Waste liquid continuous collection device of vacuum rotary evaporator

Abstract

The invention discloses a waste liquid continuous collection device of a vacuum rotary evaporator. A condenser master three-way valve is added below a condenser of a traditional vacuum rotary evaporator so as to control condensate to flow into a waste liquid bottle at the left or right side. The two waste liquid bottles at the left side and the right side are used for alternatively collecting the condensate. When one bottle is full and the other bottle is alternated for collection, the concentration process is not stopped. Therefore, when a large quantity of solution is concentrated continuously, the concentration efficiency is improved and the consumption of electricity and cooling water is lowered. The lower part of each waste liquid bottle which is full of condensate is provided with a liquid discharging valve, and an upper connecting pipe is provided with a three-way valve and an air inlet, so that the pressure inside the bottle is balanced and the discharge of the condensate is facilitated. After the liquid discharging valves and the air inlets are closed, the waste liquid bottles can be alternated for collecting condensate next time, so that the waste liquid is collected continuously. The waste liquid continuous collection device has significance for improving the concentration efficiency of chemical liquids in laboratories as well as lowering the waste of water and electricity.

Description

technical field [0001] The invention relates to a device for continuously collecting waste liquid of a vacuum rotary evaporator, in particular to a device for continuously collecting waste liquid of a medium or small vacuum rotary evaporator used in a laboratory. Background technique [0002] Vacuum rotary evaporator is an indispensable routine equipment in chemical and pharmaceutical laboratories, and is widely used in the concentration and chemical synthesis of liquid medicine. Generally, it is composed of several parts such as water bath heating device, round bottom flask, condensation device, vacuum device, waste liquid collection device and control device. Since the liquid is concentrated under negative pressure, the solvent will boil at a lower temperature, which not only improves the concentration efficiency, but also greatly reduces the damage of the solute caused by high temperature and long time concentration. [0003] The problem with the common vacuum rotary eva...

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Problems solved by technology

[0003] The problem with the common vacuum rotary evaporator in the laboratory at present is that there is only one waste liquid collection bottle with a small volume. When concentrating a large volume of solution, the concentration process has to be repeatedly interrupted in order to collect the liquid in the waste liquid collection bottle. pour out

Like this, not only wasted time, but also wasted electricity and cooling water

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