An alkylene oxide ring-opening reaction apparatus

Abstract

The application provides an alkylene oxide ring-opening reaction device, comprising a reaction unit, a first circulation unit, a second circulation unit and a control unit. The alkylene oxide ring-opening reaction device provided by the application controls the feeding amount of the alkylene oxide ring-opening reaction device in different reaction stages through the setting of two different circulation units, so as to controllably prepare a target product, and through the setting of the control unit, the alkylene oxide delivery flow can be dynamically adjusted based on the total pressure and the safety pressure, so that the alkylene oxide concentration is always below the ignition concentration corresponding to the pressure condition, thereby ensuring the intrinsic safety of the production process.

Description

Technical Field

[0001] This application belongs to the field of alkoxylation production process technology, and in particular relates to an apparatus for ring-opening reaction of epoxide alkane. Background Technology

[0002] Alkoxylation is a ring-opening polymerization reaction involving an active hydrogen-containing initiator and an epoxide alkane under the action of a catalyst. The product obtained from this reaction can be called an alkoxylated product. Alkoxylated products are widely used in construction, daily chemicals, coatings, textile printing and dyeing, agricultural emulsions, rubber, and other fields.

[0003] In the production of high molecular weight polyethers in batch reactors, setting the feed rate for products with different molecular weights is a crucial step in ensuring reaction controllability and product quality. The alkyl oxides used in alkoxylation reactions are typically flammable and explosive, such as ethylene oxide and propylene oxide. When the concentration of alkyl oxides in the gas phase space within the reaction assembly reaches its ignition point, there is a risk of combustion and explosion. Therefore, controlling the concentration of alkyl oxides in the gas phase space of the reaction assembly to ensure that the concentration remains below its ignition point throughout the entire alkoxylation reaction, thereby guaranteeing the safety of the reaction process and the controllable preparation of the target product, has become a pressing technical problem to be solved in this field. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this application provides an apparatus for the ring-opening reaction of alkyl epoxides that ensures the safety of the reaction process and the controllable preparation of the target product.

[0005] This application provides an apparatus for a ring-opening reaction of alkyl oxidoxides, which may include: The reaction unit includes: The reactor, wherein the reactor is provided with an alkylene oxide inlet, a second circulating material inlet, and a first outlet; and The collector is provided with a first inlet, a first circulating material inlet, a first circulating material outlet, and a second circulating material outlet; The first outlet of the reactor is in fluid communication with the first inlet of the collector; The first loop unit includes: First circulation pump; and First heat exchanger; The first circulating pump is connected to the first circulating material outlet of the collector and the first heat exchanger, respectively, and is used to pump the first circulating material from the collector into the first heat exchanger. The first heat exchanger is connected to the first circulating material outlet of the collector, and the first circulating material after heat exchange in the first heat exchanger enters the collector through the first circulating material outlet. The second loop unit includes: Second circulation pump; and Second heat exchanger; The second circulating pump is connected to the second circulating material outlet of the collector and the second heat exchanger, respectively, and is used to pump the second circulating material from the collector into the second heat exchanger. The second heat exchanger is connected to the second circulating material outlet of the reactor. The second circulating material after heat exchange in the second heat exchanger enters the reactor through the second circulating material outlet. Control unit, including: An epoxy alkane flow control valve is used to control the flow rate of epoxy alkane entering the reactor. Controller; and A reactor pressure detection device is used to detect the pressure inside the reactor; The epoxy alkane flow control valve, controller, and reactor pressure detection device form a closed loop.

[0006] The ring-opening reaction apparatus for alkyl oxidases in this application has, but is not limited to, the following technical advantages: The ring-opening reaction apparatus for alkyl epoxides provided in this application controls the feed rate by setting up two different circulation units, thereby controllably preparing target products of different molecular weights. By setting up a control unit, the flow rate of alkyl epoxides can be dynamically adjusted based on the total process pressure and the safety pressure, so that the concentration of alkyl epoxides is always below the ignition point concentration under the corresponding pressure conditions, thereby ensuring the inherent safety of the production process. Attached Figure Description

[0007] Figure 1 A schematic diagram of one structure of the ring-opening reaction apparatus for epoxide alkane of this application is shown.

