CN214300388U - Production system for preparing adiponitrile by acrylonitrile electrolytic dimerization - Google Patents
Production system for preparing adiponitrile by acrylonitrile electrolytic dimerization Download PDFInfo
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- CN214300388U CN214300388U CN202022600700.8U CN202022600700U CN214300388U CN 214300388 U CN214300388 U CN 214300388U CN 202022600700 U CN202022600700 U CN 202022600700U CN 214300388 U CN214300388 U CN 214300388U
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Abstract
The invention belongs to the field of electrolytic chemistry, and particularly relates to a production system for preparing adiponitrile by electrolytic dimerization of acrylonitrile. The system comprises an electrolytic cell, a temperature regulator, a three-phase separator, an oil cooler, a mixer, a circulating pump, an electrolyte replenishing tank, an electrolyte replenishing pump, an acrylonitrile replenishing tank, an acrylonitrile replenishing pump and the like. The acrylonitrile electrolysis reaction in the production system is carried out in a novel efficient electrolytic tank, so that the current efficiency is improved, the reduction of the current efficiency and the generation of byproducts caused by uneven distance between polar plates and uneven distribution of inlet liquid are reduced, and the yield of adiponitrile is improved; the three-phase separator and the oil cooler are used, so that the content of acrylonitrile gas in the transportation of tail gas and crude oil is reduced, the explosive risk is reduced, and the safe operability of the device is improved; the variable frequency magnetic pump is adopted to adjust the flow, and an adjusting valve group is not used, so that the investment is reduced, zero leakage is realized, and the safety and environmental protection level is improved.
Description
Technical Field
The utility model belongs to the field of electrolytic chemistry, specifically a production system for preparing adiponitrile by acrylonitrile electrolytic dimerization.
Background
China is a large population country, and with the improvement of the living standard of the public and the development of industry, the demand of nylon 66 fiber and engineering plastic is increasing continuously. Adiponitrile as one of raw materials for synthesizing nylon 66, the synthesis technology of adiponitrile has been monopolized by foreign companies such as Invida, Pasteur, Asahi formation, Hainuo and the like for a long time, and most of adiponitrile for producing nylon 66 in China currently depends on import.
Common adiponitrile synthesis processes include adipic acid ammoniation dehydration, caprolactam, butadiene, and electrolytic acrylonitrile processes. The adipic acid ammonification dehydration method and the caprolactam method have been increasingly marginalized because of low productivity and inferior product quality and yield to the butadiene method and the electrolytic acrylonitrile method. The synthesis methods currently used industrially are mainly the butadiene method and the electrolytic acrylonitrile method. Butadiene method uses butadiene and hydrocyanic acid as raw materials, synthesize adiponitrile through 2-step method under the catalyst of phosphine complex, the raw materials are cheap and apt, the route is short, the reaction condition is mild and energy consumption is lower, product yield and quality are all higher, it is a more advanced adiponitrile production technology. However, the process adopts the highly toxic hydrogen cyanide as a raw material, and once leakage occurs, the process causes great harm, so that the process has very high requirements on equipment, operation and management in the production process.
The method for electrolyzing acrylonitrile is to prepare adiponitrile by performing dimerization reaction on acrylonitrile in an electrolytic cell, realizes industrial production from Monsanto in the 60 th century, and gradually develops from a diaphragm type electrolytic method to a diaphragm-free electrolytic method. At present, there are also companies which use electrolytic acrylonitrile method abroad to produce adiponitrile in an industrial manner, such as Asahi Kasei Corp, Senao U.S. and Pasteur Germany. The production line has the advantages of small investment of a single set of equipment, easy adjustment of production scale, single variety and wide source of raw materials, and convenient production management. In recent years, the acrylonitrile electrolysis method is deeply researched, and a certain breakthrough is made in the production process and method, but the efficiency and the safety of a production system are still required to be further improved.
Disclosure of Invention
The utility model aims to provide a novel efficient production system for preparing adiponitrile by electrolyzing and dimerizing acrylonitrile, aiming at the problems of efficiency and safety in the existing system for electrolyzing acrylonitrile. The acrylonitrile electrolysis reaction takes place in novel efficient electrolysis trough among this production system, has improved current efficiency, has reduced the decline of current efficiency and the production of accessory substance that arouses because of the distance between the polar plate is uneven and import liquid distributes unevenly, has improved adiponitrile yield, makes its production system efficient, and the security is good, also environmental protection more.
