Fractioning columns

Named condensers were done, and Vigreux was identified. Now it is time for us to spend some time on other named fractioning columns.

Dufton column - Samuel Felix Dufton (1867–1943)

Hempel column - Walther Mathias Hempel (1851-1916)

Holzman column - George Holzman
Distillation Equipment Suitable for Centigram and Decigram Quantities; Anal. Chem. 1948, 20, 361

Stedman column - Donald Frank Stedman (1900-1967)

Column with special packing, used for industrial distillation.GB451014
US2227164

Widmer column - Gustav Widmer Über die fraktionierte Destillation kleiner Substanzmengen; Helv. Chim. Act. 1924, 7, 59

Oldershaw column - C.F. Oldershaw

Perforated Plate Columns for Analytical Batch Distillations; Ind. Eng. Chem. Anal. Ed. 1941, 265

Snyder Column - not yet identified