CN111036150B - Thiodicarb alcohol washing continuous production process and device - Google Patents
Thiodicarb alcohol washing continuous production process and device Download PDFInfo
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- CN111036150B CN111036150B CN201911215060.4A CN201911215060A CN111036150B CN 111036150 B CN111036150 B CN 111036150B CN 201911215060 A CN201911215060 A CN 201911215060A CN 111036150 B CN111036150 B CN 111036150B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
- B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
- B01J8/224—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1809—Controlling processes
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1818—Feeding of the fluidising gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1836—Heating and cooling the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1881—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with particles moving downwards while fluidised
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C381/00—Compounds containing carbon and sulfur and having functional groups not covered by groups C07C301/00 - C07C337/00
- C07C381/06—Compounds containing sulfur atoms only bound to two nitrogen atoms
- C07C381/08—Compounds containing sulfur atoms only bound to two nitrogen atoms having at least one of the nitrogen atoms acylated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00743—Feeding or discharging of solids
- B01J2208/00769—Details of feeding or discharging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention relates to a thiodicarb alcohol washing continuous production device, which comprises a material mixing tank, wherein a material inlet to be washed and a washed methanol inlet are arranged at the upper part of the material mixing tank, a mixed slurry outlet is arranged at the bottom of the material mixing tank, the mixed slurry outlet is connected with a material inlet at the upper part of an alcohol washing tower through a feed pump, the alcohol washing tower further comprises a washed methanol outlet and a nitrogen outlet which are arranged at the upper part, a methanol inlet, a product outlet and a nitrogen inlet which are arranged at the lower part, an inner sleeve and a gas distributor are arranged in the alcohol washing tower, the methanol inlet is connected with the bottom outlet of a methanol tank through a heat exchanger, the upper part of the methanol tank is provided with a methanol inlet and a washed thiodicarb inlet, the product outlet is connected with the upper inlet of a centrifuge, the centrifuge is further provided with a washed thiodicarb outlet and a mother liquor methanol outlet, the mother liquor outlet is connected with the thiodicarb inlet, and a fresh nitrogen inlet and a mixed nitrogen outlet are further arranged on a nitrogen storage tank; the invention has the advantages of high production capacity, environmental friendliness and high product quality.
Description
Technical Field
The invention relates to the technical field of pesticide compound synthesis, in particular to a thiodicarb alcohol washing continuous production process and device.
Background
Thiodicarb is a second-generation carbamate insecticide, is a low-toxicity derivative of methomyl, is formed by connecting two methomyl molecules through a thioether chain, has toxicity of only about one tenth of that of methomyl, is a high-efficiency, broad-spectrum, low-toxicity and systemic stomach-toxicity insecticide, almost has no contact-killing effect on pests, has no fumigation and systemic effect, has stronger selectivity, has a very short residual period in soil, has an action mechanism of nerve blocking effect, namely, inhibits reactivation of conducting substances in nerve fibers by inhibiting the activity of the choline acetate, leads to poisoning death of pests, can kill eggs, can kill larvae and certain imago, is mainly used for non-direct eating crops (cotton), is particularly effective for early seed treatment of pests such as cabbage, peanut and corn in horticultural crops, has no contact-killing effect on larvae of pests such as lepidoptera, homoptera, hymenoptera, diptera, coleoptera and the like, and is an excellent variety for preventing and controlling cotton bollworms in China at present.
Thiodicarb is generally synthesized using the following route:
(1) Salinization reaction:
(2) And (3) synthesis reaction:
the synthesized product contains a large amount of impurities such as solvent xylene, excessive unreacted pyridine and methomyl, and the reaction products thiodicarb and pyridine hydrochloride, and the solubility of pyridine hydrochloride and methomyl in methanol is higher than that of the product obtained by water washing, so that the purity of the methanol washing is higher than that of the product obtained by water washing. Along with the stricter national requirements on pesticide toxicity, the requirements on the methomyl residue index with higher toxicity are lower. Alcohol washing is also required after water washing to obtain a thiodicarb product of high purity and low residue.