[0008] Explanation of reference numerals in the attached figures: 11. Reactor; 12. Collector; 13. Temperature detection device; 21. First heat exchanger; 22. First circulating pump; 31. Second heat exchanger; 32. Second circulating pump; 41. Epoxy alkane flow control valve; 42. Controller; 43. Pressure detection device. Detailed Implementation

[0009] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0010] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and the foregoing description of this application are intended to cover non-exclusive inclusion.

[0011] The term "embodiment" as used in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0012] The specific term "exemplary" used in this application means "serving as an example, embodiment, or illustration." Any embodiment illustrated as "exemplary" is not necessarily to be construed as superior or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0013] In the description of this application, the technical terms "first", "second", "third", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0014] In the description of this application, the technical term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0015] In the description of this application, the technical terms "upper", "lower", "inner", "outer", "front", "back", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this application. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0016] In the description of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0017] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0018] In the description of this application, "multiple" means two or more (including two), unless otherwise expressly and specifically defined.

[0019] In the description of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, and other dimensions of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0020] This application provides an apparatus for a ring-opening reaction of alkyl oxidases, which may include: The reaction unit includes: The reactor, wherein the reactor is provided with an alkylene oxide inlet, a second circulating material inlet, and a first outlet; and The collector is provided with a first inlet, a first circulating material inlet, a first circulating material outlet, and a second circulating material outlet; The first outlet of the reactor is in fluid communication with the first inlet of the collector; The first loop unit includes: First circulation pump; and First heat exchanger; The first circulating pump is connected to the first circulating material outlet of the collector and the first heat exchanger, respectively, and is used to pump the first circulating material from the collector into the first heat exchanger. The first heat exchanger is connected to the first circulating material outlet of the collector, and the first circulating material after heat exchange in the first heat exchanger enters the collector through the first circulating material outlet. The second loop unit includes: Second circulation pump; and Second heat exchanger; The second circulating pump is connected to the second circulating material outlet of the collector and the second heat exchanger, respectively, and is used to pump the second circulating material from the collector into the second heat exchanger. The second heat exchanger is connected to the second circulating material outlet of the reactor. The second circulating material after heat exchange in the second heat exchanger enters the reactor through the second circulating material outlet. Control unit, including: An epoxy alkane flow control valve is used to control the flow rate of epoxy alkane entering the reactor. Controller; and A reactor pressure detection device is used to detect the pressure inside the reactor; The epoxy alkane flow control valve, controller, and reactor pressure detection device form a closed loop.

[0021] In the ring-opening reaction of alkyl epoxides, the gas phase of the reaction unit initially consists mainly of protective gas components. With the addition of alkyl epoxides, the gas phase space of the reaction unit becomes a mixture of alkyl epoxides and protective gas. Since the molar number of the protective gas remains relatively stable throughout the reaction, its partial pressure can be calculated using the real-time material quantity and volume of the reaction unit. Furthermore, the partial pressure ratio of alkyl epoxides to protective gas in the gas phase of the reaction unit is the molar ratio. Therefore, the concentration of alkyl epoxides can be determined based on the partial pressure of the protective gas in the gas phase of the reaction unit, thus determining whether it is within the ignition zone. Therefore, controlling the pressure in the gas phase space of the reactor can avoid the risk of combustion and explosion in the gas phase space. The reaction apparatus of this application, by setting a control unit and controlling the alkyl epoxide flow control valve, controls the concentration of alkyl epoxides in the gas phase space of the reaction unit, keeping it below the critical ignition point concentration, thereby achieving intrinsic safety.

[0022] In one embodiment, the collector may also be equipped with a temperature detection device for detecting the temperature of the reaction unit.

[0023] In one embodiment, the second circulating material inlet may be located at the top of the reactor; and / or The first circulating material inlet is located at the top of the collector.

