Our Products

Rotary Evaporator

Laboratory equipment

Jacketed Reactor

Contact Us

We Cherish All Interactions

2018 New Customized Lowest Price Rotary Evaporator With .

2018 New Customized Lowest Price Rotary Evaporator With .

2018 New Customized Lowest Price Rotary Evaporator With Chiller And Vacuum Pump Price, Find Complete Details about 2018 New Customized Lowest Price Rotary Evaporator With Chiller And Vacuum Pump Price,50 Liter Rotary Evaporator,50 Liter Rotovap Dichloromethane,Vertical Condenser Rotary Evaporator For Sale from Evaporator Supplier or Manufacturer-Nantong Sanjing Chemglass Co., Ltd.

Standard Operating Procedure

Standard Operating Procedure

Methylene chloride (also known as dichloromethane) (CH 2 Cl 2). Chemical Abstracts Service (CAS) 75-09-2 2. Department: All laboratories 3. . (ROTOVAP) to remove methylene chloride or any halogenated solvents. This prevents halogenated solvents from entering the water supply and also helps prolong the life of the vacuum aspirator.

How to use a Rotary Evaporator

How to use a Rotary Evaporator

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 .

Extraction of Caffeine From Tea Leaves

Extraction of Caffeine From Tea Leaves

Highlighted Concepts Components of Tea Leaves Cellulose – the major structural material of all plants Caffeine – one of the major water-soluble substances present in tea leaves Tannins – high molecular weight, water-soluble compounds that are responsible for the color of tea Flavonoid pigments – a naturally occurring water-soluble phenolic compound

Extraction and Washing Guide - MIT OpenCourseWare

Extraction and Washing Guide - MIT OpenCourseWare

10) Concentrate the solution on the rotovap then dissolve the compound in a small amount of solvent and transfer to a small pre-weighed (tared) flask. 11) Concentrate the solution on the rotovap again. Higher boiling solvents are more effectively removed by concentrating, adding dichloromethane then repeating once more.

EXTRACTION OF CAFFEINE FROM TEA

EXTRACTION OF CAFFEINE FROM TEA

dichloromethane and also pour this rinse through the funnel. Add a boiling stick or boiling chip to the flask containing the dichloromethane solution so that it boils without bumping Evaporate the dichloromethane on a steam bath or water bath heated on a hot plate in a hood. Alternatively, the dichloromethane may be removed by

Extraction and Determination of a Distribution Coefficient .

Extraction and Determination of a Distribution Coefficient .

Jul 19, 2011 · The purpose of this lab is to calculate the K d of benzoic acid in dichloromethane. . (RB flask) and place it on the rotary evaporator ("rotovap"). The rotovap works by lowering the pressure inside your round-bottom flask, allowing the a solvent to boil off at room temperature. After the ether boils away you are left with solid compound A.

The Rotary Evaporator

The Rotary Evaporator

dichloromethane and methanol illustrate this phenomenon: Vapor Pressure (torr) 1 10 40 100 400 760 CH2Cl2 T oC -70 -43 -22 -6 24 41 CH3OH . We take advantage of this in our use of the rotary evaporator or rotovap. The diagram below is a generic rotary evaporator. The essential parts are shown. The rotary evaporator is used for

Yamato Scientific | Rotary Evaporator RE500/540

Yamato Scientific | Rotary Evaporator RE500/540

This aspirator prevents discharge of dichloromethane, chloromethane, etc. This device extracts the organic solvent substances from gas generated by a rotary evaporator during concen tration work, and prevents the discharge of dangerous matter.

analytical chemistry - Does a rotary evaporator need a .

analytical chemistry - Does a rotary evaporator need a .

You can use a rotovap without a vacuum pump but for this to work you need to leave it open, otherwise possible overpressure from your DCM vapors will do this for you by shooting the stop cock out of the joint. Having little bit of underpressure even for solvents like diethyl ether and DCM is the way to do it, so you definitely want to have a pump.