The prior domestic thiodicarb alcohol washing production process adopts an intermittent operation process: the solid material from the water washing section is taken as the material to be washed to enter an alcohol washing kettle, methanol is added, the solid thiodicarb product and alcohol washing mother liquor are separated by a centrifuge after heating, stirring and cooling, wherein the solid thiodicarb product enters a subsequent drying section, and the alcohol washing mother liquor enters a subsequent recovery device. The intermittent process needs to intermittently open a manhole of the alcohol washing kettle to pour materials, and organic materials such as methanol, dimethylbenzene and the like volatilize into the air, so that the smell is harmful to the physical and psychological health and the environment of operators. The main equipment for alcohol washing is a stirred tank, a large amount of methanol is required to ensure that materials have fluidity in the stirred tank, the consumption of the methanol is large, the time is long, along with the stricter requirements of the nation on environmental protection, the improvement of the fine chemical production process level is increasingly important, the equipment investment can be effectively reduced, the production capacity of the equipment is increased, the production environment is improved, the yield and the product quality of the product are improved, the production cost and the emission of pollutants are reduced, and the method is an effective way for enhancing the competitiveness of the fine chemical industry and ensuring the sustainable and healthy development of the fine chemical industry; therefore, it is very necessary to provide a thiodicarb alcohol washing continuous production process and device with high production capacity, environmental friendliness and high product quality.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a thiodicarb alcohol washing continuous production process and device with high production capacity, environment friendliness and high product quality.
The purpose of the invention is realized in the following way: the utility model provides a thiodicarb alcohol washing serialization apparatus for producing, it includes the batching jar, batching jar upper portion is provided with material import and the methyl alcohol import after washing of waiting to wash, and batching jar bottom is provided with mixed thick liquid export, and mixed thick liquid export is connected with the material feed inlet on alcohol washing tower upper portion through the charge pump, alcohol washing tower still includes methyl alcohol export and the nitrogen gas export of setting up on upper portion after washing, sets up methyl alcohol feed inlet, product export and the nitrogen gas import in the lower part, and the inside inner skleeve and the gas distributor of being provided with of alcohol washing tower, and the methyl alcohol feed inlet is connected with the bottom export of methyl alcohol jar through the heat exchanger, methyl alcohol jar upper portion is provided with methyl alcohol feed inlet and after washing thiodicarb import, and the product export is connected with the upper portion of centrifuge, mother liquor methyl alcohol export and after washing thiodicarb import are connected, nitrogen gas export and nitrogen gas storage tank upper portion is connected, still be provided with fresh nitrogen gas import and mixed nitrogen gas export on the nitrogen gas storage tank, mixed nitrogen gas export and alcohol washing tower's nitrogen gas import is connected.
A feed pump and a valve are arranged between the mixed slurry outlet and the material feed inlet.
A methanol discharging pump is arranged between the methanol inlet after washing and the methanol outlet after washing.
A methanol feed pump is arranged between the heat exchanger and the bottom outlet.
A mother liquor methanol feed pump is arranged between the product outlet and the upper inlet.
A nitrogen compressor is arranged between the mixed nitrogen outlet and the nitrogen inlet, and the nitrogen compressor is also connected with a nitrogen storage tank.
The bottom gas distributor of the alcohol scrubber may be any form of gas distributor, preferably an aerator, and the top gas collector may be any form of gas collector, preferably a wire mesh demister gas collector.
The alcohol washing tower is a bubbling tower, a single-stage loop reactor or a multi-stage loop reactor, which are connected in parallel or in series, and the thiodicarb material after water washing is contacted with fresh methanol in the alcohol washing tower in a step-by-step countercurrent manner.
The thiodicarb alcohol washing continuous production process comprises the following steps:
step 1): adding the washed thiodicarb solid serving as a solid to be washed into a material mixing tank, mixing with washed methanol to form slurry, and continuously conveying the slurry into the upper part of an alcohol washing tower through a feed pump;
step 2): fresh methanol enters a methanol tank, is heated to 30-60 ℃ by a methanol feed pump through a heat exchanger and is continuously fed into the lower part of an alcohol washing tower;
step 3): nitrogen enters a nitrogen storage tank and is continuously fed into a nitrogen inlet at the bottom of the alcohol washing tower through a nitrogen compressor;
step 4): the bottom of the alcohol washing tower is provided with a gas distributor, and nitrogen enters the synthesis reactor through the gas distributor;
step 5): the top of the alcohol washing tower is provided with a gas collector, nitrogen is separated at the top of the tower and is collected to return to a nitrogen storage tank, and the nitrogen is circularly returned to the alcohol washing tower through a nitrogen compressor;
step 6): the methanol after washing is separated into two paths through a methanol discharging pump from a methanol outlet after washing: one path of the waste methanol treatment section is removed, and the other path of the waste methanol treatment section enters a material mixing tank to mix the washed thiodicarb solid into slurry;
step 7): mixing the washed thiodicarb solid with fresh methanol which just enters the tower, and entering a centrifuge from a product outlet at the bottom of the alcohol washing tower;
step 8): the centrifuged solid material enters a subsequent drying working section, and the mother liquor methanol returns to a methanol storage tank.