[0024] In one embodiment, the reactor may be equipped with a reactor atomizing device, which is connected to the second circulating material inlet and is used to atomize the material from the second circulating material inlet; and / or The collector may be equipped with a collector atomizing device, which is connected to the first circulating material inlet and is used to atomize the material from the first circulating material inlet.

[0025] In one embodiment, the flow rate of the first circulating pump may be less than or equal to the flow rate of the second circulating pump; Preferably, the ratio of the flow rate of the first circulating pump to the flow rate of the second circulating pump is 1:1 to 5. In one embodiment, the heat exchange area of ​​the first heat exchanger may be less than or equal to the heat exchange area of ​​the second heat exchanger; Preferably, the ratio of the heat exchange area of ​​the first heat exchanger to the heat exchange area of ​​the second heat exchanger is 1:1 to 5.

[0026] This application uses two circulation units to adjust the reaction growth ratio, thereby achieving the production of target products with different molecular weights. When producing products with high growth ratios, the first circulation unit is started at the beginning of the reaction. As the reaction proceeds, the liquid volume in the collector gradually increases and the liquid level gradually rises. After a certain amount of epoxide is added and the reaction proceeds to a certain extent, the liquid in the collector can meet the circulation volume of both circulation units. That is, when the liquid level in the collector reaches the level required to start the second circulation unit, the second circulation unit is started simultaneously to improve the efficiency of the circulation reaction.

[0027] In one embodiment, the reactor may be positioned above the collector, with the first outlet of the reactor higher than the first inlet of the collector.

[0028] In one embodiment, the second circulating material inlet of the reactor is higher than the first outlet.

[0029] In one embodiment, the bottom surface of the reactor can be inclined at an angle of 5 to 30° relative to the horizontal plane, and the first outlet is located at the lower end of the bottom surface.

[0030] By tilting the reactor and placing the first outlet at a relatively low end of the bottom surface, it is beneficial for the liquid products generated in the reactor and the unreacted liquid reactants to pass through the first outlet and be introduced into the collector under the action of gravity.

[0031] In one embodiment, the reaction unit may also be provided with a protective gas inlet for introducing protective gas into the reaction unit.

[0032] To facilitate understanding of the technical solutions provided in the embodiments of this application, the ring-opening reaction apparatus for epoxides provided in the embodiments of this application will be described below.

[0033] Figure 1 A schematic diagram of one possible structure of the ring-opening reaction apparatus for epoxides according to this application is shown. Figure 1 As shown, the epoxide alkane ring-opening reaction apparatus of this application includes a reaction unit, a first circulation unit, a second circulation unit, and a control unit.

[0034] The reaction unit includes a reactor 11 and a collector 12. The reactor 11 and the collector 12 are in fluid communication via a connecting channel, which connects the first outlet of the reactor 11 and the first inlet of the collector 12. The reactor 11 is also provided with an alkyl epoxide inlet and a second circulating material inlet, and the collector 12 is also provided with a first circulating material inlet, a first circulating material outlet, and a second circulating material outlet.

[0035] In some embodiments, the first inlet of collector 12 may be configured to be lower than the first outlet of reactor 11, so that the polyether product generated in reactor 11 is introduced from the first outlet of reactor 11 through the connecting channel into the first inlet of collector 12 and into the collector under the action of gravity.

[0036] In some embodiments, the alkyl oxidant inlet and the second recycle material inlet may be located at the top of the reactor 11; the first outlet may be located at the bottom of the reactor 11; the first recycle material inlet may be located at the top of the collector 12; and / or the first recycle material outlet and the second recycle material outlet may be located at the bottom of the collector 12.

[0037] In some embodiments, reactor 11 may be positioned above collector 12, and the bottom surface of reactor 11 may be inclined at an angle of 5 to 30° relative to the horizontal plane, with the first outlet located at the lower end of the bottom surface of reactor 11.

[0038] In some embodiments, the second circulating material inlet of reactor 11 is higher than the first outlet.

[0039] In some embodiments, the reaction unit may also be provided with a protective gas inlet for introducing protective gas into the reaction unit.

