Reaction product collecting device

Abstract

The utility model provides a reaction product collecting device which comprises a reactor used for carrying out a direct-method amidation reaction; the receiving kettle is used for collecting reaction products, and an outlet of the reactor is connected with the receiving kettle; the packed column is vertically arranged at the top of the receiving kettle, one end of the packed column is communicated with an inner cavity of the receiving kettle, and the packed column is used for enabling a reaction product in the gasified material in the receiving kettle to flow back into the receiving kettle; one end of the condenser is communicated with the other end of the packed column, and the other end of the condenser is also connected with a receiving tank for collecting materials which are not completely reacted; the material transfer pump is arranged at the bottom of the receiving tank and is used for conveying materials which are not completely reacted into the reactor to react again; the reaction device can preliminarily separate reaction products, reduces product loss and is easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a collecting device for the products of direct amideification reaction. Background Art

[0002] In the field of organic synthesis, the amideification reaction is a basic and important synthesis reaction, which is widely used in the fields of medicine, pesticides, materials science, etc. However, traditional amideification reactions usually require the activation of carboxylic acids before reacting with amines. The carboxylic acid activation process consumes chemical raw materials and energy, and small molecule by-products are also generated during the synthesis with amines. The direct amideification reaction generally mixes carboxylic acid and amine raw materials and heats them to a certain reaction temperature. Under the action of a catalyst, the carboxylic acid directly reacts with the amine to form an ammonium salt product and release water molecules. Since the direct amideification reaction does not require an intermediate carboxyl activation process, it has less energy consumption and reduces the emission of three wastes, which conforms to the concept of green chemistry.

[0003] The traditional device for collecting the products of direct amideification reaction usually condenses and collects all the reaction materials and then refines them. Then, it takes multiple steps to complete the product purification, which not only increases the operation difficulty but also may cause product loss due to improper operation. In addition, the traditional device has high energy consumption and often cannot achieve continuous collection operation.

[0004] Therefore, there is an urgent need for a reaction product collecting device that can preliminarily separate the reaction products, reduce product loss, and is easy to operate. Content of the Utility Model

[0005] The purpose of the utility model is to provide a reaction product collecting device, aiming to solve the technical problems of cumbersome subsequent purification and easy product loss of the traditional collecting device.

[0006] To achieve the above purpose, the utility model provides a reaction product collecting device, including:

[0007] A reactor for carrying out the direct amideification reaction;

[0008] A receiving kettle for collecting reaction products, and the outlet of the reactor is connected to the receiving kettle;

[0009] A packing column vertically arranged at the top of the receiving kettle, with one end communicating with the inner cavity of the receiving kettle, for returning the reaction products in the vaporized materials in the receiving kettle to the receiving kettle;

[0010] A condenser, one end of the condenser is connected to the other end of the packing column, and the other end of the condenser is also connected to a receiving tank for collecting incompletely reacted materials;

[0011] A material transfer pump is provided at the bottom of the receiving tank for conveying incompletely reacted materials into the reactor for further reaction.

[0012] As a further improvement of the above solution, a reflux pipeline is also connected to the upper part of the receiving tank for realizing desolventization and refining of unreacted materials.

[0013] As a further improvement of the above solution, a material distributor and a first temperature control system are provided inside the reactor to ensure the efficient progress of the reaction.

[0014] As a further improvement of the above solution, the receiving kettle includes a receiving kettle body, a jacket provided outside the receiving kettle body, and a second temperature control system to keep the solvent and low-boiling components received from the reactor in a vaporized state.

[0015] As a further improvement of the above solution, a first switching valve is provided between the reactor and the receiving kettle.

[0016] As a further improvement of the above solution, a second switching valve is provided between the other end of the condenser and the receiving tank.

[0017] As a further improvement of the above solution, a connecting pipeline for connecting to the reactor is also provided at the bottom of the receiving tank, and a third switching valve is provided on the connecting pipeline.

