CN117760791A - Safe and environment-friendly closed sampling device and method for synthesizing UV (ultraviolet) photocuring monomers - Google Patents
Safe and environment-friendly closed sampling device and method for synthesizing UV (ultraviolet) photocuring monomers Download PDFInfo
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- CN117760791A CN117760791A CN202311788168.9A CN202311788168A CN117760791A CN 117760791 A CN117760791 A CN 117760791A CN 202311788168 A CN202311788168 A CN 202311788168A CN 117760791 A CN117760791 A CN 117760791A
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- sampling
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- tank
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- 238000005070 sampling Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000178 monomer Substances 0.000 title claims abstract description 21
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 20
- 238000000016 photochemical curing Methods 0.000 title claims description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000003960 organic solvent Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000003786 synthesis reaction Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000003848 UV Light-Curing Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Abstract
The invention discloses a safe and environment-friendly closed sampling device for synthesizing UV light curing monomers, which comprises a sampling tank, wherein a feeding pipeline and a vacuum pipeline are respectively arranged at the top of the sampling tank; the feeding pipeline is connected with a sample outlet of the reaction kettle, and is provided with a discharge valve; the vacuum pipeline is provided with a vacuum valve; the bottom of the sampling tank is provided with a sampling pipeline, the sampling pipeline is connected with the sample bearing container to enable a sample entering the sampling tank to enter the sample bearing container, the sampling pipeline is provided with a sampling valve, the sampling valve is a three-way valve, and three valve ports of the three-way valve are respectively communicated with the sampling tank, the sample bearing container and the atmosphere. The invention also discloses a safe and environment-friendly closed sampling method for synthesizing the UV light curing monomer. The invention realizes closed sampling under negative pressure, and eliminates the waste of contact of the organic solvent with the external air, running out, dripping and the like of the feed liquid in the sampling process, thereby ensuring the safety of operators and preventing the organic solvent from diffusing and escaping to the atmosphere in the sampling process.
Description
Technical Field
The invention belongs to the field of reaction kettle equipment, and particularly relates to a safe and environment-friendly closed sampling device and method for synthesizing a UV (ultraviolet) light curing monomer.
Background
Sampling analysis is an important step in the chemical production process of organic synthesis and is used for judging whether the reaction is carried out to meet the requirement. The reaction mixture is sampled from the batch reactor, and the lower layer reaction mixture is generally required to be removed. The common practice is to disassemble the manhole cover and hang down a sampling bottle (or sampling cup) for sampling, the method is complex in operation, can expose operators to the components of the reaction kettle feed liquid such as solvent and volatile organic compounds, and can cause the components of the reaction kettle feed liquid to volatilize and diffuse into the atmosphere, so that the solvent is leaked, and the method is not safe and environment-friendly. The discharging is carried out from a valve at the bottom of the reaction kettle, but impurities in the valve and unreacted raw materials can greatly interfere a detection result, and the condition of a reaction system cannot be accurately reflected.
Disclosure of Invention
The invention aims to provide a safe and environment-friendly closed sampling device for synthesizing UV light-cured monomers, which is used for sampling an intermittent organic synthesis reaction kettle, so that the safety of operators can be ensured, and the diffusion and escape of organic solvents in the reaction kettle feed liquid to the atmosphere in the sampling process can be prevented.
The invention aims at realizing the following technical scheme:
the safe and environment-friendly closed sampling device for synthesizing the UV light curing monomer comprises a sampling tank, wherein a feeding pipeline and a vacuum pipeline are respectively arranged at the top of the sampling tank; the feeding pipeline is connected with a sample outlet of the reaction kettle, and is provided with a discharging valve; the vacuum pipeline is provided with a vacuum valve; the bottom of the sampling tank is provided with a sampling pipeline, the sampling pipeline is connected with the sample bearing container to enable a sample entering the sampling tank to enter the sample bearing container, the sampling pipeline is provided with a sampling valve, the sampling valve is a three-way valve, and three valve ports of the three-way valve are respectively communicated with the sampling tank, the sample bearing container and the atmosphere.
The sampling tank is a cylindrical tank body.
Preferably, the two ends of the cylindrical tank body are respectively provided with a sealing head.
The volume of the sampling tank is 0.5-10L
Preferably, a compressed air pipeline is arranged at the top of the sampling tank, and a compressed air valve is arranged on the compressed air pipeline; the bottom of the sampling tank is provided with a discharge pipeline, the discharge pipeline is connected with a feed pipeline of the synthesis kettle, and the discharge pipeline is provided with a discharge valve.
