Search results
Results from the WOW.Com Content Network
A fractionating column or fractional column is equipment used in the distillation of liquid mixtures to separate the mixture into its component parts, or fractions, based on their differences in volatility. Fractionating columns are used in small-scale laboratory distillations as well as large-scale industrial distillations.
Typical industrial fractional distillation columns. Fractional distillation is the most common form of separation technology used in petroleum refineries, petrochemical and chemical plants, natural gas processing and cryogenic air separation plants. [3] [4] In most cases, the distillation is operated at a continuous steady state. New feed is ...
Fractionation is widely employed in many branches of science and technology. Mixtures of liquids and gasses are separated by fractional distillation by difference in boiling point. Fractionation of components also takes place in column chromatography by a difference in affinity between stationary phase and the mobile phase.
A column still is an example of a fractional distillation, in that it yields a narrow fraction of the distillable components. This technique is frequently employed in chemical synthesis; in this case, the component of the still responsible for the separation is a fractionating column.
Spinning band distillation takes this concept one step further by using a spinning helical band made of an inert material such as metal or Teflon to push the rising vapors and descending condensate to the sides of the column, coming into close contact with each other. This speeds up equilibration and provides for a greater number of ...
A packed column is a condenser used in fractional distillation. Its main component is a tube filled with small objects to increase the surface area and the number of theoretical plates . The tube can be the inner conduit of some other type, such as Liebig or Allhin. [ 3 ]
The man confessed that he knew better than to leave a dirty cup in a common area, but it had slipped his mind. He said he regretted having lied about it when caught. Hamm went in for the kill. He turned to the whiteboard where another addict was recording all the group’s concerns, listing the proposed punishments in increasingly crowded columns.
Another example of vapor and liquid contact devices are the spikes in laboratory Vigreux fractionating columns. The trays or plates used in industrial distillation columns are fabricated of circular steel plates and usually installed inside the column at intervals of about 60 to 75 cm (24 to 30 inches) up the height of the column.