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
BRANDTECH™ VITLAB™ PFA Round Bottom Flasks
Corrosion- and leach-resistant flasks excellent for rotary evaporation and distillation of high-purity chemicals
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™ 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
United Scientific™ Borosilicate Glass Distilling Flask
Distilling Flasks ideal for distillation applications.
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™ 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™ Round Bottom 3 Parallel Necks Distilling Flask
High quality borosilicate 3.3 glass round bottom distilling flask with three parallel necks
Supertek™ Clear Glass Distillation Flasks with Enameled Area for Marking
These reusable Clear Glass Distillation Flasks come with an Enameled Area for Marking.
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™ 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.
Chemglass Life Sciences 125mL 3-Neck European Flask, Jacketed, 1-CN 24/40 Outer, 2-SN 14/20 Outer Angled 20°
125mL 3-Neck European Flask, Jacketed, 1-CN 24/40 Outer, 2-SN 14/20 Outer Angled 20¿. European style flask with tapered walls and a shallow hemispherical bottom for more efficient mechanical or magnetic stirring. Entire body of the flask is jacketed and has two hose connections for circulation of heating or cooling liquid. With standard taper outer joints on center and side necks.
Chemglass Life Sciences 125mL 3-Neck European Flask, Jacketed, 1-CN 14/20 Outer, 2-SN 14/20 Outer Angled 20°
125mL 3-Neck European Flask, Jacketed, 1-CN 14/20 Outer, 2-SN 14/20 Outer Angled 20¿. European style flask with tapered walls and a shallow hemispherical bottom for more efficient mechanical or magnetic stirring. Entire body of the flask is jacketed and has two hose connections for circulation of heating or cooling liquid. With standard taper outer joints on center and side necks.
Chemglass Life Sciences 125mL 3-Neck European Flask, 1-CN 24/40 Outer, 2-SN 14/20 Outer Angled 20°
125mL 3-Neck European Flask, 1-CN 24/40 Outer, 2-SN 14/20 Outer Angled 20¿. European style flask with tapered walls and a shallow hemispherical bottom for more efficient mechanical or magnetic stirring. With standard taper outer joints on center and side necks.