Liquid mixing reactor

Abstract

The utility model relates to a liquid mixing reactor which is suitable for a chemical reaction that two liquid reactants are mixed after independent temperature control. The reaction device comprises a cylindrical main body test tube and a bent branch test tube, the 1 / 2 height part of the main body test tube is communicated with the branch test tube, an included angle is formed between the main body test tube and the branch test tube, the main body test tube and the branch test tube are respectively provided with openings for adding and taking reactants, and the opening of the main body test tube is higher than the opening of the branch test tube. The distance between the opening and the bottom of the main body test tube is larger than the distance between the opening and the bottom of the branch test tube by three times. The device can be used for the chemical reaction that two liquid reactants are mixed after independent temperature control in the chemical reaction, can effectively ensure that the reactants in the branch test tubes are completely transferred and fully mixed with the reactants in the main test tube through one-time inclination of the reactor, and avoids the situation that the accuracy of an experimental result is influenced by waste of time due to multiple-time inclination and mixing.

Description

Technical Field

[0001] This utility model relates to a liquid mixing reactor, specifically an integrated reactor that rapidly and uniformly mixes two groups of liquid reactants after independent temperature control, belonging to chemical experimental instruments. Background Technology

[0002] "Determination of Chemical Reaction Rate and Activation Energy" is a classic chemistry experiment commonly offered in Chinese universities. This experiment focuses on the reaction between ammonium persulfate solution and potassium iodide solution. Determining the reaction rate and activation energy requires heating or cooling the two liquid reactants separately to specific temperatures before mixing them and allowing the reaction to proceed. The reaction time is recorded, and the reaction rate and activation energy are calculated based on the experimental data. The traditional procedure typically includes: ① placing the two liquid reactants in separate containers (e.g., beakers); ② placing the containers containing the reactants in a warm bath (e.g., hot or cold water) to heat or cool to the required experimental temperature and maintaining this temperature for a certain time; ③ pouring the reaction solution (e.g., ammonium persulfate solution) from one container into the other (e.g., potassium iodide + indicator solution) and mixing before continuing the reaction. In teaching experiments, with a large number of students, the use of multiple containers for temperature control requires significant space and multiple constant-temperature water baths, placing immense pressure on laboratory space and the availability of such equipment. The integration and miniaturization of reaction containers can solve the problems of cramped laboratory space and high equipment costs. Since the rate of a chemical reaction is closely related to the initial concentration of the reactants, complete and uniform mixing of the two solutions in the shortest possible time is a prerequisite for accurate determination of the reaction rate. Existing patent (CN221310716U) describes a mixing test tube with two adjacent tubes connected at the top. This allows for temperature control and mixing of two liquids within the same reactor with minimal space required for temperature control. However, if this test tube is used in the aforementioned teaching experiment to determine the chemical reaction rate, the space above the connecting tube means that when the test tube is quickly tilted to mix the liquids, the liquid flowing out from the bottom of the test tube is easily blocked by the right-angle bend in the connecting tube, causing some liquid to flow into the space above the test tube. This liquid retention causes a deviation between the material ratio of the mixed reaction solution and the experimental design, affecting the accuracy of the experimental results. In this case, the test tube needs to be tilted (or inverted) again to allow the retained liquid to flow back into the mixed solution to obtain the predetermined ratio. The time wasted by tilting the test tube again results in the concentration of the transferred reactants in the early stages of the reaction being lower than the experimentally preset concentration, prolonging the experimental time and significantly affecting the accuracy of the experimental determination. In response to the above problems and the specific circumstances of the aforementioned experiments, this utility model provides a liquid mixing reactor. This reactor not only meets the experimental requirement of independent temperature control for two groups of liquid reactants in the same reactor, but also ensures that there is no liquid stagnation when the two groups of liquids are mixed rapidly, and that the mixing of reactants is fast and uniform, thus ensuring the accuracy of experimental results. Utility Model Content

[0003] The purpose of this invention is to provide a liquid mixing reactor that allows two groups of liquid reactants to be independently heated or cooled to the required temperature before mixing, and that there is no liquid retention during rapid mixing, achieving rapid and uniform mixing of different reactants and ensuring the accuracy of experimental results.

[0004] A liquid mixing reactor includes a cylindrical main test tube and a curved branch test tube. The main test tube and the branch test tube are connected. The top of the main test tube and the outer side of the curved part of the branch test tube are respectively provided with openings for adding reactants. The openings are provided with sealing fittings. The distance between the opening and the bottom of the main test tube is more than three times the distance between the opening and the bottom of the branch test tube. The branch test tube is connected to the main test tube at 1 / 2 height, and the two tubes at the connection point form a certain angle.

[0005] Furthermore, the included angle between the main test tube and the branch test tube at the connection point of the reactor is in the range of 30-60 degrees.

[0006] Furthermore, the bending angle of the curved branch tubes of the reactor is in the range of 120-150 degrees.

[0007] Furthermore, the opening of the main test tube of the reactor is more than 5 centimeters higher than the opening of the branch test tubes.

[0008] Furthermore, the main test tube and the branch test tubes of the reactor have the same inner diameter.

[0009] Furthermore, the sealing fittings for the main test tube and branch test tubes of the reactor are rubber stoppers or screw caps.

[0010] Furthermore, the bottom of the main test tube and the bottom of the branch test tubes of the reactor are flat or convex.

[0011] Furthermore, the reactor is made of glass or quartz.

