Patent ID: 6461482
Filing Date: 2002-10-08
Classification: C07C,Y10S

Abstract:
A process for preparing purified phytantriol, consisting of:rectifying phytantriol which is contaminated with lower and/or higher boiling byproducts under medium vacuum in columns containing metal cloth packings with ordered structure, and carrying out the rectification in a mass transfer column, wherein a) liquid distribution is carried out by channel distributors with a minimum of 500 drip points per m2, b) the channels of the liquid distributors are arranged at an angle of about 90Â° to the cloth layers of the packing elements located directly below these distributors, c) 2 or more packing elements which have a height of 20 to 100 mm and whose cloth layers are each rotated by 90Â° relative to one another are located below the liquid distributors, d) air is virtually excluded during operation, and e) the rectification is carried out adiabatically.