Special reaction kettle for Grignard reaction

Abstract

The utility model discloses a special reaction kettle for Grignard reaction, and relates to the field of fine chemical engineering. The reaction kettle special for the Grignard reaction comprises a reaction kettle body, a stirring assembly used for stirring a solution is installed in the reaction kettle body, and the reaction kettle further comprises a separation disc which is fixedly connected into the reaction kettle body and located below the stirring assembly; the hollow filter column is rotationally connected to the center position of the bottom of the separation disc through a fixing rod; according to the reaction kettle, the separation disc, the water spraying pipe, the hollow filter column, the blade plate group, the circulating pump, the liquid pumping pipe and the liquid conveying pipe are matched for use, so that when the reaction kettle is used for Grignard reaction, excessive magnesium chips can be intercepted in the reaction kettle and can be continuously used by a reaction solution in the next reaction; and the residual magnesium chips can be prevented from blocking filter holes of the filter assembly to influence the flow speed of the solution, so that the smoothness of discharging the solution out of the reaction kettle is effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of fine chemical industry, and specifically relates to a special reaction kettle for Grignard reaction. Background Art

[0002] Grignard reaction, also known as Grignard reaction, is one of the important organic reactions using Grignard reagents (magnesium metal organic compounds). Since the electronegativity of carbon in the Grignard reagent is greater than that of magnesium, the hydrocarbon group carries a partial negative charge and the magnesium ion carries a partial positive charge. It can react with most functional groups and many inorganic compounds, and can be carried out directly without separation. Therefore, Grignard reagents are a type of nucleophilic reagent that can be used to prepare many types of organic compounds (hydrocarbons, alcohols, carboxylic acids and certain metal organic compounds, etc.), and are widely used in organic synthesis in the chemical industry.

[0003] At present, the Grignard reaction is generally carried out in a dedicated Grignard reaction reactor. The existing dedicated Grignard reaction reactor discharges the material from the bottom of the tank. In order to prevent the remaining magnesium chips after the Grignard reaction from clogging the bottom of the tank, a filter plate is often provided to filter the excess magnesium chips so that they remain in the reaction device for continued use next time. However, during use, the magnesium chips are prone to clogging the filter holes of the filter plate, which may affect the discharge efficiency of the reaction solution. In view of this, the present utility model is specially proposed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a Grignard reaction kettle which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is as follows: a Grignard reaction dedicated reactor, comprising a reactor body, wherein a stirring assembly for stirring the solution is installed in the reactor body, and further comprising: a separation plate, fixedly connected to the reactor body and located below the stirring assembly; a hollow filter column, rotatably connected to the center position of the bottom of the separation plate by a fixed rod, and on the same central axis as the center of the discharge port of the reactor body, the bottom of the hollow filter column is slidably attached to the bottom of the reactor body; a blade group, fixed The filter element is fixedly connected to the upper end of the hollow filter column; the water spray pipe used in conjunction with the blade group is fixedly connected to the separation plate at equal intervals on the circumference, and the separation plate is provided with a pipe opening that is connected to the water spray pipe; the circulating pump is fixedly connected to the reactor body through a support plate, the liquid inlet of the circulating pump is connected to the liquid extraction pipe, the liquid outlet of the circulating pump is connected to the liquid delivery pipe, the liquid inlet of the liquid extraction pipe is connected to the circulation port provided at the bottom of the reactor body near the discharge valve, and the liquid outlet of the liquid delivery pipe is connected to the liquid return port provided at the upper end of one side of the reactor body.

[0006] Furthermore, the stirring assembly includes a motor, a rotating shaft and a stirring rod. The motor is fixedly connected to the kettle cover of the reactor body, the rotating shaft is fixedly connected to the output end of the motor, and the stirring rod is fixedly connected to one end of the rotating shaft located inside the reactor body at equidistant intervals around the circumference.

[0007] In order to facilitate the mixing of excess magnesium chips in the reaction solution so that the circulation pump can draw them back into the cavity above the separation disk inside the reactor body, the hollow filter column is further fixedly connected to a toggle rod at equal distances around the circumference through a connecting rod.

[0008] In order to increase the impact force of the solution on the blade group, a nozzle is fixedly connected to the water outlet of the water spray pipe.

[0009] In order to further enhance the impact force of the solution on the blade group, a suction pump is connected between the water spray pipe and the through-hole of the separation plate, and the suction pump is fixedly connected to the separation plate.

[0010] In order to facilitate the more complete discharge of the reaction solution, the separation disk is further a conical disk.

