Device for measuring concentration of triisobutyl aluminum

Abstract

The utility model discloses a device for measuring the concentration of triisobutyl aluminum, which comprises a magnetic stirrer, a triangular titration bottle is arranged at the top of the magnetic stirrer, a metering control mechanism is arranged at the top of the triangular titration bottle, one side of the metering control mechanism is communicated with a liquid guide pipe, and a titration solution reagent bottle is arranged at one end of the liquid guide pipe. The top of the titration solution reagent bottle is communicated with a nitrogen supply and delivery pipe, the middle of the nitrogen supply and delivery pipe is communicated with an exhaust pipe, one end of the exhaust pipe is provided with a high-purity nitrogen steel cylinder, one side of the triangulation bottle is communicated with a waste liquid pipe, one end of the waste liquid pipe is provided with a waste liquid collecting bottle, and the other side of the triangulation bottle is provided with a waste gas pipe; the device for measuring the concentration of the triisobutyl aluminum is safer and more stable to use and good in leakproofness in the use process, toxic substance volatilization, environment pollution and personnel poisoning are avoided, a filter for removing moisture is omitted, and the concentration test can be more accurate.

Description

Technical Field

[0001] The utility model relates to the field of triisobutylaluminum, in particular to a device for measuring the concentration of triisobutylaluminum. Background Art

[0002] Triisobutylaluminum, a catalyst raw material for rubber production, is extremely active. It will spontaneously ignite when exposed to air, and react strongly with water, acid, alcohol, and ammonia and explode. It can emit strong smoke or catch fire in the air, which can burn the human body. The container for determining the concentration of triisobutylaluminum should be dry, isolated from the air, and protected with nitrogen. Stirring is required to promote the reaction during the titration process of concentration determination. The standard titration solution used for concentration determination is the pyridine-xylene standard titration solution. Pyridine and xylene both have a strong pungent odor and are volatile. They are both low-toxic chemicals and can cause poisoning hazards to personnel. The device used to determine the concentration needs to be tested in a well-sealed and well-ventilated environment. Some test devices use filters to remove moisture from the test device to prevent the triisobutylaluminum system from contacting moisture, but this may cause insufficient nitrogen replacement in the system, and the remaining air will cause the test concentration to be low. Utility Model Content

[0003] The utility model aims to provide a device for measuring the concentration of triisobutylaluminum to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a device for measuring the concentration of triisobutylaluminum, comprising a magnetic stirrer, a triangular titration bottle is arranged on the top of the magnetic stirrer, a metering control mechanism is installed on the top of the triangular titration bottle, a liquid guide tube is connected to one side of the metering control mechanism, a titration solution reagent bottle is arranged at one end of the liquid guide tube, a nitrogen supply pipe is connected to the top of the titration solution reagent bottle, an exhaust pipe is connected to the middle of the nitrogen supply pipe, a high-purity nitrogen cylinder is arranged at one end of the exhaust pipe, a waste liquid pipe is connected to one side of the triangular titration bottle, a waste liquid collecting bottle is arranged at one end of the waste liquid pipe, a waste gas pipe is arranged on the other side of the triangular titration bottle, a waste gas collecting bottle is arranged at one end of the waste gas pipe, an end of the nitrogen supply pipe away from the titration solution reagent bottle is connected to the inside of the triangular titration bottle, and the metering control mechanism comprises a burette and a titration piston installed in the middle of the burette.

[0005] Preferably, a bracket is installed on the back of the magnetic stirrer, the top of the bracket is connected to the metering control mechanism, and the bracket is used for installing and fixing the metering control mechanism.

[0006] Preferably, the output end of the high-purity nitrogen cylinder is connected to the exhaust pipe, a second nitrogen control valve is provided at one end of the nitrogen supply pipe close to the titration solution reagent bottle, and a first nitrogen control valve is provided at one end of the nitrogen supply pipe close to the triangular titration bottle.

