Alloy materials, capture tubes and traps for detecting and analyzing amine substances

Abstract

The present invention provides an alloy material, a capture tube, a capture trap, and a capture trap-chromatograph series analysis system for detecting and analyzing the capture of amine substances, and relates to the field of substance capture detection technology. The alloy material for detecting and analyzing the capture of amine substances is mainly made of elements such as iron, chromium, nickel, molybdenum and manganese in a specific proportion, wherein iron is mainly used to provide adsorption sites to achieve efficient capture of amine substances, and other elements coordinated with iron, in addition to improving the structural strength of the alloy material, also provide corrosion resistance to improve the stability of the alloy material in ambient air and heating-cooling conditions; through the coordinated coordination of the above elements, the alloy material has a high amine substance capture efficiency, and also has good moisture resistance, water resistance, long-term storage capacity and long-term use stability. The present invention also provides a capture tube, which is mainly made of the above-mentioned alloy material for detecting and analyzing the capture of amine substances.

Description

Technical Field

[0001] The present invention relates to the technical field of substance capture and detection, and in particular to an alloy material, a capture tube, a capture trap, and a capture trap-chromatograph series analysis system for detecting and analyzing the capture of amine substances. Background Art

[0002] Conventional monitoring methods for amines in ambient air have detection limits exceeding both the human olfactory threshold and environmental standard thresholds, necessitating pretreatment techniques involving enrichment pretreatment. Conventional fillers (such as Tenax, Hayesep, Carbosieve, Carbopack / Carboxen, and silica gel) used as enrichment adsorbents in capture tubes are affected by water, oxygen, and other components in the ambient air, resulting in a dramatic reduction in their effective storage time and service life. This makes them unable to meet the requirements of online monitoring technology and unsuitable for the long-term, stable capture of amines. Therefore, a capture material with long-term storage, a long service life, and excellent moisture and oxygen resistance is urgently needed to effectively capture amines in ambient air.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The first object of the present invention is to provide an alloy material for detecting and analyzing the capture of amine substances, so as to solve at least one technical problem existing in the prior art.

[0005] The second object of the present invention is to provide a capture tube made of the above alloy material for detecting and analyzing the capture of amine substances.

[0006] A third object of the present invention is to provide a capture trap comprising the capture tube.

[0007] A fourth object of the present invention is to provide a trap-chromatograph serial analysis system comprising the above-mentioned trap tube or trap.

[0008] In order to achieve the above object, the technical solution of the present invention is as follows:

[0009] The present invention provides an alloy material for detecting and analyzing the capture of amine substances, comprising the following components in mass fractions:

[0010] Iron 69%-71%, chromium 14%-16%, nickel 11%-12%, molybdenum 2.2%-2.5% and manganese 0.5%-0.7%.

[0011] Furthermore, based on the above technical solution of the present invention, the alloy material for detecting and analyzing the capture of amine substances includes the following components in mass fractions:

[0012] Iron 68%-69%, chromium 14%-15%, nickel 11.5%-12%, molybdenum 2.3%-2.4% and manganese 0.5%.

[0013] Furthermore, based on the above technical solution of the present invention, the capture temperature of the alloy material when capturing amine substances is 0°C-40°C.

[0014] The present invention provides a capture tube made of the alloy material for detecting and analyzing the capture of amine substances.

[0015] Furthermore, based on the above technical solution of the present invention, the capture tube includes a tube body, and the tube body is mainly made of an alloy material used for detecting and analyzing the capture of amine substances.

[0016] Furthermore, based on the above technical solution of the present invention, adsorption particles are provided in the tube body, and the adsorption particles are mainly made of an alloy material used for detecting and analyzing the capture of amine substances.

[0017] Furthermore, based on the above technical solution of the present invention, a wire mesh is provided in the tube body, and the wire mesh is arranged circumferentially along the inner wall of the tube body. The wire mesh is mainly made of an alloy material used for detecting and analyzing the capture of amine substances.

[0018] The present invention also provides a capture trap, comprising the capture tube;

[0019] Preferably, the capture trap further includes a mounting joint, a heating lug, a thermocouple and a thermocouple connecting wire, wherein the mounting joint is connected to one end of the capture tube through the heating lug, the other end of the capture tube is connected to the thermocouple, and the thermocouple is connected to the thermocouple connecting wire.

[0020] The present invention also provides a trap-chromatograph series analysis system, comprising the above-mentioned trap tube or the above-mentioned trap.