Diazepam (Valium) Synthesis

Diazepam (Valium) Synthesis

Rotovap off the dichloromethane (dryness in the flask, end (60 °C, 20 torr). Dissolve 400 g hexamethylene tetramine (urotropine) in 3 l ethanol, and add to the chloroacetylated residue. Reflux and stirr 24 h (all organic material is dissolved) and then evapotate to dryness.

PIMODIVIR, VX 787 – Drug Approvals International

PIMODIVIR, VX 787 – Drug Approvals International

Dec 08, 2016 · Product that "bumped" was rinsed back into the flask with dichloromethane. The solution was concentrated to approx. 50 mL and hexane (35 mL) was added. The solution was then concentrated to approx. 50 mL. The slurry was vacuum filtered and the solids were washed with cold hexane, then dried by rotovap, to afford 4.7 g (88.7% of product.

Sciencemadness Discussion Board - Concentration of organic .

Sciencemadness Discussion Board - Concentration of organic .

Oct 03, 2019 · Concentration of organic phase without rotovap? After separation and washing, the non-polar organic phase remains as a hydrochloride solved in dichloromethane. Since we do not have access to a rotovap, I wonder how it could be concentrated? Someone suggested simply magnetic stirring (evaporation of DCM over time) which should leave the crude .

Increase your distillation efficiency

Increase your distillation efficiency

Dichloromethane, methylene chloride CH 2 Cl 2 699 Diethylether C 4 H 10 O 838 trans-1,2-Dichloroethylene C 2 H 2 Cl 2 317 Diisopropylether C 6 H 14 O 251 Dioxane C 4 H 8 O 2 68 Dimethylformamide (DMF) C 3 H 7 NO 6 Ethanol C 2 H 6 O 97 Ethylacetate C 4 H 8 O 2 153 Heptane C 7 H 16 77 Hexane C 6 H 14 264 Isopropyl alcohol C 3 H 8 O 78 Isoamyl .

Performing a Trituration - Common Organic Chemistry

Performing a Trituration - Common Organic Chemistry

Concentrate the mixture on the rotovap until most of the solids have crashed out. Filter the solids. Usually a buchner funnel will be used. Wash the filter cake with a minimum amount of solvent. Use a solvent mixture/ratio which is higher in ratio of anti-solvent:solvent than the initial solvent mixture used to dissolve your impure pdt.

Rotary Evaporator Ethanol Extraction - Coldfinger .

Rotary Evaporator Ethanol Extraction - Coldfinger .

Oct 11, 2019 · Hence, with this assembly, it is also possible to completely condense extremely volatile and low-boiling solvents such as chloroform or dichloromethane. You can fill the cold trap not only with common freezing mixtures such as dry ice/acetone ( .

Solvent Boiling Points Chart

Solvent Boiling Points Chart

Solvent Boiling Points Chart (all boiling points at standard pressure) Solvent Boiling Point (°C) Solvent Boiling Point (°C) Acetic Acid 118.0 Ethyl Acetate 77.1 Acetic Acid Anhydride 139.0 Ethyl Ether 34.6 Acetone 56.3 Ethylene Dichloride 83.5 Acetonitrile 81.6 Ethylene Glycol 197.5 Benzene 80.1 Heptane 98.4 iso-Butanol 107.7 n-Hexane 68.7 n-Butanol 117.7 Hydrochloric Acid 84.8 tert-Butanol .

Solved: The Combined Dichloromethane Layers Were Extracted .

Solved: The Combined Dichloromethane Layers Were Extracted .

The instructor will rotovap this fraction (crude oils #1) and take an IR spectrum, and this solution can be used for TLC analysis Separate Eugenol from Other Essential Oils by Extraction with Aqueous Base Take the remaining 4/5 of your dichloromethane solution and add it to your 125 mL separatory funnel.

The dark side of dichloromethane - DCM - Azerbaijan .

The dark side of dichloromethane - DCM - Azerbaijan .