In order to realize the purpose of the invention, the technical scheme of the utility model is as follows:
a production system for preparing adiponitrile by electrolytic dimerization of acrylonitrile comprises an electrolytic bath, a three-phase separator and an oil cooler, wherein an outlet of the electrolytic bath is communicated with the three-phase separator through a pipeline with a temperature regulator; the highest point of the three-phase separator is connected with the oil cooler through a horizontal pipeline.
As a better embodiment of the application, the electrolytic cell is a high-efficiency electrolytic cell, and the shell of the electrolytic cell is made of non-polar plastics or a composite material of metal and non-polar plastics. The electrode plate component and the electrolytic tank shell in the electrolytic tank are accurately positioned by adopting a positioning mechanism, and a distributor is arranged at the liquid inlet of the electrolytic tank. The reduction of current efficiency and the generation of byproducts caused by uneven distance between the polar plates and uneven distribution of inlet liquid are reduced, and the current efficiency and the yield of adiponitrile are improved.
As a better embodiment of the application, the distribution plate of the distributor is arranged at the electrolyte inlet side of the electrolytic cell, small holes with the diameter of 2-5 mm are arranged on the distribution plate, and the aperture ratio of the distribution plate is 20-50%.
As a better implementation mode of the oil cooler, an upward-bent crude oil outlet is formed in the upper portion of the oil cooler, the highest point of a crude oil pipeline is lower than 0.2-5 times of the diameter of the oil cooler, and a tail gas outlet is formed in the top of the oil cooler. A cooling assembly is arranged in the oil cooler; the oil cooler is made of high-strength quartz glass. The volatilization speed of acrylonitrile can be reduced by cooling the oil phase, the content of acrylonitrile in gas phase components is reduced, the utilization efficiency of acrylonitrile is improved, and the possibility of explosion is reduced.
As a better embodiment of the application, the main body of the three-phase separator is of a cylindrical structure, and the top of the three-phase separator is of a conical structure; the main components of the device comprise a vertical partition plate, a three-phase liquid inlet and an electrolyte outlet, wherein the vertical partition plate is arranged in the device and is not in contact with the top; the three-phase liquid inlet and the electrolyte outlet are respectively arranged at two sides of the vertical partition plate. The conical highest point of the three-phase separator is connected with the oil cooler through a horizontal pipeline, so that the disturbance of a gas phase to an oil phase layer in the oil cooler in the escaping process is reduced, the collection of a crude oil phase is facilitated, and the volatilization of acrylonitrile is reduced.
As a better implementation mode of the application, the production system for preparing adiponitrile by acrylonitrile electrolytic dimerization specifically comprises an electrolyte supplementing pump, an electrolytic bath, a temperature regulator, a three-phase separator, an oil cooler, a mixer, a circulating pump, a crude oil storage tank, an electrolyte supplementing tank, an acrylonitrile supplementing tank and an acrylonitrile supplementing pump. The medium flowing direction is taken as the sequence, the electrolytic cell is connected with a temperature regulator, the temperature regulator is connected with a three-phase separator through a pipeline, and a temperature detection element T is arranged on the pipeline; an oil cooler is arranged at the upper part of the three-phase separator, an oil outlet of the oil cooler is arranged at the upper part of the oil cooler, and the oil outlet is connected with a crude oil storage tank; the three-phase separator is connected with the mixer, the mixer is provided with an acrylonitrile charging port and an electrolyte charging port, the mixer is connected with the circulating pump, the circulating pump is connected with the electrolytic cell, and the connecting pipeline is provided with a flowmeter and a pressure detection element; the electrolyte replenishing tank is connected with an electrolyte replenishing pump, the outlet of the electrolyte replenishing pump is connected with the electrolyte charging port of the mixer through a pipeline, and the pipeline is provided with a flowmeter; the acrylonitrile replenishing tank is connected with an acrylonitrile replenishing pump, the acrylonitrile replenishing pump is connected with an acrylonitrile charging port of the mixer through a pipeline, and a flowmeter is arranged on the pipeline.
