Heated bath

A heating bath used in the laboratory to run a chemical reaction at elevated temperature. In addition, be in the Sogn. Molecular cuisine Baths used as an innovative appliance for food preparation.

The heating bath is a liquid, which is located in an open (metal) pot or crystallizing. As a liquid, especially water, polyethylene glycol, oil or special low-melting metal alloys such as Roses metal come to use. A water bath is used at temperatures up to 100 ° C. A Glycolbad is used between 100 ° C and 200 ° C. An oil bath is also used at temperatures above 100 ° C. At very high temperatures a metal bath or sand bath is used. The heating bath is heated on a hot plate with magnetic stirrer zurmeist. In the heating bath, the reaction vessel ( round-bottom flask, conical flask, beaker ) or a distillation flask is immersed. To control the temperature of the heat transfer liquid, a thermometer can be held in the liquid. For heating baths used today, the temperature control via an automatic comparison between desired and actual temperature by a contact thermometer is done, if necessary, the heating will start.

There are also Baths without liquid or solid heat transfer medium: air baths are primarily used in the distillation of volatile, so a low boiling point solvent. Since air is a little more effective heat transfer medium, only small amounts of heat can be transferred with air baths. Infrared heating baths are also among the air baths.

Alternative

An alternative to heating baths provide heating mantles is, but these can not be combined with magnetic, so this will require the use of a precision glass stirrer or other measures ( Boiling chips, et cetera ) to prevent boiling.