CN217527423U - Device for monitoring chemical reaction rate and reaction time - Google Patents

Abstract

The utility model discloses a device for monitoring chemical reaction rate and reaction time, comprising a test device and a computer. The test device includes a thermal insulation bin, an electromagnetic stirring device, a temperature sensor, a conductivity sensor and a sample bin; the thermal insulation bin is provided with a thermal insulation bin cover , the sample chamber and the electromagnetic stirring device are set in the insulation chamber, the sample chamber is placed on the electromagnetic stirring device, the stirring rotor of the electromagnetic stirring device is placed in the sample cell, the temperature sensor and the conductivity sensor are inserted into the sample cell through the sealing cover, and the temperature is recorded by the computer. Data from sensors and conductivity sensors. When in use, the reaction sample is placed in the sample cell, and then the electromagnetic stirring device is turned on and the temperature and conductivity change curve of the reaction sample during the chemical reaction process is automatically recorded on the computer. The present scheme has the advantages of simple structure, convenient use, portable experimental equipment and low cost, and can continuously and accurately monitor the rate, start and end time of the chemical reaction and the whole reaction process.

Description

A device for monitoring chemical reaction rate and reaction time

technical field

The utility model belongs to the field of testing devices for laboratory research, in particular to a device for monitoring chemical reaction rate and reaction time.

Background technique

A chemical reaction is a process in which molecules are broken into atoms, and the atoms are rearranged and combined to form new molecules. The reaction process is often accompanied by phenomena such as luminescence, heat generation, and changes in ion concentration. The chemical reaction rate is used to express the speed of the chemical reaction, which is usually related to the nature, concentration, temperature, pressure, catalyst, etc. of the reactants. The chemical reaction rate can be controlled by controlling the reaction conditions. Since the chemical reaction is usually accompanied by changes in heat and ion concentration, changes in heat and ion concentration often reflect the rate and extent of chemical reactions.

Studies have found that in chemical reactions involving changes in heat and ion concentration, changes in temperature and conductivity during the reaction can often be used to indicate the rate of the chemical reaction and the time at which the chemical reaction begins and ends. Whether the chemical reaction is carried out or not and the influence of different conditional factors on the degree of chemical reaction and reaction rate are of great significance in scientific research, and have a key guiding role in determining different parameter values and reaction conditions in chemical reactions. Therefore, it is particularly important to realize the continuous and accurate monitoring of the chemical reaction rate, start and end time and the whole process of the reaction in scientific research involving chemical reactions.

At present, in laboratory research, the occurrence and stop of chemical reactions are mainly judged by obvious reaction phenomena such as gas generation or precipitation, and color or state changes during the reaction process. Chemical reactions with insignificant phenomena cannot be monitored; and the methods of monitoring by instruments are often cumbersome, expensive, and applicable to a single type, and some are greatly affected by environmental factors, so simple and rapid monitoring cannot be achieved.

Utility model content

The utility model proposes a device for monitoring the chemical reaction rate and reaction time in order to solve the defects in the prior art, such as large judgment error and small scope of application, which exist in the prior art for judging the time and rate of chemical reaction by observing the reaction phenomenon.

The utility model is realized by adopting the following technical scheme: a device for monitoring chemical reaction rate and reaction time, comprising a test device and a computer, the test device is connected with the computer through a data cable; the test device comprises a thermal insulation bin, an electromagnetic stirring device and a temperature sensor, a conductivity sensor and a sample compartment; an insulation compartment cover is installed on the insulation compartment, the sample compartment and the electromagnetic stirring device are arranged in the insulation compartment, the sample compartment is placed on the electromagnetic stirring device, and a sample pool is arranged at the bottom of the sample compartment , the stirring rotor of the electromagnetic stirring device is placed in the sample cell;

The upper opening of the sample compartment is sealed by a sealing cover, the temperature sensor and the conductivity sensor are inserted into the sample cell through the sealing cover, and the data of the temperature sensor and the conductivity sensor are recorded by the computer.

Further, the thermal insulation bin is made of a material with a thermal conductivity less than 0.038w/(m·k), the wall thickness of the thermal insulation bin is not less than 10cm, and the thermal insulation bin and the thermal insulation bin cover constitute a sealed environment.

