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APPENDIX 7 : How to use the rotary evaporator

12 Support the flask with your hand while you vent the rotary evaporator by turning the stopcock at the top of the rotary evaporator. If your flask contains a fine solid, you should vent slowly to prevent the solid from being sprayed around the flask (or indeed the whole rotary evaporator). 13 Turn off the rotation and remove the flask.

Rotary Evaporators Rotovaps [New Guide in 2022]

A rotary evaporator (or rotavap or rotovap) uses precise engineering to effectively remove solvents from a sample using evaporation. Most rotovaps make use of a vacuum and pressure control monitor to precisely control pressure within your system, increasing evaporation efficiency. In many commercial labs, these machines need to be running ...

Rotary Evaporator Safety - LabX

A rotary evaporator is essential to distill, dry, recover, or extract samples in many labs. However, any time solvents are being used, especially under pressure and with heat, significant safety concerns arise. Below, find some common safety concerns when using a rotovap. For any rotary evaporator, refer to the manufacturer’s instructions for ...

Rotary Evaporator - Built For Visionaries

A rotary evaporator, or rotavap, is a piece of equipment that efficiently and gently removes volatile solvents from your product through evaporation. The main components of a rotavap are: An evaporation flask, which contains the sample material. A motor that rotates the flask. A vacuum-sealed vapor pathway, which draws vapor off the sample.

Organic Syntheses Procedure

A solution of dimethyldioxirane (200 mL of a 0.08M solution, 16.0 mmol) (Note 3) is added to the flask via cannula and the reaction mixture is stirred at 0C for 10 min (Note 4). Volatile materials are then removed by rotary evaporation at 0C (Note 5) and the resulting white residue is dried

Large-Scale Rotary Evaporators

All rotary evaporators have a full range of accessories and glassware available. Sort by. On sale Calpha RE-5B Series Rotary Evaporators. Easy to operate motor lift in 20L or 50L with single or dual condenser and flasks, up to 99C. $ 7,884 USD from $ 7,096 USD On sale ...

Metal-Free Solvent Promoted Oxidation of Benzylic ...

An environmentally benign protocol for the generation of nitrones from benzylic secondary amines via catalyst-free oxidation of secondary amines using H2O2 in MeOH or CH3CN is described. This methodology provides a selective access to a variety of C-aryl nitrones in yields of 60 to 93%. Several studies have been performed to shed light on the reaction mechanism and the …

Lab Rotary Evaporators - Rotary Evaporators ...

AnEssOil 1L-5L Lab Rotary Evaporator Rotavapor 0-120rpm 0-399℃ SENCO Equipment w/Motor Lift, Digital Heating Bath, Condenser Full Set of Glassware Kits and Circulating Water Vacuum Pump (5L Liters) $4,283.00 $ 4,283. 00 ($856.60/Item) Get it Tue, Apr 26 - Tue, May 17. FREE Shipping.

Catalytic decomposition of dimethyldioxirane and cyclic ...

Apr 03, 2006 Two oxidants were added to reaction mixtures as stock solutions of 1 in acetone (typically 0.06 M, prepared and determined prior to use), 5 M solution of TBHP in decane or 1.4 M solution in chlorobenzene, obtained by extraction of TBHP from 70% aqueous solution into chloroform, addition of chlorobenzene and removal of chloroform on 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.

The reaction of cyclooctatetraene with dimethyldioxirane ...

Apr 09, 1999 Solutions were evaporated under reduced pressure with a rotary evaporator, and the residues were flash chromatographed on a silica gel or neutral alumina column using an ethyl acetate/hexane or diethyl ether/hexane mixture as the eluent unless specified otherwise. ... The dimethyldioxirane was prepared according to 4548 R. W. Murray et al ...

Training Paper - Distillation with a Rotary Evaporator

BCHI Training papers Distillation with a Rotary Evaporator 4 Advantages of the rotary evaporator (compared with static apparatus) Rotary evaporators are used for: 3 3.1 Rotavapormodels 3.3.1 Glass assembly With a vacuum rotary evaporator you can carry out single-stage distilla-tion runs quickly and gently. The evaporation capacity of a ...

Rotary Evaporators Fisher Scientific

Bump Trap, 250mL, Rotary Evaporator, Modified, 24/40 Top Outer, 14/20 Lower Inner. Similar to CG-1320, but with the addition of two 4mm drain holes at the base of the inner tube to allow solvent to drain back into the evaporation flask. Traps have a 24/40 top outer joint and the listed size of lower inner joint.

Working with Hazardous Chemicals - Organic Syntheses

cooled to 0 C. A solution of dimethyldioxirane (200 mL of a 0.08M solution, 16.0 mmol) (Note 3) is added to the flask via cannula and the reaction mixture is stirred at 0 C for 10 min (Note 4). Volatile materials are then removed by rotary evaporation at 0 C (Note 5) and the resulting white residue is dried at 2 mm for 5 min.

