Pure-chloromethyl mercaptan synthesis equipment

Abstract

Perchloromethyl mercaptan synthesis equipment relates to the technical field of synthesis devices and comprises a tank body, a plurality of communicated reaction zones are arranged in the tank body from top to bottom in parallel, a distributor and a filler are arranged in each reaction zone from top to bottom in parallel, the top of the tank body is connected with a carbon disulfide inlet pipeline, the distributor of each reaction zone is connected with a chlorine inlet pipeline, and the chlorine inlet pipeline is connected with a chlorine outlet pipeline. And a heat transfer system is arranged on the tank body corresponding to each reaction area. The utility model solves the problems that the device in the traditional technology is not timely in heat transfer, the traditional device controls the reaction temperature by controlling the feeding rate, the efficiency is low and certain instability exists in a certain range, and the selectivity is reduced if the heat transfer in the reaction is not timely.

Description

Technical Field

[0001] The utility model relates to the technical field of synthesis devices, in particular to perchloromethyl mercaptan synthesis equipment. Background Art

[0002] Perchloromethylmercaptan, also known as trichlorosulfuric acid chloromethane, is a colorless oily liquid and an intermediate of the pesticides captan, mitotan and other fungicides.

[0003] The prior art discloses a patent with publication number CN103360295A. The solution comprises the following steps: adding carbon disulfide and hydrochloric acid to two chlorination reaction kettles, using kettle 1 as the main chlorination reaction kettle, controlling its temperature at 20-30°C, and introducing chlorine gas to carry out the chlorination reaction; using kettle 2 as a secondary reaction kettle during the chlorination reaction; terminating the reaction when the density of the reaction liquid in kettle 1 reaches 1.65-1.68, transferring the reactants to a treatment kettle after the reaction is completed, and allowing the product to stand for stratification, with the upper layer being the mixed acid and the lower layer being the product perchloromethyl mercaptan; then adding carbon disulfide and hydrochloric acid to kettle 1, which is then used as the secondary reaction kettle and kettle 2 as the main reaction kettle, introducing chlorine gas to carry out the chlorination reaction; and alternately using the two series-connected reaction kettles to recover and capture carbon disulfide to complete the preparation of perchloromethyl mercaptan. This method can effectively recover carbon disulfide and chlorine gas, increase product yield, reduce production costs, and overcome the environmental and human health hazards caused by leakage of carbon disulfide in the prior art.

[0004] As the existing devices are used, the shortcomings of this technology are gradually exposed, mainly in the following aspects:

[0005] First, the existing device does not solve the need for timely heat removal. According to the reaction heat data obtained by our fully automatic reaction calorimeter, the specific heat release of this reaction is 294.6 J / g, which is a large amount of heat release.

[0006] Second, traditional devices control the reaction temperature within a certain range by controlling the feed rate, which is inefficient and has certain instability. Moreover, if the heat of the reaction is not removed in time, the selectivity will decrease.

[0007] As can be seen from the above, the existing technology obviously has inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content

[0008] In response to the defects in the prior art, the utility model provides a perchloromethyl mercaptan synthesis device to solve the problem of untimely heat removal in the traditional device, and the problem that the traditional device controls the reaction temperature by controlling the feed rate, which is low in efficiency within a certain range and has certain instability. In addition, if the heat is not removed in time, the selectivity will decrease.

[0009] In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions.

[0010] The perchloromethyl mercaptan synthesis equipment comprises a tank body, wherein a plurality of interconnected reaction zones are arranged in parallel from top to bottom, and a distributor and a filler are arranged in parallel from top to bottom in each reaction zone.

[0011] The top of the tank is connected to a carbon disulfide inlet pipeline.

[0012] The distributor of each reaction zone is connected to a chlorine gas inlet pipeline,

[0013] The tank body is provided with a heat transfer system corresponding to each reaction zone.

[0014] As an optimized solution, the bottom of the tank body is connected to a product receiving tank.

[0015] As an optimized solution, the product receiving tank is connected to a separation device.

[0016] As an optimized solution, the heat transfer system includes a heat exchange jacket arranged on the outer wall of the tank.

[0017] As an optimized solution, each of the heat exchange jackets is connected to a refrigerant inlet and a refrigerant outlet.

[0018] As an optimized solution, the refrigerant inlet is close to the bottom of the heat exchange jacket.

[0019] As an optimized solution, the refrigerant outlet is close to the top of the heat exchange jacket.

[0020] As an optimized solution, the refrigerant inlet and the refrigerant outlet are separated on opposite outer walls of the heat exchange jacket.

[0021] As an optimized solution, the filler is a vertical tube filler.

[0022] As an optimized solution, the inlet end of the carbon disulfide inlet pipeline is connected to the carbon disulfide storage tank.

[0023] As an optimized solution, the inlet ends of several chlorine gas inlet pipelines are commonly connected to the chlorine gas pipeline.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] Chlorine enters the corresponding distributor through the chlorine feed pipeline and mixes with carbon disulfide from the carbon disulfide feed pipeline in the distributor. After mixing, the materials enter the area where the filler is located. Each reaction section is equipped with a heat transfer system for heat exchange. After the reaction, the materials enter the product receiving tank and then enter the subsequent separation process.

