CN220525753U - Detection device for determining TAD content in PA6 production process - Google Patents

Detection device for determining TAD content in PA6 production process Download PDF

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Publication number
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
Prior art keywords
test solution
laboratory bench
utility
tad content
reagent tank
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CN202321560615.0U
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Chinese (zh)
Inventor
宗承宇
朱晨西
郝好
徐新梅
李泳静
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Shandong Jushun Luhua New Material Co ltd
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Shandong Jushun Luhua New Material Co ltd
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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

Detection device for determining TAD content in PA6 production process
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.
CN202321560615.0U 2023-06-19 2023-06-19 Detection device for determining TAD content in PA6 production process Active CN220525753U (en)

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

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CN202321560615.0U Active CN220525753U (en) 2023-06-19 2023-06-19 Detection device for determining TAD content in PA6 production process

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CN (1) CN220525753U (en)

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