[0021] The present invention also provides the use of the above-mentioned capture tube, capture trap or capture trap-chromatograph series analysis system in capturing, analyzing or detecting amine substances.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] (1) The present invention provides an alloy material for detecting and analyzing the capture of amine substances, which is mainly made of elements such as iron, chromium, nickel, molybdenum and manganese in specific proportions. Among them, iron is mainly used to provide adsorption sites to achieve efficient capture of amine substances, and other elements (such as chromium, nickel, molybdenum and manganese) coordinated with iron, in addition to improving the structural strength of the alloy material, also provide corrosion resistance to improve the long-term stability of the alloy material in ambient air and under continuous heating-cooling conditions. Through the synergistic coordination of the above elements, the alloy material has a high amine substance capture efficiency, and also has good moisture resistance, water resistance, long-term storage capacity and long-term use stability.

[0024] (2) The present invention provides a capture tube, which is mainly made of the alloy material for detecting and analyzing the capture of amine substances. In view of the advantages of the above alloy material, the capture tube has the same advantages.

[0025] (3) The present invention also provides a trap or a trap-chromatograph serial analysis system, comprising the above-mentioned trap tube. In view of the advantages of the above-mentioned trap tube, the trap or chromatograph comprising the same also has the same advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A simplified structural diagram of the capture tube provided by the present invention;

[0028] Figure 2 A physical diagram of the capture trap provided by the present invention;

[0029] Figure 3 The peak spectrum obtained in Example 4;

[0030] Figure 4 This is the peak spectrum obtained in Example 7;

[0031] Figure 5 This is the peak spectrum obtained in Example 8;

[0032] Figure 6 This is the peak spectrum of Experimental Example 3 before water injection;

[0033] Figure 7 This is the peak spectrum after water injection in Experimental Example 3.

[0034] Icons: 1-installation connector; 2-heating lug; 3-collecting tube; 4-thermocouple; 5-thermocouple connecting wire. DETAILED DESCRIPTION

[0035] The embodiments of the present invention will be described in detail below in conjunction with the embodiments and examples, but it will be understood by those skilled in the art that the following embodiments and examples are only used to illustrate the present invention and should not be considered as limiting the scope of the present invention. If specific conditions are not specified, the conditions according to conventional conditions or manufacturer's recommendations are followed. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0036] According to a first aspect of the present invention, there is provided an alloy material for detecting and analyzing the capture of amine substances, comprising the following components in mass fractions:

[0037] Iron 69%-71%, chromium 14%-16%, nickel 11%-12%, molybdenum 2.2%-2.5% and manganese 0.5%-0.7%.

[0038] In the present invention, the amine substances that can be captured include organic amines, such as methylamine, dimethylamine, trimethylamine, and diethylamine.

[0039] In the alloy material of the present invention, the iron element provides the main adsorption sites, which are used to capture amine substances. The amount of iron element used needs to be limited. If the mass fraction of iron is too high (over 70%), it is easy to cause the toughness, ductility and corrosion resistance of the material to decrease. If the mass fraction of iron is too low (over 68%), it is easy to cause thermal cracking or solidification cracking. Therefore, the typical but non-restrictive mass fraction of iron is 69.0%, 69.2%, 69.3%, 69.4%, 69.5%, 68.6%, 68.8%, 68.9%, 70.0%, 70.1%, 70.2%, 70.3%, 70.4%, 70.5%, 70.6%, 70.7%, 70.8%, 70.9% or 71.0%.

[0040] In addition to improving the structural strength of the alloy material, other elements combined with iron in the alloy material also provide corrosion resistance to improve the long-term stability of the alloy material in ambient air and under continuous heating-cooling conditions. Specifically, nickel and chromium are used to resist oxidative corrosion. Since the specific application scenario of the alloy material is a capture tube or a capture trap, the enrichment-desorption process that occurs in this scenario is carried out under high-temperature oxygen-containing conditions. Nickel and chromium are added to resist the corrosion of iron by high-temperature oxidizing conditions and other gaseous impurities (such as sulfides). Molybdenum is added to improve corrosion resistance to reducing conditions (such as acidic conditions). Manganese is added to increase structural strength.

[0041] The amounts of chromium, nickel, molybdenum and manganese also need to be within specific numerical ranges. Exceeding these ranges will result in increased costs.

[0042] Typical but non-limiting mass fractions of chromium are 14.0%, 14.2%, 14.4%, 14.5%, 14.6%, 14.7%, 14.8%, 15.0%, 15.2%, 15.3%, 15.4%, 15.5%, 15.6%, 15.8%, 15.9% or 16.0%.

