Green integrated experimental research apparatus

Abstract

The utility model relates to the technical field of chemical experiments, and discloses a green integrated experimental research instrument which comprises a plastic bottle, a bottle cap is in threaded connection with a bottle opening of the plastic bottle, a first injector is arranged on the left side of the upper end of the bottle cap, and a second injector is arranged on the right side of the upper end of the bottle cap. A first communicating pipe is fixedly connected to the middle of the upper end of the bottle cap, a first connecting piece is arranged at the bottom end of the first communicating pipe, and the bottom of the first connecting piece communicates with four second communicating pipes. According to the utility model, greenization, integration and miniaturization can be realized. The device can complete SO2 preparation, SO2 oxidability, reducibility, bleaching property, water solubility and other experiments at a time in a closed environment, the number of used medicines in the experiments is small, a series of SO2 property experiments can be completed by using a small amount of medicines, the miniaturized experiment concept is embodied, and meanwhile, a comparison experiment of SO2 and a BaCl2 solution is added in the experiment.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical experiments, in particular to a green integrated experimental research device. Background Art

[0002] Sulfur is one of the typical non-metallic elements, and sulfuric acid is a representative, strongly oxidizing, monobasic inorganic strong acid learned in high school. The preparation and properties teaching experiment of SO2 and the conversion of sulfur-containing substances with different valence states are listed as one of the compulsory experiments for students; the laboratory preparation of SO2 is a typical reaction between solid and liquid, and its reaction device can also be used for the reaction of other common solids and liquids. It can be seen that the preparation and property exploration of SO2 occupies an important position in middle school chemistry experiments.

[0003] However, during the preparation and chemical property analysis of SO2, toxic gases will be produced, polluting the environment. Improper operation will harm the health of teachers and students. At the same time, most existing chemical experimental instruments are inconvenient to install, complicated to operate, and cannot immediately handle harmful exhaust gases, and will waste a large amount of chemical experimental drugs. It is necessary to design a green integrated experimental research equipment to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a green integrated experimental research equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A green integrated experimental research device, comprising a plastic bottle, a bottle cap being threadedly connected to the bottle mouth of the plastic bottle, a first syringe being provided on the left side of the upper end of the bottle cap, a second syringe being provided on the right side of the upper end of the bottle cap, a first connecting tube being fixedly connected to the middle portion of the upper end of the bottle cap, a first connecting piece being provided at the bottom end of the first connecting tube, four second connecting tubes being connected to the bottom end of the first connecting piece, a second connecting piece being provided at the bottom end of each of the second connecting tubes, a third syringe, a fourth syringe, a fifth syringe, and a sixth syringe being fixedly connected to the second connecting piece in order from left to right;

[0007] The above technical solution achieves green, integrated, and miniaturized design. The device can complete SO2 preparation, SO2 oxidizing, reducing, bleaching, and water-solubility experiments all in a single step within a sealed environment. The experiments use minimal chemicals, allowing a series of SO2 property experiments to be completed with trace amounts, embodying the concept of miniaturized experiments. Furthermore, the experiment includes a comparative experiment between SO2 and BaCl2 solutions, resolving the common misconception among students that SO2 can cause BaCl2 solutions to become turbid.

[0008] Furthermore, flow regulators are provided on the outer sides of the four second connecting pipes;

[0009] The above technical solution makes it easy to adjust the SO2 inflow rate and increases the convenience of closing and opening.

[0010] Furthermore, the first syringe and the second syringe are both provided with needles, and the third syringe, the fourth syringe, the fifth syringe and the sixth syringe are not provided with needles;

[0011] Through the above technical solution, the first syringe and the second syringe with needles are easy to pierce the bottle cap and can stand on the upper part of the plastic bottle. The third syringe, the fourth syringe, the fifth syringe and the sixth syringe without needles can increase the SO2 inflow rate and can be connected to the installation.