As a better implementation mode of the application, the electrolyte supplementing pump, the acrylonitrile supplementing pump and the circulating pump all adopt a magnetic pump variable frequency pump. The electrolyte supplementing pump and the acrylonitrile supplementing pump adopt the magnetic pump variable frequency pump to improve the supplementing precision and the adjusting speed of the electrolyte and the acrylonitrile, and are favorable for maintaining the stability of an electrolysis system. The circulating pump adopts a magnetic pump variable frequency pump, so that the leakage possibility is reduced, the safety and environmental protection level is improved, the flow speed stability of the circulating liquid of the system is improved, the stay time of the electrolyte between the polar plates in the electrolytic process is kept stable, the occurrence of side reactions is reduced, and the product yield is improved. And because no regulating valve group is adopted, the system investment is reduced.
Electrolyte benefit pump, acrylonitrile benefit pump, circulating pump's casing all adopt the PP material, prevent that the pump body from taking place the loss that electric leakage leads to electrolytic current to ground from the pump body after with the contact of electrolyte, reduce current efficiency.
As a better implementation mode of the application, the electrolyte flowmeter, the acrylonitrile flowmeter and the mixed liquid flowmeter are turbine electromagnetic induction type flowmeters, and the parts of the flowmeters, which are in contact with materials, are made of PP plastics; the parts, in contact with the materials, of the pressure detection element P and the temperature detection element T are in a PP wrapping type, so that the charged electrolyte is prevented from being connected with a lead through detection equipment to cause electric leakage, and the current efficiency is reduced.
As a better implementation mode of the application, pipelines, equipment and valves which are in contact with materials in the whole production system are made of PP materials; prevent the electrolyte from causing the reduction of current efficiency to the electricity leakage through the pipeline, the equipment and the valve. In addition, the PP material is strong in corrosion resistance and free of metal ions, and metal ions generated after metal pipelines, equipment and valves are corroded by electrolyte are prevented from being deposited on the electrode plate, so that the inter-electrode voltage is unstable, more byproducts are generated, and the current efficiency is reduced.
The oil cooler temperature regulator and the heat transfer component are made of high-strength quartz glass, and the system is safer to use.
Compared with the prior art, the utility model discloses an actively the effect is embodied at:
the acrylonitrile electrolysis reaction in the production system is carried out in a novel efficient electrolytic tank, the current efficiency is improved, the reduction of the current efficiency and the generation of byproducts caused by uneven distance between polar plates and uneven distribution of inlet liquid are reduced, and the yield of adiponitrile is improved.
And (II) the three-phase separator and the oil cooler are used, so that the content of acrylonitrile gas in the tail gas and crude oil conveying process is reduced, the explosive risk is reduced, and the safe operability of the device is improved.
And thirdly, the contact part of the whole system and the electrolyte adopts non-metallic materials, so that the loss of electrolytic current is reduced, and the current efficiency is improved.
And (IV) the flow is adjusted by adopting the variable-frequency magnetic pump, and an adjusting valve group is not used, so that the investment is reduced, zero leakage is realized, and the safety and environmental protection level is improved.
Drawings
FIG. 1 is a schematic structural diagram of a system for producing adiponitrile by electrolytic dimerization of acrylonitrile.
Wherein, 1-electrolyte supplement pump, 2-acrylonitrile supplement pump, 3-circulating pump, 4-electrolyte supplement tank, 5-electrolyte flowmeter, 6-acrylonitrile supplement tank, 7-acrylonitrile flowmeter, 8-mixed liquid flowmeter, 9-mixer, 10-electrolytic tank, 11-temperature regulator, 12-crude oil storage tank, 13-three-phase separator, 14-oil cooler.
FIG. 2 is a schematic view of the structure of the electrolytic cell of the present invention.
Wherein, 1-small hole, 2-distributing plate, 3-electrolytic tank.
Detailed Description
A production system for preparing adiponitrile by electrolytic dimerization of acrylonitrile comprises an electrolytic bath, a three-phase separator and an oil cooler, wherein an outlet of the electrolytic bath is communicated with the three-phase separator through a pipeline with a temperature regulator; the highest point of the three-phase separator is connected with the oil cooler through a horizontal pipeline.