[0012] The beneficial effects of this invention are as follows: When used in the experiment of "determination of chemical reaction rate and activation energy", the main test tube and the branch test tube in the reactor are used to hold a larger volume of potassium iodide + indicator solution and a smaller volume of ammonium persulfate solution, respectively, and are independently heated or cooled to the predetermined temperature in a warm bath. The curved branch test tube lacks space to accumulate reaction liquid. When the reactor is tilted, because the vertical section of the branch test tube is shorter, the ammonium persulfate solution inside will flow rapidly into the main test tube along the inner wall of the inclined part of the branch test tube near the main test tube. The liquid will not stagnate at the opening of the branch test tube outside the bend. At the same time, the potassium iodide + indicator solution flows horizontally from the bottom of the main test tube to the opening at a greater distance. The synchronous flow of the two sets of solutions helps to mix the reactants more thoroughly. Meanwhile, since the main test tube has a volume more than three times that of the space between the opening and bottom of the branch test tubes, the large space ensures that the two solutions occupy only a small proportion of the main test tube's space after mixing. During the subsequent restoration of the reactor to a vertical position, the mixed solution flows to the bottom of the main test tube, achieving secondary mixing. Only one tilt is needed to complete the thorough and uniform mixing of the solution, with a short total time (within 3 seconds). This overcomes the shortcomings of existing "H"-shaped mixing test tubes, which are prone to liquid retention and have long mixing times. This new reactor has advantages such as simple structure and low cost. Only a 500 mL beaker containing a water bath is needed to control the temperature of the reactants, making it suitable for widespread application in experimental teaching with large numbers of participants and limited budgets. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the liquid mixing reactor in Embodiment 1 of this utility model;

[0014] Figure 2 This is a schematic diagram of the liquid mixing reactor operation process in Embodiment 1 of this utility model;

[0015] In the diagram: 1. Main test tube; 11. Rubber stopper; 12. Bottom of main test tube; 2. Branch test tube; 21. Screw cap; 22. Bottom of branch test tube. Items 11 and 21 are sealing fittings. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments. Example

[0017] See Figure 1The liquid mixing reactor includes a main test tube 1 and a branch test tube 2. The main test tube 1 is basically cylindrical, with an opening at one end and a closed bottom 12 at the other. The distance between the opening and the bottom 12 is 200 mm. The inner diameter of the tube is 16 mm, and the wall thickness is 2 mm. The opening is sealed with a rubber stopper 11. The bottom 12 is flat. A bent branch test tube 2 is connected to one side of the tube wall at half the height of the main test tube 1. The angle between the two tubes at the connection point of the main test tube 1 and the branch test tube 2 is 60 degrees. The distance between the bottom 12 and the opening of the main test tube and the outer wall of the connected branch test tube is 90 mm. The branch test tube 2 is basically cylindrical with a 120-degree bend. The inner diameter of the tube is 16 mm, and the wall thickness is 2 mm. The opening of the branch test tube 2 is located on the outside of the bend. The matching sealing accessory is a screw cap 21. The bottom 22 of the branch test tube is flat, and the distance between the bottom 22 of the branch test tube and the center of the opening is 60 mm. When using, fix the reactor vertically with the opening facing upward. Add 6 ml of potassium iodide + indicator solution to the bottom 11 of the main test tube from the opening of the main test tube 1. Add 4 ml of ammonium persulfate solution to the bottom 22 of the branch test tube from the opening of the branch test tube 2. Place the reactor in a 500 ml beaker containing hot water or ice water to heat or cool to the required temperature. Tilt the reactor so that the main test tube 1 is horizontal. The ammonium persulfate solution in the branch test tube 2 flows quickly into the main test tube 1. After all the solution has flowed out, quickly straighten the reactor again, mix the solutions again, and put it back into the warm bath beaker to continue the reaction and measure the data. It is suitable for the experiment of "determination of chemical reaction rate and activation energy".

[0018] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. A liquid mixing reactor, comprising a cylindrical main test tube (1) and a curved branch test tube (2), the main test tube (1) and the branch test tube (2) being connected, wherein the top of the main test tube (1) and the outer side of the curved corner of the branch test tube (2) are respectively provided with openings for adding reactants, and the openings are provided with sealing fittings, characterized in that: The distance between the opening and bottom (12) of the main test tube is greater than 3 times the distance between the opening and bottom (22) of the branch test tube. The branch test tube (2) is connected to the main test tube (1) at 1 / 2 height, and the two tubes at the connection point form a certain angle.

2. The liquid mixing reactor as described in claim 1, characterized in that: The angle between the two tubes at the connection point of the main test tube (1) and the branch test tube (2) is between 30 and 60 degrees.

3. The liquid mixing reactor as described in claim 1, characterized in that: The bending angle of the curved branch test tube (2) is in the range of 120-150 degrees.

4. The liquid mixing reactor as described in claim 1, characterized in that: The opening of the main test tube is more than 5 centimeters higher than the opening of the branch test tube.

5. The liquid mixing reactor as described in claim 1, characterized in that: The main test tube (1) and the branch test tube (2) have the same inner diameter.

6. The liquid mixing reactor as described in claim 1, characterized in that: The sealing fittings for the main test tube (1) and the branch test tube (2) are rubber stoppers (11) or screw caps (21).

7. The liquid mixing reactor according to any one of claims 1-6, characterized in that: The bottom of the main test tube (12) and the bottom of the branch test tube (22) are flat or convex.

8. The liquid mixing reactor according to any one of claims 1-6, characterized in that: The reactor is made of glass or quartz.

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