[0026] This technology uses equipment that couples multiple reaction zones, and the chlorine gas enters the reaction device in sections. Distributors and fillers are used in the reaction zones. Since the reaction is an initial reaction with a large amount of heat release, this equipment divides the exothermic reaction into different zones, which is conducive to controlling the reaction temperature within the optimal range and ensuring the reaction selectivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0028] Figure 1 It is a structural diagram of the present utility model.

[0029] In the figure: 1-tank body; 2-distributor; 3-filler; 4-heat exchange jacket; 5-refrigerant inlet; 6-refrigerant outlet; 7-chlorine inlet pipeline; 8-carbon disulfide inlet pipeline; 9-chlorine pipeline; 10-carbon disulfide storage tank; 11-product receiving tank; 12-separation device. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0031] like Figure 1 As shown, the perchloromethyl mercaptan synthesis equipment includes a tank body 1, in which a plurality of interconnected reaction zones are arranged side by side from top to bottom, and in each reaction zone a distributor 2 and a filler 3 are arranged side by side from top to bottom.

[0032] The top of the tank 1 is connected to a carbon disulfide inlet pipeline 8.

[0033] The distributor 2 of each reaction zone is connected to a chlorine gas inlet pipeline 7,

[0034] The tank body 1 is provided with a heat transfer system corresponding to each reaction zone.

[0035] The bottom of the tank body 1 is connected to a product receiving tank 11 .

[0036] The product receiving tank 11 is connected to the separation device 12 .

[0037] The heat transfer system includes a heat exchange jacket 4 arranged on the outer wall of the tank body 1.

[0038] Each heat exchange jacket 4 is connected to a refrigerant inlet 5 and a refrigerant outlet 6 .

[0039] The refrigerant inlet 5 is close to the bottom of the heat exchange jacket 4 .

[0040] The refrigerant outlet 6 is close to the top of the heat exchange jacket 4 .

[0041] The refrigerant inlet 5 and the refrigerant outlet 6 are located on opposite outer walls of the heat exchange jacket 4 .

[0042] The packing 3 is a vertical tube type packing 3.

[0043] The inlet end of the carbon disulfide inlet pipeline 8 is connected to the carbon disulfide storage tank 10 .

[0044] The inlet ends of several chlorine gas inlet pipelines 7 are commonly connected to a chlorine gas pipeline 9 .

[0045] The working principle of this device is:

[0046] Chlorine enters the corresponding distributor 2 through the chlorine feed pipeline and mixes with carbon disulfide from the carbon disulfide feed pipeline in the distributor 2. After mixing, the material enters the area where the filler 3 is located. Each reaction section is equipped with a heat transfer system for heat exchange. After the reaction, the material enters the product receiving tank 11 and enters the subsequent separation process.

[0047] This technology uses a device that couples multiple reaction zones, and the chlorine gas enters the reaction device in sections. The reaction zones use distributors 2 and fillers 3. Since the reaction is an initial reaction with a large amount of heat release, this device divides the exothermic reaction into different zones, which is conducive to controlling the reaction temperature within the optimal range and ensuring the reaction selectivity.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. Perchloromethylmercaptan synthesis equipment, characterized in that: The invention comprises a tank body (1), wherein a plurality of interconnected reaction zones are arranged side by side from top to bottom in the tank body (1), and a distributor (2) and a filler (3) are arranged side by side from top to bottom in each reaction zone. The top of the tank (1) is connected to a carbon disulfide inlet pipeline (8). The distributor (2) of each reaction zone is connected to a chlorine gas inlet pipeline (7), The tank body (1) is provided with a heat transfer system corresponding to each reaction zone.

2. The perchloromethyl mercaptan synthesis equipment according to claim 1, wherein: The bottom of the tank body (1) is connected to a product receiving tank (11).

3. The perchloromethyl mercaptan synthesis equipment according to claim 2, wherein: The product receiving tank (11) is connected to a separation device (12).

4. The perchloromethyl mercaptan synthesis equipment according to claim 1, wherein: The heat transfer system comprises a heat exchange jacket (4) arranged on the outer wall of the tank body (1).

5. The perchloromethyl mercaptan synthesis equipment according to claim 4, characterized in that: Each of the heat exchange jackets (4) is connected to a refrigerant inlet (5) and a refrigerant outlet (6).

6. The perchloromethyl mercaptan synthesis equipment according to claim 5, characterized in that: The refrigerant inlet (5) is close to the bottom of the heat exchange jacket (4); and the refrigerant outlet (6) is close to the top of the heat exchange jacket (4).

7. The perchloromethyl mercaptan synthesis equipment according to claim 5, characterized in that: The refrigerant inlet (5) and the refrigerant outlet (6) are located separately on opposite outer walls of the heat exchange jacket (4).

8. The perchloromethylmercaptan synthesis equipment according to claim 1, characterized in that: The filler (3) is a vertical tube filler (3).

9. The perchloromethyl mercaptan synthesis equipment according to claim 1, characterized in that: The inlet end of the carbon disulfide inlet pipeline (8) is connected to the carbon disulfide storage tank (10).

10. The perchloromethylmercaptan synthesis equipment according to claim 1, characterized in that: The inlet ends of the plurality of chlorine gas inlet pipelines (7) are commonly connected to a chlorine gas pipeline (9).

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