[0040] In some embodiments, the reaction unit may also be equipped with a temperature detection device for detecting the temperature of the reaction unit. The temperature detection device may be installed on the reactor 11 or the collector 12.

[0041] In some embodiments, reactor 11 may be provided with a reactor atomizing device connected to a second circulating material inlet for atomizing material from the second circulating material inlet; and / or collector 12 may be provided with a collector atomizing device connected to a first circulating material inlet for atomizing material from the first circulating material inlet.

[0042] The first circulation unit includes a first circulation pump 22 and a first heat exchanger 21. The first circulation pump 22 is connected to the first circulation material outlet of the collector 12 and the first heat exchanger 21, respectively, and is used to pump the first circulation material from the collector 12 into the first heat exchanger 21. The first heat exchanger 21 is connected to the first circulation material outlet of the collector 12. The first circulation material after heat exchange in the first heat exchanger 21 enters the collector 12 through the first circulation material outlet.

[0043] The second circulation unit includes a second circulation pump 32 and a second heat exchanger 31. The second circulation pump 32 is connected to the second circulation material outlet of the collector 12 and the second heat exchanger 31, respectively, and is used to pump the second circulation material from the collector 12 into the second heat exchanger 31. The second heat exchanger 31 is connected to the second circulation material outlet of the collector 12, and the second circulation material after heat exchange in the second heat exchanger 31 enters the collector 12 through the second circulation material outlet.

[0044] In some embodiments, the flow rate of the first circulating pump 22 may be less than or equal to the flow rate of the second circulating pump 32, and the ratio of the flow rate of the first circulating pump 22 to the flow rate of the second circulating pump 32 is 1:1 to 5.

[0045] In some embodiments, the heat exchange area of ​​the first heat exchanger 21 may be less than or equal to the heat exchange area of ​​the second heat exchanger 31, and the ratio of the heat exchange area of ​​the first heat exchanger 21 to the heat exchange area of ​​the second heat exchanger 31 is 1:1 to 5.

[0046] The control unit includes an alkylene oxide flow control valve 41 for controlling the flow rate of the alkylene oxide inlet into the reactor 11, a controller 42, and a reactor pressure detection device 43 for detecting the pressure inside the reactor; the alkylene oxide flow control valve 41, the controller 43, and the reactor pressure detection device 43 form a closed loop.

[0047] In one specific embodiment, the reaction unit is a device for reacting alkyl epoxides with an initiator. An initiator, catalyst, and protective gas may be pre-added to the reaction unit, for example, pre-added to the collector 12. The alkyl epoxide enters the reactor 11 through the alkyl epoxide inlet under the flow control of the alkyl epoxide flow control valve 41. Since the reactor 11 and the collector 12 are fluidly connected, the alkyl epoxide entering the reactor 11 can sequentially enter the collector 12 through the first outlet and the first inlet, and react with the initiator and catalyst pre-added to the collector 12 in the protective gas to generate the target product. The alkyl epoxide flow control valve 41 is connected to a controller 42, so that the controller 42 can adjust the flow rate of the alkyl epoxide by controlling the flow control valve 41.

[0048] After the epoxide alkane is introduced into the reaction unit, the first circulation pump 22 can be started to pump the liquid first circulation material in the collector 12 to the first heat exchanger 21 for heat exchange treatment. The first circulation material after heat exchange treatment is pumped back into the collector 12 and reacts with the epoxide alkane transported to the collector 12 after being atomized by the first circulation material inlet set at the top of the collector 12.

[0049] As alkyl epoxides are added, the liquid volume in collector 12 gradually increases, and its liquid level gradually rises. When the starting liquid level of the second circulation pump is reached, the second circulation pump is started, and the liquid second circulation material in collector 12 is pumped to the second heat exchanger 22 for heat exchange treatment. The second circulation material after heat exchange treatment is pumped back into reactor 11 and sprayed out through the second circulation material inlet of reactor 11. After atomization, it reacts with the alkyl epoxides transported to reactor 11. The generated product polyether and the unreacted second circulation material enter collector 12 under the action of gravity through the first outlet set at the bottom of reactor 11 and the first inlet set at the top of collector 12, thereby collecting the target product.

