A device and method for separating components in a tear gas grenade

CN118729880BActive Publication Date: 2026-10-09CHINESE PEOPLES LIBERATION ARMY UNIT 61699
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Patent Information

Application Number
CN202410708052.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-03
Publication Date
2026-10-09
Estimated Expiration
2044-06-03

AI Technical Summary

Technical Problem

[0003]本发明专利的目的在于提供一种催泪弹中组分分离方法及装置,以解决催泪弹焚烧销毁带来的环境污染和资源 浪费等问题

Benefits of technology

1实现催泪弹组分的全分离,分离出的CS和RDX可用于制作催泪弹的材料,也可以用作其它用处,避免资源的浪费;

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Abstract

The present application relates to the field of green disposal of obsolete ammunition, in particular to a method and device for separating components in tear gas shells. The separation device comprises an ultrasonic extraction kettle, a solvent tank A, an ultrasonic device, a condensation reflux pipe, a filter A, a distillation kettle I, a solvent tank B, a solvent receiving tank A, a filter B, a first condenser, a distillation kettle II, a solvent tank C, a solvent receiving tank B, a filter C, a second condenser, a vacuum unit, a buffer tank, a tail gas absorption tower, a nitrogen pipeline, a circulating cold water reflux, a circulating cold water inlet, a water pipe, a hot water inlet, a hot water outlet and a vacuum pipeline. The device can realize full separation of components in tear gas shells, and the separated CS and RDX can be used to make tear gas shell materials or for other purposes, avoiding resource waste; the solvents used in the entire process can be reused, avoiding environmental pollution.
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Description

Technical Field

[0001] This invention relates to the field of green disposal of waste ammunition, specifically to a method and apparatus for separating components from tear gas canisters. Background Technology

[0002] Currently, chemical defense warehouses store large quantities of decommissioned explosive tear gas grenades. Some exhibit abnormalities such as damaged packaging, aging of all grenades and component parts, and leakage of the active ingredient. The tactical and technical performance of these products is highly uncertain, posing storage safety hazards and requiring urgent and proper handling. Current methods for disposing of tear gas include incineration, explosion, and chemical methods, all of which suffer from drawbacks such as significant secondary pollution, low safety, and high processing costs. Applications (202122136331.6, "A System for Destroying Tear Gas"; 201921743417.1, "An Automatic Destruction Device for Mobile Explosives") completely destroy munitions through incineration or explosion, which does not align with the concept of safe and environmentally friendly "sustainable development" and results in significant resource waste. Therefore, considering the component characteristics of decommissioned tear gas grenades, this paper proposes a method to recover and reuse components by adding different solvents under different conditions. This approach breaks away from the simplistic and crude destruction methods and aligns with the development direction of carbon neutrality. Summary of the Invention

[0003] The purpose of this invention patent is to provide a method and apparatus for separating components from tear gas canisters, so as to solve the problems of environmental pollution and resource waste caused by the incineration and destruction of tear gas canisters.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a component separation device for tear gas, comprising an ultrasonic extraction vessel 1, a solvent tank A101, an ultrasonic device 102, a condenser reflux pipe 103 and a filter A104, a distillation vessel I2, a solvent tank B201, a solvent receiving tank A202, a filter B203, a first condenser 204, a distillation vessel II3, a solvent tank C301, a solvent receiving tank B302, a filter C303, a second condenser 304, a vacuum unit 4, a buffer tank 401, a tail gas absorption tower 402, a nitrogen pipeline 501, a circulating cold water reflux 502, a circulating cold water inlet 503, a water pipe 504, a hot water inlet 505, a hot water outlet 506, and a vacuum pipeline 507; The nitrogen pipeline 501 is connected to the ultrasonic extraction vessel 1, the distillation vessel I2 and the distillation vessel II3 respectively; The circulating cold water return 502 and circulating cold water inlet 503 are connected in parallel with the condensate return pipe 103, the first condenser 204, the second condenser 304 and the tail gas absorption tower 402 to form a circulating pipeline. The water pipe 504 is connected to the tail gas absorption tower 402; The hot water inlet 505 and hot water outlet 506 are connected in parallel with the ultrasonic extraction vessel 1, filter A104, distillation vessel I2, and distillation vessel II3 to form a circulation pipeline; The vacuum pipeline 507 is connected in parallel to the ultrasonic extraction vessel 1, solvent tank A101, distillation vessel I2, solvent tank B201, distillation vessel II3, and solvent tank C301. The inlet of the nitrogen pipeline 501 is connected to the buffer tank 401, the buffer tank 401 is connected to the vacuum unit 4, and the vacuum unit 4 is connected to the tail gas absorption tower 402. The ultrasonic extraction vessel 1 is connected to the solvent tank A101 on the side and to the filter A104 at the bottom. The ultrasonic extraction vessel 1 is equipped with an ultrasonic device 102 and a hand hole. The ultrasonic extraction vessel 1 is in contact with the condenser reflux pipe 103. The filter A104 is connected to the distillation vessel I2; the top of the distillation vessel I2 is connected to the first condenser 204, the first condenser 204 is connected to the solvent receiving tank A202, the solvent receiving tank A202 is connected to the solvent tank A101; the solvent tank B201 is connected to the side wall of the distillation vessel I2, and the bottom of the distillation vessel I2 is connected to the filter B203. The filter B203 is connected to the distillation vessel II3; the top of the distillation vessel II3 is connected to the second condenser 304, the second condenser 304 is connected to the solvent receiving tank B302, the solvent receiving tank B302 is connected to the solvent tank B201; the solvent tank C301 is connected to the side wall of the distillation vessel II3, and the bottom of the distillation vessel II3 is connected to the filter C303. The bottom of filter C303 is connected to solvent tank C301.

