Quartz four necked flasks are commonly used in high-temperature and acid resistant environments, such as acid gas combustion, cooling devices or ventilation equipment, as well as experimental scenarios such as acid solution evaporation and distilled water preparation. Widely used in scientific research and experiments in the fields of chemistry, biology, medicine, etc., it is commonly used in organic synthesis, catalytic reactions, distillation purification and other experimental processes, especially suitable for organic reactions that require strict conditions.
Has good high temperature resistance, with a softening point of about 1730 ℃, can work for a long time at 1100 ℃ -1250 ℃, and can withstand high temperatures of 1450 ℃ in a short time; Except for hydrofluoric acid, it has good corrosion resistance to other acids, with an acid resistance 30 times that of ceramics and 150 times that of stainless steel; Good thermal stability, low coefficient of thermal expansion, able to withstand drastic temperature changes; Good transparency, with good transparency in the entire spectral range from ultraviolet to infrared, and a visible light transmittance of over 95%, making it easy to observe the progress of experimental reactions.
Structural features: It is usually designed with a round bottom and has four standard grinding ports on the bottle body. The middle port is usually used to install a stirrer, and the two sides of the port can be used for reflux, dropwise addition of reactants, installation of thermometers, pH meters, or introduction of protective gas. The front port can be used for adding reactants, exporting protective gas, etc. It can be connected to multiple experimental devices at the same time to achieve multifunctional integrated operation.
Before use, check the flask for any damage, aging, or other issues; Asbestos mesh should be used for heating, and direct heating with open flames is not allowed; The amount of liquid added should not exceed half of the flask volume; When adding liquid, it should be added slowly to avoid overflowing; After the experiment, turn off the power and wait for the flask to cool down before pouring out the liquid. When cleaning, use a soft brush or sponge to avoid scratching the surface.
Precautions for use
Sealing: Before use, check the sealing of the frosted interface to avoid leakage of reactants.
Heating method: If open flame heating is used, it should be carried out on asbestos mesh to ensure uniform heating and prevent the flask from breaking.
Liquid capacity: The injected liquid should not exceed 2/3 of the flask volume to prevent liquid overflow during boiling.
Cleaning and maintenance: After use, it is necessary to clean thoroughly to avoid residue corroding the glass or affecting subsequent experimental results.