CN215540842U - Synthesis device of thioglycollic acid - Google Patents
Synthesis device of thioglycollic acid Download PDFInfo
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- CN215540842U CN215540842U CN202121368002.8U CN202121368002U CN215540842U CN 215540842 U CN215540842 U CN 215540842U CN 202121368002 U CN202121368002 U CN 202121368002U CN 215540842 U CN215540842 U CN 215540842U
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Abstract
The utility model discloses a device for synthesizing thioglycollic acid. The utility model comprises a first reaction kettle, an alkali absorption tower and a second reaction kettle; the first reaction kettle comprises a first tank body, a pressure control assembly, a temperature control assembly and a first stirring assembly, wherein a first gas outlet is arranged in the first tank body and is communicated with the alkali absorption tower through a first gas pipeline, and a first valve body is arranged on the first gas pipeline; the second reaction kettle comprises a second tank body and a second stirring assembly, the first tank body is communicated with the second tank body through a liquid pipeline, a second valve body is arranged on the liquid pipeline, the second tank body is provided with a hydrochloric acid adding port and a second gas outlet, the second gas outlet is communicated with the alkali absorption tower through a second gas pipeline, and a third valve body is arranged on the second gas pipeline. The utility model can compress the hydrogen sulfide gas generated in the reaction process to liquid state to participate in the reaction by controlling the reaction temperature and the reaction pressure, so as to improve the reaction yield to 89 percent and greatly reduce the use amount of sodium hydrosulfide and liquid caustic soda at the same time.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to a synthetic device of thioglycollic acid.
Background
Under the conventional reaction conditions in the process of synthesizing thioglycollic acid by using sodium hydrosulfide and chloroacetic acid as raw materials, the conversion rate of chloroacetic acid is lower than 80%, and a large amount of hydrogen sulfide is also contained in tail gas, so that the problems of how to improve the conversion rate of chloroacetic acid, recovering hydrogen sulfide, reducing raw material consumption and energy consumption, lowering operation and construction costs and reducing pollutant discharge are urgently solved at present.
SUMMERY OF THE UTILITY MODEL
The present invention aims to provide a thioglycollic acid synthesis apparatus which can improve the reaction yield and greatly reduce the consumption of raw materials, aiming at the defects of the prior art.
The utility model relates to a synthesis device of thioglycollic acid, which comprises a first reaction kettle, an alkali absorption tower and a second reaction kettle; the first reaction kettle comprises a first tank body, a pressure control assembly, a temperature control assembly and a first stirring assembly, wherein the pressure control assembly is used for adjusting the internal pressure of the first tank body, the temperature control assembly is used for adjusting the internal temperature of the first tank body, the first stirring assembly is used for stirring and mixing materials in the first tank body, a first gas outlet is formed in the first tank body, the first gas outlet is communicated with the alkali absorption tower through a first gas pipeline, and a first valve body is arranged on the first gas pipeline; the second reaction kettle comprises a second tank body and a second stirring assembly, the second stirring assembly is used for stirring and mixing materials in the second tank body, the first tank body is communicated with the second tank body through a liquid pipeline, a second valve body is arranged on the liquid pipeline, the second tank body is provided with a hydrochloric acid inlet and a second gas outlet which are communicated with the inside of the second tank body, the second gas outlet is communicated with the alkali absorption tower through a second gas pipeline, and a third valve body is arranged on the second gas pipeline.
Furthermore, the pressure control assembly comprises a pressure sensor and a controller, the first valve body is an electromagnetic pressure regulating valve, the pressure sensor is arranged in the first tank body, and the controller is electrically connected with the pressure sensor and the first valve body.
Further, the first jar of body is the intermediate layer jar, the outer wall of the first jar of body is equipped with water inlet and delivery port rather than the intermediate layer is linked together, the cold water source with the water inlet is linked together, accuse temperature subassembly includes flow valve and temperature sensor, the flow valve sets up the water inlet, temperature sensor sets up first jar is internal.
Further, the flow valve is an electromagnetic valve, and the controller is electrically connected with the flow valve and the temperature sensor.
Further, first stirring subassembly includes first motor and first stirring rake, the one end of first stirring rake is located first jar is internal, and the other end stretches out first jar of body with first motor drive is connected, first motor sets up the top of first jar of body.
Further, the second stirring subassembly includes second motor and second stirring rake, the one end of second stirring rake is located the second jar is internal, and the other end stretches out the second jar of body with the second motor transmission is connected, the second motor sets up the top of the second jar of body.
