Rotary evaporator RE-2000A

Solvent Recovery and Concentration Through Rotary Evaporation

Picture running a natural product extraction where you've just pulled alkaloids from 500g of plant material using ethanol. You're staring at liters of solvent that need to come off before you can see what you've actually isolated.
A postdoc in our building recently switched from using a nitrogen blow-down setup to the RE-2000A, cutting her solvent removal time from four hours to about forty minutes.

Efficient Solvent Recovery from Natural Product Extractions

She runs it at 60°C with the water bath while the rotation keeps the flask surface constantly refreshed, preventing bumping that used to plague her concentration steps. The unit handles up to 2L evaporating flasks, though most daily work happens with 1L round-bottoms.
One chemistry lab pairs their RE-2000A with a recirculating chiller for temperature-sensitive compounds—the chiller maintains condenser temperature at -10°C while recovering dichloromethane from reaction workups. Without that cooling power, you'd lose volatile solvents right past the condenser.

Alkaloid Concentration Techniques

Speed control from 0-310 rpm means you can dial in the exact agitation needed. Viscous samples like honey-thick crude extracts need slower rotation around 80-100 rpm to prevent flask climbing, while thin solvents like acetone or methanol work beautifully at 200+ rpm.
The digital water bath covers 5°C to 40°C, which sounds limited until you remember you're working under vacuum. At 100 mbar, ethanol boils at room temperature. That 40°C ceiling actually protects heat-sensitive natural products and prevents thermal degradation of peptides or proteins.
A colleague concentrating samples for the Glass reactor GRL-20CE runs his pre-concentration at just 30°C under 50 mbar vacuum—gentle enough that his yield stays consistent batch after batch. When he needs more precise temperature control for exothermic reactions, he switches to the Heating cooling system HR-70 for the reactor itself.

Large-Batch Processing Capabilities

• Vertical condenser design with GG-17 borosilicate glass handles most common organic solvents without etching or clouding
• Vacuum capability to -0.098 MPa pulls even stubborn high-boiling solvents like DMF or DMSO when you're stuck with them from literature procedures
• Collection flask capacity matches evaporation flask at 2L maximum, preventing mid-run emptying during large-scale solvent recovery

Labs running both the Glass reactor GRL-20CE and this rotovap create an efficient workflow—reactions happen in the glass reactor, then crude mixtures transfer directly to the RE-2000A for workup. The Glass Vacuum Filter CLZZ-20 fits between these steps when you need to remove precipitates before concentration, or scale up to the Glass Vacuum Filter CLZZ-30 for larger batches.

Rotary Evaporation Speed Optimization

The control panel sits at eye level with actual numeric displays instead of analog dials that require guessing. Set your rotation speed, watch the temperature climb in real-time, and the auto-lift function raises your flask when you hit the stop button. No more manual cranking while trying to avoid steam burns.
Footprint measures 66×42×83cm, fitting on standard benchtops alongside other equipment. The 40W motor runs quietly enough that you can work at the same bench without shouting over mechanical noise.
One organic lab runs three RE-2000A units side-by-side, processing parallel synthesis batches simultaneously. They supplement with the Heater UC-5020 for pre-warming viscous samples before loading, which speeds up the initial evaporation phase when dealing with cold storage compounds.