Monoketal production reaction kettle

Abstract

The utility model provides a monoketal production reaction kettle which comprises a reaction tank, and the bottom of the reaction tank is fixedly connected with a heating device; a stirring device is fixedly connected into the reaction tank; a round hole is formed in the top surface of the reaction tank and fixedly connected with the feed port for feeding, and a round hole is formed in the bottom of the outer wall of the reaction tank and fixedly connected with the discharge port for discharging reaction products; the grinding balls are welded at the bottom of the baffle and are uniformly arranged on the bottom surface of the baffle; the heating device is arranged at the bottom of the reaction kettle, the monoketal production reaction is heated, normal reaction is guaranteed, the control unit is arranged, a specific reaction temperature can be conveniently regulated and controlled, the thermometer is arranged at the top of the reaction kettle, the temperature change in the reaction kettle can be monitored at any time, and the reaction temperature condition can be strictly mastered conveniently.

Description

Technical Field

[0001] One or more embodiments of this specification relate to the technical field of monoketal production, and in particular, to a monoketal production reactor. Background Art

[0002] The traditional synthesis method of ketal is to directly react aldehydes, ketones and alcohols to form ketal under acid catalysis and heating under reflux.

[0003] The prior art application number is: 202322430838, and the patent name is: A Chinese utility model patent for a condensation reactor for producing 2,3-pentanedione, which describes that "the first stirring shaft and the first stirring blade are driven to rotate by a driving motor, thereby stirring the central area inside the reactor body, and the second stirring shaft and the second stirring blade thereon are driven to rotate by a fixed frame, thereby stirring the edge area of the reactor body, so that the stirring effect of the stirring mechanism is stronger and the stirring area is more comprehensive, so as to stir the input raw materials more evenly. The raw materials added to the reactor body are dispersed into two different areas through two symmetrically arranged first feeding pipes to avoid excessive concentration of the input raw materials to hinder uniform stirring, and the input catalyst and other materials are quickly dispersed into the interior of the reactor body through three second feeding pipes and the stirring mechanism." However, the target product described therein needs to be produced under heating conditions, but the lack of a heating device inside the condensation reactor body may cause the reaction to fail, delaying the production process. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a monoketal production reactor to solve the problem of reactor heating in the prior art.

[0005] Based on the above purpose, the utility model provides a monoketal production reactor, comprising a reaction tank, the bottom of which is fixedly connected to a heating device for controlling the reaction temperature and controlling the monoketal production reaction process;

[0006] The heating device includes a control unit for controlling the heating process, and a heating tube, wherein the heating tube is spirally coiled at the bottom of the reaction tank;

[0007] A temperature display device is fixedly installed on the top of the reaction tank to monitor the temperature changes during the reaction;

[0008] A stirring device is fixedly connected to the interior of the reaction tank for mixing the reactants uniformly;

[0009] A circular hole is provided on the top surface of the reaction tank, which is fixedly connected to the feed port for adding materials, and a circular hole is provided on the bottom of the outer wall of the reaction tank, which is fixedly connected to the discharge port for releasing the reaction product.

[0010] Preferably, the temperature display device includes a thermometer, the bottom of which leads to the interior of the reaction tank and is used to detect the internal reaction temperature.

[0011] Preferably, the stirring device includes a stirring column, and a motor is connected to the top of the stirring column to drive the stirring column to rotate at a certain speed.

[0012] Preferably, baffles are welded around the lower part of the stirring column to drive the reactants to rotate, thereby mixing them evenly and causing a chemical reaction.

[0013] Preferably, a plurality of rectangular holes are provided on the surface of the baffle plate to reduce the contact area with the reactants and enable the reactants to be fully mixed in the reaction tank.

[0014] Preferably, grinding balls are welded to the bottom of the baffle, and the grinding balls are evenly arranged on the bottom surface of the baffle, so as to contact with the reactants at the bottom and drive the reactants at the bottom to rotate, thereby promoting the reaction process.