The invention also aims to provide a safe and environment-friendly closed sampling method for synthesizing the UV light-cured monomer based on the safe and environment-friendly closed sampling device for synthesizing the UV light-cured monomer, which comprises the following steps of:
step (1), opening a vacuum valve and a sampling valve to enable a sample receiving container to be communicated with a sampling tank and to be in a negative pressure state;
step (2), opening a discharging valve to enable the feed liquid in the reaction kettle to flow into a sampling tank, and enabling the feed liquid to enter a sample receiving container through a sampling pipeline;
and (3) closing the discharging valve and the vacuum valve, rotating the sampling valve to be communicated with the atmosphere, enabling the sample receiving container to be not communicated with the sampling tank, unloading the negative pressure state of the sample receiving container, taking down the sample receiving container and sealing the sample receiving container, and completing sampling.
As a preferable scheme of the safe and environment-friendly closed sampling method for synthesizing the UV light-cured monomer, the method further comprises the following steps:
and (4) opening a discharge valve and a compressed gas valve, and introducing compressed gas into the sampling tank to enable the residual feed liquid in the sampling pipe to be returned to the reaction kettle.
The compressed gas is at least one of nitrogen and other inert gases which do not burn or explode with the organic solvent; the pressure of the compressed gas is 0.8-1.0 MPa.
The invention has the beneficial effects that:
according to the invention, the sampling tank provided with the discharging valve, the vacuum valve, the compressed gas valve and the sampling valve is adopted for sampling, so that the lower-layer feed liquid in the reaction kettle is sampled under negative pressure, the whole sampling process is closed, the waste such as contact of an organic solvent and external air, leakage of feed liquid and the like is avoided in the sampling process, the safety of operators can be ensured, the diffusion and escape of the organic solvent to the atmosphere in the sampling process can be prevented, the safe and environment-friendly concept is practiced, and the Ultraviolet (UV) photocuring monomer synthesis reaction field is widely applied.
Drawings
FIG. 1 is a schematic diagram of a safe and environment-friendly closed sampling device for synthesizing UV light-cured monomers.
In FIG. 1, 1-sampling tank, 2-feed line, 3-vacuum line, 4-compressed gas line, 5-blow valve, 6-vacuum valve, 7-compressed gas valve, 8-sampling line, 9-sampling valve, 10-blow line, 11-blow valve.
Detailed Description
The technical scheme of the invention is further described below by referring to examples.
Example 1
As shown in fig. 1, the safe and environment-friendly closed sampling device for synthesizing the UV light-cured monomer comprises a sampling tank 1, wherein a feeding pipeline 2, a vacuum pipeline 3 and a compressed gas pipeline 4 are respectively arranged at the top of the sampling tank 1; the feeding pipeline 2 is connected with a sample outlet of the reaction kettle, and the feeding pipeline 2 is provided with a discharging valve 5; the vacuum pipeline 3 is provided with a vacuum valve 6; the compressed air pipeline 4 is provided with a compressed air valve 7; the bottom of the sampling tank 1 is respectively provided with a sampling pipeline 8 and a discharging pipeline 10, the sampling pipeline 8 is connected with a sample bearing container to enable a sample entering the sampling tank to enter the sample bearing container, the sampling pipeline 8 is provided with a sampling valve 9, the sampling valve 9 is a three-way valve, and three valve ports of the three-way valve are respectively communicated with the sampling tank, the sample bearing container and the atmosphere; the discharge pipeline 10 is connected with a feed pipeline of the synthesis kettle, and the discharge pipeline 10 is provided with a discharge valve 11.
The sampling tank 1 comprises a cylindrical tank body, and sealing heads are respectively arranged at two ends of the cylindrical tank body; the volume of the sampling tank 1 is 10L.
Example 2
Is a 60m 3 The closed sampling device described in the embodiment 1 is additionally arranged on the trimethylolpropane triacrylate synthesis reaction kettle, and a feeding pipeline 2 of the closed sampling device is connected with a sample outlet of the reaction kettle through a discharge valve 5 and is dischargedThe material pipeline 10 is connected with a feeding pipeline of the reaction kettle through a discharge valve 11, the compressed gas pipeline 4 is connected with a compressed nitrogen tank through a compressed gas valve 7, and a sampling valve 9 on a sampling pipeline 8 is respectively connected with a sample inlet of a sample receiving container and an atmospheric emptying pipeline; sampling was performed as follows:
step (1), opening a vacuum valve 6 and a sampling valve 9 to enable the sample receiving container to be communicated with the sampling tank 1 and to be in a negative pressure state;
step (2), opening a discharging valve 5, allowing the feed liquid in the reaction kettle to flow into a sampling tank 1, and then flowing into and filling a sample receiving container through a sampling pipeline 8;
step (3), closing the discharging valve 5 and the vacuum valve 6, rotating the sampling valve 9 to ensure that the sample receiving container is not communicated with the sampling tank any more, and is communicated with an atmospheric emptying pipeline, unloading the negative pressure state of the sample receiving container, taking down the sample receiving container, sealing and conveying to a laboratory for testing, and completing sampling;
and (4) opening a discharge valve 11 and a compressed gas valve 7, introducing compressed nitrogen with the pressure of 0.8-1.0 MPa, and completely pressing the residual feed liquid in the sampling tank back into the reaction kettle by using the compressed nitrogen.
