The instrument function of the retort

The retort flask is the first kind of distillation flask created by glass instruments. Its handle is used instead of the cooling pipe, integrating distillation and condensation. It is generally used in laboratories to prepare sulfur dichloride, sulfuric acid, etc. The plug is convenient for inserting a thermometer or a separating funnel.
Retorts do not spoil organic matter. Because the gooseneck bottle is an open bottle, when the temperature inside and outside the bottle is the same, the pressure inside and outside the bottle is the same, there is no pressure difference, and there is no air flow inside and outside the bottle, so microorganisms cannot enter the bottle and cause pollution. When heating the organic matter water infusion in the bottle to boil, the air and water vapor will flow out of the bottle through the gooseneck together, and the part of the gooseneck will also be sterilized, and water vapor will condense and remain in the lowest part of the gooseneck. When the heating is stopped . The liquid in the bottle is cooled, and the water vapor condenses. When the air is cooled, there will be a pressure difference between the inside and outside of the bottle, and some air will enter through the gooseneck, but the air must pass through the water condensed at the lower part of the gooseneck, and the water will absorb the microorganisms in the air. Staying in the bottle ensures that the air entering the bottle is free of microorganisms. When the internal and external temperatures are balanced, there will be no more air flow, thus ensuring that the organic matter water infusion is not rotten.
There is a glass stopper at the mouth of the bottle, and a side pipe at the neck of the bottle. It is mainly used for the reaction of liquid or solid-liquid mixture to produce gas, or to produce low-boiling liquid under heating conditions. It is often used with a receiver. For example, nitric acid, bromine, etc. can be produced in the laboratory. Can be heated directly on fire.