[0005] Preferably, the filters A104, B203 and C303 are bag filters.

[0006] Preferably, the ultrasonic extraction vessel 1 is made of stainless steel; the ultrasonic extraction vessel 1 is equipped with a mechanical seal, an explosion-proof geared motor and a propeller-type double-layer stirrer, and the material of the stirring part in contact with the material is brass; the vessel is equipped with an ultrasonic device, and the bottom of the vessel is equipped with a quick-opening and bottom plate filter device; the vessel is jacketed and equipped with a standard thermometer port; the working pressure is 0.2 to 0.3 MPa.

[0007] Preferably, solvent tanks A101, B201, and C301 are all made of stainless steel and equipped with glass plate-type on-site liquid level indicators; the first condenser 204 and the second condenser 304 are both shell-and-tube condensers; the solvent receiving tanks A202 and B302 are both made of stainless steel and equipped with glass plate-type on-site liquid level indicators, with a working pressure of 0.2 to 0.3 MPa.

[0008] Preferably, both distillation kettle I2 and distillation kettle II3 are made of stainless steel; equipped with mechanical seals, 1.5KW explosion-proof motors and anchor-type agitators, the agitator and material contact parts are made of brass, equipped with frequency converters for stepless speed regulation; the kettle is jacketed and equipped with a standard thermometer port; the kettle bottom is a standard elliptical bottom and equipped with a discharge port; the working pressure is 0.2~0.3MPa.

[0009] Secondly, the present invention provides a method for using the component separation device for tear gas described in the first aspect, specifically including the following steps: S1: By reducing the vacuum level of vacuum pipe 507, solvent A is drawn into solvent tank A101. Then, the ultrasonic extraction vessel 1 containing the main charge of tear gas is placed from solvent tank A101. Stirring is started, and tear gas material is added through the manhole. The ultrasonic extraction vessel 1 is heated to 55-60°C through hot water circulation from hot water inlet 505 and hot water outlet 506 for 1-2 hours. During this period, the reflux pipe 103 is kept to reflux solvent A. S2: After extraction is complete, close the other valves of ultrasonic extraction vessel 1, open the valve of nitrogen pipeline 501 connected to ultrasonic extraction vessel 1, maintain nitrogen at 0.2-0.3 MPa, and filter PVC through filter A104 at 55-60℃. The filtrate is sent to distillation vessel I2. After ultrasonic extraction vessel 1 stops stirring, solvent A is pressed into solvent tank A101 to wash the filter cake and blow it dry. S3: Start stirring in distillation kettle I2, distill solvent A under normal pressure by heating with hot water, and condense solvent A into solvent receiving tank A202 by first condenser 204. After completion, stop stirring and turn on the vacuum system to remove solvent A from distillation kettle I2. S4: By reducing the vacuum level of vacuum pipe 507, solvent B is drawn into solvent tank B201, and then solvent B is added to distillation vessel I2. Stirring is started and carried out at room temperature for 0.5 to 1 hour. Then, nitrogen is used to filter the filter with nitrogen through nitrogen pipe 501 and filtered through filter B203. After filtration, the filter cake is washed by adding solvent B and dried with nitrogen. The RDX filtered through filter B203 is then removed. S5: Stir the distillation kettle I2, and distill the solvent B under normal pressure by heating with hot water. The solvent B is condensed and refluxed to the solvent receiving tank B302 through the second condenser 304. When it is almost finished, turn on the vacuum system to remove the solvent B in the kettle. S6: Draw solvent C from solvent tank C301 into distillation vessel II3 and start stirring. Stir at room temperature for 0.5 to 1 hour; turn on circulating cold water reflux 502 and circulating cold water inlet 503 to cool distillation vessel II3 to 1 to 5°C, filter with nitrogen pressure, and filter through filter C303; after filtration, draw in solvent C again to wash the walls of distillation vessel II3 and filter cake, and blow the filter cake dry with nitrogen; remove the filter bag of filter C303 and the filtered CS. Solvent A and solvent C are alcohol-based organic solvents; solvent B is a chloroalkane-based organic solvent.

