Get a Quote
Sciencemadness Discussion Board - External heating for bath to allow ...

Sciencemadness Discussion Board - External heating for bath to allow ...

Dec 07, 2020 A friend is doing 5L reactions with distillation as I type with a 5L heating mantle and a variac, they are working well at 120 C or so (takes about 58 volts to get there). You always want to heat those size flasks slowly and gently, so start at 20 V and slowly ramp it up by 10 volts at a time, as you watch the temp.

More details
Distillation of Safrole - [www.rhodium.ws] - mdma

Distillation of Safrole - [www.rhodium.ws] - mdma

Essential oil that contains safrole (Chinese or Brazilian Sassafras, Brown Camphor etc.) Complete ground-glass jointed vacuum fractional distillation setup. * ... One simple method for heating the oil has the clamped flask sitting on an electric heating mantle that is controlled by a variac. The heating mantle rests on a stirrer (or a hot plate ...

More details
CHEM C2507y Spring 2000 - Columbia University

CHEM C2507y Spring 2000 - Columbia University

First, label four 10-mL graduated cylinders as forerun, number 1, number 2, and number 3. Use the forerun graduated cylinder initially to collect the forerun. Heat the mixture in the round-bottomed flask gently with a heating mantle plugged directly into the Variac placed over a magnetic stirrer.

More details
Heating Mantle Disadvantages

Heating Mantle Disadvantages

heating mantle or in a water / oil bath over a heating plate, not touching the heating equipment to avoid over-heating during the distillation. All the glass jointware should be properly adjusted avoiding any vapour leakage, and the condenser must be properly fixed. After everything set up – figure SM 2.1.1.1 - make sure the temperature can be

More details
RT-100 Limit Controller Manual -

RT-100 Limit Controller Manual -

hexane and ethyl acetate in a distillation flask equipped with a heating mantle. The heating mantle plugs into a variac which is set at a power level great enough to cause a reasonable rate of distillation, then the variac is plugged into the RTU. Hexane boils at 69o C, so a set point of 70o C is entered into the J-KEM 3300. Since

More details
Free Essay: Distillation and Concentrated Sulfuric Acid

Free Essay: Distillation and Concentrated Sulfuric Acid

Sep 25, 2014 24 mL of 4-methylcyclohexanol, 5mL of phosphoric acid, and 1mL of concentrated sulfuric acid was added to a 250 mL round bottom flask and mixed thoroughly with a magnetic stirrer. A simple distillation set up was installed with a 250mL round bottom flask, jack, stirrer, heating mantle, and variac. The solution was heated gently with a small ...

More details
Organic Chemistry-lab final study guide Flashcards - Quizlet

Organic Chemistry-lab final study guide Flashcards - Quizlet

The are no switches or dials on the heating mantle, that is what the variac provides. what does the potassium carbonate sesquihydrate do. neutralizes the the distillate. 2 equal portions of dichloromethane are used to. ... if it contains a halogen it is more or less dense than water? more, without a halogen it is less dense and will be on top ...

More details
Oil Baths in Laboratories Environmental Health and Safety

Oil Baths in Laboratories Environmental Health and Safety

The electric heating coil (or oil bath on a hot plate) is controlled using a variable voltage controller (i.e., Variac). The voltage controller is adjusted to increase or decrease the temperature setting of the oil bath. Heating mantles should NEVER be plugged directly into an outlet. Comparison of Heating Assemblies

More details
Exp 3 - Distillation - F17

Exp 3 - Distillation - F17

The flask is situated into an appropriately sized heating mantle. The heating mantle should not be plugged directly into an outlet. The heating mantle should be plugged into a variable voltage controller (variac), which is then plugged into a wall outlet. Make sure the variac is turned down to zero initially. Do not plug the variac into an ...

More details
Temperature controller Water heating Electrothermal

Temperature controller Water heating Electrothermal

the use of Electrothermal heating mantles for heating inflammable liquids. The Electrothermal mantle consists of an insulated coil of resistance wire sewn in spiral form to a knitted glass fabric hemisphere which fits the flask to be heated. A thermocouple for measuring the temperature of the mat is sewn to the mantle.

More details
Model 210 210/Timer Manual - J-Kem Scientific

Model 210 210/Timer Manual - J-Kem Scientific

This manual contains parameters specific to temperature controller Serial #_____. When calling with a technical question, please have the controller’s serial number available. ... like a variac, if the reaction is heating too slowly or you need more power (e.g., heating to high temperatures), ... heating mantle yields stable temperature ...

More details
Model 270 Manual - J-Kem Scientific

Model 270 Manual - J-Kem Scientific

This manual contains parameters specific to temperature controller Serial #_____. When calling with a technical question, please have the controller’s serial number available. ... use with heating mantles fitted to round bottomed flasks running “typical” organic reactions (i.e., non- ... a variac, if the reaction is heating too slowly or ...

More details
Model 270 Manual

Model 270 Manual

This manual contains parameters specific to temperature controller Serial #_____. When calling with a technical question, please have the controller’s serial number available. ... variac, if the reaction is heating too slowly or you need more power (e.g., heating to high temperatures), give the ... tuned for heating mantles, using it with any ...

More details
Glassware and Equipment

Glassware and Equipment

You will also find a Variac or variable voltage supply unit at each of your work stations. These Variacs are usually attached to the racks by your work station and are to be used whenever you wish to control the power delivered to an apparatus, usually a heating mantle. Your instructor will demonstrate their use.

More details
Experiment 4: Purification of Liquids by Distillation

Experiment 4: Purification of Liquids by Distillation

you will use to heat the flask. 4. Your heating mantle has a separate cord – be sure to securely plug and twist the cord on, then slide the heating mantle under the round bottom flask and adjust the iron ring so the flask is snuggly nestled inside the mantle. Plug the heating mantle into the Variac (which should be set to “off” and a ...

More details
Related Post

Send Message to Us

48-hour idling test machine before leaving the factory. You can take the materials to the factory test machine. We will customize the solution according to your needs.

Get in Touch

Need more additional information or queries? We are here to help. Please fill in the form below to get in touch.

<script type="text/javascript" src="https://s4.cnzz.com/z_stat.php?id=1281088144&web_id=1281088144"></script>