[0007] Preferably, the bottom of the liquid guide tube extends to the bottom of the inner wall of the titration solution reagent bottle, a standard solution control valve is provided at one end of the liquid guide tube close to the metering control mechanism, the liquid guide tube is connected to the inside of the burette of the metering control mechanism, a waste liquid control valve is provided in the middle of the waste liquid pipe, and a waste gas control valve is provided in the middle of the waste gas pipe.

[0008] Preferably, the bottom of the burette extends to the interior of the triangular titration bottle, the surface of the burette is provided with a scale, the top of the triangular titration bottle is installed with a rubber stopper, and the interior of the waste gas collection bottle is provided with liquid paraffin, which is used for liquid sealing inside the waste gas collection bottle.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] When replacing nitrogen, the nitrogen inside the high-purity nitrogen cylinder will enter the interior of the triangular titration bottle through the exhaust pipe and the nitrogen supply pipe, and the internal gas will be discharged through the waste gas pipe on one side of the triangular titration bottle, enter the interior of the waste gas collection bottle, and be discharged into the waste gas collection bottle for collection. During measurement, the nitrogen inside the high-purity nitrogen cylinder will enter the interior of the titration solution reagent bottle, and the pyridine-xylene standard titration solution inside the titration solution reagent bottle will be pressed out with nitrogen, and enter the interior of the burette of the metering control mechanism through the liquid guide tube. It can be added to the interior of the triangular titration bottle through the burette to complete the concentration titration, and the magnetic stirrer is started to stir the liquid inside the triangular titration bottle. The entire device for measuring the concentration of triisobutylaluminum is safer and more stable to use, and the use of nitrogen inert gas protection makes the catalyst activity stable, and the airtightness is good during use, avoiding the volatilization of toxic substances, pollution of the environment, and poisoning of personnel, and eliminating the need to use a filter to remove moisture, which can make the concentration test more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is the structural diagram of the metering control mechanism of the utility model;

[0013] Figure 3 It is the top structure diagram of the triangular titration bottle of the utility model.

[0014] In the figure: 1. magnetic stirrer; 2. triangular titration bottle; 3. titration solution reagent bottle; 4. waste liquid collection bottle; 5. high-purity nitrogen cylinder; 6. waste gas collection bottle; 7. metering control mechanism; 8. bracket; 9. nitrogen supply pipe; 10. exhaust pipe; 11. liquid guide tube; 12. waste liquid pipe; 13. waste gas pipe; 14. first nitrogen control valve; 15. second nitrogen control valve; 16. standard solution control valve; 17. waste liquid control valve; 18. waste gas control valve; 19. burette; 20. titration piston; 21. scale; 22. rubber stopper. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-3 The utility model provides a device for determining the concentration of triisobutylaluminum, comprising a magnetic stirrer 1, a triangular titration bottle 2 is arranged on the top of the magnetic stirrer 1, a metering control mechanism 7 is installed on the top of the triangular titration bottle 2, a liquid guide tube 11 is connected to one side of the metering control mechanism 7, a titration solution reagent bottle 3 is arranged at one end of the liquid guide tube 11, a nitrogen supply pipe 9 is connected to the top of the titration solution reagent bottle 3, an exhaust pipe 10 is connected to the middle of the nitrogen supply pipe 9, a high-purity nitrogen cylinder 5 is arranged at one end of the exhaust pipe 10, a waste liquid pipe 12 is connected to one side of the triangular titration bottle 2, a waste liquid collecting bottle 4 is arranged at one end of the waste liquid pipe 12, and a waste liquid collecting bottle 4 is arranged at one end of the triangular titration bottle 2. An exhaust pipe 13 is provided on the other side of the triangular titration bottle 2, and an exhaust gas collecting bottle 6 is provided at one end of the exhaust pipe 13. An end of the nitrogen supply pipe 9 away from the titration solution reagent bottle 3 is connected to the interior of the triangular titration bottle 2. The metering control mechanism 7 includes a burette 19 and a titration piston 20 installed in the middle of the burette 19. The bottom of the burette 19 extends to the interior of the triangular titration bottle 2. A scale 21 is provided on the surface of the burette 19. A rubber stopper 22 is installed on the top of the triangular titration bottle 2. Liquid paraffin is provided inside the exhaust gas collecting bottle 6. A bracket 8 is installed on the back of the magnetic stirrer 1, and the top of the bracket 8 is connected to the metering control mechanism 7.