[0043] Typical but non-limiting mass fractions of nickel are 11.0%, 11.1%, 11.2%, 11.3%, 11.4%, 11.5%, 11.6%, 11.7%, 11.8%, 11.9% or 12.0%.

[0044] Typical but non-limiting mass fractions of molybdenum are 2.20%, 2.25%, 2.30%, 2.35%, 2.40%, 2.45% or 2.50%.

[0045] It should be noted that the phrases "comprising" and "mainly consisting of" in the present invention mean that the alloy may include other components in addition to the components stated, and these components impart different properties to the alloy. Furthermore, the phrases "comprising" and "mainly consisting of" in the present invention can also be replaced with the closed-ended phrases "being" or "being made of."

[0046] The present invention provides an alloy material for detecting and analyzing the capture of amines. The alloy material is primarily composed of elements such as iron, chromium, nickel, molybdenum, and manganese in specific proportions. Iron is primarily used to provide adsorption sites for efficient capture of amines, while the other elements (such as chromium, nickel, molybdenum, and manganese) combined with iron not only enhance the structural strength of the alloy material but also provide corrosion resistance, thereby improving the long-term stability of the alloy material in ambient air and under continuous heating and cooling conditions. Through the synergistic coordination of the above elements, the alloy material has a high amine capture efficiency, while also exhibiting good moisture and water resistance, long-term storage capacity, and long-term stability.

[0047] As an optional embodiment of the present invention, the alloy material used for detecting and analyzing the capture of amine substances includes the following components in mass fractions:

[0048] Iron 69%-71%, chromium 14%-15%, nickel 11.5%-12%, molybdenum 2.3%-2.4% and manganese 0.5%.

[0049] By further limiting the mass fraction of each component, the performance of the alloy material is improved in all aspects.

[0050] As an optional embodiment of the present invention, the capture temperature of the alloy material when capturing amine substances is 0°C-40°C.

[0051] The alloy material can capture amines at room temperature or low temperature. In addition, it can quickly desorb the captured amines at high temperature (>120°C).

[0052] According to a second aspect of the present invention, there is provided a capture tube made of the above-mentioned alloy material for detecting and analyzing the capture of amine substances.

[0053] In view of the advantages of the above alloy materials, the collecting tube made of the alloy materials also has the same advantages.

[0054] The specific structure of the capture tube can be further optimized.

[0055] As an optional embodiment of the present invention, the capture tube includes a tube body, which is mainly made of an alloy material used for detecting and analyzing the capture of amine substances. The specific structure is as follows Figure 1 As shown in Figure A. That is, the structure of the collection tube is a hollow tube, and the collection of amine substances is achieved through the tube body itself.

[0056] Generally speaking, the specific structure of the tube body can be set according to actual needs. For example, the outer diameter of the tube body is 1 / 16 inch, the inner diameter is 1 mm, and the length is 24 cm.

[0057] As an optional embodiment of the present invention, the capture tube includes a tube body, and adsorption particles are arranged in the tube body. The tube body and the adsorption particles are mainly made of an alloy material for detecting and analyzing the capture of amine substances. The specific structure is as follows Figure 1 As shown in B. That is, the structure of the collection tube is in the shape of a filler, and the amine substances are collected by the tube body and the adsorption particles filled in the tube body.

[0058] The shape of the adsorption particles can be spherical or irregular, and the particle size of the adsorption particles can be selected according to actual needs. For example, the particle size of the adsorption particles ranges from 60 mesh to 80 mesh.

[0059] As an optional embodiment of the present invention, the capture tube includes a tube body, a wire mesh is arranged in the tube body, and the wire mesh is arranged circumferentially along the inner wall of the tube body. The tube body and the wire mesh are mainly made of an alloy material for detecting and analyzing the capture of amine substances. The specific structure is as follows Figure 1 As shown in Figure C. That is, the structure of the collection tube is a wall-attached wire mesh, and the amine substances are captured by the tube body and the wire mesh attached to the tube body.