[0011] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: the utility model uses the separation plate, the water spray pipe, the hollow filter column, the blade group, the circulation pump and the liquid extraction pipe and the liquid infusion pipe components in combination. When using the reactor for Grignard reaction, the utility model can not only intercept excess magnesium chips in the reactor to continue to supply the reaction solution for the next reaction, but also prevent the remaining magnesium chips from affecting the flow rate of the solution due to clogging the filter holes of the filter assembly, thereby effectively ensuring the smooth discharge of the solution from the reactor.

[0012] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the attached figure:

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure inside the reactor body of the utility model;

[0016] Figure 3 It is a partial structural diagram of the utility model.

[0017] In the figure: 1. Reactor body; 101. Motor; 102. Rotating shaft; 103. Stirring rod; 104. Discharge valve; 2. Separating plate; 201. Water spray pipe; 202. Suction pump; 203. Spray nozzle; 3. Hollow filter column; 301. Blade assembly; 302. Toggle rod; 303. Circulation pump; 304. Liquid extraction pipe; 305. Liquid infusion pipe. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0019] Example 1: Reference Figure 1-Figure 3 The Grignard reaction reactor comprises a reactor body 1, in which a stirring assembly for stirring the solution is installed, and further comprises: a separation disk 2, fixedly connected to the reactor body 1 and located below the stirring assembly; a hollow filter column 3, rotatably connected to the center position of the bottom of the separation disk 2 by a fixed rod, and on the same central axis as the center of the discharge port of the reactor body 1, and the bottom of the hollow filter column 3 is slidably attached to the bottom of the reactor body 1; a blade group 301, fixedly connected to the upper end of the hollow filter column 3; a water spray pipe 201 used in conjunction with the blade group 301, fixedly connected to the separation disk 2 at equidistant intervals on the circumference; On the partition plate 2, a pipe opening that is connected to the water spray pipe 201 is opened on the partition plate 2; the circulation pump 303 is fixedly connected to the reactor body 1 through a support plate, and the liquid inlet of the circulation pump 303 is connected to the liquid extraction pipe 304, and the liquid outlet of the circulation pump 303 is connected to the liquid delivery pipe 305. The liquid inlet of the liquid extraction pipe 304 is connected to the circulation port opened at the bottom of the reactor body 1 near the discharge valve 104, and the liquid outlet of the liquid delivery pipe 305 is connected to the return liquid port opened at the upper end of one side of the reactor body 1. Among them, the through-port of the partition plate 2 and the circulation port of the reactor body 1 are both provided with solenoid valves not shown in the figure.

[0020] The stirring assembly includes a motor 101, a rotating shaft 102 and a stirring rod 103. The motor 101 is fixedly connected to the kettle cover of the reactor body 1, the rotating shaft 102 is fixedly connected to the output end of the motor 101, and the stirring rod 103 is fixedly connected to one end of the rotating shaft 102 located inside the reactor body 1 at equidistant intervals around the circumference.

[0021] In the chemical industry, when Grignard reagent is needed to prepare organic matter, the staff first adds the reaction solution and Grignard reagent into the reactor body 1 through the feed pipe provided on the reactor cover in a certain proportion, and then starts the motor 101, so that the motor 101 drives the stirring rod 103 to stir in the solution through the rotating shaft 102, thereby prompting the reaction solution and the Grignard reagent to react quickly. When the Grignard reaction is completed and needs to be discharged, the discharge valve 104 at the discharge port of the reactor body 1 can be opened, and then the solenoid valve at the through-hole of the separation disk 2 is opened. Then, the organic solution after the reaction is completed will enter the water spray pipe 201 through the through-hole, and enter the cavity below the separation disk 2 inside the reactor body 1 through the water spray pipe 201. Then, the organic solution will pass through the filter holes of the hollow filter column 3 and be discharged through the discharge port, and the remaining magnesium chips in the solution will be accumulated and intercepted in the reactor body 1 by the action of the hollow filter column 3, so that it will remain in the reactor body 1 for next use.

[0022] Among them, when the water spray pipe 201 sprays the solution, the solution will be sprayed toward the blade group 301 through the water outlet of the water spray pipe 201, and then the blade group 301 will drive the hollow filter column 3 to rotate rapidly under the impact force of the solution, thereby being able to throw away the magnesium chips attached to the surface of the hollow filter column 3, preventing the remaining magnesium chips from clogging the filter pores of the hollow filter column 3 and affecting the flow rate of the solution, and effectively ensuring the smooth discharge of the solution from the reactor.

