Title page for ETD etd-07102010-020030

Type of Document Dissertation
Author Coli, Guido John Jr.
URN etd-07102010-020030
Title The design, construction, and operation of a centrifugal molecular still
Degree PhD
Department Chemical Engineering
Advisory Committee
Advisor Name Title
Vilbrandt, Frank C. Committee Chair
Murphy, Nelson F. Committee Member
O'Shaughnessy, Louis Committee Member
  • Molecular.
  • Distillation
Date of Defense 1949-05-15
Availability unrestricted
Molecular distillation is distillation carried out in a sufficiently high vacuum such that the distance which molecules leaving an evaporator my travel, before being condensed, is comparable to the mean free path of the vapor molecules residual gas. The use of high vacuum thus provides the vapor molecules with an unobstructed path from the evaporator to condenser by removal of noncondensable gasses and greatly lowers the temperature at which distillation will occur...

There are two main types of molecular stills reported in the literature, the falling film and centrifugal. In their present state of development only the latter has sufficient capacity to warrant application on a commercial scale. In essence, this still consists of a heated rotating disk which distributes the fluid in a thin film across its surface by centrifugal force, and an adjacent cooler surface for collecting the vaporized molecules, the entire apparatus being enclosed in a highly evacuated container.

The purpose of this investigation was: (1) to construct a centrifugal molecular still having replacable rotating disks of varying sizes…; (2) to operate the molecular still and collect sufficient data to verify that this still had operating characteristics comparable to those reported in the literature; (3) to ascertain the effect of each of the variables listed on the operating characteristics of the still.

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