CN220525753U - Detection device for determining TAD content in PA6 production process - Google Patents
Detection device for determining TAD content in PA6 production process Download PDFInfo
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- CN220525753U CN220525753U CN202321560615.0U CN202321560615U CN220525753U CN 220525753 U CN220525753 U CN 220525753U CN 202321560615 U CN202321560615 U CN 202321560615U CN 220525753 U CN220525753 U CN 220525753U
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- China
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- test solution
- laboratory bench
- utility
- tad content
- reagent tank
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- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000012085 test solution Substances 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 4
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 22
- 239000000243 solution Substances 0.000 description 14
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 9
- 229940012189 methyl orange Drugs 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 238000004448 titration Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 238000003918 potentiometric titration Methods 0.000 description 2
- 239000012086 standard solution Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 241000132064 Ainsliaea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- STZCRXQWRGQSJD-UHFFFAOYSA-M sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(C)C)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The utility model discloses a detection device for determining the TAD content in the PA6 production process, which comprises a reagent tank for storing collected test solution, wherein the lower end of the reagent tank is provided with a laboratory bench for supporting the reagent tank, a constant-temperature heating box for heating the collected test solution is arranged on the laboratory bench positioned at the side of the reagent tank, a magnetic stirrer for stirring the heated test solution is arranged on the laboratory bench positioned at the side of the constant-temperature heating box, and a potentiometric titrator for detecting the TAD content of the test solution is arranged on the laboratory bench positioned at the side of the magnetic stirrer. The utility model solves the problem of lower accuracy of measurement results caused by difficult control of the dripping amount of the traditional TAD content detection method in the prior art. The utility model has the advantages of stable and reliable measurement result, high working efficiency and the like.
Description
Technical Field
The utility model relates to the field of experimental device structures, in particular to a detection device for determining the TAD content in the PA6 production process.
Background
At present, china patent net discloses a variety of Aishi sulfur measuring instruments with methyl orange indication function, publication No. CN105158242A, which belongs to the field of automatic measuring equipment for sulfur content in coal. The device comprises an Airy sample manufacturing device, a combustion furnace, a solution stirring device, a first filtering device, a methyl orange indicating device, a second filtering device, a room temperature weighing device and a control system, wherein the Airy sample manufacturing device, the combustion furnace, the solution stirring device, the first filtering device, the methyl orange indicating device, the second filtering device, the room temperature weighing device and the control system are fixed on a bottom plate; the methyl orange indicating device is arranged between the first filtering device and the second filtering device and comprises an L-shaped frame, a camera shooting frame, an extrusion module, a drip tube frame and a beaker, wherein the camera shooting frame, the extrusion module, the drip tube frame and the beaker are arranged on the L-shaped frame from top to bottom, a high-definition camera arranged on the camera shooting frame, a dropper arranged on the drip tube frame, a PC (personal computer) and a data line for connecting the high-definition camera and the PC. The utility model relates to an Ainsliaea sulfur detector with a methyl orange indication function, which not only can automatically drip a methyl orange indicator, but also can automatically control the flow of a methyl orange solution through the color comparison of a PC (personal computer).
The range of methyl orange color change is 3.1-4.4, the pH value is less than 3.1, the color is red, the pH value is more than 4.4, the color is yellow, the color is orange between the pH value of 3.1-4.4, and if the color change is used for detecting and measuring the TAD content in the PA6 production process, certain defects exist.
Firstly, since the caprolactam is generally mixed with acidic and alkaline additives at the same time when full-extinction and half-extinction PA6 slices are produced, the acidic additives are usually more than the alkaline additives, the pH value of the prepared tested solution is between 5 and 6, and the pH value is relatively close to the color changing gamut of methyl orange, which is unfavorable for controlling the dripping amount.
The second disadvantage is that titanium dioxide is added when full-extinction and half-extinction PA6 slices are produced, and titanium dioxide yellowness indexes YIE produced by different manufacturers are different, so that the hot-melt caprolactam mixture material usually presents greyish yellow, and the manual titration process is more unfavorable for observing color change after the methyl orange indicator is added into the measured solution, so that the titration end point cannot be accurately judged, and a larger error exists in the titration result.
Disclosure of Invention
The utility model aims to solve the problem that the accuracy of a measurement result is low due to the fact that the dripping amount is difficult to control in the traditional TAD content detection method in the prior art, and provides a detection device for determining the TAD content in the PA6 production process with high measurement accuracy.
The utility model discloses a detection device for determining the TAD content in the PA6 production process, which comprises a reagent tank for storing collected test solution, wherein the lower end of the reagent tank is provided with a laboratory bench for supporting the reagent tank, a constant-temperature heating box for heating the collected test solution is arranged on the laboratory bench positioned at the side of the reagent tank, a magnetic stirrer for stirring the heated test solution is arranged on the laboratory bench positioned at the side of the constant-temperature heating box, and a potentiometric titrator for detecting the TAD content of the test solution is arranged on the laboratory bench positioned at the side of the magnetic stirrer.
