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How to use a Rotary Evaporator

How to use a Rotary Evaporator

Apr 01, 2010 Some solvents (such as diethyl ether or dichloromethane) are so volatile that they will also evaporate from the receiving flask and be discharged down the drain. To prevent this, a cooling bath on the receiver or (on some models) use a dry-ice condenser can be used.

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Synthesis of Diethyl Adipate - West Virginia University

Synthesis of Diethyl Adipate - West Virginia University

Combine the ether extracts and remove dissolved water by drying with solid sodium sulfate or magnesium sulfate until the solution appears clear. Remove the drying agent by suction filtration, wash the drying agent with a small amount of ether, add this to the extracts, and evaporate the ether on the rotary evaporator with heat from the steam bath.

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Experimental Section General -

Experimental Section General -

Concentrated in vacuo as used in the experimental section refers to rotary evaporation using a B chi rotavapor. Polyethylene glycol monobenzyl ether MW 600 (3a). To a suspension of potassium hydride (580 mg, 14.5 mmol, 1.06 eq.) in degassed THF (125 mL) was added 2-benzyloxyethanol 2 (2.09 g, 13.7 mmol, 1 eq) and stirred for 4 h. The solution was

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60-29-7 CAS DIETHYL ETHER High Purity Solvents

60-29-7 CAS DIETHYL ETHER High Purity Solvents

DIETHYL ETHER DIETHYL ETHER AR (Stabilized) Store at +15 to +25C Ethoxyethane. Article No. 00104. Grade ... Evaporation rate 37.5 Vapour pressure [20C] …

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Diethyl Ether - HPLC Grade 1L - Price Match Assurance

Diethyl Ether - HPLC Grade 1L - Price Match Assurance

Diethyl Ether – HPLC Grade, 1L. SKU: C990G03. $ 102.00. Diethyl Ether is an organic compound in the ether class. This solvent is a colorless and highly volatile liquid. It’s a great, non-polar solvent for liquid-liquid extraction. It has a lower density than water, so it floats on top.

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Ether (C2H5)2O - PubChem

Ether (C2H5)2O - PubChem

Ether | (C2H5)2O or C4H10O | CID 3283 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...

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General Rules for Using A Rotary Evaporator - GWSI

General Rules for Using A Rotary Evaporator - GWSI

General Rules for Using A Rotary Evaporator. 1. The collecting flask should always be emptied before use to prevent accidentally mixing of incompatible chemicals. SAFETY FIRST! 2. The flask should be lowered into the water bath (or the water bath should be raised to immerse the flask in the warm water. (On most models, a convenient handle (with ...

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Working with Hazardous Chemicals

Working with Hazardous Chemicals

Jul 13, 2020 portions are then extracted with diethyl ether (3 x 100 mL). The combined organic portions are dried over 10 g of anhydrous Na 2SO 4, filtered, and concentrated by rotary evaporator (25 C, 100 mmHg, then 60 mmHg) to afford a dark brown oil. The crude product is charged onto a column (75 mm x 300 mm) packed with 200 g SiO

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To Grease or Not to Grease Blog

To Grease or Not to Grease Blog

May 04, 2017 To Grease or Not to Grease. Generally, it is not recommended to grease the ground glass joint holding your flask when using a rotary evaporator. Organic solvents that are commonly being evaporated readily dissolve silicone based grease causing it to end up in the product. The likelihood of grease contamination varies per type of solvent.

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Peroxide Explosion Injures Campus Researcher

Peroxide Explosion Injures Campus Researcher

Nov 30, 2006 The researcher was using a rotary evaporator (rotovap) to remove organic solvents from an azobenzene precipitate. She adjusted the bottom flask which then exploded sending glass towards her face, hitting her safety goggles and forehead. ... Both tetrahydrofuran (THF) and diethyl ether were used in the reaction, and both of these solvents form ...

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APPENDIX 7 : How to use the rotary evaporator

APPENDIX 7 : How to use the rotary evaporator

Remember that the rotary evaporator evaporates solvent, but it is not an efficient apparatus for drying solids. Similarly, if your residue in the flask is an oil, it will be almost ... Diethyl ether 35 C −42 C Ethanol 78 C 7 C Ethyl acetate 77 C –7 C …

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Rotary Evaporation Archives - Lab Pump Finder

Rotary Evaporation Archives - Lab Pump Finder

Rotary Evaporation. Enter the solvent you will be using. Not Sure Acetic acid 100% Acetone Acetonitrile n-Amyl alcohol Benzene n-Butanol tert-Butanol 2-Butanone Butyl acetate Carbon tetrachloride Chlorobenzene Chloroform Cyclohexane 1,2-Dichloroethane cis-1,2-Dichloroethylene trans-1,2-Dichloroethylene Dichloromethane Diethylamine Diethyl ether ...

