Factors affecting the efficiency of rotary evaporator and its adjustment

Rotary evaporators and other types of evaporators have compact structure, intuitive operation and no metal ion pollution It is suitable for laboratory, pilot production and extraction of precious materials Its sealing performance is comparable to that of foreign machines Under the corrosion of various solvents and in the moving state, whether the high-frequency infrared carbon sulfur analyzer system can maintain a high vacuum degree is the main standard to measure the rotary evaporation instrument Zui It is sealed with Teflon material and glass, which can withstand various solvents, has a lasting and reliable air tightness, and can maintain a high vacuum degree above 0.098mpa The main factors that affect the efficiency of rotary evaporators are steam temperature, vacuum degree and cooling water temperature Restricted by the heat resistance of some materials, it is impossible to increase the steam temperature infinitely during operation, so high vacuum degree and low cooling water temperature are the two main factors for raising the rate The difference between the vertical condenser and the inclined condenser the vertical condenser is gradually popular because of its small space The large capacity evaporator generally adopts the vertical condenser, but in essence, there is no difference between the two instruments High and low adjustment of rotary evaporimeter: manual lifting, turning the hand wheel on the column, turning clockwise to ascending, reversing to descending Electric lifting, touch the up key to raise the main engine, and touch the down key to lower the main engine There are two external joints on the condenser for cooling water, one is connected with water inlet, the other is connected with water outlet, generally connected with tap water, the lower the temperature of condensate, the better the effect The upper port is equipped with a vacuum joint, which is connected to the vacuum pump sheath for vacuum pumping Turn the speed control knob left to Zui before starting the evaporator, press the power switch indicator light to light, and then slowly turn it right to the required speed Generally, medium and low speed solutions with high viscosity are used for large evaporation bottles The flask is No 24 standard interface, with two kinds of flasks of 500ml and 1000ml attached, and the amount of solution is generally not more than 50%.