Furthermore, an acid corrosion prevention layer is arranged on the inner side wall of the second tank body.
The synthetic process of the thioglycollic acid synthesis device is as follows: adding the prepared sodium hydrosulfide and chloroacetic acid solution into a first reaction kettle, setting the reaction pressure in the first reaction kettle to be 4-4.5Mpa, reducing the temperature through a temperature control assembly, controlling the reaction temperature to be 40-55 ℃, and starting a stirring assembly to react for 30 minutes; excessive hydrogen sulfide generated by the reaction enters an alkali absorption tower through a first gas pipeline, liquid alkali for absorption can adopt a sodium hydroxide solution with the content of 32%, and sodium hydrosulfide generated in the absorption process can be prepared into a solution with certain solubility and then added into a first reaction kettle for reuse; transferring the mixed solution generated in the first reaction kettle into a second reaction kettle, adding a certain amount of 30-32% concentrated hydrochloric acid solution from a hydrochloric acid inlet, uniformly stirring and mixing, carrying out acidification reaction for 1 hour, connecting a second gas outlet to an alkali absorption tower, and preparing the sodium hydrosulfide generated in the absorption process into a solution with a certain solubility and adding the solution into the first reaction kettle for reuse.
The synthesis device of thioglycollic acid disclosed by the utility model can be used for compressing hydrogen sulfide gas generated in the reaction process to be in a liquid state to participate in the reaction by controlling the reaction temperature and the reaction pressure, so that the reaction yield can be increased to 89%, and meanwhile, the use amounts of sodium hydrosulfide and liquid alkali are greatly reduced.
Drawings
FIG. 1 is a schematic structural view of a mercaptoacetic acid synthesis apparatus according to the present invention.
1. A first reaction kettle; 11. a first tank; 111. a first air outlet; 112. a water inlet; 113. a water outlet; 12. a pressure control assembly; 121. a pressure sensor; 122. a controller; 13. a temperature control assembly; 131. a flow valve; 132. a temperature sensor; 14. a first stirring assembly; 141. a first motor; 142. a first stirring paddle; 2. an alkali absorption tower; 3. a second reaction kettle; 31. a second tank; 311. a hydrochloric acid inlet; 312. a second air outlet; 32. a second stirring assembly; 321. a second motor; 322. a second stirring paddle; 4. a first gas line; 41. a first valve body; 5. a liquid line; 51. a second valve body; 6. a second gas line; 61. a third valve body.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, the apparatus for synthesizing thioglycolic acid of the present invention comprises a first reaction vessel 1, an alkali absorption tower 2 and a second reaction vessel 3; the first reaction kettle 1 comprises a first tank 11, a pressure control assembly 12, a temperature control assembly 13 and a first stirring assembly 14, wherein the pressure control assembly 12 is used for adjusting the internal pressure of the first tank 11, the temperature control assembly 13 is used for adjusting the temperature control assembly 13 of the internal temperature of the first tank 11, the first stirring assembly 14 is used for stirring and mixing materials in the first tank 11, a first gas outlet 111 is arranged in the first tank 11, the first gas outlet 111 is communicated with the alkali absorption tower 2 through a first gas pipeline 4, and a first valve body 41 is arranged on the first gas pipeline 4; the second reaction kettle 3 comprises a second tank 31 and a second stirring component 32, the second stirring component 32 is used for stirring and mixing materials in the second tank 31, the first tank 11 is communicated with the second tank 31 through a liquid pipeline 5, a second valve body 51 is arranged on the liquid pipeline 5, the second tank 31 is provided with a hydrochloric acid inlet 311 and a second gas outlet 312 which are communicated with the interior of the second tank, the second gas outlet 312 is communicated with the alkali absorption tower 2 through a second gas pipeline 6, and a third valve body 61 is arranged on the second gas pipeline 6.
The synthetic process of the thioglycollic acid synthesis device is as follows: adding the prepared sodium hydrosulfide and chloroacetic acid solution into a first reaction kettle 1, setting the reaction pressure in the first reaction kettle 1 to be 4-4.5Mpa, reducing the temperature through a temperature control assembly 13, controlling the reaction temperature to be 40-55 ℃, and starting a stirring assembly to react for 30 minutes; excessive hydrogen sulfide generated by the reaction enters an alkali absorption tower 2 through a first gas pipeline 4, liquid alkali for absorption can adopt a sodium hydroxide solution with the content of 32%, and sodium hydrosulfide generated in the absorption procedure can be prepared into a solution with certain solubility and then added into a first reaction kettle 1 for reuse; transferring the mixed solution generated in the first reaction kettle 1 into a second reaction kettle 3, adding a certain amount of 30-32% concentrated hydrochloric acid solution from a hydrochloric acid inlet, uniformly stirring and mixing, carrying out acidification reaction for 1 hour, connecting a second gas outlet 312 to an alkali absorption tower 2, and preparing the sodium hydrosulfide generated in the absorption process into a solution with a certain solubility and adding the solution into the first reaction kettle 1 for reuse.
