Sodium ethoxide crystal forming and powder screening and recycling device

Abstract

The utility model discloses a sodium ethoxide crystal forming and powder screening and recycling device which comprises a reaction kettle, a bottom discharge port of the reaction kettle is connected with a feed port of a crystallization kettle through a first transfer pump, and a bottom discharge port of the crystallization kettle is connected with a feed port of an ultrasonic screening machine through a second transfer pump; a crystal discharge hole of the ultrasonic screening machine is connected with a crystal packaging machine through a third transfer pump; a powder discharging opening of the ultrasonic screening machine is connected with a powder storage tank through a fourth material transferring pump, and a discharging opening of the powder storage tank is connected with a powder packaging machine through a fifth material transferring pump; and the other discharge port of the powder storage tank is connected with the feed port of the crystallization kettle through a sixth transfer pump to realize powder reutilization. The device disclosed by the utility model can separate sodium ethoxide crystals from a small amount of doped sodium ethoxide powder, and can realize instant reutilization of the sodium ethoxide powder.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, and relates to sodium ethoxide, specifically to a device for forming sodium ethoxide crystals and screening and reusing the powder. Background Technology

[0002] Sodium ethoxide, as an important alkali metal alkoxide, is often used as a strong basic catalyst, ethoxylation agent, coagulant and reducing agent in organic synthesis and analysis, and has wide applications in the pharmaceutical and pesticide industries.

[0003] Currently, the industrial production of sodium ethoxide is limited by factors such as process conditions, equipment parameters, and differences in worker professionalism and operating habits, resulting in two solid forms: crystalline and powder. Both solid forms have different application environments and occasions. Crystalline sodium ethoxide, due to its regular shape, uniform particle size, poor water absorption, and good stability, is generally used in downstream high-end products with higher requirements. However, the production of sodium ethoxide crystals often results in the generation of a small amount of powdered sodium ethoxide, which negatively impacts the further promotion of crystalline sodium ethoxide products and the enhancement of product added value. Given the limited applications of sodium ethoxide powder, it is often necessary to recycle it to produce crystalline sodium ethoxide, increasing production costs. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device for forming sodium ethoxide crystals and screening and reusing powder, so as to solve the technical problem that a small amount of powder contained in sodium ethoxide crystals affects the overall performance of the product.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A device for forming sodium ethoxide crystals and sieving and reusing powder includes a reaction vessel, the bottom outlet of which is connected to the inlet of a crystallization vessel via a first transfer pump, and the bottom outlet of the crystallization vessel is connected to the inlet of an ultrasonic sieve via a second transfer pump.

[0007] The crystal outlet of the ultrasonic sieve is connected to the crystal packaging machine via a third transfer pump; the powder outlet of the ultrasonic sieve is connected to the powder storage tank via a fourth transfer pump, and one outlet of the powder storage tank is connected to the powder packaging machine via a fifth transfer pump.

[0008] The other outlet of the powder storage tank is connected to the inlet of the crystallization vessel via a sixth transfer pump to enable powder reuse.

[0009] This utility model also has the following technical features:

[0010] The reactor is also equipped with a reflux condenser.

[0011] The reactor is equipped with a first stirrer; a first jacketed sleeve with coils is installed outside the reactor; the reactor is also equipped with a solid feed inlet, a first gas inlet, a first gas outlet and a liquid feed inlet.

[0012] The top solvent outlet of the crystallization vessel is connected to the shell-side feed inlet of the condenser, and the shell-side discharge outlet of the condenser is connected to the feed inlet of the solvent recovery tank.

[0013] The solvent recovery tank is also equipped with a vacuum pump.

[0014] The crystallization vessel is equipped with a second stirrer; a second jacket with a coil is installed outside the crystallization vessel; and a second gas inlet and a second gas outlet are also provided on the crystallization vessel.

[0015] The ultrasonic screening machine is equipped with a vibrating screen, a resonant ring is installed below the vibrating screen, and a transducer is installed below the resonant ring. The transducer is connected to an external ultrasonic generator.

[0016] The bottom of the ultrasonic screening machine is supported by a bracket; the ultrasonic screening machine is also equipped with a third gas inlet and a first gas outlet.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] (I) The device of this invention can separate sodium ethoxide crystals and a small amount of doped sodium ethoxide powder, and can realize the immediate reuse of sodium ethoxide powder.

[0019] (II) The device of this invention enables sodium ethoxide crystals to be formed faster and better, and easier to separate from powder. Powdered sodium ethoxide can be conveniently packaged or reused as crystals. It can effectively improve the appearance and added value of sodium ethoxide crystal products. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the device for forming sodium ethoxide crystals and screening and reusing the powder.