[0015] As can be seen from the above description, the utility model provides a monoketal production reactor, which heats the monoketal production reaction by arranging a heating device at the bottom of the reactor to ensure the normal progress of the reaction, and is provided with a control unit to facilitate regulation to a specific reaction temperature. A thermometer is provided on the top of the reactor to monitor the temperature changes inside the reactor at any time, so as to facilitate strict control of the reaction temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only one or more embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is the front view of the utility model;

[0019] Figure 3 This is a cross-sectional view of the utility model;

[0020] Figure 4 It is a top view of the utility model;

[0021] Figure 5 This is a cross-sectional view of the utility model;

[0022] Figure 6 It is a three-dimensional schematic diagram of the internal components of the utility model.

[0023] In the figure: 1. Feed port; 2. Motor; 3. Thermometer; 4. Reaction tank; 5. Discharge port; 6. Heating tube; 7. Control unit; 8. Stirring column; 9. Grinding ball; 10. Heating device; 11. Baffle. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] Example 1:

[0027] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, a monoketal production reactor is provided, comprising a reaction tank 4, wherein a heating device 10 is fixedly connected to the bottom of the reaction tank 4 for controlling the reaction temperature and the progress of the monoketal production reaction;

[0028] Among them, the internal materials of the reaction tank 4 are all made of materials with good corrosion resistance to avoid damage to the container after adding acidic reaction liquid to the system;

[0029] The heating device 10 includes a control unit 7 for controlling the heating process, and a heating tube 6, which is a spiral disk at the bottom of the reaction tank 4;

[0030] If the target product is 1,4-cyclohexanedione monoketal, the reaction needs to be stirred and heated to 80-85°C for reaction.

[0031] A temperature display device is fixedly installed on the top of the reaction tank 4 to monitor the temperature changes during the reaction;

[0032] The reaction tank 4 is fixedly connected to a stirring device for mixing the reactants uniformly;

[0033] The top surface of the reaction tank 4 is provided with a circular hole, which is fixedly connected to the feed port 1 for feeding, and the bottom of the outer wall of the reaction tank 4 is provided with a circular hole, which is fixedly connected to the discharge port 5 for releasing the reaction product;

[0034] The discharge port 5 may be equipped with a valve or connected to a pipeline, and connected to required devices according to actual production needs.

[0035] The temperature display device includes a thermometer 3, the bottom of which leads to the interior of the reaction tank 4 and is used to detect the internal reaction temperature;

[0036] Among them, the edge of the hole on the surface of the reaction pool 4 for inserting the thermometer 3 is fixedly connected with a rubber strip of a certain height to increase friction and fix the position of the thermometer 3 so that the thermometer 3 is easy to take and does not slip;

[0037] The thermometer 3 does not contact the stirring device to avoid breaking the thermometer during stirring. The stirring device includes a stirring column 8, and a motor 2 is connected to the top of the stirring column 8 to drive the stirring column 8 to rotate at a certain speed.

[0038] Baffles 11 are welded around the lower part of the stirring column 8 to drive the reactants to rotate, thereby mixing them evenly and causing a condensation reaction.

[0039] The baffle 11 has a plurality of rectangular holes on its surface to reduce the contact area with the reactants and enable the reactants to be fully mixed in the reaction tank 4 .

[0040] The grinding balls 9 are welded to the bottom of the baffle 11 and are evenly arranged on the bottom surface of the baffle 11. They are used to contact the bottom reactants and drive the bottom reactants to rotate, thereby promoting the reaction process. When contacting with large-particle reactants, the large particles can be ground into small particles, thereby facilitating the rapid condensation reaction.

[0041] Example 2:

[0042] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, a monoketal production reactor is provided, comprising a reaction tank 4, wherein a heating device 10 is fixedly connected to the bottom of the reaction tank 4 for controlling the reaction temperature and the progress of the monoketal production reaction;

[0043] Among them, the internal materials of the reaction tank 4 are all made of materials with good corrosion resistance to avoid damage to the container after adding acidic reaction liquid to the system;

[0044] The heating device 10 includes a control unit 7 for controlling the heating process, and a heating tube 6, which is a spiral disk at the bottom of the reaction tank 4;

[0045] If the target product is 1,4-cyclohexanedione monoketal, the reaction needs to be stirred and heated to 80-85°C for reaction.