[0060] Theoretically, the degree of adsorption of amines in the collection tube (collection efficiency) is positively correlated with the surface area of ​​the collection tube (alloy material) (number of adsorption sites / residence time of gas on the flow path surface). Figure 1 The collection efficiency of the hollow tube type collection tube is the lowest. Figure 2 The collection efficiency of the medium-filled collection tube is the highest. However, the degree of adsorption of amines in the collection tube is also related to the state of the gas fluid. A slower gas flow rate is conducive to the adsorption of amines, and the gas flow rate of the empty tube is the slowest, while the gas flow rate of the filled tube is the fastest. Figure 3 The wall-attached wire mesh form (a layer of wire mesh alloy material is attached to the inner wall of the collection tube) takes into account both a higher alloy material surface area and a slower gas flow rate, so a higher capture efficiency can be obtained.

[0061] There is no specific limitation on the method for manufacturing the collection tube, and the collection tube can be manufactured using conventional techniques in the art.

[0062] According to a third aspect of the present invention, a capture trap is provided, comprising the capture tube described above.

[0063] In view of the advantages of the above-mentioned capture tube, the capture trap containing the same also has a high capture efficiency for amine substances.

[0064] As an optional embodiment of the present invention, the capture trap further includes a mounting joint 1, a heating terminal block 2, a thermocouple 4 and a thermocouple connecting wire 5. The mounting joint 1 is connected to one end of the capture tube 3 through the heating terminal block 2, the other end of the capture tube 3 is connected to the thermocouple 4, and the thermocouple 4 is connected to the thermocouple connecting wire 5. The specific physical diagram is as follows Figure 4 shown.

[0065] The trap works by adsorbing amines through the trap material at temperatures between 0°C and 40°C (low or room temperature). During desorption and sample injection, the trap tube temperature is controlled within the 100-200°C range by electrically heating the trap tube using a thermocouple and a wiring lug, rapidly desorbing the adsorbed amines.

[0066] According to a third aspect of the present invention, a chromatograph is provided, comprising the above-mentioned capture tube or the above-mentioned capture trap.

[0067] In view of the advantages of the above-mentioned capture tube or the above-mentioned capture trap, the chromatograph comprising the same also has the same advantages.

[0068] According to a fourth aspect of the present invention, there is also provided the use of the above-mentioned capture tube, capture trap or chromatograph in capturing, analyzing or detecting amine substances.

[0069] In view of the advantages of the above-mentioned capture tube, capture trap or chromatograph, it has good application prospects in the technical field of capturing, analyzing or detecting amine substances.

[0070] The present invention will be further described below with reference to specific embodiments and comparative examples.

[0071] Example 1

[0072] This embodiment provides an alloy material for detecting and analyzing the capture of amine substances, including the following components in mass fractions:

[0073] Iron 69.57%, chromium 15.69%, nickel 11.82%, molybdenum 2.38% and manganese 0.54%.

[0074] Example 2

[0075] This embodiment provides an alloy material for detecting and analyzing the capture of amine substances, including the following components in mass fractions:

[0076] Iron 70.68%, chromium 15.22%, nickel 11.40%, molybdenum 2.20% and manganese 0.50%.

[0077] Example 3

[0078] This embodiment provides an alloy material for detecting and analyzing the capture of amine substances, including the following components in mass fractions:

[0079] Iron 69.33%, chromium 15.97%, nickel 11.97%, molybdenum 2.22% and manganese 0.51%.

[0080] Example 4

[0081] This embodiment provides a capture tube, including a tube body, the composition of which is the alloy material for detecting and analyzing the capture of amine substances provided in Example 1.

[0082] Example 5

[0083] This embodiment provides a capture tube, including a tube body composed of the alloy material for detecting and analyzing the capture of amine substances provided in Example 2.

[0084] Example 6

[0085] This embodiment provides a capture tube, including a tube body composed of the alloy material for detecting and analyzing the capture of amine substances provided in Example 3.

[0086] Example 7

[0087] This embodiment provides a capture tube, including a tube body, the tube body having an outer diameter of 1 / 16 inch, an inner diameter of 1 mm, and a length of 24 cm. A wire mesh is provided inside the tube body, the thickness of the wire mesh is 0.2 mm, and the wire mesh is arranged circumferentially along the inner wall of the tube body. The tube body and the wire mesh are mainly made of the alloy material for detecting and analyzing the capture of amine substances provided in Example 1. The specific structure is as follows Figure 1 As shown in C.

[0088] Example 8

[0089] This embodiment provides a collection tube, except that the tube body is not provided with a wire mesh, but is provided with adsorption particles, the average particle size of the adsorption particles is 45-60 mesh, and the rest of the structure is the same as that of embodiment 4. The specific structure is as follows: Figure 1 As shown in B.

