Patent · US Expired

Process for removing noxious substances containing fluorine and/or sulfur from gaseous or liquid media

US4450777A · kind A · utility

14Cited by

10References

6Claims

0Family size

Assignee

Rheinische Braunkohlenwerke AG · DE

Inventors

Erhard Wolfrum · Hillesheim, DE
Manfred Erken · Bergheim, DE
Dietrich Bocker · Münstermaifeld, DE

Key dates

Filing date	Apr 27, 1983
Grant date	May 29, 1984
Priority date	—
Expiry date	Apr 27, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S210/915
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process is provided for removing noxious pollutants containing sulfur and/or fluorine compounds from gaseous or liquid media by adsorption of the compounds on coke. The coke is produced by conventional processes from lignite (brown coal) containing alkaline ash compounds, particularly CaO and MgO as well as possibly Na.sub.2 O, Al.sub.2 O.sub.3 and K.sub.2 O. The coke with adsorbed sulfur and/or fluorine pollutants is incinerated at temperatures selected from 700.degree. C. and 1050.degree. C. such that the pollutants combine chemically with the alkaline ash compounds so that the pollutants become bound in the coke ash rather than being emitted to the environment in the combustion gases.

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