[0012] Furthermore, the interior of the plastic bottle is filled with Na2SO3 solid, the interior of the first syringe is provided with H2SO4 (concentrated), and the interior of the second syringe is provided with NaOH;

[0013] Through the above technical solution, Na2SO3 solid reacts with H2SO4 to produce SO2, and NaOH reacts with SO2 to treat toxic tail gas.

[0014] Furthermore, the first syringe and the second syringe each have a capacity of 10 ml, and the third syringe, the fourth syringe, the fifth syringe and the sixth syringe each have a capacity of 5 ml;

[0015] The above technical solution can prevent waste caused by excessive absorption of chemical agents at one time.

[0016] Furthermore, the third syringe is provided with an acidic KMnO4 solution, the fourth syringe is provided with a Na2S solution, the fifth syringe is provided with a purple litmus solution, and the sixth syringe is provided with a fuchsin solution;

[0017] The above technical solution makes it easy to observe the chemical reaction changes of SO2 with acidic KMnO4 solution, Na2S solution, purple litmus solution and fuchsin solution respectively.

[0018] The utility model has the following beneficial effects:

[0019] 1. In the present invention, the experimental device can be green, integrated, and miniaturized. The device can complete SO2 preparation, SO2 oxidizing properties, reducing properties, bleaching properties, water solubility and other experiments in a closed environment at one time. The experiment uses few chemicals, and a series of SO2 property experiments can be completed with a trace amount of chemicals, reflecting the concept of miniaturization. At the same time, the experiment adds a comparative experiment of SO2 and BaCl2 solution, which solves the myth that students always think that SO2 can make BaCl2 solution turbid during the learning process. The experiment is highly controllable. By adjusting the flow regulator, not only can multiple property experiments be selected to be carried out simultaneously, but also a single property can be experimented step by step. It is suitable for demonstration in classroom teaching or student group experiments, giving students more time to think and facilitate students to observe experimental phenomena.

[0020] 2. In the present invention, experimental equipment is easy to obtain and easy to operate. The experimental device uses discarded plastic bottles and a self-made first connecting tube and second connecting tube, which can be integrated with one fork, integrated with two forks, etc. The split state can be selected at any time according to the experiment, embodying a "power bank-style" reaction device that can be used at any time to ensure that toxic gases do not leak; the syringe is cleverly used as a reaction container for the SO2 property experiment, and there is no need to add an additional air pressure buffer device. According to the change in pressure, the core rod of the syringe automatically moves back and forth to balance the pressure.

[0021] 3. In the utility model, zero emission of toxic tail gas can be achieved. During the experimental exploration of the properties of SO2, the entire device is sealed. After the experiment, NaOH solution is injected into the plastic bottle. At the end of the experiment, all the reagents in the small syringe can be pushed into the mineral water bottle to completely absorb the residual SO2 gas, achieving zero emission of SO2 tail gas, which is beneficial to the health of teachers and students and embodies the green concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front-side stereoscopic result diagram of a green integrated experimental research equipment proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the first connecting pipe, the first connecting piece, the second connecting pipe and the second connecting piece of the green integrated experimental research equipment proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the rear three-dimensional structure of a green integrated experimental research equipment proposed by the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the second connecting piece of a green integrated experimental research equipment proposed by the present invention.

[0026] Legend:

[0027] 1. Plastic bottle; 2. Bottle cap; 3. First syringe; 4. Second syringe; 5. First connecting tube; 6. First connecting piece; 7. Second connecting tube; 8. Second connecting piece; 9. Third syringe; 10. Fourth syringe; 11. Fifth syringe; 12. Sixth syringe; 13. Flow regulator. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Reference Figure 1-4 The utility model provides an embodiment: a green integrated experimental research equipment, including a plastic bottle 1, a bottle cap 2 is threadedly connected to the bottle mouth of the plastic bottle 1, a first syringe 3 is provided on the left side of the upper end of the bottle cap 2, a second syringe 4 is provided on the right side of the upper end of the bottle cap 2, a first connecting pipe 5 is fixedly connected to the middle part of the upper end of the bottle cap 2, a first connecting piece 6 is provided at the bottom end of the first connecting pipe 5, four second connecting pipes 7 are connected to the bottom of the first connecting piece 6, and a second connecting piece 8 is provided at the bottom end of each of the second connecting pipes 7. The second connecting piece 8 is fixedly connected to the third syringe 9, the fourth syringe 10, the fifth syringe 11 and the sixth syringe 12 from left to right in sequence.