The operation is smooth, and safe and environment-friendly airtight sampling operation is realized.
Claims (8)
- Safe and environment-friendly airtight sampling device for synthesizing UV (ultraviolet) photocuring monomers is characterized in that: the device comprises a sampling tank, wherein the top of the sampling tank is respectively provided with a feeding pipeline and a vacuum pipeline; the feeding pipeline is connected with a sample outlet of the reaction kettle, and is provided with a discharging valve; the vacuum pipeline is provided with a vacuum valve; the bottom of the sampling tank is provided with a sampling pipeline, the sampling pipeline is connected with the sample bearing container to enable a sample entering the sampling tank to enter the sample bearing container, the sampling pipeline is provided with a sampling valve, the sampling valve is a three-way valve, and three valve ports of the three-way valve are respectively communicated with the sampling tank, the sample bearing container and the atmosphere.
- 2. The safe and environment-friendly closed sampling device for synthesizing UV light-curable monomers according to claim 1, wherein the device comprises: the sampling tank is a cylindrical tank body.
- 3. The safe and environment-friendly closed sampling device for synthesizing UV light-curable monomers according to claim 2, wherein the device comprises: the two ends of the cylindrical tank body are respectively provided with a sealing head.
- 4. The safe and environment-friendly closed sampling device for synthesizing UV light-curable monomers according to claim 1, wherein the device comprises: the volume of the sampling tank is 0.5-10L.
- 5. The safe and environment-friendly closed sampling device for synthesizing UV light-curable monomers according to claim 1, wherein the device comprises: a compressed gas pipeline is arranged at the top of the sampling tank, and a compressed gas valve is arranged on the compressed gas pipeline; the bottom of the sampling tank is provided with a discharge pipeline, the discharge pipeline is connected with a feed pipeline of the synthesis kettle, and the discharge pipeline is provided with a discharge valve.
- 6. A safe and environment-friendly airtight sampling method for synthesizing a UV photo-curing monomer based on the airtight sampling device of claim 1, which is characterized in that: the method comprises the following steps:step (1), opening a vacuum valve and a sampling valve to enable a sample receiving container to be communicated with a sampling tank and to be in a negative pressure state;step (2), opening a discharging valve to enable the feed liquid in the reaction kettle to flow into a sampling tank, and enabling the feed liquid to enter a sample receiving container through a sampling pipeline;and (3) closing the discharging valve and the vacuum valve, rotating the sampling valve to be communicated with the atmosphere, enabling the sample receiving container to be not communicated with the sampling tank, unloading the negative pressure state of the sample receiving container, taking down the sample receiving container, sealing and completing sampling.
- 7. The safe and environment-friendly closed sampling method for synthesizing UV-curable monomers according to claim 6, wherein the method comprises the following steps: further comprises:and (4) opening a discharge valve and a compressed gas valve, and introducing compressed gas into the sampling tank to enable the residual feed liquid in the sampling pipe to be returned to the reaction kettle.
- 8. The safe and environment-friendly closed sampling method for synthesizing UV light-curable monomers according to claim 7, wherein the method comprises the following steps: the compressed gas is at least one of nitrogen and inert gas which does not burn or explode with the organic solvent; the pressure of the compressed gas is 0.8-1.0 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311788168.9A CN117760791A (en) | 2023-12-25 | 2023-12-25 | Safe and environment-friendly closed sampling device and method for synthesizing UV (ultraviolet) photocuring monomers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311788168.9A CN117760791A (en) | 2023-12-25 | 2023-12-25 | Safe and environment-friendly closed sampling device and method for synthesizing UV (ultraviolet) photocuring monomers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117760791A true CN117760791A (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311788168.9A Pending CN117760791A (en) | 2023-12-25 | 2023-12-25 | Safe and environment-friendly closed sampling device and method for synthesizing UV (ultraviolet) photocuring monomers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117760791A (en) |
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2023
- 2023-12-25 CN CN202311788168.9A patent/CN117760791A/en active Pending
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