[0010] Preferably, the solvent receiving tank A202, solvent receiving tank B302 and filter C303 transport the collected solvents A, B and C back to solvent tank A101, solvent tank B201 and solvent tank C301 respectively.

[0011] Preferably, solvents A, B, and C are anhydrous methanol, chloroform, and anhydrous ethanol, respectively.

[0012] Furthermore, the ratio of anhydrous methanol to the main charge is 35:1 L / kg, the ratio of chloroform to anhydrous ethanol ...

[0013] The beneficial effects of this invention are: 1. Achieve complete separation of tear gas components. The separated CS and RDX can be used as materials for making tear gas or for other purposes, thus avoiding waste of resources. 2. The solvents used in the entire process can be reused, avoiding environmental pollution; 3. The entire device meets the requirements of the tear gas component separation process. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a flowchart of the tear gas component separation process. Detailed Implementation Example 1

[0016] A component separation device for tear gas includes an ultrasonic extraction vessel 1, a solvent tank A101, an ultrasonic device 102, a condenser reflux pipe 103 and a filter A104, a distillation vessel I2, a solvent tank B201, a solvent receiving tank A202, a filter B203, a first condenser 204, a distillation vessel II3, a solvent tank C301, a solvent receiving tank B302, a filter C303, a second condenser 304, a vacuum unit 4, a buffer tank 401, a tail gas absorption tower 402, a nitrogen pipeline 501, a circulating cold water reflux 502, a circulating cold water inlet 503, a water pipe 504, a hot water inlet 505, a hot water outlet 506, and a vacuum pipeline 507. The nitrogen pipeline 501 is connected to the ultrasonic extraction vessel 1, the distillation vessel I2 and the distillation vessel II3 respectively; The circulating cold water return 502 and circulating cold water inlet 503 are connected in parallel with the condensate return pipe 103, the first condenser 204, the second condenser 304 and the tail gas absorption tower 402 to form a circulating pipeline. The water pipe 504 is connected to the tail gas absorption tower 402; The hot water inlet 505 and hot water outlet 506 are connected in parallel with the ultrasonic extraction vessel 1, filter A104, distillation vessel I2, and distillation vessel II3 to form a circulation pipeline; The vacuum pipeline 507 is connected in parallel to the ultrasonic extraction vessel 1, solvent tank A101, distillation vessel I2, solvent tank B201, distillation vessel II3, and solvent tank C301. The inlet of the nitrogen pipeline 501 is connected to the buffer tank 401, the buffer tank 401 is connected to the vacuum unit 4, and the vacuum unit 4 is connected to the tail gas absorption tower 402. The ultrasonic extraction vessel 1 is connected to the solvent tank A101 on the side and to the filter A104 at the bottom. The ultrasonic extraction vessel 1 is equipped with an ultrasonic device 102 and a hand hole. The ultrasonic extraction vessel 1 is in contact with the condenser reflux pipe 103. The filter A104 is connected to the distillation vessel I2; the top of the distillation vessel I2 is connected to the first condenser 204, the first condenser 204 is connected to the solvent receiving tank A202, the solvent receiving tank A202 is connected to the solvent tank A101; the solvent tank B201 is connected to the side wall of the distillation vessel I2, and the bottom of the distillation vessel I2 is connected to the filter B203. The filter B203 is connected to the distillation vessel II3; the top of the distillation vessel II3 is connected to the second condenser 304, the second condenser 304 is connected to the solvent receiving tank B302, the solvent receiving tank B302 is connected to the solvent tank B201; the solvent tank C301 is connected to the side wall of the distillation vessel II3, and the bottom of the distillation vessel II3 is connected to the filter C303. The bottom of filter C303 is connected to solvent tank C301.

