Large Conical Flask

The large conical flask is a glass container commonly found in chemistry laboratories and was invented by the German chemist Richard Erlenmeyer in 1861. Its profile is triangular, small mouth, large bottom, narrow bottom, suitable for oscillation, reflux and heating operations. The capacity of some modern conical bottles usually ranges from 50 ml to 5000 ml, and some industrial models can reach 20 liters, which are widely used in the chemical, biological, pharmaceutical and food industries.
Due to its structural advantages, temperature resistance and versatility, the flask has become a standard equipment for laboratory and industrial production. Through reasonable selection and standardized operation, the experimental efficiency and safety can be significantly improved. In the future, with the development of material science and automation technology, it will play a greater role in green chemistry, intelligent laboratories and other fields.

When using a large conical flask, the following points need to be noted to ensure the safety and accuracy of the experiment:

Capacity limit: The amount of liquid injected should not exceed 2/3 of the volume of the conical bottle, especially when heating operations are carried out to prevent the liquid from overheating and expanding and splashing. Although large conical bottles have large capacity, they also need to comply with this principle.

Heating operation:

When heating, asbestos mesh or special heating pad should be used to avoid direct contact with the heat source of the conical bottle resulting in rupture.

The heating process should be evenly heated to avoid local overheating.

Before heating, ensure that the outside of the conical bottle is dry to prevent cracking caused by over-cooling.

Stirring and oscillating:

When mixing, the glass rod of the appropriate length should be used to avoid the mixing rod touching the conical wall or the bottom of the bottle resulting in cracking.

When oscillating the conical bottle, it should be rotated in the same direction to avoid liquid splashing.

Cleaning and drying:

After use, the conical bottle should be cleaned immediately to avoid the residue is difficult to remove after drying.

Special detergent can be used for cleaning, and ultrasonic cleaners can be used for cleaning if necessary.

After cleaning, the conical bottle should be thoroughly dried to prevent internal residual moisture from affecting the experimental results.

Storage and protection:

Conical bottles should be stored in a dry, cool, ventilated place, away from direct sunlight and high temperature environment.

Avoid the conical bottle being hit or squeezed to avoid cracking.

Use special stoppers: Make sure to use a cork or rubber stopper that matches the conical mouth of the bottle to prevent leaks.

Avoid chemical corrosion: Pay attention to the material of the conical bottle and the range of chemical substances tolerated, and avoid the use of chemical reagents that will corrod the conical bottle.

Marking and identification: Conical bottles containing different reagents should be clearly marked to prevent confusion.

Follow laboratory safety procedures: When using large conical bottles, always follow laboratory safety procedures and operating procedures to ensure personal safety and cleanliness of the laboratory environment.

By following these precautions, it is possible to ensure that large conical bottles perform optimally in chemical experiments while ensuring the safety of the experimenter.

In the process of using large conical flasks, in order to avoid potential risks and ensure the accuracy of the experiment, special attention should be paid to avoid the following points:

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 Avoid violent oscillations or sudden shaking: Violent oscillations may cause the solution in the bottle to overflow or the conical bottle to break. During operation, the conical bottle should be moved steadily and slowly to avoid excessive impact force.

 Avoid direct contact with bottle necks: Direct hand contact with bottle necks may increase the risk of contamination and cross infection. During operation, appropriate tools (such as tweezers, gloves, etc.) should be used to avoid direct contact with the bottle opening.

 Avoid overfilling: As mentioned earlier, the amount of liquid injected should not exceed 2/3 of the volume of the conical bottle (some say 1/2) to prevent liquid overflow during heating or oscillation.

 Avoid direct heating: Conical bottles should not be heated directly on the flame, but should use indirect heating methods such as asbestos mesh or magnetic stirrer. Direct heating may cause the conical bottle to be unevenly heated and crack.

 Avoid using improper cleaners and utensils: When cleaning conical bottles, use special cleaners and utensils and avoid using cleaners that may corrode or damage conical bottles. At the same time, the cleaning process should be carefully operated to avoid collision or damage to the bottle mouth.

 Avoid long-term exposure to corrosive environment: Conical bottles exposed to corrosive environment for a long time may cause damage to their material, which will affect their performance and safety. Therefore, during use and storage, direct contact between conical bottles and corrosive substances should be avoided as far as possible.

 Avoid improper storage: Conical bottles should be stored in a dry, light and clean environment, avoid exposure to sunlight or wet environment. Improper storage may cause deformation, cracking or contamination of the conical bottle.

 Avoid violent reactions with conical bottles: While conical bottles can be used for a variety of heating and reaction tasks, reactions that are too violent in them should be avoided to prevent the conical bottle from cracking or solution spillage.

Chemical reaction vessel

Main uses: Large conical bottle can also be used as a chemical reaction container for various chemical reactions, such as acid-base neutralization reaction, REDOX reaction and so on. These reactions are usually carried out at a certain temperature and pressure, and the conical bottle can provide a stable reaction environment.

Operation details: When choosing a conical bottle as a reaction vessel, the appropriate conical bottle material and specification should be selected according to the reaction type and the nature of the reactants. At the same time, the conical bottle should be shaken regularly during the reaction process to promote the reaction, and pay attention to controlling the reaction conditions and monitoring the reaction process.

Solution preparation and dilution

Main use: In quantitative analysis, sometimes it is necessary to prepare a certain volume and concentration of solutions. Large conical bottles can be used for this purpose to prepare the desired concentration of solution by accurately weighing the solute and adding the right amount of solvent. In addition, conical bottles can also be used for solution dilution operations.

Operation details: When preparing the solution, ensure that the conical bottle is clean and dry, and use an accurate weighing tool to weigh the solute. When diluting the solution, the desired volume of the concentrated solution and solvent should be accurately measured and thoroughly mixed in the conical bottle.

Gas collection and storage

Main Use: In some quantitative analyses, it may be necessary to collect the resulting gas. The large conical bottle acts as a gas collection vessel into which the generated gas is directed through a conduit. At the same time, conical bottles can also be used to store a certain amount of gas for subsequent analysis.

Operation details: When collecting gas, it should be ensured that the sealing of the conical bottle is good to prevent gas leakage. At the same time, when storing gas, attention should be paid to controlling temperature and pressure conditions to ensure the stability of the gas.

Precipitation reaction and filtration operation

Main Use: In some quantitative analyses, a precipitation reaction may be required to separate and enrich the target substance. Large conical bottles can be used for this purpose by adding an appropriate precipitating agent to precipitate the target substance. In addition, conical bottles can be used for subsequent filtration operations to separate sediments and solutions.

Operation details: In the precipitation reaction, the appropriate reaction conditions should be determined according to the nature of the target substance and the choice of precipitating agent. In filtration operations, appropriate filtration equipment and operating methods should be used to ensure complete separation of sediment and clarification of the solution.

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