Abstract: A construction material mixture used as a concrete additive contains a puzzolanic substrate and a photocatalyst. The puzzolanic substrate and the photocatalyst are available in the form of a dry mixture. The construction material mixture is a cement free dry mixture, wherein the photocatalyst has a primary particle size of between 2 nm and 100 nm. The puzzolanic substrate consists of at least 90 weight % of fly ash with a grain size of between 0.1 ?m and 1 mm. The substrate and the photocatalyst are available completely mixed so that the photocatalyst is at least partially distributed on the surface of the substrate.
Type:
Grant
Filed:
November 15, 2012
Date of Patent:
March 29, 2016
Assignees:
Steag Power Minerals GmbH, Kronos International, Inc.
Inventors:
Werner Krohm, Jürgen Bender, Christian Scheidt
Abstract: A construction material mixture used as a concrete additive contains a puzzolanic substrate and a photocatalyst. The puzzolanic substrate and the photocatalyst are available in the form of a dry mixture. The construction material mixture is a cement free dry mixture, wherein the photocatalyst has a primary particle size of between 2 nm and 100 nm. The puzzolanic substrate consists of at least 90 weight % of fly ash with a grain size of between 0.1 ?m and 1 mm. The substrate and the photocatalyst are available completely mixed so that the photocatalyst is at least partially distributed on the surface of the substrate.
Type:
Application
Filed:
November 15, 2012
Publication date:
November 6, 2014
Applicants:
KRONOS INTERNATIONAL, INC., STEAG POWER MINERALS GMBH
Inventors:
Werner Krohm, Jurgen Bender, Christian Scheidt
Abstract: A method for separating a particle mixture into a first and second fraction, the first fraction of particles having an electrical conductivity greater than the particles of the second fraction, by a) ionizing air to have the same polarity with a corona electrode; b) mixing the ionized air with a fluidized particle mixture containing two particle fractions with different electrical conductivities, to obtain a fluidized particle mixture ionized to have the same polarity; d) precipitating particles of the second fraction from the particle mixture on a collection electrode moving relative to the particle mixture, where the collection electrode is grounded or has an opposite charge to the corona electrode; e) removing particles adhered to the collection electrode as the second fraction; and f) obtaining the first fraction from particles of the particle mixture which do not adhere to the collection electrode.
Type:
Application
Filed:
June 30, 2011
Publication date:
July 11, 2013
Applicants:
STEAG POWER MINERALS GmbH, Evonik Degussa GmbH
Inventors:
Senada Schaack, Nicola Benscheidt, Frank Borchers, Matthias Berghahn, Stefan Nordhoff, Patrik Stenner