[0017] The filters A104, B203 and C303 are bag filters.

[0018] The ultrasonic extraction vessel 1 is made of stainless steel; the ultrasonic extraction vessel 1 is equipped with a mechanical seal, an explosion-proof geared motor and a propeller-type double-layer stirrer, and the material of the stirring and material contact parts is made of brass; the vessel is equipped with an ultrasonic device, and the bottom of the vessel is equipped with a quick-opening and bottom plate filter device; the vessel is jacketed and equipped with a standard thermometer port; the working pressure is 0.2 to 0.3 MPa.

[0019] Solvent tanks A101, B201, and C301 are all made of stainless steel and equipped with glass plate-type on-site liquid level indicators.

[0020] Both distillation kettles I2 and II3 are made of stainless steel; equipped with mechanical seals, 1.5KW explosion-proof motors and anchor-type agitators, with the agitator and material contact parts made of brass, and equipped with frequency converters for stepless speed regulation; the kettles are jacketed and equipped with standard thermometer ports; the kettle bottom is a standard elliptical bottom and equipped with a discharge port; the working pressure is 0.2~0.3MPa.

[0021] Both the first condenser 204 and the second condenser 304 are shell-and-tube condensers.

[0022] Both solvent receiving tanks A202 and B302 are made of stainless steel and equipped with glass plate-type on-site liquid level indicators. The working pressure is 0.2 to 0.3 MPa. Example 2

[0023] The method of using the tear gas component separation device described in Example 1 specifically includes the following steps: S1: By reducing the vacuum level of vacuum pipe 507, solvent A is drawn into solvent tank A101. Then, the ultrasonic extraction vessel 1 containing the main charge of tear gas is placed from solvent tank A101. Stirring is started, and tear gas material is added through the manhole. The ultrasonic extraction vessel 1 is heated to 55-60°C through hot water circulation from hot water inlet 505 and hot water outlet 506 for 1-2 hours. During this period, the reflux pipe 103 is kept to reflux solvent A. S2: After extraction is complete, close the other valves of ultrasonic extraction vessel 1, open the valve of nitrogen pipeline 501 connected to ultrasonic extraction vessel 1, maintain nitrogen at 0.2-0.3 MPa, and filter PVC through filter A104 at 55-60℃. The filtrate is sent to distillation vessel II3. After ultrasonic extraction vessel 1 stops stirring, solvent A is pressed into solvent tank A101 to wash the filter cake and blow it dry. S3: Start the distillation kettle II3 and stir. Distill solvent A under normal pressure by heating with hot water. After passing through the first condenser 204, the solvent A is condensed and refluxed to the solvent receiving tank A202. After the process is completed, stop stirring and turn on the vacuum system to remove the solvent A from the distillation kettle II3. S4: By reducing the vacuum level of vacuum pipe 507, solvent B is drawn into solvent tank B201, and then solvent B is added to distillation vessel II3. Stirring is started and stirred at room temperature for 0.5 to 1 hour. Then, nitrogen is introduced through nitrogen pipe 501 for pressure filtration, and the filter is filtered through filter B203. After filtration, the filter cake is washed by adding solvent B and dried with nitrogen. The RDX filtered through filter B203 is then removed. S5: Stir the distillation vessel II3, and distill solvent B under normal pressure by heating with hot water. The solvent B is condensed and refluxed to the solvent receiving tank B302 through the second condenser 304. When it is almost finished, turn on the vacuum system to remove the solvent B in the vessel. S6: Draw solvent C from solvent tank C301 into distillation vessel II3 and start stirring. Stir at room temperature for 0.5 to 1 hour; turn on circulating cold water reflux 502 and circulating cold water inlet 503 to cool distillation vessel II3 to 5°C, filter with nitrogen pressure, and filter through filter C303; after filtration, draw in solvent C again to wash the vessel wall and filter cake of distillation vessel II3, and blow the filter cake dry with nitrogen; remove the filter bag of filter C303 and the filtered CS.