[0018] Since the present utility model adopts the above technical solutions, the beneficial effects of the present application are as follows:

[0019] The present utility model provides a reaction product collection device, including: a reactor for carrying out a direct method amidation reaction; a receiving kettle for collecting reaction products, the outlet of the reactor is connected to the receiving kettle; a packing column is vertically arranged at the top of the receiving kettle, one end is communicated with the inner cavity of the receiving kettle, and is used to make the reaction products in the vaporized materials in the receiving kettle flow back into the receiving kettle; a condenser, one end of the condenser is communicated with the other end of the packing column, and the other end of the condenser is also connected to a receiving tank for collecting incompletely reacted materials; a material transfer pump is provided at the bottom of the receiving tank for conveying incompletely reacted materials into the reactor for further reaction; such a clever setting enables the product gas in the reactor to be quickly and effectively condensed into a liquid (reaction product) and collected in the receiving kettle, first enabling the preliminary separation of the reaction product; the incompletely reacted materials are collected in the collection tank through a cooler and then conveyed to the reactor through a material transfer pump for secondary reaction, thereby enabling the continuous collection of the reaction product, and further improving the collection efficiency of the reaction product;

[0020] In addition, the device provided by the present utility model has a simple structure and convenient operation, greatly reducing the complexity of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 FIG. is a schematic perspective view of a reaction product collection device disclosed by the present utility model.

[0023] Reference numerals:

[0024] 1. Reactor; 2. Receiving kettle; 21. First switching valve; 3. Packing column; 4. Condenser; 5. Receiving tank; 51. Second switching valve; 6. Material transfer pump; 7. Return pipeline; 8. Connecting pipeline; 81. Third switching valve.

[0025] The realization of the object, functional features, and advantages of the present utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down,...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0029] Moreover, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] See Figure 1 , the present utility model provides a reaction product collection device, comprising:

[0031] A reactor 1 for carrying out a direct amination reaction; specifically, a material distributor and a first temperature control system are provided inside the reactor 1 to ensure the efficient reaction of the materials therein;

[0032] A receiving kettle 2, the outlet of the reactor 1 is connected to the receiving kettle 2 for collecting the reaction products generated by the reactor 1; specifically, the receiving kettle 2 includes a receiving kettle 2 body, a jacket provided outside the receiving kettle 2 body, and a second temperature control system. The matching setting of the jacket and the second temperature control system can control the temperature inside the receiving kettle 2 to be appropriate. Preferably, the second temperature control system controls the temperature of the receiving kettle 2 below the boiling point of the main reaction product, so that the solvent and low-boiling components received from the reactor 1 remain in a vaporized state;

[0033] A packing column 3, vertically arranged on the top of the receiving kettle 2, one end of which is communicated with the inner cavity of the receiving kettle 2, for returning the reaction products in the vaporized materials in the receiving kettle 2 to the receiving kettle 2; specifically, the unreacted raw materials and part of the main products in the vaporized state enter the packing column 3, and after passing through the packing column 3, part of the entrained main product materials cause the high-boiling components (mainly reaction products) to return to the receiving kettle 2;

[0034] A condenser 4, one end of the condenser 4 is communicated with the other end of the packing column 3, and the other end of the condenser 4 is also connected to a receiving tank 5 for collecting incompletely reacted materials; specifically, the gas components coming out of the packing column 3 enter the receiving tank 5 after being condensed by the condenser 4, realizing the separation of the reaction liquid and the collection of the products;

[0035] A material transfer pump 6 is arranged at the bottom of the receiving tank 5 for conveying the incompletely reacted materials into the reactor 1 for re-reaction;

[0036] Such a clever setting enables the product gas in the reactor 1 to be quickly and effectively condensed into a liquid (reaction product), which is collected in the receiving kettle 2, enabling the initial separation of the reaction product. The unreacted materials are collected in the collection tank through the cooler and then transported to the reactor 1 by the material transfer pump for a secondary reaction, thereby enabling the continuous collection of the reaction product and improving the collection efficiency of the reaction product. In addition, the combined setting of the packing column 3 and the condenser 4 causes the reaction product in the gasification state to be condensed and separated under the action of the cooling medium. The main product flows back to the receiving kettle 2, and the unreacted materials enter the receiving tank 5 through the pipeline, realizing the separation of the reaction liquid and the collection of the product. The unreacted materials in the receiving tank 5 are transported to the reactor 1 again by the material transfer pump 6 for reaction again. Such a cycle enables continuous reaction and generation, effectively improving the collection efficiency of the main reaction product.

