Name: Soxhlet Extraction apparatus with coiled condenser
SKU: 398202
Price: 68.55 EUR
Availability: InStock

Soxhlet Extraction apparatus with coiled condenser

A Soxhlet extractor is a piece of laboratory apparatus invented in 1879 by Franz von Soxhlet. It was originally designed for the extraction of a lipid from a solid material. Typically, Soxhlet extraction is used when the desired compound has a limited solubility in a solvent, and the impurity is insoluble in that solvent. It allows for unmonitored and unmanaged operation while efficiently recycling a small amount of solvent to dissolve a larger amount of material.

Assembly

The source material containing the compound to be extracted is placed inside the thimble.
The thimble is loaded into the main chamber of the Soxhlet extractor.
The extraction solvent to be used is placed in a distillation flask.
The flask is placed on the heating element.
The Soxhlet extractor is placed atop the flask.
A reflux condenser is placed atop the extractor.

High quality borosilicate glass

The Distillation apparatus meets the following characteristics:

ACCURACY

Controlled calibration
mechanical strength
Thick walls
All glassware has been annealed

HEAT RESISTANCE

Refractory material
Annealing to remove stress due to heating

CHEMICAL RESISTANCE

Resistance to corrosion by acids, bases and organic solvents
Low alkalinity

Distillation is the method by which a liquid at a specific boiling point is isolated from a mixture.

Operation

The solvent is heated to reflux. The solvent vapour travels up a distillation arm, and floods into the chamber housing the thimble of solid. The condenser ensures that any solvent vapour cools, and drips back down into the chamber housing the solid material. The chamber containing the solid material slowly fills with warm solvent. Some of the desired compound dissolves in the warm solvent. When the Soxhlet chamber is almost full, the chamber is emptied by the siphon. The solvent is returned to the distillation flask. The thimble ensures that the rapid motion of the solvent does not transport any solid material to the still pot. This cycle may be allowed to repeat many times, over hours or days.

During each cycle, a portion of the non-volatile compound dissolves in the solvent. After many cycles the desired compound is concentrated in the distillation flask. The advantage of this system is that instead of many portions of warm solvent being passed through the sample, just one batch of solvent is recycled.

After extraction the solvent is removed, typically by means of a rotary evaporator, yielding the extracted compound. The non-soluble portion of the extracted solid remains in the thimble, and is usually discarded.

Soxhlet Extraction apparatus with coiled condenser - why.gr