Process for production of sorbents for uptake of liquids

US5450817A · kind A · utility

Assignee

• Sud Chemie, Inc. · US

Inventors

• Reinhard Hahn · Vilsheim, DE
• Norbert Schall · Langenpreising, DE
• Rolf Ahlers · Landshut, DE
• Otto Haubensak · Brannenburg, DE
• Max Eisgruber · Bruckberg, DE

Key dates

• Filing date: Dec 20, 1993
• Grant date: Sep 19, 1995
• Expiry date: Dec 20, 2013

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J20/12
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A process for the production of sorbents based on bentonite for the uptake of liquids is described. The process is characterized in that a poorly swelling bentonite with a water uptake capacity of less than 100% (in terms of the dried bentonite with a residual water content of 6 wt. %), a montmorillonite content of around 40-65 wt. % and a water content of 20-40 wt. % is homogenized with a basic-reacting alkaline metal compound by thorough kneading and converted by ion exchange to a swelling bentonite, while the pH value of the mixture is not more than 10.5, the mixture is gently dried, and the dried mixture is fragmented.