Stereocontrolled Formation of a [4.4]Heterospiro Ring ...

Dec 20, 2016 The volatiles were then removed by rotary evaporation, and the resulting residue was dissolved with ethyl acetate, washed with brine ... 0.033 mmol, 1.0 equiv) obtained above in acetone (0.70 mL) was added dimethyldioxirane (0.1 M in acetone, 0.73 mL, 0.073 mmol, 2.2 equiv) at 0 C. After the mixture was stirred at 0 C for 16 h, the ...

What are Applications of a Rotary Evaporator? - Rotovap

Dec 20, 2019 The use of a rotary evaporator to non-heat evaporate liquid, thus retaining volatile aromatics that are easily lost by heating, is a perfect combination of modern culinary and experimental instruments. Because of so many applications, a rotary evaporator has been quite well-received these days. Working Principle of a Rotary Evaporator

Supporting Information: General

Dimethyldioxirane (DMDO) in methylene chloride was prepared as previously described.1 The crude ... The solvent was removed on a rotary evaporator and the resulting white solid dried in vacuo. The crude epoxide was dissolved in freshly distilled THF (10 mL). The appropriate trapping agent was added (5 equivalents) and a solution of ...

MDP2P/4-MeO-P2P from Isosafrole/Anethole via ... - Erowid

Dimethyldioxirane Epoxidation of anethole and asarone 4. ... (25 mL), and dried over anhydrous sodium sulfate. Removal of the solvent on a rotary evaporator yielded 1.94 g of oil that was distilled in a short path distillation apparatus (45C oil bath, 0.1 mmHg) to yield 0.84 g (38%) of trans-Anethole Oxide. References.

What is a Rotary Evaporator?

Feb 14, 2022 Rotary evaporators (rotovaps) are devices employed for removing solvents efficiently via the process of evaporation. The rotary evaporation process is one of the most widely used methods of solvent evaporation due to its optimal extraction and distillation performance. Rotary evaporators are also used for concentration, crystallization, drying ...

Rotary Evaporator - Pengertian Fungsi Prinsip Kerja dan ...

Feb 18, 2020 Pengertian rotary evaporator sangat erat kaitannya dengan proses evaporasi. Terdiri dari dua suku kata, yakni : Rotary bisa diartikan berputar atau ber-rotasi, dan. Evaporator mengacu kepada alat yang digunakan untuk proses evaporasi (penguapan). Evaporasi sendiri bisa didefinisikan sebagai proses menguapnya pelarut dari cairan (liquid) akibat ...

Heidolph Instruments : Rotary Evaporators

In close cooperation with users, we developed the Hei-VAP series of rotary evaporators with an emphasis on the essentials: well thought-out details with a focus on features and functions to facilitate everyday laboratory work. Versatile combinations with glassware and extensive accessories offer the right configuration for every application.

Heidolph Instruments : Rotary Evaporators

In close cooperation with users, we developed the Hei-VAP series of rotary evaporators with an emphasis on the essentials: well thought-out details with a focus on features and functions to facilitate everyday laboratory work. Watch the Heidolph stories. Versatile combinations with glassware and extensive accessories offer the right ...

What Recommended Pressure and Temperature of Rotary ...

It really helps. Hi Rukman. 100 mbar and 40C seems a little aggressive. Following the rule of 20, if you are setting your bath to 40C, you should set your vacuum such that the boiling point ...

Laboratory Technique - Rotary Evaporator Optimization ...

Jan 01, 2020 Rotary evaporation is a powerful technique for quickly removing solvent from a solution of cannabis or hemp extract. There are two distinct methods of operating a rotary evaporator: batch or continuous; choosing the correct one for the task is crucial. For the purposes typically required in the cannabis industry, i.e. winterization or color ...

Photoinitiated cationic polymerization of epoxy alcohol ...

Jan 21, 2000 The organic phase was dried over anhydrous magnesium sulfate, and the solvent was removed with a rotary evaporator. The resulting oil was subjected to vacuum distillation. The desired product, 3-cyclohexene-1-methyl methyl ether (bp = 34–35 C at 0.5 mm Hg) was obtained in a 61% yield (5.77 g) as a colorless oil.

Oxidation with dioxiranes - Organic Reactions Wiki

Jun 06, 2011 The most common dioxiranes employed for organic synthesis are dimethyldioxirane (DMD) and trifluoromethyl-methyldioxirane (TFD). ... Removal of the solvent on a rotary evaporator (–20, 15 mmHg) afforded a mixture of the 1,3-dihydroxyadamantane (156 mg, 91%) and the monohydroxy adamantane (4.6 mg, 3%). Spectral data for 1,3 ...

