N-allyl-O-isobutyl thiocarbamate continuous reaction system

Abstract

A continuous reaction system for N-allyl-O-isobutyl thiocarbamate comprises a reaction kettle, the top of the reaction kettle is communicated with an allyl isothiocyanate feeding pipe, an isobutanol feeding pipe and a catalyst feeding pipe, the top of the reaction kettle is communicated with a front distillation receiving tank, the bottom of the reaction kettle is communicated with a mixer through a pipeline, and the front distillation receiving tank is communicated with the mixer through a pipeline. A bottom valve is arranged on a pipeline between the reaction kettle and the mixer, the bottom of the mixer is communicated with the top of the storage tank, the bottom of the storage tank is communicated with an inlet of the continuous reactor, and an outlet of the continuous reactor is communicated with the receiving tank through a pipeline. According to the continuous production device disclosed by the utility model, front fractions are removed through pre-distillation, then are fully mixed and then are fed into the continuous reactor for heating reaction through steam, so that continuous production of N-allyl-O-isobutyl thiocarbamate is realized; and meanwhile, the device has the characteristic of continuous and automatic operation, the requirements of manual intervention and operation can be reduced, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of N-allyl-O-isobutylthiocarbamate production, in particular to an N-allyl-O-isobutylthiocarbamate continuous reaction system. Background Art

[0002] N-allyl-O-isobutylthiocarbamate is a commonly used compound in organic synthesis, and is often used as a crosslinker, plasticizer, coating, etc. The current production process of N-allyl-O-isobutylthiocarbamate requires batch production, resulting in low production efficiency. Utility Model Content

[0003] The utility model provides an N-allyl-O-isobutylthiocarbamate continuous reaction system, which is used to solve the defects in the prior art.

[0004] The utility model is realized through the following technical solutions:

[0005] A N-allyl-O-isobutylthiocarbamate continuous reaction system comprises a reactor, wherein the top of the reactor is connected with an allyl isothiocyanate feed pipe, an isobutyl alcohol feed pipe and a catalyst feed pipe, the top of the reactor is connected with a fore-distillation receiving tank, the bottom of the reactor is connected with a mixer through a pipeline, a bottom valve is arranged on the pipeline between the reactor and the mixer, the bottom of the mixer is connected with the top of a storage tank, the bottom of the storage tank is connected with an inlet of a continuous reactor, and the outlet of the continuous reactor is connected with a receiving tank through a pipeline.

[0006] In the above-mentioned N-allyl-O-isobutylthiocarbamate continuous reaction system, a jacket is arranged on the periphery of the reactor to control the temperature inside the reactor.

[0007] In the above-mentioned N-allyl-O-isobutylthiocarbamate continuous reaction system, a steam condensate outlet pipe of the jacket is provided with a steam trap.

[0008] In the above-mentioned N-allyl-O-isobutylthiocarbamate continuous reaction system, a precooling tube is respectively arranged on the pipeline between the reactor and the front distillation receiving tank and on the pipeline between the continuous reactor and the receiving tank.

[0009] In the above-mentioned N-allyl-O-isobutylthiocarbamate continuous reaction system, a safety valve is arranged on the pipeline between the storage tank and the continuous reactor.

[0010] In the above-mentioned N-allyl-O-isobutylthiocarbamate continuous reaction system, a stirring device can be provided in the reaction kettle and the mixer.

[0011] The utility model has the advantages that: the utility model removes the front fraction by pre-distillation, and then sends it into a continuous reactor after sufficient mixing to heat and react by steam to achieve continuous production of N-allyl-O-isobutylthiocarbamate; at the same time, the utility model has the characteristics of continuous and automatic operation, which can reduce the need for manual intervention and operation and reduce labor costs. In addition, since the reaction is carried out continuously, the generation of by-products or wastes in the reaction process is also reduced, thereby reducing waste treatment and cleaning costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a schematic diagram of the structure of the utility model.

