Patent · US Expired

Method of making a leach resistant fixation product of harmful water-containing waste and cement

US4533395A · kind A · utility

4Cited by

9References

9Claims

0Family size

Assignee

Kernforschungszentrum Karlsruhe GmbH · DE

Inventors

Peter Vejmelka · Leopoldshafen, DE
Wolfgang Kluger
Rainer Koster · Karlsruhe, DE
Wolfgang Hauser · Blankenloch, DE

Key dates

Filing date	Jan 13, 1984
Grant date	Aug 6, 1985
Priority date	—
Expiry date	Jan 13, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/91
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A solid fixation product of harmful, water-containing waste materials and cement, which product is highly resistant to leaching by water and salt solutions. The product has a high content of 20 to 50% of waste materials based on the dry weight of the waste in the product and a water content corresponding to a water-to-cement ratio of 0.2 to 0.45. The method according to the invention which permits producing of such products is characterized in that evaporation of the water-containing waste materials and the mixing with the fixation matrix takes place concurrently at temperatures of 100.degree. to 180.degree. C. The resulting solid fixation product is of relatively small volume and, accordingly, requires only relatively little storage space.

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