Selective and metal-free epoxidation of ... - Royal Society

May 02, 2018 Among them dimethyldioxirane (DMDO), known as Murray's reagent [11,12], is an oxidant used in organic synthesis and considered as an environment-friendly oxygen transfer reagent for suitable substrates without the need for a catalytic system containing transition metal [13 ... Remaining CH 2 Cl 2 was removed with a rotary evaporator.

Selective and metal-free epoxidation of terminal alkenes ...

May 02, 2018 Among them dimethyldioxirane ... Remaining CH 2 Cl 2 was removed with a rotary evaporator. A pale purple product 1 as powder was isolated (9.5 mmol, 95% yield). Polymerization of 1 (scheme 1) (6.0 mmol) was done in the presence of concentrated KOH (50% (v/v), 20 mmol) at 80C which after stirring for 16 h afforded a dark yellow solid (PSA, 2).

Method of controlling polymer molecular weight and ...

May 09, 2001 The reaction mixture was transferred to a 2 liter round-bottomed flask and the solvent removed with a rotary evaporator (aspirator pressure) to give a white residue. The residue was extracted with 850 ml of boiling ethanol. ... An acetone solution of 260 ml of 0.08M dimethyldioxirane (0.0208 mol), prepared as above, was treated with 2.3 g of 2 ...

rotary evaporator

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Rotary Evaporators - discounted pricing on our wide range

New RE100-Pro rotary evaporators from Wolflabs have been added. LCD Digital Rotary Evaporator is an essential instrument in chemical laboratories for the efficient and gentle removal of solvents from samples by evaporation. It offers …

Eyela Rotary Evaporator India -

NEWS Rotary Evaporator, N-1300 (7) 2021.11.29(Mon) NEWS 10L 20L Rotary Evaporator (6) 2021.11.29(Mon) NEWS 10L 20L Rotary Evaporator (5) Customer support Backing-up your research development by seamless support; Dealer net-working For more info. about EYELA products, please contact A dealer near your location.

The reaction of dimethyldioxirane with chrysene: Formation ...

Nov 25, 1996 We now report that dimethyldioxirane 1 reacts with chrysene 211 to give the interesting trioxide 3 (Scheme 1). ... Solvent was removed on a rotary evaporator to give a dark orange-red residue (0.0934 g). GC/MS and 1H NMR analysis of the residue indicated the presence of the products described above and two other minor products. One of these was ...

Rotary Evaporator Fact Sheet - UMass Amherst

Rotary Evaporator Fact Sheet . What are Rotary Evaporators? A rotary evaporator (also called as “rotavap” or “rotovap”) is a device used in labs for the efficient and gentle removal of solvents from samples by evaporation. The picture on the right shows what a typical rotary evaporator includes. What are Potential Hazards?

Standard Operating Procedure - Rotary Evaporator

Rotary Evaporator in the P.O.W.E.R. Laboratory Elliot Sepos, April 2012 Description of Process Some chemical procedures require a quick and effective separation of substances through evaporation. The Rotary Evaporator is a tool which puts the separable substance under vacuum and heats evenly through a spinning motion, causing one component to ...

Rotary Evaporator - Ideal Vac

Rotary Evaporator RE200/210 Manual lift with analog control Rotation speed control range 20~180rpm Evaporating / receiving flask 1L(Standard) Water bath temp. range Room Temperature+5 to 95C RE-200-200A with optional arm jack (Glassware A) RE-200-200B with optional arm jack (Glassware B) RE-200-200C with optional arm jack (Glassware C)

(PDF) Preparation of Ethenyl and Oxiranol Carbamate and ...

rotary evaporator, with the distillation flask immersed in ice-water. The ... freshly prepared dry dimethyldioxirane solution (21 ml of a 0.08 M solution, 2.2 equiv) ...

Kinetics of oxidation of fullerene C60 with dimethyldioxirane

Sep 21, 2004 The kinetics of the reaction of dimethyldioxirane with fullerene C60 was studied, and the activation parameters logk = (8.30.8) – (14.20.9)/θ, (θ = 2.3RT kcal mol–1) (20—45C) were determined. ... After the reaction was completed, the solvent was evapo 60%, respectively. A biradical mechanism of forma rated on a rotary evaporator ...

What is the purpose of using the rotary evaporator? - Lab ...

The purpose of using the rotary evaporator. We use the rotary evaporator (rotovap) for two main purposes: 1.to concentrate non-volatile components in a mixture (for example, concentrating the purest and freshest flavors from a blood orange by removing the water); 2. to extract the volatile aroma and flavor molecules from mixtures gently and at ...

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