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Chapter 14: Solvent Removal -

Chapter 14: Solvent Removal -

2. Prepare the rotovap. Using the handle, raise up the core part of the rotovap assembly. If the solvent trap is more than half-full, detach it and empty it into the organic waste. Check that the rotovap’s bump trap and adapter are clean. If the sample will become a free-flowing powder after the solvent is removed (for instance, if you are

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Use of the Rotovap - uwindsor.ca

Use of the Rotovap - uwindsor.ca

7. Make sure the solvent receiver is empty. 8. Ensure that you know what pressure to lower the rotovap to based on the chart. 9. Turn on the pump, decrease the pressure to the target. 10. Use up down switch to make the flask is submerged in the bath water. 11. Turn on the rotation. 12. Adjust the speed of rotation.

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Home Environmental Health Safety UCI

Home Environmental Health Safety UCI

A rotary evaporator (rotovap) is a fast and effective method of removing solvent from a flask. A rotovap removes solvent by reducing the pressure within the flask using a vacuum, rotating the sample to increase its effective surface area, and heating the solution.

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Standard Operating Procedure Task: Rotary Evaporation

Standard Operating Procedure Task: Rotary Evaporation

air using the ground glass joint. Turn off the vacuum pump using the switch on the pump, turn off the water bath heat if used, and turn off the rotovap by pressing the appropriate power buttons and turn off the water at the tap 12. Empty the collection flasks (both attached to the rotovap and the vacuum pumps after every use! Notes: • Be ...

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Selecting a Suitable Vacuum Pump for Your Rotary Evaporator

Selecting a Suitable Vacuum Pump for Your Rotary Evaporator

Apr 04, 2019 Ideally, a pump used in a rotovap setup should be oilless and chemical-resistant to make sure it lasts as long as possible. The most commonly used pumps for this purpose are diaphragm (or membrane displacement) pumps. A variety of pumps (from left to right): an ME1 Diaphragm Pump, a VP Series Vacuum Pump, and a MVP 10 basic Vacuum pump.

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Rotovap - Dartmouth College

Rotovap - Dartmouth College

Below is a photograph of a rotary evaporator. Important Features of the Rotovap. 1) The vacuum pump is the source of reduced pressure in the system. 2) Spin speed and bath temperature control knobs. 3) Water bath. 4) Bump guard. 5)Cold finger. (Please do not use the rotovap if the finger is not cold.

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How to Clean Your Rotary Evaporator Blog

How to Clean Your Rotary Evaporator Blog

Dec 16, 2019 If you’re using an oil-free pump such as a membrane pump, it could become flooded with solvent. If this happens, you’ll need to keep it running to help clear the solvent and dry it out. In either case, in the long run, you’re better off skipping this cleaning method altogether and dismantling your setup for cleaning instead. 2.

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Rotovap - Lab Instrument Manufacturer

Rotovap - Lab Instrument Manufacturer

Jul 08, 2021 Rotary evaporators, commonly known as rotovaps , rotavaps or rotavapors, are extremely valuable to a number of downstream applications requiring efficient distillation solvent removal. Often combined with a vacuum pump, rotary evaporators are used to remove solvents from samples through evaporation. During this process, rotary evaporators reduce …

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Standard Operating Procedure: Rotovaps - Chemistry

Standard Operating Procedure: Rotovaps - Chemistry

Jun 06, 2016 Before using the rotovap, operator should be familiar with the various rotovap components and definitions. First take your sample solution (in round bottom flask—volume half full) to the rotovap you wish ... seconds to purge the pump from any solvent prior to turning off the pump (if using the belt drive pump, ...

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Standard Operating Procedure: Rotovaps - Chemistry

Standard Operating Procedure: Rotovaps - Chemistry

Jun 06, 2016 this step is not required—simply close off the vacuum control valve at the top and power down the pump as per the lab’s accepted procedure for belt drive pumps). Empty the …

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Five ways to optimize the pressure values of your rotary

Five ways to optimize the pressure values of your rotary

Jun 17, 2020 97. Toluene. 48. Water. 42. 3. Keep the pressure at constant values – Sudden changes of pressure will either stop the distillation or cause bumping or foaming. A great way to consistently maintain pressure values is to use an interface-controlled system, which greatly reduces pressure fluctuations. 4.