The synthesis device of thioglycollic acid disclosed by the utility model can be used for compressing hydrogen sulfide gas generated in the reaction process to be in a liquid state to participate in the reaction by controlling the reaction temperature and the reaction pressure, so that the reaction yield can be increased to 89%, and meanwhile, the use amounts of sodium hydrosulfide and liquid alkali are greatly reduced.
The pressure control assembly 12 has various structures, which are not limited herein, in this embodiment, the pressure control assembly 12 may include a pressure sensor 121 and a controller 122, the first valve body 41 is an electromagnetic pressure regulating valve, the pressure sensor 121 is disposed in the first tank 11, the controller 122 is electrically connected to the pressure sensor 121 and the first valve body 41, the pressure sensor 121 detects the pressure in the first tank 11 and transmits pressure data to the controller 122, and the controller 122 may perform a judgment according to the tested pressure data and preset data to control the opening and closing of the first valve body 41.
The mode of the temperature in the first jar of body 11 of control has the multiple, the structure of accuse temperature subassembly 13 also has the multiple, in this embodiment, first jar of body 11 can be the intermediate layer jar, the outer wall of first jar of body 11 is equipped with water inlet 112 and delivery port 113 rather than the intermediate layer and be linked together, the cold water source is linked together with water inlet 112, accuse temperature subassembly 13 includes flow valve 131 and temperature sensor 132, flow valve 131 sets up at water inlet 112, temperature sensor 132 sets up in first jar of body 11, temperature sensor 132 detects the temperature in first jar of body 11, can come the size of control flow valve 131 according to the actual temperature that detects, control the flow in cold water source promptly.
The flow valve 131 can be a solenoid valve and the controller 122 can be electrically connected to the flow valve 131 and the temperature sensor 132. The controller 122 may determine according to the tested temperature data and preset data to control the opening degree of the flow valve 131.
Wherein, the controller 122 may include a temperature control structure electrically connected with the flow valve 131 and the temperature sensor 132, respectively, and a pressure control structure electrically connected with the pressure sensor 121 and the first valve body 41, respectively.
For example: the pressure control structure may include a receiving unit connected to the pressure sensor 121 and the comparing unit, respectively, a comparing unit connected to the comparing unit and the first valve body 41, respectively, and an executing unit connected to the comparing unit and the first valve body 41, respectively. The receiving unit receives the pressure value in the vacuum box detected by the pressure sensor 121 and transmits the pressure value to the comparing unit; the comparison unit compares the detected pressure value with a preset value and transmits the comparison result to the execution unit; if the detected pressure value is greater than the preset value, the execution unit opens the first valve body 41. The temperature control structure may be constructed similarly to the pressure control structure, and may take other structural forms.
The pressure sensor 121 and the temperature sensor 132 are commercially available products, such as: may be an sp-831/3351 pressure sensor 121, a WZPK-336 temperature sensor 132.
The first stirring assembly 14 has various structures, which are not limited herein, in this embodiment, the first stirring assembly 14 may include a first motor 141 and a first stirring paddle 142, one end of the first stirring paddle 142 is located in the first tank 11, and the other end of the first stirring paddle 142 extends out of the first tank 11 to be in transmission connection with the first motor 141, and the first motor 141 is disposed at the top of the first tank 11.
The second stirring assembly 32 has various structures, which are not limited herein, in this embodiment, the second stirring assembly 32 may include a second motor 321 and a second stirring paddle 322, one end of the second stirring paddle 322 is located in the second tank 31, and the other end of the second stirring paddle extends out of the second tank 31 to be in transmission connection with the second motor 321, and the second motor 321 is disposed at the top of the second tank 31.
The inner side wall of the second can 31 may be provided with an acid corrosion resistant layer.
The above is not relevant and is applicable to the prior art.
While certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing is illustrative only and is not limiting of the scope of the utility model, as various modifications or additions may be made to the specific embodiments described and substituted in a similar manner by those skilled in the art without departing from the scope of the utility model as defined in the appending claims. It should be understood by those skilled in the art that any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention are included in the scope of the present invention.
