Patent · US Expired

Method of making pellets usable as aggregate or filler

US4064212A · kind A · utility

8Cited by

2References

1Claims

0Family size

Assignee

STEAG GmbH · DE

Inventors

Ulrich Kleeberg
Jurgen Leimkuhler
Jurgen Knospe
Manfred Stohr · Veitshöchheim, DE

Key dates

Filing date	Jul 7, 1975
Grant date	Dec 20, 1977
Priority date	—
Expiry date	Jul 7, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/91
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Waste gas from a coal-fired power plant is scrubbed with a lime-water mixture to form a sludge whose water content is reduced and which is mixed with a binder such as water glass. This mixture is then pelletized to produce hard water-stable material suitable for use as an aggregate or filler. The waste gas may be stripped of its fly ash and this ash added to the sludge to thicken it.

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