[0021] The labels in the diagram represent the following: 1-Reaction vessel, 2-First transfer pump, 3-Crystallization vessel, 4-Second transfer pump, 5-Ultrasonic sieve, 6-Third transfer pump, 7-Crystal packaging machine, 8-Fourth transfer pump, 9-Powder storage tank, 10-Fifth transfer pump, 11-Powder packaging machine, 12-Sixth transfer pump, 13-Reflux condenser, 14-First agitator, 15-First jacketed coil, 16-Solid feed inlet, 17-First gas inlet, 18-First gas outlet, 19-Liquid feed inlet, 20-Condenser, 21-Solvent recovery tank, 22-Vacuum pump, 23-Second agitator, 24-Second jacketed coil, 25-Second gas inlet, 26-Second gas outlet, 27-Vibrating screen, 28-Resonance ring, 29-Transducer head, 30-Ultrasonic generator, 31-Support, 32-Third gas inlet, 33-Third gas outlet, 34-Pipeline, 35-Valve.

[0022] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, all components, equipment and raw materials in this utility model are based on components, equipment and raw materials known in the prior art.

[0024] In this invention, the various devices are mainly connected by pipes 34. Each pipe 34 is equipped with a valve 35 as needed, which is opened or closed according to process requirements. All valves 35 in this invention are commonly used valves in the prior art.

[0025] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0026] Example:

[0027] This embodiment provides a device for forming sodium ethoxide crystals and sieving and reusing the powder, such as... Figure 1 As shown, the reactor includes a reactor 1. The bottom outlet of the reactor 1 is connected to the inlet of the crystallization vessel 3 via a first transfer pump 2. The bottom outlet of the crystallization vessel 3 is connected to the inlet of the ultrasonic sieve 5 via a second transfer pump 4.

[0028] like Figure 1 As shown, the crystal outlet of the ultrasonic sieve 5 is connected to the crystal packaging machine 7 via the third transfer pump 6; the powder outlet of the ultrasonic sieve 5 is connected to the powder storage tank 9 via the fourth transfer pump 8, and one outlet of the powder storage tank 9 is connected to the powder packaging machine 11 via the fifth transfer pump 10.

[0029] like Figure 1 As shown, another outlet of the powder storage tank 9 is connected to the inlet of the crystallizing vessel 3 via the sixth transfer pump 12 to achieve powder reuse.

[0030] As a preferred embodiment of this solution, such as Figure 1 As shown, a reflux condenser 13 is also installed on the reactor 1.

[0031] As a preferred embodiment of this solution, such as Figure 1 As shown, a first stirrer 14 is installed inside the reactor 1; a first jacketed sleeve with coils 15 is installed outside the reactor 1; the reactor 1 is also provided with a solid feed inlet 16, a first gas inlet 17, a first gas outlet 18 and a liquid feed inlet 19.

[0032] As a preferred embodiment of this solution, such as Figure 1 As shown, the top solvent outlet of the crystallizing vessel 3 is connected to the shell-side feed inlet of the condenser 20, and the shell-side discharge outlet of the condenser 20 is connected to the feed inlet of the solvent recovery tank 21.

[0033] As a preferred embodiment of this solution, such as Figure 1 As shown, a vacuum pump 22 is also installed on the solvent recovery tank 21.

[0034] As a preferred embodiment of this solution, such as Figure 1 As shown, a second stirrer 23 is installed inside the crystallization vessel 3; a second jacketed sleeve with coils 24 is installed outside the crystallization vessel 3; and a second gas inlet 25 and a second gas outlet 26 are also provided on the crystallization vessel 3.

[0035] As a preferred embodiment of this solution, such as Figure 1 As shown, a vibrating screen 27 is installed inside the ultrasonic screening machine 5. A resonant ring 28 is installed below the vibrating screen 27. A transducer head 29 is installed below the resonant ring 28. The transducer head 29 is connected to an external ultrasonic generator 30.

[0036] As a preferred embodiment of this solution, such as Figure 1 As shown, the bottom of the ultrasonic screening machine 5 is supported by a bracket 31; the ultrasonic screening machine 5 is also provided with a third gas inlet 32 ​​and a first gas outlet 33.

[0037] In this embodiment, the first agitator 14 is a folding blade turbine agitator. The second agitator 23 is an anchor agitator.

[0038] In this embodiment, the reaction vessel 1 is made of acid and alkali resistant enamel; the crystallization vessel 3 is made of acid and alkali resistant enamel; and the ultrasonic sieve 5 is made of 316L stainless steel.

[0039] The specific process of the sodium ethoxide crystal forming and powder sieving and reuse method using the sodium ethoxide crystal forming and powder sieving and reuse device of this utility model is as follows:

[0040] Step 1, Sodium ethoxide synthesis:

[0041] The reaction of ethanol and metallic sodium takes place in reactor 1. During feeding, the first gas inlet 17 and the first gas outlet 18 are opened for nitrogen protection. Then, ethanol is added through the liquid inlet 19, and small pieces of metallic sodium are added through the solid inlet 16. The first stirrer 14 is slowly turned on for stirring, and the first jacketed coil 15 is turned on to heat the system using circulating heating oil. During the reaction, the refluxed reaction liquid is condensed back into the system via the reflux condenser 13. The reaction is complete when there are no floating solids and the system is clear and transparent. After the reaction is complete, the reaction liquid is transported to crystallization reactor 3 by the first transfer pump 2.