Further, the rotational speed of the electromagnetic stirring device is adjusted within the range of 100rpm to 1500rpm.

Further, the sample cell is made of glass, stainless steel, polyethylene or polytetrafluoroethylene.

Further, the outer side of the temperature sensor is wrapped by a transparent Teflon sleeve, which is resistant to acid, alkali, salt and organic corrosion, and the measurement temperature range is -200 to +260°C.

Further, the outer layer of the electrical conductivity sensor is wrapped by a transparent Teflon sleeve, and the measured electrical conductivity ranges from 0 to 99999 uS/cm.

Compared with the prior art, the advantages and positive effects of the present utility model are:

The device can quickly, continuously and accurately monitor the chemical reaction rate, start and end time, and the entire reaction process: the chemical reaction process is monitored by two factors: a temperature sensor and a conductivity sensor, and the entire monitoring process is completed in a closed adiabatic environment and is affected by the environment. Small; use computer for signal acquisition, continuously and automatically record the change curves of conductivity and temperature parameters in the chemical reaction process, and deduce the chemical reaction process; this experimental equipment is portable, low-cost, simple to operate, and has a wide range of applications, which can meet the needs of most Conventional laboratory chemical reaction research requirements, technical and economic benefits are obvious.

Description of drawings

1 is a schematic structural diagram of the device according to an embodiment of the present invention;

2 is a schematic diagram of the test results described in the use of the novel embodiment;

Among them: 1. Test device, 2. Computer, 3. Insulation compartment cover, 4. Data cable, 5. Temperature sensor, 6. Conductivity sensor, 7. Sample compartment, 8. Sample cell, 9. Stirring rotor, 10. Electromagnetic stirring device, 11, insulation compartment, 12, sealing cover.

Detailed ways

In order to be able to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific implementation disclosed below. example.

Considering that in a chemical reaction involving changes in heat and ion concentration, the temperature and conductivity changes during the reaction can be used to indicate the rate of the chemical reaction and the time when the chemical reaction starts and ends. The device for chemical reaction rate and reaction time realizes the rapid, simple, continuous and accurate monitoring of the chemical reaction rate, start and end time and the entire reaction process involving changes in temperature or ion concentration during the reaction process, as shown in Figure 1.

The device includes a test device 1 and a computer 2. The test device 1 is connected to the computer 2 through a data line 4. The test device 1 includes a thermal insulation chamber 11, an electromagnetic stirring device 10, a temperature sensor 5, a conductivity sensor 6 and a sample chamber 7. The insulation warehouse 11 is provided with the insulation warehouse cover 3, the sample warehouse 7 and the electromagnetic stirring device 10 are arranged in the insulation warehouse 11, the sample warehouse 7 is placed on the electromagnetic stirring device 10, and the sample tank 8 is provided at the bottom of the sample warehouse 7, The stirring rotor 9 of the electromagnetic stirring device 10 is placed in the sample cell 8; the upper opening of the sample chamber 7 is sealed by the sealing cover 12, the temperature sensor 5 and the conductivity sensor 6 are inserted into the sample cell 8 through the sealing cover 12, and the temperature sensor is recorded by the computer. 5 and conductivity sensor 6 data.

In this embodiment, the thermal insulation bin 11 is made of a material with a thermal conductivity less than 0.038w/(m·k), and the wall thickness of the thermal insulation bin 11 is not less than 10cm, and the thermal insulation bin 11 and the thermal insulation bin cover 12 form a sealed environment; The rotating speed of the electromagnetic stirring device 10 is adjusted within the range of 100-1500 rpm, and the electromagnetic stirring device 10 is used to drive the stirring rotor 9 to rotate. The chamber 11 is continuously and uniformly mixed; the temperature and conductivity values of the sample are continuously measured by the temperature sensor 5 and the conductivity sensor 6, and are transferred to the computer 2 via the data line 4 and recorded as a data curve, so as to realize the real-time observation and comparison of the data.