[0050] It should be noted that the specific form of the reaction unit is not limited in the embodiments of this application. For example, the reaction unit can be a stirred tank reaction assembly, a PRESS external circulation reaction assembly, a BUSS jet loop reaction assembly, a tubular reaction assembly, etc.

[0051] The reaction unit may also be equipped with one or more detection devices to detect parameters such as temperature, pressure, and concentration during the alkoxylation reaction. These detection devices may be connected to the controller 42 (wired or wirelessly) to transmit their detected parameters to the controller 3.

[0052] In some embodiments, the reaction unit may include a temperature detection device 13 and a pressure detection device 43. The temperature detection device 13 can be used to detect the ambient temperature within the reaction unit, and the pressure detection device 43 can be used to detect the total pressure of the gas phase space within the reaction unit.

[0053] In some embodiments, the reaction unit may include a temperature detection device 13 and a protective gas pressure detection device (not shown in the figure). The temperature detection device 13 can be used to detect the ambient temperature within the reaction unit, and the protective gas pressure detection device can be used to detect the partial pressure of the protective gas in the gas phase space within the reaction unit.

[0054] In some embodiments, the reaction unit may include a temperature detection device 13 and an epoxy alkane concentration detection device (not shown in the figure). The temperature detection device 13 can be used to detect the ambient temperature within the reaction unit, and the epoxy alkane concentration detection device can be used to detect the concentration of epoxy alkane in the gas phase space within the reaction unit.

[0055] This application does not limit the specific installation location of the above-mentioned detection devices, as long as they can detect the corresponding parameters. For example, the protective gas pressure detection device and the epoxy alkane concentration detection device can be installed in... Figure 1 The position corresponding to the pressure detection device 43 shown.

[0056] It should be noted that the protective gas is not limited in the embodiments of this application; any gas capable of providing a protective atmosphere is acceptable. For example, the protective gas can be nitrogen or an inert gas. Correspondingly, when nitrogen is selected as the protective gas, the protective gas pressure detection device can be a nitrogen pressure detection device; when an inert gas is selected as the protective gas, the protective gas pressure detection device can be an inert gas pressure detection device. For example, the protective gas pressure detection device can be a gas chromatograph, etc.

[0057] It should also be noted that the alkyl oxide concentration detection device can be adapted to the specific alkyl oxide used. For example, if the alkyl oxide is ethylene oxide, the device can be one capable of detecting ethylene oxide concentration; similarly, if the alkyl oxide is propylene oxide, the device can be one capable of detecting propylene oxide concentration. For instance, the alkyl oxide concentration detection device can be an infrared spectroscopy (IR) sensor, a gas chromatograph, etc.

[0058] During different stages of the above production process, the pressure in the gas phase space within the reaction unit varies. For example, in the initial stage of the reaction, alkyl epoxides are gradually added to the reaction unit, and the conditions for initiating the reaction (such as suitable temperature and catalyst action) begin to take effect, initiating the addition reaction between the alkyl epoxides and the initiator. At this time, the pressure in the gas phase space is generally at a relatively low initial level. However, as the reaction begins, changes in the state of the materials (e.g., partial vaporization) and gas generation will cause the pressure to begin to rise. In the middle stage of the reaction, as the alkoxylation reaction proceeds steadily and continuously, the alkyl epoxides continuously undergo addition reactions with the initiator, releasing a large amount of heat of reaction. This causes more components in the liquid phase to vaporize and enter the gas phase space, leading to a continuous increase in the pressure in the gas phase space. In the later stage of the reaction, the rate of the alkoxylation reaction may begin to slow down, and the newly generated substances decrease accordingly. The upward trend in the gas phase space pressure begins to slow down until the reaction is nearly complete, at which point the pressure in the gas phase space gradually stabilizes and eventually tends to a relatively constant value.

