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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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Tips and Tricks for the Lab: Air-Sensitive Techniques (4)

Tips and Tricks for the Lab: Air-Sensitive Techniques (4)

Aug 06, 2013 Remove the stopper from the NMR preparation tube and replace it with a rubber septum. A bleed needle should be inserted through the septum to flush out the small volume of air in the septum. Using the techniques described in part 3, transfer 1 mL of dry, degassed, deuterated solvent into the Schlenk flask containing the compound to be analyzed.

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Reduction and dehydration of acetylferrocene - ChemSpider

Reduction and dehydration of acetylferrocene - ChemSpider

Aug 14, 2014 This procedure is often more convenient for us than rotary evaporation due to the length of time required to remove toluene on the rotovap, but removal of the solvent by rotovap worked in our experience as well. We use a crude form of dry-column vacuum chromatography (a plug column) to avoid the need to run a column on the product.

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Buchi 20/40/60 rule for Rotary Evaporators

Buchi 20/40/60 rule for Rotary Evaporators

Doc: CHEMFS rotovap pressure-temp Custodian: Dept. Chem. School Safety Coordinator Page 1 of 1 Created: Feb 2005 Last Review : Dec 2010 Next Review: Dec 2013 ... Toluene Trichloroethylene Water Xylene *-850 mbar recommended Formula CHO CHO s 12 4 10 CHO 4 10 CHO 6 12 2 CH Cl 6 12 CH Cl CHO 4 10 CHO 6 14 CHO C H NO CHO CHO 7 16

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PRODUCTION OF SOLID EPOXY RESIN -

PRODUCTION OF SOLID EPOXY RESIN -

In an improved process for preparation of glycidyl ether resins that are solid at room temperature, sometimes referred to as solid epoxy resins”, from a reaction mixture of an aromatic hydroxyl-containing compound, an epihalohydrin and an inorganic hydroxide, add a reaction solvent that has both a ether moiety ad an alcohol moiety to the reaction mixture and use mole-equivalent …

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How Does a Rotovap Work? - Lab Instruments - Lanphan

How Does a Rotovap Work? - Lab Instruments - Lanphan

Jan 18, 2017 To remove algae gunk from the inside of a coiled water condenser, the condenser has to be removed from the rotovap and the coil is soaked in a dilute nitric acid solution for a few hours. After carefully rinsing the insides, the rotovap is reassembled. All standard safety precautions should be followed when working with nitric acid!

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Rotovap Distillation: What Is A Rotary Evaporator? BVV

Rotovap Distillation: What Is A Rotary Evaporator? BVV

Jul 21, 2017 The rotovap size depends on how many liters you need to recover. That being said, the most common sizes are 5L, 10L, 20L, and 50L. The size refers to the size of the evaporating flask. It’s important to note that the flask is not loaded at max capacity during operation, but usually around 20-40% capacity. ...

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Azeotropes in Rotary Evaporation Blog

Azeotropes in Rotary Evaporation Blog

Jun 21, 2021 Considerations When Evaporating Azeotropes with a Rotovap. Depending on your specific application, azeotropic behavior may be a help or a hindrance. Here are some factors to consider: 1. Desired compounds can form azeotropes with solvents ... For example, benzene or toluene can be added as an entrainer to an ethanol/water mixture. The added ...

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To Grease or Not to Grease Blog

To Grease or Not to Grease Blog

May 04, 2017 There are, however, cases in which greasing your flask will be beneficial. High boiling solvents such as toluene require a higher vacuum to be removed. Here, grease is needed to improve the seal and allow for the pressures required to remove that solvent. Just make sure to clean it for the next user!

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The Rotovap: Why Bartenders Love It -

The Rotovap: Why Bartenders Love It -

Sep 17, 2020 The rotovap has a large number of applications in cocktails, but essentially it’s used either to add flavor or to remove undesirable characteristics of an ingredient. “This machine is excellent at capturing and preserving the aroma of spices, herbs and other ingredients but really specifically with the fresh herbs,” says Arnold.

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Rotovap - Dartmouth College

Rotovap - Dartmouth College

The purpose of the rotovap is to remove low boiling organic chemicals, usually solvents, from a mixture of compounds. The rotary evaporator is the method of choice for solvent removal in the modern organic laboratory. The solvents or low boiling compounds are removed by a simple distillation. The rotovap is designed to be operated under a ...

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Operation of the Rotary Evaporator (Rotovap)

Operation of the Rotary Evaporator (Rotovap)

The rotovap itself consists of the following parts: a) a long condenser containing a distillation tube surrounded by a coil of glass tubing. This glass tubing will have cold water running through it to provide a cooling atmosphere for the gas as it is being distilled. ... DO NOT REMOVE the flask by pulling straight downwards; this can result in ...

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Can Rotary Evaporator Remove Water? - WKIE

Can Rotary Evaporator Remove Water? - WKIE

Yes, the rotary evaporator can remove water but it is dependent on the factors listed above. You have to take the time to understand how to use the machine as that is the only way to feel safe about what you are doing. Too many people assume the same settings are going to get the job done bu that is not the case.

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