[0090] Experimental Example 1

[0091] The capture tubes provided in Examples 4, 5, and 6 were connected to other components (mounting connector, heating lug, thermocouple, and thermocouple connecting wire) to form a capture trap, which was then applied to a chromatograph using a DB-1 chromatographic column and an NPD detector.

[0092] A 10 ppb trimethylamine standard gas was prepared and the gas was introduced into the chromatograph for detection under the same sampling volume and experimental conditions. The specific results are shown below.

[0093] Table 1

[0094]

[0095] From the data in Table 1, it can be seen that there is no significant difference in relative standard deviation among the three embodiments, but in terms of the absolute value of the response, the peak response of Example 4 is the highest.

[0096] Experimental Example 2

[0097] The Bujiguan provided in Examples 4, 7, and 8 were connected to other components (mounting connector, heating lug, thermocouple, and thermocouple connecting wire) to form a trap, and the trap was applied to a chromatograph using a DB-1 chromatographic column and an NPD detector.

[0098] Prepare 10ppb trimethylamine standard gas, and pass the gas into the chromatograph for detection under the same sampling volume and experimental conditions. The peak spectrum is as follows Figure 3-Figure 5 shown.

[0099] from Figure 3-Figure 5 From the spectra, it can be seen that there is no significant difference in the peak areas measured by the three traps with different internal structures. Figure 3 The corresponding peak shape of Example 4 is the best.

[0100] Experimental Example 3

[0101] In order to verify the long-term stability of the capture tube, the capture tube provided in Example 4 was made into a capture trap and placed in a chromatograph using a DB-1 chromatographic column and an NPD detector to detect trimethylamine standard gas at a concentration of 20 ppb.

[0102] Experimental date 1 2 3 average value Relative standard deviation 9.24 1643.47 1671.70 1672.89 1662.69 1.00％ 10.8 1728.25 1695.06 1726.82 1716.71 1.09％

[0103] from Figure 6 It can be seen from the figure that the above-mentioned capture tube can still maintain a stable response after being used continuously for 2 weeks.

[0104] In order to verify the water and moisture resistance of the trapping tube, liquid water (0.1 mL) was directly injected into the trapping tube provided in Example 4. The trap was then aged at high temperature and placed in a chromatograph with device DB-1 and NPD detector to detect 20 ppb trimethylamine standard gas.

[0105] from Figure 6 and 7 It can be seen from the figure that after liquid water is directly injected into the above-mentioned collection tube, the operation can still maintain a good response, which proves that the collection tube has good water and moisture resistance.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A capture trap, characterized in that: The device comprises a collecting tube, a mounting joint, a heating lug, a thermocouple and a thermocouple connecting wire, wherein the mounting joint is connected to one end of the collecting tube via the heating lug, the other end of the collecting tube is connected to the thermocouple, and the thermocouple is connected to the thermocouple connecting wire; The capture tube is made of an alloy material used for detecting and analyzing the capture of amine substances; The alloy material for detecting and analyzing the capture of amine substances includes the following components in mass fractions: Iron 69%-71%, chromium 14%-16%, nickel 11%-12%, molybdenum 2.2%-2.5% and manganese 0.5%-0.7%.

2. The capture trap according to claim 1, characterized in that The alloy material for detecting and analyzing the capture of amine substances includes the following components in mass fractions: Iron 69%-71%, chromium 14%-15%, nickel 11.5%-12%, molybdenum 2.3%-2.4% and manganese 0.5%.

3. The capture trap according to claim 1 or 2, characterized in that: The capture temperature of the alloy material when capturing amine substances is 0°C-40°C.

4. The capture trap according to claim 1, wherein: The capture tube comprises a tube body, which is mainly made of an alloy material used for detecting and analyzing the capture of amine substances.

5. The capture trap according to claim 4, characterized in that Adsorption particles are arranged in the tube body, and the adsorption particles are mainly made of an alloy material used for detecting and analyzing the capture of amine substances.

6. The capture trap according to claim 4, characterized in that A wire mesh is arranged in the tube body and is arranged circumferentially along the inner wall of the tube body. The wire mesh is mainly made of an alloy material used for detecting and analyzing the capture of amine substances.

7. A trap-chromatograph tandem analysis system, characterized in that: The invention comprises the capture trap according to any one of claims 1 to 6.

8. Use of the capture trap according to any one of claims 1 to 6 or the capture trap-chromatograph tandem analysis system according to claim 7 in capturing, analyzing or detecting amine substances.

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