[0024] The solvent receiving tanks A202 and B302 and the filter C303 will transport the collected solvents A, B and C back to solvent tanks A101, B201 and C301 respectively.

[0025] Solvents A, B, and C are anhydrous methanol, chloroform, and anhydrous ethanol, respectively. The ratio of anhydrous methanol to the main charge is 35:1 L / kg, the ratio of chloroform is 3.5:1 L / kg, and the ratio of anhydrous ethanol is 2.5:1 L / kg, thereby achieving efficient resource recovery and continuous and stable operation of the process.

[0026] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A device for separating components in tear gas, characterized in that, Includes an ultrasonic extraction vessel (1), a solvent tank A (101), an ultrasonic device (102), a condenser reflux pipe (103) and a filter A (104), a distillation vessel I (2), a solvent tank B (201), a solvent receiving tank A (202), a filter B (203), a first condenser (204), a distillation vessel II (3), a solvent tank C (301), a solvent receiving tank B (302), a filter C (303), a second condenser (304), a vacuum unit (4), a buffer tank (401), a tail gas absorption tower (402), a nitrogen pipeline (501), a circulating cold water reflux pipe (502), a circulating cold water inlet (503), a water pipe (504), a hot water inlet (505), a hot water outlet (506), and a vacuum pipeline (507); The nitrogen pipeline (501) is connected to the ultrasonic extraction vessel (1), distillation vessel I (2) and distillation vessel II (3) respectively. The circulating cold water return (502) and circulating cold water inlet (503) are connected in parallel with the condensate return pipe (103), the first condenser (204), the second condenser (304) and the tail gas absorption tower (402) to form a circulating pipeline; The water pipe (504) is connected to the tail gas absorption tower (402); The hot water inlet (505) and hot water outlet (506) are connected in parallel with the ultrasonic extraction vessel (1), filter A (104), distillation vessel I (2), and distillation vessel II (3) to form a circulation pipeline; The vacuum pipeline (507) is connected in parallel to the ultrasonic extraction vessel (1), solvent tank A (101), distillation vessel I (2), solvent tank B (201), distillation vessel II (3), and solvent tank C (301). The inlet of the nitrogen pipeline (501) is connected to the buffer tank (401). The buffer tank (401) is connected to the vacuum unit (4). The vacuum unit (4) is connected to the tail gas absorption tower (402). The ultrasonic extraction vessel (1) is connected to the solvent tank A (101) on the side and to the filter A (104) at the bottom. The ultrasonic extraction vessel (1) is equipped with an ultrasonic device (102) and a hand hole. The ultrasonic extraction vessel (1) is in contact with the condenser reflux pipe (103). The filter A (104) is connected to the distillation vessel I (2); the top of the distillation vessel I (2) is connected to the first condenser (204), the first condenser (204) is connected to the solvent receiving tank A (202), the solvent receiving tank A (202) is connected to the solvent tank A (101); the solvent tank B (201) is connected to the side wall of the distillation vessel I (2), and the bottom of the distillation vessel I (2) is connected to the filter B (203); The filter B (203) is connected to the distillation vessel II (3); the top of the distillation vessel II (3) is connected to the second condenser (304), the second condenser (304) is connected to the solvent receiving tank B (302), the solvent receiving tank B (302) is connected to the solvent tank B (201); the solvent tank C (301) is connected to the side wall of the distillation vessel II (3), and the bottom of the distillation vessel II (3) is connected to the filter C (303); The bottom of filter C (303) is connected to solvent tank C (301).

2. The tear gas canister component separation device according to claim 1, characterized in that, The filters A (104), B (203) and C (303) are bag filters.

3. The tear gas canister component separation device according to claim 1, characterized in that, The ultrasonic extraction vessel (1) is made of stainless steel; the ultrasonic extraction vessel (1) is equipped with a mechanical seal, an explosion-proof geared motor and a propulsion double-layer stirrer, and the material of the stirring and material contact part is brass; the vessel is equipped with an ultrasonic device, and the bottom of the vessel is equipped with a quick-opening and bottom plate filter device; the vessel is equipped with a jacket and a standard thermometer port; the working pressure is 0.2 to 0.3 MPa.

4. The tear gas canister component separation device according to claim 1, characterized in that, Solvent tanks A (101), B (201), and C (301) are all made of stainless steel and equipped with glass plate-type on-site liquid level indicators; the first condenser (204) and the second condenser (304) are both shell-and-tube condensers; solvent receiving tanks A (202) and B (302) are both made of stainless steel and equipped with glass plate-type on-site liquid level indicators, with a working pressure of 0.2 to 0.3 MPa.