The invention has the beneficial effects that: the invention realizes continuous operation, simple flow, less equipment investment, stable product quality and countercurrent washing of the washed thiodicarb by fresh methanol in the alcohol washing tower; the continuous circulation flow device using nitrogen as power eliminates a stirrer, and reduces the power consumption by 50%; the multistage circulation flow continuous alcohol washing process with stronger stirring effect is adopted, the washed methanol is contacted with fresh materials, and the fresh methanol is contacted with purest materials, so that the driving force and the final washing purity of the whole washing process are improved, and the methanol consumption can be reduced by 30% under the same conditions; the invention has the advantages of high production capacity, environmental friendliness and high product quality.
Drawings
FIG. 1 is a schematic diagram of the apparatus and flow structure of the present invention.
In the figure, 1, a batching tank 2, a nitrogen storage tank 3, a methanol tank 4, an alcohol scrubber 5, a gas collector 6, a gas distributor 7, an inner sleeve 8, a nitrogen compressor 9, a centrifuge 10, a feed pump 11, a methanol discharge pump 12, a methanol feed pump 13, a mother liquor methanol feed pump 14, a heat exchanger 15, a material inlet 16 to be washed, a methanol inlet 17 after washing, a mixed slurry outlet 18, a methanol outlet 19 after washing, a nitrogen outlet 20, a material inlet 21, a product outlet 22, a nitrogen inlet 23, a methanol inlet 24, an upper inlet 25, a mother liquor methanol outlet 26, a thiodicarb outlet 27 after washing, a bottom outlet 28, a methanol inlet 29, a thiodicarb inlet 30 after washing, a top inlet 31, a mixed nitrogen outlet 32, and a fresh nitrogen inlet.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the thiodicarb solid after water washing is added into a batching tank 1, mixed with methanol after washing to form slurry, and continuously sent into the upper part of an alcohol washing tower 4 through a feed pump 10; fresh methanol enters a methanol tank 3, is heated by a methanol feed pump 12 through a heat exchanger 14 and is continuously fed into the lower part of an alcohol washing tower 4; the nitrogen enters a nitrogen storage tank 2, is continuously sent into a gas distributor 6 at the bottom of an alcohol washing tower 4 through a nitrogen compressor 8, and is washed in countercurrent with the washed thiodicarb in the alcohol washing tower 4; the nitrogen makes the density difference between the inner sleeve 7 and the outer sleeve 7 of the alcohol washing tower 4, so that the liquid is pushed to move from a low-gas-content area to a high-gas-content area, and the high-speed flow inside the alcohol washing tower is formed, so that materials are fully mixed, and the washing efficiency is improved; the top of the alcohol washing tower 4 is provided with a gas collector, nitrogen is discharged from the top and enters the nitrogen storage tank 2, after the suspension is separated after the top is settled, the washed methanol is extracted from the washed methanol outlet 18 through the washed methanol discharging pump 11 and is divided into two paths: one path of the waste methanol removing treatment working section is used for removing waste methanol, and the other path of the waste methanol removing treatment working section enters a material mixing tank 1 to mix solids to be washed into slurry; the washed thiodicarb solid and fresh methanol which just enters the alcohol washing tower 4 are mixed, enter a centrifugal machine 9 through a mother liquor methanol feed pump 13 at the bottom of the tower, and the centrifuged solid material enters a subsequent drying section as a product, and the mother liquor methanol returns to the methanol storage tank 2.