[0017] In this embodiment, when replacing nitrogen, the nitrogen inside the high-purity nitrogen cylinder 5 will enter the interior of the triangular titration bottle 2 through the exhaust pipe 10 and the nitrogen supply pipe 9, and the gas inside the triangular titration bottle 2 will be discharged through the waste gas pipe 13 on one side of the triangular titration bottle 2 and enter the interior of the waste gas collecting bottle 6. When measuring, the nitrogen inside the high-purity nitrogen cylinder 5 will enter the interior of the titration solution reagent bottle 3, and the pyridine-xylene standard titration solution inside the titration solution reagent bottle 3 will be pressed out with nitrogen, and enter the interior of the burette 19 of the metering control mechanism 7 through the liquid guide tube 11, and it can be added to the interior of the triangular titration bottle 2 through the burette 19 to complete the concentration titration.

[0018] See also Figure 1-3 The output end of the high-purity nitrogen cylinder 5 is connected to the exhaust pipe 10, a second nitrogen control valve 15 is provided at one end of the nitrogen supply pipe 9 close to the titration solution reagent bottle 3, and a first nitrogen control valve 14 is provided at one end of the nitrogen supply pipe 9 close to the triangular titration bottle 2;

[0019] In this embodiment, by opening the first nitrogen control valve 14, the nitrogen in the high-purity nitrogen cylinder 5 can enter the interior of the triangular titration bottle 2 through one end of the nitrogen supply pipe 9, and the interior of the triangular titration bottle 2 is replaced with nitrogen. By opening the second nitrogen control valve 15, the nitrogen in the high-purity nitrogen cylinder 5 can enter the interior of the titration solution reagent bottle 3, and the solution in the titration solution reagent bottle 3 is pressed into the liquid guide tube 11, and finally enters the metering control mechanism 7.

[0020] See also Figure 1-3 The bottom of the liquid guiding tube 11 extends to the bottom of the inner wall of the titration solution reagent bottle 3. A standard solution control valve 16 is provided at one end of the liquid guiding tube 11 close to the metering control mechanism 7. The liquid guiding tube 11 is connected to the inside of the burette 19 of the metering control mechanism 7. A waste liquid control valve 17 is provided in the middle of the waste liquid pipe 12. A waste gas control valve 18 is provided in the middle of the waste gas pipe 13. The waste liquid control valve 17 and the waste liquid collecting bottle 4, the waste gas control valve 18 and the waste gas collecting bottle 6 are sealed.

