Abstract A method of manufacturing a distilling bubble plate column to be used in various laboratory techniques. The column is made from a plain glass tube which is successively and locally preheated, whereupon it is shaped by means of a shaping mandrel inserted step by step thereinto to build alternating bottlenecks and broad sections thereon, said bottlenecks serving as saddles for centrally perforated column trays providing each with a drain pipe for off downward flow of the liquid through the column while vapors pass the column in the counterflow direction through portions between the inner column wall and the edge of said loosely located trays which are out of contact with each other.
A column as defined in claim 1, wherein each of said plates has a central upwardly projecting portion in which said central opening is formed and each of said downcomer pipes being curved so that the lower end thereof is laterally spaced from said upwardly projecting central portion of the next lower plate and located downwardly of the upper surface of the upwardly projecting portion of said next lower plate to provide a liquid seal preventing upward passage of the vapors through said pipe.
Claim 2
Dependent Claim
77 words
A column as defined in claim 1, wherein each downcomer pipe extends substantially coaxial to said tube and including a bowl-shaped member connected to the free end portion of each pipe, said bowl-shaped member having a peripherAl wall spaced at least in part from the outer surface of said pipe and a bottom wall spaced from the free end of the latter so as to provide a liquid seal preventing upward passage of vapors through said pipe.