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How to Speed Up Your Rotary Evaporation Process

How to Speed Up Your Rotary Evaporation Process

Jun 26, 2019 The solvent vapor can damage the pump and shorten its lifespan. Potentially toxic vapors may also go through the pump and be released into the atmosphere. To avoid this, use the rule of 20 and ensure that the coolant is always at least 20C cooler than the vapor temperature. Also, check the cooling capacity of your chiller against the heating ...

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Rotary Evaporator (Rotovap) Issues and the Smart Solution

Rotary Evaporator (Rotovap) Issues and the Smart Solution

Mar 11, 2019 Bumping is a common problem while using rotary evaporators, as samples being heated under vacuum in closed conditions causes the solvent to suddenly boil and “bump,” in other words erupt, usually quickly without warning. As the rotovap evaporates the solvent under vacuum, the solvent can be sucked up in its entirety, leading to the loss of ...

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How to use a rotovap -

How to use a rotovap -

Mar 26, 2019 To relieve the bumping, reduce the vacuum using the air bleed. Once the solvent has evaporated, the appearance of the flask will depend on the physical state of the product i.e. the residue may be a solid or an oil. When finished, raise the flask and turn off the rotation. Open the air bleed and turn off the vacuum pump.

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Ethanol Removal in Cannabis Applications Blog

Ethanol Removal in Cannabis Applications Blog

Oct 31, 2019 Optimal Rotovap Operating Conditions for Ethanol Removal. The recommended vapor temperature for ethanol extraction is 25–30C. Boiling ethanol at 30C requires a pressure of 123 mbar, and boiling at 25C requires a pressure of 95 mbar. The 20/40/60 rule offers a general guideline for rotovap operating conditions.

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Rotovap Use: How To Reduce Bumping Video

Rotovap Use: How To Reduce Bumping Video

Reduce bumping on the rotovap to minimize compound loss while removing solvent under reduced pressure. Otherwise, you'll find yourself diassembling and rinsing every square inch …

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Rotary Evaporator Fact Sheet - UMass Amherst

Rotary Evaporator Fact Sheet - UMass Amherst

solvent) and clog traps. Water aspirators should not be used as these can allow solvent vapors to enter drains and waste large volumes of water. 5. Check all glassware for visible chips, cracks or scratches before using. Handle glassware with care at all times. 6. Always use a cold trap in between the rotovap and the pump. Never use a liquid

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How does a rotary evaporator remove solvent?

How does a rotary evaporator remove solvent?

The preferred method for solvent removal in the laboratory is by use of a rotary evaporator, also known as a “rotovap”. A rotary evaporator is essentially a reduced pressure distillation: a solution in a round bottomed flask is placed in the water bath of the apparatus , and rotated while the system is partially evacuated (by a water aspirator or vacuum pump).

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RotoVap vs Falling Film Evaporation - TruSteel LLC

RotoVap vs Falling Film Evaporation - TruSteel LLC

The RotoVap Limitations. For years, the industry standard for solvent recovery has been the rotary evaporator, or otherwise known as the RotoVap. A generic 20L RotoVap has a recovery rate of about 1.5 gallons per hour. For small-scale setups, this may suffice, but large-scale manufacturers have been forced to run multiple RotoVaps.

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Pumping Off Solvent Using Rotovap

Pumping Off Solvent Using Rotovap

Turn off the vacuum pump using the switch on the pump, turn off the water bath heat if used, and turn off the rotovap by pressing the appropriate power buttons and turn off the water at the tap 12. Empty the collection flasks (both attached to …

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Solvent Removal - Organic Chemistry at CU Boulder

Solvent Removal - Organic Chemistry at CU Boulder

Use a Keck clip to secure the flask to the apparatus. Make sure the water flow to the cooling coils is turned on. Turn on the motor so that the flask rotates. Usually the flask containing the solution to be evaporated is warmed by a water bath; consult your TA to see if it is necessary. Make sure the vent at the top of the cooling coils is closed.

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Concentrating Extract in a Rotovap - VACUUBRAND

Concentrating Extract in a Rotovap - VACUUBRAND

Vacuum solutions for concentrating extract in a rotavap. MD 4C NT. High flow and deep vacuum for ovens and rotary evaporators. Strong chemical resistance with wetted materials made from fluoropolymers. Ultimate vacuum (abs.) = 1.1 torr. Max. pumping speed = 63 LPM. View product page. PC 3004 VARIO select. Automation capabilities for ovens and ...

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