The electrolytic tank is a high-efficiency electrolytic tank, and the shell of the electrolytic tank is made of non-polar plastics or a composite material of metal and non-polar plastics. The electrode plate component and the electrolytic tank shell in the electrolytic tank are accurately positioned by adopting a positioning mechanism, and a distributor is arranged at the liquid inlet of the electrolytic tank.
The distribution plate of the distributor is arranged on the inlet side of the electrolyte of the electrolytic cell, small holes with the diameter of 2-5 mm are formed in the distribution plate, and the aperture ratio of the distribution plate is 20-50%.
An upward-bent crude oil outlet is formed in the upper portion of the oil cooler, the highest point of a crude oil pipeline is lower than 0.2-5 times of the diameter of the oil cooler, and a tail gas outlet is formed in the top of the oil cooler. A cooling assembly is arranged in the oil cooler; the oil cooler is made of high-strength quartz glass.
The main body of the three-phase separator is of a cylindrical structure, and the top of the three-phase separator is of a conical structure; the main components of the device comprise a vertical partition plate, a three-phase liquid inlet and an electrolyte outlet, wherein the vertical partition plate is arranged in the device and is not in contact with the top; the three-phase liquid inlet and the electrolyte outlet are respectively arranged at two sides of the vertical partition plate. The conical highest point of the three-phase separator is connected with the oil cooler through a horizontal pipeline.
The utility model provides a production system of acrylonitrile electrolytic dimerization system adiponitrile, its includes specifically that electrolyte supplyes pump, electrolysis trough, temperature regulator, three-phase separator, oil cooler, blender, circulating pump, crude oil storage tank, electrolyte supplyes jar, acrylonitrile supplyes the pump. The medium flowing direction is taken as the sequence, the electrolytic cell is connected with a temperature regulator, the temperature regulator is connected with a three-phase separator through a pipeline, and a temperature detection element T is arranged on the pipeline; an oil cooler is arranged at the upper part of the three-phase separator, an oil outlet of the oil cooler is arranged at the upper part of the oil cooler, and the oil outlet is connected with a crude oil storage tank; the three-phase separator is connected with the mixer, the mixer is provided with an acrylonitrile charging port and an electrolyte charging port, the mixer is connected with the circulating pump, the circulating pump is connected with the electrolytic cell, and the connecting pipeline is provided with a flowmeter and a pressure detection element; the electrolyte replenishing tank is connected with an electrolyte replenishing pump, the outlet of the electrolyte replenishing pump is connected with the electrolyte charging port of the mixer through a pipeline, and the pipeline is provided with a flowmeter; the acrylonitrile replenishing tank is connected with an acrylonitrile replenishing pump, the acrylonitrile replenishing pump is connected with an acrylonitrile charging port of the mixer through a pipeline, and a flowmeter is arranged on the pipeline.
And the electrolyte supplementing pump, the acrylonitrile supplementing pump and the circulating pump are all magnetic pump variable frequency pumps.
And the shells of the electrolyte supplementing pump, the acrylonitrile supplementing pump and the circulating pump are all made of PP materials.
The electrolyte flowmeter, the acrylonitrile flowmeter and the mixed liquid flowmeter are turbine electromagnetic induction type flowmeters, and the parts of the flowmeters, which are in contact with the materials, are made of PP plastics; the parts of the pressure detection element P and the temperature detection element T, which are in contact with the material, adopt a PP wrapping type.
In the whole production system, pipelines, equipment and valves in contact with materials are made of PP materials.
The oil cooler temperature regulator and the heat transfer assembly are made of high-strength quartz glass, and the system is safer to use.
In order to facilitate understanding of the inventive content, the invention will be further elucidated with reference to the drawings and the detailed description. It should not be understood that the scope of the above-described subject matter of the present invention is limited to the following examples.
Example 1:
the electrolytic cell 10 was assembled using stainless steel as the anode and lead as the cathode as the electrode plates, and a distributor as shown in fig. 2 was provided at the inlet of the electrolytic cell to allow the electrolyte to uniformly enter between the electrode plates. The distance between each polar plate of the electrolytic cell is accurately positioned by installing positioning pins at four corners of the cathode plate and the anode plate, and the error of the distance between the polar plates is ensured to be less than or equal to 0.5 mm. The electrolytic tank is of a composite structure, and except the electrode plate, other parts contacting with the electrolyte are made of non-metal materials.