[0046] A temperature display device is fixedly installed on the top of the reaction tank 4 to monitor the temperature changes during the reaction;

[0047] The reaction tank 4 is fixedly connected to a stirring device for mixing the reactants uniformly;

[0048] The top surface of the reaction tank 4 is provided with a circular hole, which is fixedly connected to the feed port 1 for feeding, and the bottom of the outer wall of the reaction tank 4 is provided with a circular hole, which is fixedly connected to the discharge port 5 for releasing the reaction product;

[0049] The discharge port 5 may be equipped with a valve or connected to a pipeline, and connected to required devices according to actual production needs.

[0050] The stirring device includes a stirring column 8, and the top of the stirring column 8 is connected to a motor 2 for driving the stirring column 8 to rotate at a certain speed.

[0051] Baffles 11 are welded around the lower part of the stirring column 8 to drive the reactants to rotate, thereby mixing them evenly and causing a condensation reaction.

[0052] The baffle 11 has a plurality of rectangular holes on its surface to reduce the contact area with the reactants and enable the reactants to be fully mixed in the reaction tank 4 .

[0053] Working principle: Taking 1,4-cyclohexanedione monoketal as an example, cyclohexanedione is added to the acidic reaction liquid of tetrahydrofuran through the feed port 1 and stirred until the cyclohexanedione is completely dissolved. Then, the heating device 10 is turned on and the required temperature is set. Then, ethylene glycol and a catalyst are added to the reaction system. The stirring is continued and the temperature is raised to a suitable reaction temperature (such as 80-85°C) to carry out the reaction. The reaction time is usually several hours (such as 6 hours) to ensure that the reaction is fully carried out. After the reaction is completed, the product is obtained from the discharge port 5.

[0054] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Within the scope of the present invention, the above embodiments or technical features in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0055] The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A monoketal production reactor, comprising a reaction tank (4), characterized in that: The bottom of the reaction tank (4) is fixedly connected to a heating device (10) for controlling the reaction temperature and the progress of the monoketal production reaction; The heating device (10) includes a control unit (7) for controlling the heating process, and a heating tube (6), wherein the heating tube (6) is a spiral disk at the bottom of the reaction tank (4); A temperature display device is fixedly installed on the top of the reaction tank (4) to monitor the temperature changes during the reaction process; The reaction tank (4) is internally fixedly connected to a stirring device for uniformly mixing the reactants; A circular hole is provided on the top surface of the reaction tank (4) and is fixedly connected to the feed port (1) for feeding materials. A circular hole is provided on the bottom of the outer wall of the reaction tank (4) and is fixedly connected to the discharge port (5) for releasing the reaction product.

2. A monoketal production reactor according to claim 1, characterized in that: The temperature display device comprises a thermometer (3), the bottom of which leads to the interior of the reaction tank (4) and is used to detect the internal reaction temperature.

3. A monoketal production reactor according to claim 1, characterized in that: The stirring device comprises a stirring column (8), the top of which is connected to a motor (2) for driving the stirring column (8) to rotate at a certain speed.

4. A monoketal production reactor according to claim 3, characterized in that: Baffles (11) are welded around the lower part of the stirring column (8) to drive the reactants to rotate, thereby mixing them evenly and causing a chemical reaction.

5. A monoketal production reactor according to claim 4, characterized in that: A plurality of rectangular holes are provided on the surface of the baffle (11) to reduce the contact area with the reactants and enable the reactants to be fully mixed in the reaction tank (4).

6. A monoketal production reactor according to claim 5, characterized in that: The bottom of the baffle (11) is welded with grinding balls (9), which are evenly arranged on the bottom surface of the baffle (11) and are used to contact the bottom reactants and drive the bottom reactants to rotate, thereby promoting the reaction process.

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