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rotary evaporator distillation: operation steps of rotary evaporator evaporation ...

rotary evaporator distillation: operation steps of rotary evaporator evaporation ...

Rotary evaporator is an ideal instrument necessary for the concentration, drying and recycling relied on by the chemical industry, pharmaceutical industry, foods, environmental protection, universities and colleges, and research laboratories and so on, and especially adaptable to the small scale production unit.

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Peroxide Forming Solvents - University of Utah

Peroxide Forming Solvents - University of Utah

rotary evaporator to remove THF and diethyl ether from an azobenzene precipitate. •THF and diethyl ether form peroxides over time •She adjusted the bottom flask which then exploded sending glass towards her face, hitting her safety goggles and forehead. •Concentrated peroxides in the round bottom were shock sensitive

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Title: Rotary Evaporator Page 1 of 6 ROTARY EVAPORATOR

Title: Rotary Evaporator Page 1 of 6 ROTARY EVAPORATOR

Rotary evaporators (also called rotavaps or rotovaps) are used to remove solvents from reaction mixtures. Liquid solvents can be removed without excessive heating of the sample by lowering the ... Diethyl Ether 60-29-7 35 -40 IA 2, 4, 0 extremely flamm. liquid and vapor Ethanol 64-17-5 78 14 IB 2, 3, 0 highly flammable liquid and vapor ...

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Heidolph Instruments : Solvent data

Heidolph Instruments : Solvent data

Rotary Evaporators Large-Scale Rotary Evaporators Automatic Module Hei-VOLUME Distimatic Magnetic Stirrers Overhead Stirrers Shakers Mixers Peristaltic Pumps Processing Solutions ... Diethyl ether. C 4 H 10 O: 34.6: 850: Dimethylformamide. C 3 H 7 NO: 153.0: 11: 1,4-Dioxane. C 4 H 8 O 2: 101.1: 107: Ethanol. C 2 H 6 O: 78.4: 175: Ethyl ...

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Solved answer choices are Positive or Negative for the first

Solved answer choices are Positive or Negative for the first

The dichloromethane extracts were dried with sodium sulfate, filtered, and concentrated on a rotary evaporator to provide Oil B. Oil A should have a [Select] ferric chloride test and a [Select ] permanganate test. Oil B should have a [Select] ferric chloride test and a [Select ] permanganate test.

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PEER-REVIEWED ARTICLE bioresources - NCSU

PEER-REVIEWED ARTICLE bioresources - NCSU

The diethyl ether soluble oil (DESO) was obtained by removing the diethyl ether in a rotary evaporator. Characterization The bio-oil mixture was washed with diethyl ether and dichloromethane mixtures (90:10, v/v) and the diethyl ether-soluble fraction of the bio-oil was analyzed by GC-MS. PEER-REVIEWED ARTICLE

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Methods of Plant Extraction and Isolation

Methods of Plant Extraction and Isolation

The extracts were obtained by maceration of dry plant material (50 g) with diethyl ether for 48 h at room temperature with continuous agitation. The ratio used in the extraction process was (1 g sample with 12 mL of solvent). Extract solutions were filtered with filter paper and then collected and concentrated using a rotary evaporator at 35-55 C

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The Rotary Evaporator

The Rotary Evaporator

The Rotary Evaporator It is commonly taught in General Chemistry classes that the vapor pressure of a liquid or solid varies directly with temperature, i.e., the higher the temperature of a substance, the higher its ... cases, when you are removing a very volatile solvent such as diethyl ether or dichloromethane, this is essential. 8. The steps ...

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Lab Quiz 2 Flashcards Quizlet

Lab Quiz 2 Flashcards Quizlet

When rotating a mixture of diethyl ether and ethanol: A. ethanol will be evaporated first because of its polarity B. the most concentrated one evaporates first ... Rotary evaporator is an instrument used in laboratories for: A. purification B. distillation at atmospheric pressure

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