Introduction to the installation and use of the rotary evaporator

Introduction to the installation and use of the rotary evaporator The rotary evaporator is mainly used for continuous distillation of a large number of volatile solvents under reduced pressure conditions, such as distillation extracts and receiving liquids in chromatographic separation
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So, how to install the rotary evaporator? And what should be paid attention to when using it? Let’s find out with me below
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The installation method of the rotary evaporator: 1.
Insert the vertical rod supporting the glass condenser, and then tighten two stainless steel screws to fix it
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2.
Put the evaporating tube into the shaft of the reducer and tighten the pressure cap
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Install parallel rings, O-rings, T-rings
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3.
Install the glass spool.
After the spool interface and the T-ring are properly positioned, tighten the large coil, but be careful not to over-tighten it, otherwise the service life of the O-ring will be shortened
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4.
To install the condensing bottle, evenly coat the interface of the condensing bottle with vacuum grease, insert it into the No.
40 grinding mouth of the four-way, and then tighten the fixing screw on the belt block, and adjust the position of the screw and the long hole of the belt.
, change the position and angle of the glass spool and the sealing ring, and achieve a vacuum state
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 　　5.
Install the receiving bottle and evaporating bottle on the rotary evaporator.
After the grinding mouth is evenly coated with vacuum grease, clamp it with a clip
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 　　6.
Add an appropriate amount of water to the water bath, turn on the power supply, set the heating temperature, the heating indicator light is on, and it can be used normally
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 　　7.
Place the evaporating bottle in a proper water bath according to the lifting height and moving distance of the rotator of the rotary evaporator.
8.
Description of the locking sign: turn the handle to the left, loosen the locking device and adjust it to the proper position Tighten to the right after the height
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 　　Precautions for the operation of the rotary evaporator: 1.
When using, a small vacuum (about 0.
03MPa) should be drawn first, and then the rotation should be turned on to prevent the distillation flask from slipping; When the temperature drops to about 0.
04MPa, stop the vacuum pump to prevent the distillation bottle from falling off and sucking back
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 　　2.
Each interface, sealing surface, sealing ring and joint need to be coated with a layer of vacuum grease before installation.
3.
Water must be added before the heating tank is powered on, and dry burning without water is not allowed.
, The air tightness of the glass bottle
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 　　5.
When rotary-evaporating air-sensitive substances, connect a nitrogen balloon to the exhaust port, first pass a burst of nitrogen gas, exhaust the air in the rotary evaporator, and then connect the sample bottle for rotary evaporation
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After evaporating, release nitrogen to increase the pressure, then turn off the pump, and then remove the sample bottle and seal it
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 　　6.
If the viscosity of the sample is very large, the rotation speed should be slowed down and rotated slowly by hand, so that a new liquid level can be formed and the solvent can be evaporated
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 　　The above is an introduction to the installation and use of the rotary evaporator.
I believe that everyone has a corresponding understanding of this after reading it, and I hope it will be helpful to everyone
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