[0021] When used specifically, the utility model is a device for determining the concentration of triisobutylaluminum. The solvent and standard titration solution used in the test are directly dehydrated in advance, eliminating the need to use a filter to remove moisture. The titration solution reagent bottle 3 is filled with a pyridine-xylene standard titration solution. When replacing nitrogen, the first nitrogen control valve 14 is opened, and the nitrogen in the high-purity nitrogen cylinder 5 enters the interior of the triangular titration bottle 2 through the exhaust pipe 10 and the nitrogen supply pipe 9. The gas in the triangular titration bottle 2 is discharged through the waste gas pipe 13 on one side of the triangular titration bottle 2, enters the interior of the waste gas collecting bottle 6, and is discharged into the waste gas collecting bottle 6 sealed with liquid paraffin for collection. When measuring, the second nitrogen control valve 15 is opened, and the nitrogen in the high-purity nitrogen cylinder 5 enters the interior of the titration solution reagent bottle 3, and the pyridine-xylene in the titration solution reagent bottle 3 is replaced. The standard titration solution is pressed out with nitrogen and enters the burette 19 of the metering control mechanism 7 through the liquid guide tube 11. The standard titration solution can be added to the inside of the triangular titration bottle 2 through the burette 19 to complete the concentration titration. The residual liquid in the triangular titration bottle 2 is discharged from the waste liquid pipe 12 into the waste liquid collection bottle 4. After the titration is completed, the magnetic stirrer 1 is started to stir the liquid in the triangular titration bottle 2. The magnetic son matched with the magnetic stirrer 1 is arranged in the triangular titration bottle 2 for stirring to promote the reaction of the liquid. The whole device for determining the concentration of triisobutylaluminum is safer and more stable to use. The use of nitrogen inert gas protection makes the catalyst activity stable, and the airtightness is good during use to avoid the volatilization of toxic substances, pollution of the environment, and poisoning of personnel. The use of filters to remove moisture is omitted, which can make the concentration test more accurate.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for measuring the concentration of triisobutylaluminum, comprising a magnetic stirrer (1), characterized in that: The top of the magnetic stirrer (1) is provided with a triangular titration bottle (2), the top of the triangular titration bottle (2) is equipped with a metering control mechanism (7), one side of the metering control mechanism (7) is connected to a liquid guide tube (11), one end of the liquid guide tube (11) is provided with a titration solution reagent bottle (3), the top of the titration solution reagent bottle (3) is connected to a nitrogen supply pipe (9), the middle of the nitrogen supply pipe (9) is connected to an exhaust pipe (10), one end of the exhaust pipe (10) is provided with a high-purity nitrogen cylinder (5), and the One side of the triangular titration bottle (2) is connected to a waste liquid pipe (12), one end of which is provided with a waste liquid collecting bottle (4); the other side of the triangular titration bottle (2) is provided with a waste gas pipe (13), one end of which is provided with a waste gas collecting bottle (6); one end of the nitrogen gas supply pipe (9) away from the titration solution reagent bottle (3) is connected to the interior of the triangular titration bottle (2); and the metering control mechanism (7) comprises a burette (19) and a titration piston (20) installed in the middle of the burette (19).

2. A device for measuring the concentration of triisobutylaluminum according to claim 1, characterized in that: A bracket (8) is installed on the back of the magnetic stirrer (1), and the top of the bracket (8) is connected to the metering control mechanism (7).

3. A device for measuring the concentration of triisobutylaluminum according to claim 1, characterized in that: The output end of the high-purity nitrogen cylinder (5) is connected to the exhaust pipe (10), the end of the nitrogen supply pipe (9) close to the titration solution reagent bottle (3) is provided with a second nitrogen control valve (15), and the end of the nitrogen supply pipe (9) close to the triangular titration bottle (2) is provided with a first nitrogen control valve (14).

4. The device for measuring the concentration of triisobutylaluminum according to claim 1, characterized in that: The bottom of the liquid guide tube (11) extends to the bottom of the inner wall of the titration solution reagent bottle (3); a standard solution control valve (16) is provided at one end of the liquid guide tube (11) close to the metering control mechanism (7); and the liquid guide tube (11) is in communication with the interior of the burette (19) of the metering control mechanism (7).

5. The device for measuring the concentration of triisobutylaluminum according to claim 1, characterized in that: A waste liquid control valve (17) is provided in the middle of the waste liquid pipe (12), and a waste gas control valve (18) is provided in the middle of the waste gas pipe (13).

6. The device for measuring the concentration of triisobutylaluminum according to claim 1, characterized in that: The bottom of the burette (19) extends to the interior of the triangular titration bottle (2), and a scale (21) is provided on the surface of the burette (19).

7. The device for measuring the concentration of triisobutylaluminum according to claim 1, characterized in that: A rubber stopper (22) is installed on the top of the triangular titration bottle (2), and liquid paraffin is provided inside the waste gas collecting bottle (6).

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