Jul 25, 2017 · Dichloromethane (DCM) is a fantastically useful solvent. It can dissolve a huge variety of compounds;whisk them through chromatography columns; and then Rotovap away in .

Laboratory Rotary Evaporation Solutions - Lab Instrument .

Laboratory Rotary Evaporation Solutions - Lab Instrument .

The main components of a rotary evaporator or "rotovap" include a motor unit, a vapor duct, a vacuum system, a heated fluid bath, a condenser with either a coil passing coolant, or a "cold finger, a condensate-collecting flask and a mechanical or motorized mechanism. . Some solvents (such as diethyl ether or dichloromethane) are so .

How to Deal with Solvent Bumping and Foaming During Lab .

How to Deal with Solvent Bumping and Foaming During Lab .

Bumping and foaming are problems that commonly arise during evaporation and can lead to sample loss and contamination. As Jim Dawson, president of Heidolph North America (Elk Grove Village, IL), explains, the primary culprits are applying "too much heat, too much rotational speed, or too much vacuum" to a particular application.

Chem 331L Final Flashcards | Quizlet

Chem 331L Final Flashcards | Quizlet

Start studying Chem 331L Final. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Extraction of Lycopene from Tomato paste Flashcards | Quizlet

Extraction of Lycopene from Tomato paste Flashcards | Quizlet

Start studying Extraction of Lycopene from Tomato paste. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Types of Solvent Evaporators - An Overview | BioChromato

Types of Solvent Evaporators - An Overview | BioChromato

Jul 30, 2018 · A rotary evaporator (rotovap) works by placing the sample under vacuum thereby lowering the boiling point of the solvent. Typically, a round bottom flask is used where it is lowered in a heated water bath. The flask is rotated to increase the surface area and provide an even transfer of heat.

Solvent Removal - Organic Chemistry

Solvent Removal - Organic Chemistry

The motor in the rotovap turns the flask rapidly, providing a greater surface from which evaporation can occur and speeding up the process. Cooling coils in the rotovap condense the vapors and drop them into a collection flask so that they can be recycled or properly disposed. The roto-vap is connected to a vacuum source, and again, this speeds .

Extraction of Caffeine From Tea Leaves

Extraction of Caffeine From Tea Leaves

Highlighted Concepts Components of Tea Leaves Cellulose – the major structural material of all plants Caffeine – one of the major water-soluble substances present in tea leaves Tannins – high molecular weight, water-soluble compounds that are responsible for the color of tea Flavonoid pigments – a naturally occurring water-soluble phenolic compound

The most certain indicators of complete water removal will .

The most certain indicators of complete water removal will .

Your instructor may either help you remove the solvent using a piece of laboratory equipment called the rotovap or will have you perform a simple distillation to remove the dichloromethane from the round bottom flask. If you perform a simple distillation, the heat source will be a thremowell with an initial rheostat setting of 30.

The dark side of dichloromethane | Opinion | Chemistry World

The dark side of dichloromethane | Opinion | Chemistry World

Dichloromethane (DCM) is a fantastically useful solvent. It can dissolve a huge variety of compounds; whisk them through chromatography columns; and then Rotovap away in a trice. Yet it also has a dark side. DCM has raised health concerns for years: the US Environmental Protection Agency judges it a 'probable human carcinogen', for example.

Essay about Extraction of Eugenol from Cloves Oil - 994 .

Essay about Extraction of Eugenol from Cloves Oil - 994 .

Finally, you will isolate the acetyleugenol by using a rotovap for reduced pressure distillation, which will remove the organic solvent (dichloromethane). Background Whole cloves contain between 14% and 20% by weight of essential oils, but only half of that can be isolated as acetyleugenol.

The most certain indicators of complete water removal will .

The most certain indicators of complete water removal will .

Your instructor may either help you remove the solvent using a piece of laboratory equipment called the rotovap or will have you perform a simple distillation to remove the dichloromethane from the round bottom flask. If you perform a simple distillation, the heat source will be a thremowell with an initial rheostat setting of 30.