[0030] The outer sides of the four second connecting tubes 7 are each provided with a flow regulator 13, which is convenient for adjusting the SO2 inflow rate and can increase the convenience of closing and opening. The first syringe 3 and the second syringe 4 are both provided with needles, and the third syringe 9, the fourth syringe 10, the fifth syringe 11 and the sixth syringe 12 are all provided with no needles. The first syringe 3 and the second syringe 4 with needles are convenient for piercing the bottle cap 2 and can stand on the upper part of the plastic bottle 1. The third syringe 9, the fourth syringe 10, the fifth syringe 11 and the sixth syringe 12 without needles can increase the SO2 inflow rate and can be connected to the installation. The interior of the plastic bottle 1 is filled with Na2SO3 solid, the interior of the first syringe 3 is provided with H2SO4 (concentrated), the interior of the second syringe 4 is provided with NaOH is placed, and Na2SO3 solid reacts with concentrated H2SO4 to produce SO2. NaOH reacts with SO2 to treat the toxic tail gas. The first syringe 3 and the second syringe 4 both use a capacity of 10ml, and the third syringe 9, the fourth syringe 10, the fifth syringe 11 and the sixth syringe 12 all use a capacity of 5ml to prevent waste caused by excessive absorption of chemicals at one time. The interior of the third syringe 9 is provided with an acidic KMnO4 solution, the interior of the fourth syringe 10 is provided with a Na2S solution, the interior of the fifth syringe 11 is provided with a purple litmus solution, and the interior of the sixth syringe 12 is provided with a fuchsin solution, which is convenient for observing the chemical reaction changes of SO2 with the acidic KMnO4 solution, Na2S solution, purple litmus solution and fuchsin solution respectively.

[0031] Working principle: First, connect the first syringe 3 and the second syringe 4 to the plastic bottle 1. Use a hot melt glue gun to drip hot melt glue around the syringe needles to fix the first syringe 3 and the second syringe 4 to ensure the airtightness of the device. Then assemble the first connecting pipe 5, the first connecting piece 6, the second connecting pipe 7 and the second connecting piece 8, and connect the third syringe 9, the fourth syringe 10, the fifth syringe 11 and the sixth syringe 12 from left to right at the second connecting piece 8. Then push the flow regulator 13 upwards, open all the flow regulators 13, squeeze the mineral water bottle with your hand, and the syringe pistons move outwards at the same time. Release your hand and the pistons return to their original position, which proves that the airtightness of the device is good. Further add an appropriate amount of Na2SO3 solid to the plastic bottle 1, and slowly push the first syringe 13 upwards. The core rod of the injector 3 is used to slowly drip the concentrated sulfuric acid in the first syringe 3 into the mineral water bottle. The concentrated sulfuric acid reacts with the Na2SO3 solid to generate SO2 gas. The SO2 enters the third syringe 9, the fourth syringe 10, the fifth syringe 11 and the sixth syringe 12 along the first connecting tube 5 and the second connecting tube 7. The flow regulator 13 is opened respectively to observe the phenomenon in the liquid of the third syringe 9, the fourth syringe 10, the fifth syringe 11 and the sixth syringe 12. After all the reactions are completed, the flow regulators of each branch are closed, the needle tube of the syringe is unplugged, the syringe filled with the fuchsin solution is placed in the prepared hot water bath, the phenomenon in the syringe is observed, and finally the second syringe 4 is pushed to push the NaOH solution into the mineral water bottle to absorb SO2 and treat the tail gas.

