Abstract: Modified Trass material has an enlarged active surface compared to native Trass. A method of preparation of the Modified Trass includes contacting Trass with an agent capable to dissolve away components in the Trass, and removing the dissolved components from the Trass. The modified Tass can be used for removing substances from fluids, in particular from exhaust gases of combustion plants.
Type:
Grant
Filed:
June 21, 2013
Date of Patent:
March 21, 2017
Assignee:
FTU GmbH Forschung und Technische Entwicklung im Umweitschutz
Inventors:
Konrad Fichtel, Michael Fichtel, Roland Fichtel
Abstract: An enhanced calcium hydroxide, a process for its manufacture and a process for its use in the removal of volatile heavy metals from a gas is disclosed.
Type:
Grant
Filed:
February 8, 1994
Date of Patent:
April 8, 1997
Assignee:
FTU GmbH Technische Entwicklung und Forschung im Umweltschutz
Abstract: A composition for separating out volatile pollutants from gases and exhaust gases consists of calcium hydroxide and water-soluble salts of sulfur-containing compounds, e.g., mercaptans, sulfides, polysulfides, polythionates and thiosulfates, or elementary sulfur which are used in combination with surface-active substances.Possible ways to produce the composition include adding the sulfur-containing compounds to the quicklime during slaking, to the slaking water, or, subsequent to slaking, to calcium hydroxide.The compositions are used for removing the volatile heavy metals, particularly mercury, arsenic, cadmium, thallium, antimony and lead, at temperatures ranging from 20.degree. to 400.degree. C. For this purpose, the composition is blown as powder into the exhaust gas stream, and the resultant products are separated out at fabric filters. Upon addition of surface-active substances, volatile organic pollutants are removed simultaneously with the aforementioned inorganic pollutants.
Abstract: An enhanced calcium hydroxide, a process for its manufacture and a process for its use in the removal of volatile heavy metals from a gas is disclosed.
Type:
Grant
Filed:
December 2, 1991
Date of Patent:
April 26, 1994
Assignee:
FTU GmbH Technische Entwicklung und Forschung Im Umweltschutz
Abstract: A composition for separating out volatile pollutants from gases and exhaust gases consists of calcium hydroxide and water-soluble salts of sulfur-containing compounds, e.g., mercaptans, sulfides, polysulfides, polythionates and thiosulfates, or elementary sulfur which are used in combination with surface-active substances.Possible ways to produce the composition include adding the sulfur-containing compounds to the quicklime during slaking, to the slaking water, or, subsequent to slaking, to calcium hydroxide.The compositions are used for removing the volatile heavy metals, particularly mercury, arsenic, cadmium, thallium, antimony and lead, at temperatures ranging from 20.degree. to 400.degree. C. For this purpose, the composition is blown as powder into the exhaust gas stream, and the resultant products are separated out at fabric filters. Upon addition of surface-active substances, volatile organic pollutants are removed simultaneously with the aforementioned inorganic pollutants.