The constant temperature heating cabinet can adopt the model: DHG-9023A; the magnetic stirrer can be of the type: DF-101S; the potentiometric titrator can be of the following type: ZD-2.
During operation, the sample is first treated, the caprolactam mixture solution is then set inside one constant temperature heating box at 80 deg.c in a sealable high temperature container until the mixture solution is melted completely and needs to be shaken evenly for use. After weighing, the prepared measured solution is placed on a magnetic stirrer to be stirred for 2-3min so as to ensure that the measured solution is completely dissolved.
Then, the concentration of the titrant is selected, and 0.1mol/L HcL, 0.2mol/L HcL and 0.5mol/L HcL are respectively used as standard titration solutions, and experimental results show that the potential mutation is not obvious when 0.1mol/L HcL is used as the titrant, so that the experimental requirements are difficult to meet. There were significant mutations when titrating solutions of hydrochloric acid of 0.2mol/L HcL and 0.5mol/L HcL or more were used as the titrant. In consideration of quality control cost and suitability of the tested solution configuration, the experiment optimally selects 0.2mol/L HcL standard solution as a titrant.
Detecting the TAD content in the caprolactam mixed material, preparing caprolactam mixed material solutions with different concentrations by taking 30ml of pure water as a solvent, performing potentiometric titration by taking 0.2mol/L HcL standard solution as a titrant, taking a composite pH glass electrode as a titration electrode, and determining the titration mode of a potentiometric titrator as DET. The use of potentiometric titrators was as follows: 1916001036430, composite pH glass electrode serial number: 21087859.
preparing a graph with the concentration of 1000g/L, measuring the repeatability and precision of the TAD content in the caprolactam mixed material by a potentiometric titration method, taking a caprolactam mixed material solution for production, randomly weighing the caprolactam mixed material with the mass of 27g-32g, and accurately measuring to 0.1mg.
Reproducibility experiments for detecting TAD content in caprolactam mixture by another experimenter using a caprolactam mixture solution in 2.3.4 using another potentiometric titrator sequence: 1916001036429, composite pH glass electrode serial number: 21087810. the same instrument method is set, and 25-30g of caprolactam mixed material is weighed to be accurate to 0.1mg.
The utility model has the following beneficial effects: the potentiometric titrator is used for detecting the TAD content, the titration endpoint is not required to be judged by the color change, the stoichiometric point is automatically identified according to the potential change, the result is more stable and reliable, and the working efficiency is greatly improved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Reagent jar 1, laboratory bench 2, constant temperature heating cabinet 3, magnetic stirrer 4, potentiometre 5.
Detailed Description
The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.
Examples: according to the detection device for determining the TAD content in the PA6 production process, which is further described in the following description of the accompanying drawings, the detection device comprises a reagent tank 1 for storing collected test solution, wherein a laboratory bench 2 for supporting the reagent tank 1 is arranged at the lower end of the reagent tank 1, a constant-temperature heating box 3 for heating the collected test solution is arranged on the laboratory bench 2 arranged at the side of the reagent tank 1, a magnetic stirrer 4 for stirring the test solution after the heating treatment is arranged on the laboratory bench 2 arranged at the side of the constant-temperature heating box 3, and a potentiometric titrator 5 for detecting the TAD content of the test solution is arranged on the laboratory bench 2 arranged at the side of the magnetic stirrer 4.
The above embodiments are merely examples of the present utility model, but the present utility model is not limited thereto, and any changes or modifications made by those skilled in the art are included in the scope of the present utility model.
Claims (1)
1. The utility model provides a detection device for determining TAD content in PA6 production process, including being used for preserving reagent jar (1) of the test solution that gathers, characterized by, reagent jar (1) lower extreme be equipped with laboratory bench (2) that are used for supporting reagent jar (1), be equipped with on laboratory bench (2) that are located reagent jar (1) side and be used for carrying out heating treatment's constant temperature heating cabinet (3) with the test solution that gathers, be equipped with on laboratory bench (2) that are located constant temperature heating cabinet (3) side and be used for carrying out magnetic stirrer (4) of stirring processing with the test solution after heating treatment, be equipped with potentiometre (5) that carry out TAD content detection to the test solution on laboratory bench (2) that are located magnetic stirrer (4) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321560615.0U CN220525753U (en) | 2023-06-19 | 2023-06-19 | Detection device for determining TAD content in PA6 production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321560615.0U CN220525753U (en) | 2023-06-19 | 2023-06-19 | Detection device for determining TAD content in PA6 production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220525753U true CN220525753U (en) | 2024-02-23 |
Family
ID=89932977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321560615.0U Active CN220525753U (en) | 2023-06-19 | 2023-06-19 | Detection device for determining TAD content in PA6 production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220525753U (en) |
-
2023
- 2023-06-19 CN CN202321560615.0U patent/CN220525753U/en active Active
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