[0032] Example 2:

[0033] This embodiment is a green integrated experimental research equipment for sulfur dioxide generation chemical reaction:

[0034] Preparation of SO2: Na2SO3+H2SO 4( concentrated) ===Na2SO4+SO2↑+H2O.

[0035] The oxidizing property of SO2: 3SO2+2NaS=3S↓+2Na2SO3.

[0036] Reducibility of SO2: SO2+I2+2H2O=H2SO4+2HI;

[0037] 5SO2+2MnO4 - +2H2O=5SO4 2- +2Mn 2+ +4H + ;

[0038] BaCl2+SO2+H2O2=BaSO4+2HCl.

[0039] Bleaching property of SO2: It can fade the color of fuchsin solution, but restore its original color upon heating.

[0040] SO2 is an acidic oxide: it can turn purple litmus solution red; SO2+H2O=H2SO3.

[0041] Conclusion: SO2 can decolorize acidic KMnO4 solutions and iodine solutions, demonstrating its reducing properties. SO2 can make Na2S solutions turbid, and a pale yellow precipitate appears in the syringe after a period of time, demonstrating its oxidizing properties. SO2 can turn litmus solutions red, indicating that SO2 does not simply dissolve in water but undergoes a chemical reaction with water, demonstrating that aqueous SO2 solutions are acidic. SO2 can decolorize fuchsin solutions, which then turn red upon heating, demonstrating its bleaching properties. SO2 cannot make BaCl2 solutions turbid, but BaCl2 solutions with H2O2 do become turbid, indicating that sulfurous acid is weaker than hydrochloric acid, demonstrating its reducing properties. Compare some of the phenomena before and after the experiment.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A green integrated experimental research equipment, comprising a plastic bottle (1), characterized in that: The bottle mouth of the plastic bottle (1) is threadedly connected to a bottle cap (2); a first syringe (3) is provided on the left side of the upper end of the bottle cap (2); a second syringe (4) is provided on the right side of the upper end of the bottle cap (2); a first connecting pipe (5) is fixedly connected to the middle of the upper end of the bottle cap (2); a first connecting piece (6) is provided at the bottom end of the first connecting pipe (5); four second connecting pipes (7) are connected to the bottom of the first connecting piece (6); a second connecting piece (8) is provided at the bottom end of each of the second connecting pipes (7); and the second connecting piece (8) is fixedly connected to a third syringe (9), a fourth syringe (10), a fifth syringe (11) and a sixth syringe (12) in sequence from left to right.

2. The green integrated experimental research equipment according to claim 1, characterized in that: A flow regulator (13) is provided on the outside of each of the four second connecting pipes (7).

3. The green integrated experimental research equipment according to claim 1, characterized in that: The first syringe (3) and the second syringe (4) are both provided with needles, while the third syringe (9), the fourth syringe (10), the fifth syringe (11) and the sixth syringe (12) are not provided with needles.

4. The green integrated experimental research equipment according to claim 1, characterized in that: The plastic bottle (1) is filled with solid Na2SO3, the first syringe (3) is filled with H2SO4 (concentrated), and the second syringe (4) is filled with NaOH.

5. The green integrated experimental research equipment according to claim 1, characterized in that: The first syringe (3) and the second syringe (4) both have a capacity of 10 ml, and the third syringe (9), the fourth syringe (10), the fifth syringe (11) and the sixth syringe (12) all have a capacity of 5 ml.

6. The green integrated experimental research equipment according to claim 1, characterized in that: The third syringe (9) is provided with an acidic KMnO4 solution, the fourth syringe (10) is provided with a Na2S solution, the fifth syringe (11) is provided with a purple litmus solution, and the sixth syringe (12) is provided with a fuchsine solution.

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