[0059] During the aforementioned production process, one or more detection devices on the ring-opening reaction unit of the alkyl oxidant can detect the corresponding parameters in real time and transmit them to the controller 42. Then, the controller 42, based on the received parameters and using the control logic pre-configured in the controller 42, controls the alkyl oxidant flow control valve 41 to adjust the alkyl oxidant delivery flow rate. This ensures that throughout the entire alkoxylation reaction process of the current production batch, the concentration of alkyl oxidant in the gas phase space within the reaction assembly remains below the corresponding ignition point concentration under different pressure conditions, thereby guaranteeing safe production.

[0060] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A ring-opening reaction apparatus for epoxide alkane, characterized in that, include: The reaction unit includes: The reactor, wherein the reactor is provided with an alkylene oxide inlet, a second circulating material inlet, and a first outlet; and The collector is provided with a first inlet, a first circulating material inlet, a first circulating material outlet, and a second circulating material outlet; The first outlet of the reactor is in fluid communication with the first inlet of the collector; The first loop unit includes: First circulation pump; and First heat exchanger; The first circulating pump is connected to the first circulating material outlet of the collector and the first heat exchanger, respectively, and is used to pump the first circulating material from the collector into the first heat exchanger. The first heat exchanger is connected to the first circulating material outlet of the collector, and the first circulating material after heat exchange in the first heat exchanger enters the collector through the first circulating material outlet. The second loop unit includes: Second circulation pump; and Second heat exchanger; The second circulating pump is connected to the second circulating material outlet of the collector and the second heat exchanger, respectively, and is used to pump the second circulating material from the collector into the second heat exchanger. The second heat exchanger is connected to the second circulating material outlet of the reactor. The second circulating material after heat exchange in the second heat exchanger enters the reactor through the second circulating material outlet. Control unit, including: An epoxy alkane flow control valve is used to control the flow rate of epoxy alkane entering the reactor. Controller; and A reactor pressure detection device is used to detect the pressure inside the reactor; The epoxy alkane flow control valve, controller, and reactor pressure detection device form a closed loop.

2. The ring-opening reaction apparatus for alkyl epoxides according to claim 1, characterized in that, The reaction unit is also equipped with a temperature detection device for detecting the temperature of the reaction unit.

3. The ring-opening reaction apparatus for epoxide alkane according to claim 1, characterized in that, The second circulating material inlet is located at the top of the reactor; and / or The first circulating material inlet is located at the top of the collector.

4. The ring-opening reaction apparatus for epoxide alkane according to claim 1, characterized in that, The reactor is equipped with a reactor atomizing device, which is connected to the second circulating material inlet and is used to atomize the material from the second circulating material inlet; and / or The collector is equipped with a collector atomizing device, which is connected to the first circulating material inlet and is used to atomize the material from the first circulating material inlet.

5. The ring-opening reaction apparatus for epoxide alkane according to claim 1, characterized in that, The flow rate of the first circulating pump is less than or equal to the flow rate of the second circulating pump; The ratio of the flow rate of the first circulating pump to the flow rate of the second circulating pump is 1:1 to 5.

6. The ring-opening reaction apparatus for epoxide alkane according to claim 1, characterized in that, The heat exchange area of ​​the first heat exchanger is less than or equal to the heat exchange area of ​​the second heat exchanger; The ratio of the heat exchange area of ​​the first heat exchanger to the heat exchange area of ​​the second heat exchanger is 1:1 to 5.

7. The ring-opening reaction apparatus for epoxide alkane according to claim 1, characterized in that, The reactor is positioned above the collector, and the first outlet of the reactor is higher than the first inlet of the collector.

8. The ring-opening reaction apparatus for epoxide alkane according to claim 1, characterized in that, The second circulating material inlet of the reactor is higher than the first outlet.

9. The ring-opening reaction apparatus for epoxide alkane according to claim 1, characterized in that, The bottom surface of the reactor has an inclination angle of 5 to 30° relative to the horizontal plane, and the first outlet is located at the lower end of the bottom surface of the reactor.

10. The epoxide alkane ring-opening reaction apparatus according to claim 1, characterized in that, The reaction unit is also provided with a protective gas inlet for introducing protective gas into the reaction unit.

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