[0042] Step 2, Crystal Forming:

[0043] The crystallization process of sodium ethoxide mainly takes place in crystallization vessel 3. During feeding, the second gas inlet 25 and the second gas outlet 26 are first opened for nitrogen protection. Then, the sodium ethoxide reaction solution is added through the feed inlet of crystallization vessel 3. The second stirrer 23 is slowly turned on for stirring, and the second jacketed coil 24 is turned on to use circulating heating oil for heating. During the concentration process, the evaporated reaction solution is condensed by condenser 20 and enters solvent recovery tank 21. Heating is turned off when there is no obvious ethanol condensate. The coil in the second jacketed coil 24 is turned on, and the mixed condensate of circulating ethylene glycol and water in the coil is used for condensation. The vacuum pump 22 is turned on to remove the remaining small amount of ethanol. Afterwards, the sodium ethoxide solid is transported to the ultrasonic sieve 5 by the second transfer pump 4.

[0044] Step 3, powder sieving:

[0045] The sieving of sodium ethoxide solid is carried out in ultrasonic sieving machine 5. Before sieving, the third gas inlet 32 ​​and the first gas outlet 33 are opened for nitrogen protection. Sodium ethoxide solid enters through the feed port of ultrasonic sieving machine 5 and is sieved as crystals and powder on vibrating screen 27. Support 31 provides support for ultrasonic sieving machine 5. Ultrasonic generator 30 provides the required energy, and transducer head 29 converts electrical energy into 18KHZ mechanical vibration. Resonant ring 28 will resonate under the action of oscillation wave, and then transmit it to the screen surface of vibrating screen 27 for sieving of solid.

[0046] Solid sodium ethoxide with a particle size of 50μm or larger and a certain regular crystal form is transported by the third transfer pump 6 to the crystal packaging machine 7 for packaging; powder with a particle size of less than 50μm is transported by the fourth transfer pump 8 to the powder storage tank 9 for temporary storage.

[0047] Step 3, powder reuse:

[0048] Sodium ethoxide powder temporarily stored in powder storage tank 9 can be transported to powder packaging machine 11 via fifth transfer pump 10 for packaging as needed; or it can be transported to the inlet of crystallization kettle 3 via sixth transfer pump 12 for mixing with other reaction liquids for reuse.

Claims

1. A device for forming sodium ethoxide crystals and sieving and reusing the powder, comprising a reaction vessel (1), characterized in that, The bottom outlet of the reactor (1) is connected to the inlet of the crystallizer (3) via the first transfer pump (2), and the bottom outlet of the crystallizer (3) is connected to the inlet of the ultrasonic sieve (5) via the second transfer pump (4). The crystal outlet of the ultrasonic sieve (5) is connected to the crystal packaging machine (7) via the third transfer pump (6); the powder outlet of the ultrasonic sieve (5) is connected to the powder storage tank (9) via the fourth transfer pump (8), and one outlet of the powder storage tank (9) is connected to the powder packaging machine (11) via the fifth transfer pump (10). The other outlet of the powder storage tank (9) is connected to the inlet of the crystallizing vessel (3) via the sixth transfer pump (12) to achieve powder reuse.

2. The apparatus for forming sodium ethoxide crystals and sieving and reusing the powder as described in claim 1, characterized in that, The reactor (1) is also equipped with a reflux condenser (13).

3. The apparatus for forming sodium ethoxide crystals and sieving and reusing the powder as described in claim 1, characterized in that, The reactor (1) is equipped with a first stirrer (14); a first jacket with coil (15) is installed outside the reactor (1); the reactor (1) is also equipped with a solid feed inlet (16), a first gas inlet (17), a first gas outlet (18) and a liquid feed inlet (19).

4. The apparatus for forming sodium ethoxide crystals and sieving and reusing the powder as described in claim 1, characterized in that, The top solvent outlet of the crystallization vessel (3) is connected to the shell-side feed port of the condenser (20), and the shell-side discharge port of the condenser (20) is connected to the feed port of the solvent recovery tank (21).

5. The apparatus for forming sodium ethoxide crystals and sieving and reusing the powder as described in claim 4, characterized in that, The solvent recovery tank (21) is also equipped with a vacuum pump (22).

6. The apparatus for forming sodium ethoxide crystals and sieving and reusing the powder as described in claim 1, characterized in that, The crystallization vessel (3) is equipped with a second stirrer (23); a second jacket with coils (24) is installed outside the crystallization vessel (3); the crystallization vessel (3) is also provided with a second gas inlet (25) and a second gas outlet (26).

7. The apparatus for forming sodium ethoxide crystals and sieving and reusing the powder as described in claim 1, characterized in that, The ultrasonic screening machine (5) is equipped with a vibrating screen (27), a resonant ring (28) is installed below the vibrating screen (27), a transducer head (29) is installed below the resonant ring (28), and the transducer head (29) is connected to an external ultrasonic generator (30).

8. The apparatus for forming sodium ethoxide crystals and sieving and reusing the powder as described in claim 1, characterized in that, The bottom of the ultrasonic screening machine (5) is supported by a bracket (31); the ultrasonic screening machine (5) is also provided with a third gas inlet (32) and a first gas outlet (33).

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