Cloth or cloth-like packing which is subject to low pressure losses and has an ordered structure for use in material-exchange columns and rectification method using such packing

US5950454A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfram Burst · Mannheim, DE
• Horst Hartmann · Dresden, DE
• Wulf Kaiser · Bad Dürkheim, DE
• Harald Laas · Frankenthal (Pfalz), DE
• Paul Grafen · Bad Dürkheim, DE
• Bernhard Bockstiegel · Wasserburg am Inn, DE
• Kai-Uwe Baldenius · Ludwigshafen, DE

Key dates

• Filing date: Jan 7, 1998
• Grant date: Sep 14, 1999
• Expiry date: Jan 7, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S62/906
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Packing elements with a low pressure drop for mass transfer column internals of the internal diameter of the column and of a height of from 40 to 300 mm made of dimensionally stable layers, which have an ordered structure and are in mutual contact, of cloth material or cloth-like material with a specific surface area of from 100 to 2000 m.sup.2 /m.sup.3, wherein PA1 a) the shaped layers of cloth material or cloth-like material, preferably made of metal cloth, which are in mutual contact are arranged so that they form a multiplicity of narrow flow channels, preferably virtually triangular, virtually rectangular or else virtually equilateral hexagonal flow channels, in which the angle of inclination of the serration of the individual cloth layers of the packing to the column axis is only 0 to 25.degree., preferably 3 to 14.degree., and PA1 b) to ensure mechanical stability of the packing elements, if necessary wires or thin rods are fixed in suitable arrangement between the cloth layers, or else the cloth layers are firmly connected at some points of contact, and processes for obtaining pure substances from substance mixtures by rectification using the novel packing elements.