Adding 8kg of the thiodicarb solid after water washing into a batching tank 1, mixing 13kg of the mixture with 5kg of methanol after washing into slurry, and continuously conveying the slurry into the upper part of an alcohol washing tower 4 at the speed of 18kg/h through a feed pump 10; fresh methanol enters a methanol tank 3, is heated by a fresh methanol feed pump 12 at a speed of 12kg/h through a heat exchanger 14 and is continuously fed into the lower part of an alcohol washing tower 4; nitrogen enters the nitrogen circulating tank 2, is continuously fed into the gas distributor 6 at the bottom of the alcohol washing tower 4 at the speed of 4Nm3/h through the nitrogen compressor 8, and is discharged from the top to enter the nitrogen storage tank 2; the methanol after washing is extracted from the methanol outlet 18 after washing by the methanol discharging pump 11 after washing at a speed of 15kg/h and is divided into two paths: one path of the waste methanol treatment section is removed at the speed of 2kg/h, and the other path of the waste methanol treatment section enters a material mixing tank 1 at the speed of 13kg/h to mix the solids to be washed into slurry; the washed thiodicarb solid and fresh methanol which just enters the alcohol washing tower 4 are mixed at the bottom of the tower, the mixture enters a centrifugal machine 9 through a thiodicarb discharge pump 13 at the speed of 15kg/h, the centrifuged solid material enters a subsequent drying working section as a product at the speed of 5kg/h, the mother liquor methanol returns to a methanol storage tank 2 at the speed of 10kg/h, the purity of the thiodicarb product after alcohol washing is increased from 97.12% to 98.32%, the residual methomyl is reduced from 0.71% to 0.23%, and the residence time is 2.5 hours.
Example 2
The utility model provides a thiodicarb alcohol washing serialization apparatus for producing, it includes batching jar 1, batching jar 1 upper portion is provided with material import 15 and the back methyl alcohol import 16 of washing of waiting, batching jar 1 bottom is provided with mixed thick liquid export 17, and mixed thick liquid export 17 is connected with the material feed inlet 20 on alcohol wash tower 4 upper portion through charge pump 10, alcohol wash tower 4 still includes back methyl alcohol export 18 and the nitrogen gas export 19 of setting up on upper portion, methyl alcohol feed inlet 23, product export 21 and nitrogen gas import 22 of setting up in the lower part, and inside inner skleeve 7 and the gas distributor 6 of being provided with of alcohol wash tower 4, methyl alcohol feed inlet 23 is connected with the bottom export of methyl alcohol jar 3 through heat exchanger 14, methyl alcohol jar 3 upper portion is provided with methyl alcohol feed inlet 28 and back thiodicarb import 29, and product export 21 is connected with the upper portion import 24 of centrifuge 9, centrifuge 9 still is provided with back thiodicarb export 26 and mother liquor methyl alcohol export 25, mother liquor export 25 and back thiodicarb import 29 are connected, nitrogen gas export 19 on alcohol wash tower 4 upper portion is connected with nitrogen gas storage tank 2 and nitrogen gas import 31, nitrogen gas import 31 is still provided with nitrogen gas import 31.
A feed pump 10 and a valve are arranged between the mixed slurry outlet 17 and the material feed inlet 20, a methanol discharge pump 11 is arranged between the washed methanol inlet 16 and the washed methanol outlet 18, a methanol feed pump 12 is arranged between the heat exchanger 14 and the bottom outlet 27, a mother liquor methanol feed pump 13 is arranged between the product outlet 21 and the upper inlet 24, a nitrogen compressor 8 is arranged between the mixed nitrogen outlet 31 and the nitrogen inlet 22, the nitrogen compressor 8 is also connected with the nitrogen storage tank 2, and the alcohol washing tower 3 is a bubbling tower, a single-stage loop reactor or a multistage loop reactor and is connected in parallel or in series.
The invention realizes continuous operation, simple flow, less equipment investment and stable product quality, and the fresh methanol carries out countercurrent washing on the washed thiodicarb in the alcohol washing tower 4; the continuous circulation flow device using nitrogen as power eliminates a stirrer, and reduces the power consumption by 50%; the multistage circulation flow continuous alcohol washing process with stronger stirring effect is adopted, the washed methanol is contacted with fresh materials, and the fresh methanol is contacted with purest materials, so that the driving force and the final washing purity of the whole washing process are improved, and the methanol consumption can be reduced by 30% under the same conditions; the invention has the advantages of high production capacity, environmental friendliness and high product quality.
