The constant temperature Water Bath is a commonly used equipment in the chemical laboratory. It uses the heating and evaporation of organic solvents, the dissolution of samples, the formation of products and precipitates, the determination of physical properties, and quantitative analysis. There are many types of constant temperature Water Baths, and different forms of constant temperature Water Baths can be selected according to the specific requirements of the experimental content. For example, a porous square trough-shaped electric heating constant temperature Water Bath, some of which can be put into 8 beakers at the same time, can be used for precipitation, dissolution, evaporation and other operations, and a round glass wall constant temperature Water Bath can be used to measure properties, such as viscosity, surface tension and some chemical properties. Response: The super constant temperature Water Bath with love and water can deliver constant temperature water and be used as supporting equipment for other precision instruments (such as refractometers, etc.).
In addition, if low temperature conditions are required in the experiment, a low temperature bath can be used; if a temperature of 100°C is required, a constant temperature Oil Bath can be used.
Table l0-1 lists the technical parameters of several constant temperature baths.
new type bath
When developing new products in the chemical laboratory, it is often necessary to observe the reaction phenomenon. If the reaction requires a higher temperature, an Oil Bath is used. Due to the local overheating of the sub-heating device, the oil is easy to carbonize and the color becomes darker, falling into ash, and impurities also affect the bath liquid. transparency, and the Oil Bath is not convenient enough to use.
The new heating material "electric heating film" developed in the 1990s has been gradually adopted in chemical laboratories. It has the advantages of transparency, corrosion resistance, fast heating speed, easy control, and long service life. It is used as a heating material for water and Oil Baths. In addition, the air bath jacket made of it can directly observe the status of the chemical reaction (some directly plate the electric heat rattan on the outer wall of the glass reactor). Temperature control generally adopts electric contact thermometer temperature controller (below 250 ℃), and other temperature control instruments are used for higher temperature.
