Patent · US Expired

Process for producing sorbents based on smectites to absorb liquids

US5648306A · kind A · utility

18Cited by

8References

18Claims

0Family size

Assignee

Sud Chemie, Inc. · US

Inventors

Reinhard Hahn · Vilsheim, DE
Otto Haubensak · Brannenburg, DE
Max Eisgruber · Bruckberg, DE

Key dates

Filing date	Oct 2, 1995
Grant date	Jul 15, 1997
Priority date	—
Expiry date	Oct 2, 2015

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2220/46
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for producing sorbents based on smectites for absorbing liquids is described. This process is characterized in that a) a smectite with a water content of less than 6% by weight; b) a wet mass of fibrous cellulose and inorganic pigments which forms in the treatment of waste water from paper manufacture; and c) anhydrous calcium sulfate (anhydrite) or calcium sulfate hemihydrate are mixed with one another, compressed and crushed. The quantitative ratio between the smectite (a), the wet mass (b) and calcium sulfate (c) are selected such that the water content (free water) of the granular material is less than 20% by weight.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.