5. The tear gas canister component separation device according to claim 1, characterized in that, The distillation kettles I (2) and II (3) are made of stainless steel; equipped with a mechanical seal 1.5KW explosion-proof motor and anchor-type agitator; the part of the agitator that comes into contact with the material is made of brass and equipped with a frequency converter for stepless speed regulation; the kettle is jacketed and equipped with a standard thermometer port; the bottom of the kettle is a standard elliptical bottom and equipped with a discharge port; the working pressure is 0.2~0.3MPa.

6. A method for separating components in tear gas using the separation device according to any one of claims 1 to 5, characterized in that, Specifically, the steps include the following: S1: By reducing the vacuum level of the vacuum pipe (507), solvent A is drawn into solvent tank A (101), and then the ultrasonic extraction vessel (1) containing the main charge of tear gas is placed from solvent tank A (101). Stirring is started, and tear gas material is added from the hand hole. The ultrasonic extraction vessel (1) is heated to 55-60°C through the hot water circulation of the hot water inlet (505) and hot water outlet (506) for 1-2 hours. During this period, the condenser reflux pipe (103) is kept to reflux solvent A. S2: After extraction, close the other valves of the ultrasonic extraction vessel (1), open the valve of the nitrogen pipeline (501) connected to the ultrasonic extraction vessel (1), maintain nitrogen at 0.2-0.3 MPa, filter the PVC through filter A (104) at 55-60℃, and send the filtrate to distillation vessel II (3); After the ultrasonic extraction vessel (1) stops stirring, press solvent A from solvent tank A (101) to wash the filter cake and blow it dry; S3: Start the distillation vessel I (2) and stir. Distill solvent A under normal pressure by heating with hot water. After passing through the first condenser (204), the solvent A is condensed and refluxed to the solvent receiving tank A (202). After the end, stop stirring and turn on the vacuum system to remove the solvent A from the distillation vessel I (2). S4: By reducing the vacuum level of the vacuum pipe (507), solvent B is drawn into solvent tank B (201), and then solvent B is added to distillation vessel I (2). Stirring is started and stirred at room temperature for 0.5 to 1 hour. Then, nitrogen is used to filter the filter by nitrogen pressure through nitrogen pipe (501) and filtered through filter B (203). After filtration, the filter cake is washed by adding solvent B and dried with nitrogen. The RDX filtered by filter B (203) is then removed. S5: Open the distillation vessel I (2) and stir. Distill solvent B under normal pressure by heating with hot water. After passing through the second condenser (304), the solvent B is condensed and refluxed to the solvent receiving tank B (302). When it is almost finished, open the vacuum system to remove the solvent B in the vessel. S6: Draw solvent C from solvent tank C (301) into distillation vessel II (3) and start stirring. Stir at room temperature for 0.5 to 1 hour; turn on circulating cold water reflux (502) and circulating cold water inlet (503) to cool distillation vessel II (3) by 1 to 5°C, filter with nitrogen pressure, and filter through filter C (303); after filtration, draw in solvent C again to wash the vessel wall and filter cake of distillation vessel II (3), and blow the filter cake dry with nitrogen; take out the filter bag of filter C (303) and the filtered CS; Solvent A and solvent C are alcohol-based organic solvents; solvent B is a chloroalkane-based organic solvent.

7. The method for separating components from tear gas according to claim 6, characterized in that, The solvent receiving tank A (202), solvent receiving tank B (302) and filter C (303) will transport the collected solvents A, B and C back to solvent tank A (101), solvent tank B (201) and solvent tank C (301) respectively.

8. The method for separating components from tear gas canisters according to claim 6, characterized in that, The solvents A, B, and C are anhydrous methanol, chloroform, and anhydrous ethanol, respectively.

9. The method for separating components from tear gas according to claim 8, characterized in that, The ratio of anhydrous methanol to the main charge is 35:1 (L / kg), the ratio of chloroform is 3.5:1 (L / kg), and the ratio of anhydrous ethanol is 2.5:1 (L / kg).

10. The method for separating components from tear gas according to claim 6, characterized in that, The entire device is equipped with a jacketed insulation system to prevent the extracted material from crystallizing within the device.

Citation Information

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