Wherein, the sample cell 8 is made of glass, stainless steel, polyethylene, polytetrafluoroethylene and other materials, which can be replaced according to different chemical reaction types. The outer layer of the temperature sensor 5 is made of transparent Teflon (polytetrafluoroethylene). The outer layer of the conductivity sensor 6 is wrapped by a transparent Teflon (polytetrafluoroethylene) sleeve, which is resistant to acid and alkali salts. And organic corrosion, the measured conductivity range is 0 ~ 99999uS/cm.

For specific operations, use the following methods:

1) first place the sample in the sample cell 8, place the stirring rotor 9, then place the sample cell 8 on the electromagnetic stirring device 10 at the bottom of the sample chamber 7, and tighten the sealing cover 12;

2) Extend the end of the temperature sensor 5 and the conductivity sensor 6 with the sensing point into the sample cell 8 through the sealing cover 12, the other end is connected with the data line 4, and the sensing points of the temperature sensor 5 and the conductivity sensor 6 are placed. Inside the reaction sample, after it is well sealed, tightly cover the insulation compartment cover 3;

3) After the computer 2 is connected to the data line 4, the electromagnetic stirring device 10 is turned on and the test software is started on the computer 2 to automatically record the temperature and conductivity change curves during the chemical reaction of the sample.

This scheme realizes the rapid and accurate monitoring of the chemical reaction process under different conditions by continuously stirring the reaction sample in a closed and adiabatic environment, and monitoring the changes of temperature and conductivity during the chemical reaction of the sample in real time. Reaction process monitoring and experimental conditions exploration in inorganic and other fields provide support for the optimization and selection of experimental conditions and parameters.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to change or remodel to equivalent changes. The equivalent embodiments are applied in other fields, but any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still belong to the technical solutions of the present utility model without departing from the technical solution content of the present utility model. scope of protection.

Claims (6)

1. A device for monitoring chemical reaction rate and reaction time, comprising a testing device (1) and a computer (2), the testing device (1) being connected to the computer (2) by a data line (4), characterized in that:

the testing device (1) comprises a heat preservation bin (11), an electromagnetic stirring device (10), a temperature sensor (5), a conductivity sensor (6) and a sample bin (7); a heat preservation bin cover (3) is arranged on the heat preservation bin (11), the sample bin (7) and the electromagnetic stirring device (10) are arranged in the heat preservation bin (11), the sample bin (7) is placed on the electromagnetic stirring device (10), a sample pool (8) is arranged at the bottom of the sample bin (7), and a stirring rotor (9) of the electromagnetic stirring device (10) is placed in the sample pool (8);

the upper opening of the sample bin (7) is sealed by a sealing cover (12), the temperature sensor (5) and the conductivity sensor (6) penetrate through the sealing cover (12) and are inserted into the sample pool (8), and data of the temperature sensor (5) and the conductivity sensor (6) are recorded by a computer.

2. The apparatus for monitoring chemical reaction rate and reaction time as claimed in claim 1, wherein: the heat-insulating bin (11) is made of a material with a heat conductivity coefficient of less than 0.038 w/(m.k), the wall thickness of the heat-insulating bin is not less than 10cm, and the heat-insulating bin (11) and the heat-insulating bin cover (3) form a sealed environment.

3. An apparatus for monitoring chemical reaction rates and reaction times as defined in claim 1, wherein: the rotating speed of the electromagnetic stirring device (10) is adjusted within the range of 100 rpm-1500 rpm.

4. An apparatus for monitoring chemical reaction rates and reaction times as defined in claim 1, wherein: the sample cell (8) is made of glass, stainless steel, polyethylene or polytetrafluoroethylene.

5. An apparatus for monitoring chemical reaction rates and reaction times as defined in claim 1, wherein: the outer side of the temperature sensor (5) is wrapped by a transparent Teflon sleeve, and is resistant to acid, alkali and organic corrosion, and the measurement temperature range is-200 to +260 ℃.

6. An apparatus for monitoring chemical reaction rates and reaction times as defined in claim 1, wherein: the outer layer of the conductivity sensor (6) is wrapped by a transparent Teflon sleeve, and the measured conductivity range is 0-99999 uS/cm.

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