Jepson Bolton's International Catalogue
Transparent Kugelrohr distillation oven BuchiKugelrohr Distillation is particularly suited to the distillation of small amounts of liquids (20mg or more) and also the high vacuum distillation of high-boiling oils (up to 209) because of the very short distillation path. For fractionation, the boiling points should be about 20C to 30C apart; when multi-bulb tubes are used, the distillation can be repeatedly carried out in the same tube.
The oven consists of two borosilicate glass tubes mounted on a support which carries the iris-type closure. The inner tube is heated by means of a surface-coated electrically conductive layer and a temperature sensor controls the surface temperature so that residues in the bulbs will not rise above the indicated temperature. The outer tube acts as a heat insulator and as a guard for the hot inner tube.
The Kugelrohr bulb tubes are held in a support which has a vacuum stopcock and includes an electric drive unit which rotates the ball tube at 15rpm. This support is free to slide along a guide rail to enable the bulb tube to be inserted or removed from the oven. The control module provides an On/Off switch with indicator lights for power and heaters, a switch for the ball tube drive, temperature selection knob and analogue temoerature disolav.
There are two types of Kugelrohr tubes consisting of a train of five fixed bulbs or of separate bulbs connected by ground-glass joints with a jointed tube at one end. During distillations all the bulbs, except that nearest the tube end, are slid into the oven. After distillation/ fractionation the individual bulbs may be cut off or separated.
Temperature range 30 to 250C Oven interior dimensions lxdia 200 x 50mm Iris diaphragm aperture 5 to 50mm (lockable) Drive unit speed 15 rpm Dimensions lxwxh 300 x 330 x 300mm Weight 7kg Electrical requirements 240V 400W 50Hz
Accessories and sparesD56-170 - Kugelrohr tube, 5 bulbs one piece Bulb diameter 1 x 30mm,4 x 25mm - £15.70
D56-175 - Kugelrohr tube, jointed, 3 bulbs and shaft Bulb diameter 45mm - £98.70
D56-180 - Kugelrohr tube, jointed, 4 bulbs and shaft Bulb diameter 35mm - £120.80
D56-320 - Ice cooling device - £91.40
D56-322 - Drying tube assembly - £222.60
D56-330 - Cover hood for drying tube - £120.80
D56-335 - Vacuum connection - £58.80
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