Claims (7)
1. The thiodicarb alcohol washing continuous production process comprises a batching tank and is characterized in that: the upper part of the batching tank is provided with a material inlet to be washed and a methanol inlet after washing, the bottom of the batching tank is provided with a mixed slurry outlet, the mixed slurry outlet is connected with a material inlet at the upper part of the alcohol washing tower through a feed pump, the alcohol washing tower further comprises a methanol outlet and a nitrogen outlet after washing, which are arranged at the upper part, a methanol inlet, a product outlet and a nitrogen inlet which are arranged at the lower part, an inner sleeve and a gas distributor are arranged in the alcohol washing tower, the methanol inlet is connected with a bottom outlet of the methanol tank through a heat exchanger, the upper part of the methanol tank is provided with a methanol inlet and a thiodicarb inlet after washing, the product outlet is connected with an upper inlet of a centrifuge, the centrifuge is further provided with a thiodicarb outlet and a mother liquor methanol outlet, the mother liquor methanol outlet is connected with a thiodicarb inlet after washing, a nitrogen outlet at the upper part of the alcohol washing tower is connected with the upper part of a nitrogen storage tank, a fresh nitrogen inlet and a mixed nitrogen outlet are further arranged on the nitrogen storage tank, and the mixed nitrogen outlet is connected with a nitrogen inlet of the alcohol washing tower;
the thiodicarb alcohol washing continuous production process comprises the following steps:
step 1): adding the washed thiodicarb solid serving as a solid to be washed into a material mixing tank, mixing with washed methanol to form slurry, and continuously feeding the slurry into the upper part of an alcohol washing tower through a feed pump;
step 2): fresh methanol enters a methanol tank, is heated to 30-60 ℃ by a methanol feed pump through a heat exchanger and is continuously fed into the lower part of an alcohol washing tower;
step 3): nitrogen enters a nitrogen storage tank and is continuously fed into a nitrogen inlet at the bottom of the alcohol washing tower through a nitrogen compressor;
step 4): the bottom of the alcohol washing tower is provided with a gas distributor, and nitrogen enters the alcohol washing tower through the gas distributor;
step 5): the top of the alcohol washing tower is provided with a gas collector, nitrogen is separated at the top of the tower and is collected to return to a nitrogen storage tank, and the nitrogen is circularly returned to the alcohol washing tower through a nitrogen compressor;
step 6): the methanol after washing is separated into two paths through a methanol discharging pump from a methanol outlet after washing: one path of the waste methanol treatment section is removed, and the other path of the waste methanol treatment section enters a material mixing tank to mix the washed thiodicarb solid into slurry;
step 7): mixing the washed thiodicarb solid with fresh methanol which just enters the tower, and entering a centrifuge from a product outlet at the bottom of the alcohol washing tower;
step 8): the centrifuged solid material enters a subsequent drying working section, and the mother liquor methanol returns to a methanol storage tank.
2. The thiodicarb alcohol washing continuous production process according to claim 1, characterized in that: and a feed pump and a valve are arranged between the mixed slurry outlet and the material feed inlet.
3. The thiodicarb alcohol washing continuous production process according to claim 1, characterized in that: a methanol discharging pump is arranged between the washed methanol inlet and the washed methanol outlet.
4. The thiodicarb alcohol washing continuous production process according to claim 1, characterized in that: a methanol feed pump is arranged between the heat exchanger and the bottom outlet.
5. The thiodicarb alcohol washing continuous production process according to claim 1, characterized in that: and a mother liquor methanol feed pump is arranged between the product outlet and the upper inlet of the centrifugal machine.
6. The thiodicarb alcohol washing continuous production process according to claim 1, characterized in that: a nitrogen compressor is arranged between the mixed nitrogen outlet and the nitrogen inlet of the alcohol washing tower, and the nitrogen compressor is also connected with a nitrogen storage tank.
7. The thiodicarb alcohol washing continuous production process according to claim 1, characterized in that: the alcohol washing tower is a bubbling tower, a single-stage loop reactor or a multi-stage loop reactor, and is connected in parallel or in series.
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| CN201911215060.4A CN111036150B (en) | 2019-12-02 | 2019-12-02 | Thiodicarb alcohol washing continuous production process and device |
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| CN201911215060.4A CN111036150B (en) | 2019-12-02 | 2019-12-02 | Thiodicarb alcohol washing continuous production process and device |
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| CN114769204A (en) * | 2022-04-01 | 2022-07-22 | 金能科技股份有限公司 | Solid powdery material washing and impurity removing system and process |
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| CN111036150A (en) | 2020-04-21 |
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