The ethanol extraction rotary evaporator achieves efficient evaporation of ethanol at low temperatures through a process of pressure reduction distillation and rotational film formation. This method protects heat-sensitive components while also recovering the solvent.

Transfer the extract into an evaporation flask. Place it in a water bath at 40–45 ℃, with a vacuum of 0.09 MPa and a condenser at 0–5 ℃. Concentrate until it becomes syrup-like.

Mode	GK5	GK10	GK20	GK50
Working power supply (V/Hz)	Single phase 220/60		Three phase 220-240V/380v/60Hz
Main engine speed (RPM)	10~140	20~120
Rotary electric machine (W)	40	Brush-less 250
Rotating bottle (L)	5	10	20	50
Recovery bottle (L)	3	5	10	20
Condenser tube	Vertical double coil	Vertical main cold+cold side, high efficiency re-flux condenser
Water bath pot material	Stainless steel
Water bath pot size (mm)	Φ300×170	Φ350×220	Φ450×260	Φ550×320
Lifting function	Electric lift			Electric + hand lift
Lift stick (mm)	0~150	0~160	0~190	0~180
Whole power (KW)	2	3	4	4.0(220-240V)
Outline dimension (mm)	7650×400×1070	920×550×1700	1250×600×2100	1320×770×2340

Working principle

Reducing pressure distillation

The vacuum system of Ethanol extraction rotary evaporator reduces the pressure inside the evaporation flask to approximately 0.09 MPa, lowering the boiling point of ethanol from 78 ℃ to 35–45 ℃, thus preventing the samples from being damaged by high temperatures.

Rotational film formation

The motor drives the evaporation bottle to rotate at 50–310 rpm. The liquid forms a 0.1–0.5 mm thin film on the bottle wall, increasing the evaporation area by more than 10 times, resulting in a significant improvement in efficiency of Ethanol extraction rotary evaporator.

Condensation recovery

Ethanol vapor is rapidly cooled into a liquid through a serpentine or spherical condenser, with a recovery rate of over 95%, reducing waste and environmental pollution.