Distilling Flasks
Distilling flasks are used to separate mixtures of two liquids with different boiling points. A variety of designs and capacities are available to accommodate distillation processes of varying complexities. Flask design typically features a distillation column in the form of a long neck, a side arm that facilitates condensation, and a round bottom for uniform heat distribution. For complex distillations, flasks with two or more necks that allow for connection to multiple components are available. Neck joints come in a variety of sizes, orientations, and joint types. Distilling flasks are manufactured from heat and chemical resistant materials, such as borosilicate glass or PFA.
Distilling flasks, also known as distillation flasks, are types of laboratory flasks forming part of larger distillation assemblies used for the separation and/or purification of liquids or liquid mixtures where the components have different boiling points. Distillation flasks are used to contain and heat the liquid(s) that require purification. They are round-bottomed for uniform heat distribution, with a stoppered or jointed neck of variable length, to which is attached a downward-sloping, inclined side-arm for connection to a condensing unit or similar component to cool the heated vapors back down to their liquid state. For complex distillations, flasks with two or more necks that allow for connection to multiple components are available.
Distilling flasks are usually made of a high-quality glass, such as borosilicate, for heat and chemical resistance and for reusability. Heating mantles are the preferred heat source for improved temperature control and for safety reasons, but direct flame heat sources are also used. Immersion thermometers can also be introduced into the neck of the flasks to monitor the temperature of the distillation process.
Distilling flasks are available in a range of capacities, and the neck joints come in a variety of sizes, orientations, and joint types.
What are distillation flasks used for?
- Separation and purification of miscible liquid mixtures in organic chemistry
- Drying off solid residues and/or solvent removal
- Distilling off liquids from polymers and petroleum products
- Removal of particulates or other solid contaminants
- As part of a water purification system for production of distilled water for laboratory use
Synthware™ Schlenk Flasks, Modified, with PTFE Stopcock
Kjeldahl shape to facilitate heating and stirring
Synthware™ Schlenk Flasks, Modified, with Glass Stopcock
Kjeldahl shape to facilitate heating and stirring
Synthware™ Schlenk Flasks, Modified, with High Vacuum Valve
Kjeldahl shape to facilitate heating and stirring
Eisco™ Glass Two-Neck Distillation Flask
Glass two-neck distillation flask features one oblique neck, screw threading in both necks, and standard socket size. Made with high quality borosilicate 3.3 glass, durable with low temperature gradient. Flask connects firmly to other glassware with the help of screw thread joints.
Eisco™ Round Bottom Distillation Flasks with Side Arm
High quality borosilicate 3.3 glass round bottom distillation flasks with integral side arms
Corning™ PYREX™ Distilling Flasks
Round bottoms, vial mouths, with side arms at 75° angle
Eisco™ Glass Round Bottom Distilling Flasks with Oblique Neck
Round bottom distilling flasks made from high quality borosilicate glass. Designed with 1 oblique jointed neck as per DIN12383 standard. Autoclavable.
Eisco™ Glass Three Neck Distillation Flasks
Eisco™ Glass Three Neck Distillation Flasks with screw threads at the neck, which allows the flasks to connect firmly with other glassware.
Eisco™ Round Bottom Distilling Flask with 3 Oblique Necks
High quality borosilicate 3.3 glass available in a variety of center and side socket sizes.
Eisco™ Round Bottom 3 Parallel Necks Distilling Flask
High quality borosilicate 3.3 glass round bottom distilling flask with three parallel necks
United Scientific™ Borosilicate Glass Distilling Flask
Distilling Flasks ideal for distillation applications.
Supertek™ Clear Glass Distillation Flasks with Enameled Area for Marking
These reusable Clear Glass Distillation Flasks come with an Enameled Area for Marking.
Petroleum Analyzer Corporation Flask, Distillation, 200ml (Pack of 2)
Flask, Distillation, 200ml (Pack of 2)
DC Scientific Glass 125 mL Quartz Distillation Flask, ASTM D86 Application, Automated Analyzer Compatible
The DC Scientific Glass DCP-0086-006 is a 125 mL quartz distillation flask designed for ASTM D86 distillation analyses. Its high-quality quartz construction ensures superior thermal stability and chemical resistance, making it ideal for accurately distilling petroleum products. Compatible with automated D86 distillation analyzers, especially the OptiDist, this flask delivers reliable and reproducible results, differentiating it from other flasks in laboratory settings.
