1. Heating of the oil bath
The heating of the oil bath is a heat bath method that uses high-temperature heat-conducting oil as the material of the heat bath. Commonly used oils include soybean oil and cottonseed oil. The maximum temperature of oil bath is higher than that of water bath, generally between 100 ℃ -300 ℃. The operation method of the oil bath is the same as that of the water bath, but the oil bath should be operated carefully to prevent the oil from overflowing or the oil bath heating up too high, causing fire.
Second, the heating of the water bath
The heating of the water bath is a method of using a water bath as a heat bath material. Since the water temperature is under standard atmospheric pressure, the maximum temperature is 100 ° C, so the maximum temperature of the water bath is also 100 ° C. The method of using a water bath to treat container products is to immerse the container that needs a water bath in a larger container that contains water. Stop heating at temperature and remove the water bath container after cooling.
Temperature difference: water bath temperature room temperature-100 ℃, oil bath temperature 100 ℃ -300 ℃.
Heating process:
When heating, the substance to be heated is usually placed in a container, and the container is placed on a heat source. Some containers, such as glass containers and ceramic containers, if placed directly on the heat source, the temperature rise is too fast due to uneven heating, and burst Or, due to poor heat transfer, the heating substance is unevenly heated. For this reason, the heating container products entering the laboratory should be treated with a hot bath. The so-called heat bath is a method of placing the container in the material of the heat bath, slowly raising the temperature of the material of the heat bath to a certain degree, and then allowing it to cool slowly, thereby improving the heat transfer performance of the container and making the bottom of the container uniform. Commonly used heat bath methods in the laboratory include water bath, oil bath, sand bath and so on.
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