What is a Dean Stark trap used for?
The Dean–Stark apparatus, Dean–Stark receiver, distilling trap, or Dean–Stark Head is a piece of laboratory glassware used in synthetic chemistry to collect water (or occasionally other liquid) from a reactor.
Why is one arm of the Dean Stark usually insulated with aluminum foil?
As with standard Dean–Stark technique, it is best to insulate the reac- tion vessel and addition funnel side arm with cotton and alu- minum foil so as to maximize reflux efficiency.
When should you start timing the reflux for the procedure?
If following a procedure in which you are to reflux for a certain time period (e.g. “reflux for one hour”), the time period should begin when the solution is not just boiling but actively refluxing in the bottom third of the condenser.
How do you dry DCE?
Dichloromethane (DCM) and dichloroethane (DCE) were dried by refluxing over CaH2 under N2(g). N-methylpyrrolidinone (NMP) and ethanol were used as commercially supplied (anhydrous/reagent grade). Petroleum spirit (PS, 40-60°C fraction), n-hexane and water (H2O) were purified by distillation.
Is there a manual version of the Dean Stark apparatus?
Manual and automatic versions are available. While the Dean Stark Apparatus is not on the cutting edge of new technology it is important to get a system that is well thought out and proven to work. DCI’s Dean stark apparatuses are composed of quality glass and designed with efficiency in mind. The graduated cylinder is accurate and precise.
What is the purpose of the Dean Stark trap?
A Dean-Stark trap is a specialized piece of glassware used for continuously removing water formed in a chemical reaction. This video will illustrate the principles of the Dean-Stark trap, a laboratory procedure in which the apparatus is used, and several applications.
Why is reflux necessary in the Dean Stark apparatus?
It is the co-produced water that prevents a high yield of product being obtained. The removal of the water is necessary to drive the reaction to completion and this is done using Dean-Stark apparatus. The reaction is carried out under reflux in a solvent which is less dense than water to form an azeotrope.
How does the DCI Dean Stark distillation process work?
The distillation process cleans a sample removing all hydrocarbons and water from the sample. The DCI Dean Stark apparatus can be configured for different size core samples and graduated cylinder sizes. The saturator can be configured with different size saturation chambers to fit odd size or large quantities of core samples.