rotating shaft 13, then press the elastic sheet 11. Under the action of the weakening groove 12, the elastic sheet 11 is easily pressed. When the bottom of the hanging hook 7 cooperates with the lowest cooperation groove 10, the other end of the guide plate 5 is in a horizontal state. The guide plate 5 is used to block the catalyst, and then the lower guide plate 5 is switched to the passage opening state. Adjust the cooperation between the hanging hook 7 and the cooperation groove 10 at different positions to control the addition speed of the catalyst. By using the device, the opening size of the passage of the catalyst pipeline 2 can be controlled, and the cooperation between the upper and lower guide plates 5 can not only realize the quantitative addition of the catalyst, but also control the addition speed to the reaction kettle when the catalyst is added. Whether the catalyst reaches the quantitative value can be observed directly, and then the upper guide plate 5 is closed and the lower guide plate 5 is opened in turn, and the opening size of the opened passage can be adjusted, which can adapt to the adjustment requirements of different production conditions and avoid the problem of reaction imbalance caused by fixed speed.

[0038] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0039] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A reactor for polymerization of polyethylene glycol to high molecular weight production, comprising a reactor body, a catalyst line is inserted into the top of the reactor body, characterized in that, One side of the catalyst pipeline is fixedly connected with an adjusting assembly, which is used for assisting in adjusting the adding speed of the catalyst, and is connected with the catalyst pipeline; An observation assembly is arranged, which is used for conveniently observing the total amount of the catalyst added, and is connected with the catalyst pipeline.

2. The polymerization reactor for the production of high molecular weight polyethylene glycol as claimed in claim 1 wherein, An operating groove corresponding to the upper and lower sides of the catalyst pipeline is arranged on one side of the catalyst pipeline, and a through groove and an on-off groove are arranged on the inner wall of the operating groove, both of which are in communication with the inside of the catalyst pipeline.

3. The polymerization reactor for the production of high molecular weight polyethylene glycol as claimed in claim 2, wherein, The adjusting assembly comprises a rotating shaft fixedly connected to the inner wall of the on-off groove, a flow guide plate rotatably connected to the rotating shaft, a protruding block fixedly connected to one end of the flow guide plate, a hanging hook rotatably connected to the side of the protruding block close to the rotating shaft, an elastic sheet fixedly connected to the top of the flow guide plate, a limiting block fixedly connected to the bottom of the flow guide plate, and a sealing sleeve fixedly connected to the outer wall of the flow guide plate, the top and bottom of the sealing sleeve being fixedly connected to the inner wall of the on-off groove.

4. The polymerization reactor for the production of high molecular weight polyethylene glycol as claimed in claim 3, wherein, An avoiding groove is arranged on the side of the protruding block corresponding to the position of the hanging hook, and the inner wall of the avoiding groove has a size greater than the thickness of the hanging hook.

5. The polymerization reactor for the production of high molecular weight polyethylene glycol as claimed in claim 3 wherein, The hanging hook has a structure with a width gradually decreasing from top to bottom, and the bottom of the hanging hook is provided with an upwardly curved angle.

6. The polymerization reactor for the production of high molecular weight polyethylene glycol as claimed in claim 3 wherein, The elastic sheet has a curved surface elastic structure, and a plurality of evenly distributed weakening grooves are arranged on one side of the elastic sheet.

7. The polymerization reactor for the production of high molecular weight polyethylene glycol as claimed in claim 3 wherein, A folding groove is arranged on the top of the on-off groove corresponding to the position of the elastic sheet, and the inner wall of the folding groove has a size greater than the thickness of the elastic sheet.

8. The polymerization reactor for the production of high molecular weight polyethylene glycol as claimed in claim 3 wherein, The observation assembly comprises an observation window fixedly connected to the top of the inner wall of the operating groove, the bottom of the observation window has a downwardly inclined structure, the inner wall of the observation window is in communication with the through groove, the observation window as a whole is made of transparent material, the outer contour of the observation window protrudes from the outer wall of the catalyst pipeline, and the outer contour of the observation window is not in contact with the flow guide plate.

9. The polymerization reactor for the production of high molecular weight polyethylene glycol as claimed in claim 8, wherein, A plurality of evenly distributed matching grooves are arranged on the operating groove, the inner wall of the matching groove has a size greater than the outer contour size of the bottom of the hanging hook, and the cross section of the matching groove has a right-angled bending structure.

10. The process for the polymerization of polyethylene glycol to high molecular weight production reactor as claimed in any one of claims 1 to 9 wherein, The method comprises the following steps: Step one, material preparation: gasoline is added to a high molecular weight polymerization reactor as a reaction medium; Step two, catalytic polymerization: under stirring, aluminum isopropoxide catalyst is added, and ethylene oxide and ethylene glycol raw materials are introduced to complete stepwise addition polymerization; Step three, product purification: after the reaction is completed, the reaction mixture and unreacted raw materials are separated in a distillation kettle to obtain polyethylene glycol.

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