Process for preparing high-purity phytantriol

US6461482B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Harald Streicher · Ludwigshafen, DE
• Wolfram Burst · Mannheim, DE
• Jürgen Däuwel · Heidelberg, DE
• Jürgen Koppenhöfer · Meckenheim, DE

Key dates

• Filing date: Jan 27, 2000
• Grant date: Oct 8, 2002
• Expiry date: Jan 27, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/11
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing high-purity phytantriol, that includes rectifying the phytantriol which is obtained and is contaminated with lower and/or higher boiling byproducts under medium vacuum in rectification columns containing metal cloth packings with ordered structure using channel liquid distributors with a minimum of 500 drip points/m2, which are arranged at an angle of 90° to the cloth layers of the packing elements located directly below the distributors, in which 2 or more of the packing elements underneath the liquid distributors have only a small height, which ensure absolute exclusion of air and a strictly adiabatic procedure.The preparation of high-purity phytantriol takes place particularly advantageously when the phytantriol which is contaminated with byproducts is a phytantriol which has been obtained by reacting isophytol with performic acid and subsequently hydrolyzing the product formed in the reaction with alkaline agents in a manner known per se.