Claims (7)
1. A synthetic device of thioglycollic acid is characterized in that: comprises a first reaction kettle (1), an alkali absorption tower (2) and a second reaction kettle (3); the first reaction kettle (1) comprises a first tank body (11), a pressure control assembly (12), a temperature control assembly (13) and a first stirring assembly (14), wherein the pressure control assembly (12) is used for adjusting the internal pressure of the first tank body (11), the temperature control assembly (13) is used for adjusting the temperature control assembly (13) of the internal temperature of the first tank body (11), the first stirring assembly (14) is used for stirring and mixing materials in the first tank body (11), a first gas outlet (111) is formed in the first tank body (11), the first gas outlet (111) is communicated with the alkali absorption tower (2) through a first gas pipeline (4), and a first valve body (41) is arranged on the first gas pipeline (4); the second reaction kettle (3) comprises a second tank body (31) and a second stirring assembly (32), the second stirring assembly (32) is used for stirring and mixing materials in the second tank body (31), the first tank body (11) is communicated with the second tank body (31) through a liquid pipeline (5), a second valve body (51) is arranged on the liquid pipeline (5), the second tank body (31) is provided with a hydrochloric acid adding port (311) and a second gas outlet (312) which are communicated with the interior of the second tank body, the second gas outlet (312) is communicated with the alkali absorption tower (2) through a second gas pipeline (6), and a third valve body (61) is arranged on the second gas pipeline (6).
2. The apparatus for synthesizing thioglycolic acid according to claim 1, wherein: the pressure control assembly (12) comprises a pressure sensor (121) and a controller (122), the first valve body (41) is an electromagnetic pressure regulating valve, the pressure sensor (121) is arranged in the first tank body (11), and the controller (122) is electrically connected with the pressure sensor (121) and the first valve body (41).
3. The apparatus for synthesizing thioglycolic acid according to claim 2, wherein: the first jar of body (11) is the intermediate layer jar, the outer wall of the first jar of body (11) is equipped with water inlet (112) and delivery port (113) that are linked together rather than the intermediate layer, the cold water source with water inlet (112) are linked together, accuse temperature subassembly (13) include flow valve (131) and temperature sensor (132), flow valve (131) set up water inlet (112), temperature sensor (132) set up in the first jar of body (11).
4. A thioglycolic acid synthesis apparatus according to claim 3, wherein: the flow valve (131) is an electromagnetic valve, and the controller (122) is electrically connected with the flow valve (131) and the temperature sensor (132).
5. The apparatus for synthesizing thioglycolic acid according to any of claims 1 to 4, wherein: the first stirring assembly (14) comprises a first motor (141) and a first stirring paddle (142), one end of the first stirring paddle (142) is located in the first tank body (11), the other end of the first stirring paddle extends out of the first tank body (11) and is in transmission connection with the first motor (141), and the first motor (141) is arranged at the top of the first tank body (11).
6. The apparatus for synthesizing thioglycolic acid according to any of claims 1 to 4, wherein: the second stirring assembly (32) comprises a second motor (321) and a second stirring paddle (322), one end of the second stirring paddle (322) is located in the second tank body (31), the other end of the second stirring paddle extends out of the second tank body (31) and is in transmission connection with the second motor (321), and the second motor (321) is arranged at the top of the second tank body (31).
7. The apparatus for synthesizing thioglycolic acid according to any of claims 1 to 4, wherein: and an acid corrosion prevention layer is arranged on the inner side wall of the second tank body (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121368002.8U CN215540842U (en) | 2021-06-18 | 2021-06-18 | Synthesis device of thioglycollic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121368002.8U CN215540842U (en) | 2021-06-18 | 2021-06-18 | Synthesis device of thioglycollic acid |
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| Publication Number | Publication Date |
|---|---|
| CN215540842U true CN215540842U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121368002.8U Active CN215540842U (en) | 2021-06-18 | 2021-06-18 | Synthesis device of thioglycollic acid |
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| CN (1) | CN215540842U (en) |
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2021
- 2021-06-18 CN CN202121368002.8U patent/CN215540842U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A synthesis device of Thioglycolic acid Effective date of registration: 20230703 Granted publication date: 20220118 Pledgee: China Construction Bank Suizhou Chengzhong Sub branch Pledgor: HUBEI BENXING NEW MATERIAL Co. Registration number: Y2023980046921 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230807 Granted publication date: 20220118 Pledgee: China Construction Bank Suizhou Chengzhong Sub branch Pledgor: HUBEI BENXING NEW MATERIAL Co. Registration number: Y2023980046921 |