[0037] The device provided by the utility model has a simple structure and convenient operation, greatly reducing the complexity of manual operation.

[0038] As a preferred embodiment, a reflux pipeline 7 is also connected to the upper part of the receiving tank 5 for realizing the desolvation and refining of the unreacted materials. Specifically, the reflux pipeline 7 includes a reflux pipe body and a first control valve provided on the reflux pipe body and close to one end of the receiving tank 5.

[0039] At least one bending section is provided on the reflux pipe body, and a second control valve is provided on the bending section. One end of the reflux pipe body is communicated with the receiving tank 5, and the other end is communicated with the connecting pipe between the packing column 3 and the condenser 4. When the unreacted materials in the receiving tank 5 exceed the preset height and overflow into the reflux pipe body, the setting of the bending section can store a certain amount of unreacted materials, preventing the uncondensed liquid gas from directly entering the receiving tank 5. The materials in the bending section can be discharged through the second control valve, or the condensed liquid sample can be extracted therefrom.

[0040] As a preferred embodiment, a first switching valve 21 is provided between the reactor 1 and the receiving kettle 2 for controlling whether the reaction product in the reactor 1 flows into the receiving kettle 2 for collection.

[0041] A second switching valve 51 is provided between the other end of the condenser 4 and the receiving tank 5 for controlling whether the uncompleted reaction product condensed by the condenser 4 is collected by the receiving tank 5.

[0042] A connecting pipeline 8 for connecting the reactor 1 is further provided at the bottom of the receiving tank 5, and a third switching valve 81 is provided on the connecting pipeline 8.

[0043] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or any direct / indirect application in other related technical fields shall be included in the patent protection scope of the present utility model.

Claims

1. A reaction product collecting device, characterized in that: include: A reactor for performing a direct amidation reaction; A receiving kettle, used to collect the reaction product, the outlet of the reactor is connected to the receiving kettle; A packing column, vertically arranged on the top of the receiving kettle, one end of which is connected to the inner cavity of the receiving kettle, and is used to make the reaction products in the gasified material in the receiving kettle flow back into the receiving kettle; A condenser, one end of which is connected to the other end of the packing column, and the other end of the condenser is also connected to a receiving tank for collecting unreacted materials; The material transfer pump is arranged at the bottom of the receiving tank and is used to transport the unreacted material to the reactor for further reaction.

2. A reaction product collecting device according to claim 1, characterized in that: The upper part of the receiving tank is also connected with a reflux pipeline for achieving desolventizing and refining of unreacted materials.

3. A reaction product collecting device according to claim 1 or 2, characterized in that: A material distributor and a first temperature control system are arranged inside the reactor to ensure efficient reaction.

4. A reaction product collecting device according to claim 1 or 2, characterized in that: The receiving kettle comprises a receiving kettle body, a jacket arranged outside the receiving kettle body and a second temperature control system, so as to keep the solvent and low-boiling-point components received from the reactor in a vaporized state.

5. A reaction product collecting device according to claim 1 or 2, characterized in that: A first switch valve is provided between the reactor and the receiving kettle.

6. A reaction product collecting device according to claim 1 or 2, characterized in that: A second switch valve is provided between the other end of the condenser and the receiving tank.

7. A reaction product collecting device according to claim 1 or 2, characterized in that: A connecting pipe for connecting to the reactor is also provided at the bottom of the receiving tank, and a third switch valve is provided on the connecting pipe.

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