[0014] Figure numerals: 1. Reactor; 2. Allyl isothiocyanate feed pipe; 3. Isobutanol feed pipe; 4. Catalyst feed pipe; 5. Fore-distillation receiving tank; 6. Mixer; 7. Bottom valve; 8. Storage tank; 9. Continuous reactor; 10. Receiving tank; 11. Jacket; 12. Steam trap; 13. Precooling pipe; 14. Safety valve. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] A N-allyl-O-isobutylthiocarbamate continuous reaction system comprises a reactor 1, wherein the top of the reactor 1 is connected to an allyl isothiocyanate feed pipe 2, an isobutyl alcohol feed pipe 3 and a catalyst feed pipe 4, the top of the reactor 1 is connected to a fore-distillation receiving tank 5, the bottom of the reactor 1 is connected to a mixer 6 through a pipeline, a bottom valve 7 is arranged on the pipeline between the reactor 1 and the mixer 6, the bottom of the mixer 6 is connected to the top of a storage tank 8, the bottom of the storage tank 8 is connected to an inlet of a continuous reactor 9, and the outlet of the continuous reactor 9 is connected to a receiving tank 10 through a pipeline. When the utility model is used, a specified amount of allyl isothiocyanate and isobutanol are first added into a reactor 1 through an allyl isothiocyanate feed pipe 2 and an isobutanol feed pipe 3, and a front fraction with a lower volatile temperature is distilled into a front fraction receiving tank 5 by heating, and the front fraction is removed and cooled to room temperature, and then a specified amount of catalyst is added through a catalyst feed pipe 4, and then a bottom valve 7 is opened to feed the catalyst into a mixer 6 for mixing, and then the catalyst is fed into a storage tank 8, and then the temperature of a continuous reactor 9 is increased to a specified temperature by steam heat exchange, and then the mixed solution in the storage tank 8 is fed into the continuous reactor 9 for reaction, and the N-allyl-O-isobutylthiocarbamate obtained after the reaction is completed is fed into a receiving tank 10 for storage, and a liquid pump is arranged at a place where power transportation is required on the reaction pipeline, and the liquid pump is driven to ensure the normal progress of the reaction.

[0017] Specifically, the outer periphery of the reactor 1 described in this embodiment is provided with a jacket 11 for controlling the temperature in the reactor 1. The utility model can conveniently heat up or cool down quickly through steam or cooling water through the jacket 11, and can conveniently control the temperature in the reactor 1 through the temperature sensor, thereby conveniently completing the temperature control in the reactor 1.

[0018] Specifically, a steam condensate outlet pipe of the jacket 11 of this embodiment is provided with a steam trap 12. The utility model can avoid pipeline blockage through the steam trap 12 to ensure the normal use of the utility model.

[0019] Furthermore, a precooling pipe 13 is respectively provided on the pipeline between the reactor 1 and the front distillation receiving tank 5 and the pipeline between the continuous reactor 9 and the receiving tank 10. The utility model can conveniently complete the temperature reduction operation through the precooling pipe 13, so as to facilitate the liquefaction of the vaporized front distillation and the product for rapid storage.

[0020] Furthermore, a safety valve 14 is provided on the pipeline between the storage tank 8 and the continuous reactor 9 described in this embodiment. Since the continuous reactor 9 reacts violently, there are great safety hazards when it is used. In the utility model, the safety valve 14 can be added to avoid the safety hazards caused by excessive pressure due to the violent reaction. At the same time, a pressure gauge can be added to monitor the pipeline pressure to ensure safe production.

[0021] Furthermore, a stirring device may be provided in the reactor 1 and the mixer 6 described in this embodiment.

[0022] The utility model can accelerate the distillation and mixing efficiency through the stirring device, thereby improving the production efficiency.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A continuous reaction system of N-allyl-O-isobutylthiocarbamate, characterized in that: The invention comprises a reactor (1), wherein the top of the reactor (1) is connected to an allyl isothiocyanate feed pipe (2), an isobutyl alcohol feed pipe (3) and a catalyst feed pipe (4), the top of the reactor (1) is connected to a fore-distillation receiving tank (5), the bottom of the reactor (1) is connected to a mixer (6) through a pipeline, a bottom valve (7) is arranged on the pipeline between the reactor (1) and the mixer (6), the bottom of the mixer (6) is connected to the top of a storage tank (8), the bottom of the storage tank (8) is connected to the inlet of a continuous reactor (9), and the outlet of the continuous reactor (9) is connected to a receiving tank (10) through a pipeline.

2. The N-allyl-O-isobutylthiocarbamate continuous reaction system according to claim 1, characterized in that: A jacket (11) is arranged on the outer periphery of the reaction kettle (1) for controlling the temperature inside the reaction kettle (1).

3. The N-allyl-O-isobutylthiocarbamate continuous reaction system according to claim 2, characterized in that: A steam condensate outlet pipe of the jacket (11) is provided with a steam trap (12).

4. The N-allyl-O-isobutylthiocarbamate continuous reaction system according to claim 1, characterized in that: A precooling pipe (13) is respectively arranged on the pipeline between the reaction kettle (1) and the front distillation receiving tank (5) and on the pipeline between the continuous reactor (9) and the receiving tank (10).

5. The N-allyl-O-isobutylthiocarbamate continuous reaction system according to claim 1, characterized in that: A safety valve (14) is provided on the pipeline between the storage tank (8) and the continuous reactor (9).

6. The N-allyl-O-isobutylthiocarbamate continuous reaction system according to claim 1, characterized in that: A stirring device may be provided in the reaction kettle (1) and the mixer (6).

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