Preparing electrolyte from 8% of monopotassium phosphate, 0.5% of tetrabutylammonium hydroxide, 0.5% of ethylene diamine tetraacetic acid, 2% of borax and the balance of water in an electrolyte preparation tank, adjusting the pH value of the electrolyte to 7.8 by using phosphoric acid and potassium hydroxide, and pumping the prepared electrolyte to an electrolyte replenishing tank 4 and a three-phase separator 13. And starting the circulating pump 3 to circulate the electrolyte in the system, wherein the circulating flow is 20m3/h, and the circulating flow is measured and controlled by a flowmeter. And gradually adding the acrylonitrile in the acrylonitrile supplementing tank 4 into the circulating electrolyte through the acrylonitrile supplementing pump 2 until the mass percent of the acrylonitrile in the circulating electrolyte reaches 5%. In this process, the components of the circulating electrolyte are thoroughly mixed and preheated to 42 ℃ by the mixer 9 and the temperature regulator 11.
And (3) starting a direct current power supply, carrying out electrolytic synthesis by using the current density of 1800 plus 2000A/square meter, and metering and adding the electrolyte and the acrylonitrile by the electrolyte adding pump 1 and the acrylonitrile adding pump 2 through a flowmeter according to the liquid level of the oil cooler 14 and the change of the acrylonitrile content in the electrolyte. The electrolyzed electrolyte mixed solution containing adiponitrile and oxygen enters an oil, water and gas three-phase separator 13 after passing through a temperature regulator 11, the three-phase separator 13 separates the electrolyte from water phase to the bottom and flows out, and the oil and the gas flow out from the top and enter an oil cooler 14 after passing through a horizontal pipe with the length of 2 meters. In the oil cooler 14, the oil and gas are further separated, the oil flowing out from the upper part of the cooler and the gas flowing out from the top. Sampling analysis is carried out on the tail gas outlet of the oil cooler, and the temperature of the oil cooler 14 is adjusted to ensure that the content of acrylonitrile tail gas is lower than 100 ppm. The separated oil enters a crude oil storage tank 12 through an upward-bent oil outlet pipe, the electrolyte water phase enters a mixer 9, and the steps are repeated in a circulating mode. After 48 hours of continuous reaction, the crude adiponitrile concentration in the crude oil storage tank 12 is 60%. And rectifying the collected oil phase to obtain the product adiponitrile.
The pipelines, valves, the three-phase separator 13, the temperature detector T, the pressure detector P, the electrolyte flowmeter 5, the acrylonitrile flowmeter 7, the mixed liquid flowmeter 8 and the liquid contact part of the whole system are all made of PP materials. The oil cooler 14 and the temperature regulator 11 are made of high-strength quartz glass. The electrolyte supplementing pump 1, the acrylonitrile supplementing pump 2 and the circulating pump 3 all adopt a variable frequency magnetic pump to automatically adjust the flow of liquid.
Although the present invention has been described in detail with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.
Claims (10)
1. A production system for preparing adiponitrile by electrolytic dimerization of acrylonitrile comprises an electrolytic bath (10), a three-phase separator (13) and an oil cooler (14), and is characterized in that: the outlet of the electrolytic cell (10) is communicated with a three-phase separator (13) through a pipeline with a temperature regulator; the highest point of the three-phase separator (13) is connected with the oil cooler (14) through a horizontal pipeline.
2. The system for producing adiponitrile by electrolytic dimerization of acrylonitrile as claimed in claim 1, wherein: an upward-bent crude oil outlet is formed in the upper portion of the oil cooler (14), the highest point of a crude oil pipeline is lower than 0.2-5 times of the diameter of the oil cooler (14), and a tail gas outlet is formed in the top of the oil cooler (14).
3. The system for producing adiponitrile by electrolytic dimerization of acrylonitrile as claimed in claim 1, wherein: the electrode plate component and the electrolytic tank shell in the electrolytic tank (10) are accurately positioned by adopting a positioning mechanism, and a distributor is arranged at a liquid inlet of the electrolytic tank (10).
4. The system for producing adiponitrile by electrolytic dimerization of acrylonitrile as claimed in claim 1, wherein: the main body of the three-phase separator (13) is of a cylindrical structure, and the top of the three-phase separator is of a conical structure; the main components of the device comprise a vertical partition plate, a three-phase liquid inlet and an electrolyte outlet, wherein the vertical partition plate is arranged in the device and is not in contact with the top; the three-phase liquid inlet and the electrolyte outlet are respectively arranged at two sides of the vertical partition plate.