[0023] When the next Grignard reaction is carried out, the reaction solution and the Grignard reagent can be added into the reactor body 1 again, and then the stirring rod 103 can be controlled to stir the solution. At the same time, the solenoid valve at the through-hole of the separation disk 2 and the solenoid valve at the circulation port of the reactor body 1 can be opened during the reaction, and then the circulation pump 303 is started again. When the solution enters the cavity below the separation disk 2 in the reactor body 1, the solution will be mixed with the magnesium chips intercepted by the hollow filter column 3 in the cavity below, and then the circulation pump 303 will suck the solution containing magnesium chips into the cavity above the reactor body 1 through the liquid extraction tube 304 and the liquid infusion tube 305, so that the remaining magnesium chips can be collected and participate in the reaction again.

[0024] Example 2: Reference Figure 1-Figure 3, a special reactor for Grignard reaction is basically the same as that in Example 1, except that: the hollow filter column 3 is fixedly connected to the toggle rods 302 at equal intervals in a circle by connecting rods. By arranging multiple toggle rods 302 on the hollow filter column 3, when the hollow filter column 3 is rotated, the reaction solution below the separation disk 2 inside the reactor body 1 can be stirred by the toggle rods 302, so that excess magnesium chips can be mixed in the reaction solution, so that the circulation pump 303 can draw them back into the cavity above the separation disk 2 inside the reactor body 1, thereby realizing the recycling and reuse of the magnesium chips.

[0025] The water outlet of the water spray pipe 201 is fixedly connected to a nozzle 203. By arranging the nozzle 203 at the water outlet of the water spray pipe 201, the impact force of the solution on the blade group 301 can be increased, so as to better drive the hollow filter column 3 to rotate.

[0026] A suction pump 202 is connected between the water spray pipe 201 and the through-hole of the separation disk 2. The suction pump 202 is fixedly connected to the separation disk 2. Through the setting of the suction pump 202, a certain power can be provided to the solution sprayed through the water spray pipe 201, thereby facilitating better impact on the blade group 301, so that the hollow filter column 3 can rotate more smoothly.

[0027] The separation disk 2 is a conical disk. When the format reaction of the solution is completed and the reaction solution needs to be discharged, the separation disk 2 is designed to be conical, which can guide the reaction solution and facilitate the more sufficient discharge of the reaction solution.

[0028] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. Grignard reaction dedicated reactor, characterized in that, The invention comprises a reaction kettle body (1), wherein a stirring assembly for stirring a solution is installed in the reaction kettle body (1), and further comprises: A separation plate (2) is fixedly connected to the reactor body (1) and is located below the stirring assembly; The hollow filter column (3) is rotatably connected to the center of the bottom of the separation disk (2) via a fixed rod and is coaxial with the center of the discharge port of the reactor body (1). The bottom of the hollow filter column (3) is slidably attached to the bottom of the reactor body (1). a blade assembly (301) fixedly connected to the upper end of the hollow filter column (3); The water spray pipe (201) used in conjunction with the blade assembly (301) is fixedly connected to the separation plate (2) at equal intervals on the circumference, and the separation plate (2) is provided with a pipe opening that is in communication with the water spray pipe (201); The circulation pump (303) is fixedly connected to the reactor body (1) via a support plate. The liquid inlet of the circulation pump (303) is connected to a liquid extraction pipe (304), and the liquid outlet of the circulation pump (303) is connected to a liquid delivery pipe (305). The liquid inlet of the liquid extraction pipe (304) is connected to a circulation port provided at the bottom of the reactor body (1) near the discharge valve (104), and the liquid outlet of the liquid delivery pipe (305) is connected to a liquid return port provided at the upper end of one side of the reactor body (1).

2. The Grignard reaction dedicated reactor according to claim 1, characterized in that: The stirring assembly comprises a motor (101), a rotating shaft (102) and a stirring rod (103); the motor (101) is fixedly connected to the kettle cover of the reactor body (1); the rotating shaft (102) is fixedly connected to the output end of the motor (101); and the stirring rod (103) is fixedly connected to one end of the rotating shaft (102) located inside the reactor body (1) at equidistant intervals around the circumference.

3. The Grignard reaction dedicated reactor according to claim 1, characterized in that: The hollow filter column (3) is fixedly connected to a toggle rod (302) at equal distances around the circumference via a connecting rod.

4. The Grignard reaction dedicated reactor according to claim 1, characterized in that: A spray head (203) is fixedly connected to the water outlet of the water spray pipe (201).

5. The Grignard reaction dedicated reactor according to claim 4, characterized in that: A suction pump (202) is connected between the water spray pipe (201) and the through-opening of the separation disk (2), and the suction pump (202) is fixedly connected to the separation disk (2).

6. The Grignard reaction dedicated reactor according to claim 1, characterized in that: The separation disc (2) is a conical disc.

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