5. The system for producing adiponitrile by electrolytic dimerization of acrylonitrile as claimed in claim 1, wherein: a cooling assembly is arranged in the oil cooler (14); the oil cooler (14) is made of high-strength quartz glass.
6. The utility model provides a production system of acrylonitrile electrolytic dimerization system adiponitrile, includes that electrolyte supplyes pump (1), electrolysis trough (10), thermoregulator (11), three-phase separator (13), oil cooler (14), blender (9), circulating pump (3), crude oil storage tank (12), electrolyte supplyes jar (4), acrylonitrile supplyes jar (6), acrylonitrile supplyes pump (2), its characterized in that: the medium flow direction is taken as a sequence, the electrolytic cell (10) is connected with a temperature regulator (11), the temperature regulator (11) is connected with a three-phase separator (13) through a pipeline, and a temperature detection element (T) is arranged on the pipeline; an oil cooler (14) is arranged at the upper part of the three-phase separator (13), an oil outlet of the oil cooler (14) is arranged at the upper part of the oil cooler (14), and the oil outlet is connected with a crude oil storage tank (12); the three-phase separator (13) is connected with the mixer (9), the mixer (9) is provided with an acrylonitrile feed inlet and an electrolyte feed inlet, the mixer (9) is connected with the circulating pump (3), the circulating pump (3) is connected with the electrolytic bath (10), and a mixed liquid flowmeter (8) and a pressure detection element (P) are arranged on a connecting pipeline; the electrolyte supplementing tank (4) is connected with the electrolyte supplementing pump (1), the outlet of the electrolyte supplementing pump (1) is connected with the electrolyte feeding port of the mixer (9) through a pipeline, and an electrolyte flowmeter (5) is arranged on the pipeline; the acrylonitrile supplementing tank (6) is connected with the acrylonitrile supplementing pump (2), the acrylonitrile supplementing pump (2) is connected with an acrylonitrile feeding port of the mixer (9) through a pipeline, and an acrylonitrile flowmeter (7) is arranged on the pipeline.
7. The system for producing adiponitrile by electrolytic dimerization of acrylonitrile as claimed in claim 6, wherein: the electrolytic tank (10) adopts a high-efficiency electrolytic tank, and the shell of the electrolytic tank (10) adopts non-polar plastic or composite material of metal and non-polar plastic.
8. The system for producing adiponitrile by electrolytic dimerization of acrylonitrile as claimed in claim 6, wherein: the electrolyte supplementing pump (1), the acrylonitrile supplementing pump (2) and the circulating pump (3) adopt a magnetic pump variable frequency pump, and the shell adopts a PP material.
9. The system for producing adiponitrile by electrolytic dimerization of acrylonitrile as claimed in claim 6, wherein: the electrolyte flowmeter (5), the acrylonitrile flowmeter (7) and the mixed liquid flowmeter (8) are turbine electromagnetic induction type flowmeters, and the parts of the flowmeters, which are in contact with the materials, are made of PP plastics; the parts of the pressure detection element (P) and the temperature detection element (T) which are in contact with the materials are wrapped by PP.
10. The system for producing adiponitrile by electrolytic dimerization of acrylonitrile as claimed in claim 6, wherein: in the whole production system, pipelines, equipment and valves which are in contact with materials are made of PP materials; the temperature regulator and the heat transfer component of the oil cooler adopt high-strength quartz glass.
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| CN202022600700.8U CN214300388U (en) | 2020-11-11 | 2020-11-11 | Production system for preparing adiponitrile by acrylonitrile electrolytic dimerization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116180114A (en) * | 2023-01-10 | 2023-05-30 | 孙少哲 | Device and method for producing adiponitrile by electrolyzing acrylonitrile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116180114A (en) * | 2023-01-10 | 2023-05-30 | 孙少哲 | Device and method for producing adiponitrile by electrolyzing acrylonitrile |
| CN116180114B (en) * | 2023-01-10 | 2023-11-07 | 上海竣铭化工工程设计有限公司 | Device and method for producing adiponitrile by electrolyzing acrylonitrile |
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