Filtering Materials and Method of Manufacturing the same.
Year: 1899

page_text: Date of Application, 28th Oct., 1899
Complete Specification Left, 25th June, 1900-Accepted, 4th Aug.,
1900
PROVISIONAL SPECIFICATION.
Filtering Materials and Method of Manufacturing the same.
I, EDUARD BITTER VON RITTERSHAUSEN, of Kagrau, near Vienna, in the Empire
of Austria, Director of the Filter Factory "Delphin," do hereby declare the
nature of this invention to be as follows.-
This invention relates to the manufacture of filtering materials consisting of
porous artificial silicates, and has for its object to provide a filtering material
of this class, which can with certainty be produced with any desired degree
of porosity
Hitherto, decomposed or naturally disintegrated stones of the older forma-
tions have been used for manufacturing such silicates, and consequently imper-
vious portions were often found in the slabs thus prepared
Now, according to this invention, an undecomposed stone, uz: syenite 18
employed This is ground to a fine powder, which is moistened with water
and compressed in iron or other suitable moulds The resulting slabs or bodies
are baked at a temperature of from 1000° to 1200° Celsius
In some cases, a small quantity of chalk is added to the powdered syenite
1000
Filtering Materials and Method of Manufacturing the same.
I, EDUARD BITTER VON RITTERSHAUSEN, of Kagrau, near Vienna, in the Empe
of Austria, Director of the Filter Factory "Delphin," do hereby declare the
nature of this invention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement that
is to say.
This invention relates to the manufacture of filtering materiala consisting of
porous artificial silicates, and it has for its object to provide a filtering material
of this class, which can with certainty, be produced with any desired degree
of porosity, even so as to be suitable for eliminating bacteria from liquids
Hitherto, decomposed or naturally disintegrated stones of the older forma-
tions have been used for manufacturing such silicates, or granules of ground
quartz were cemented together by means of silicates, and consequently imper-
vious portions were often found the slabs thus prepared

page_text: Now, according to this invention, an undecomposed stone, viz., syenite, is
employed This is ground to a fine powder, which 18 moistened with water
and compressed in iron or other suitable moulds The resulting slabs, "candles,"
or hollow bodies, are baked at a temperature of from 1000° to 1200° Celsius
and the particles are thus caused to adhere superficially.
Owing to the chemical nature of the syenite, coherent bodies can be obtained
by the baking operation without the addition of a cement, and the porosity of
the product is due to the fact that the fracture of the mineral 18 hackly and that
consequently the particles obtained by ginding it have sharp edges
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that
what I claim 18.--
1 A filtering material in the form of slabs, "candles," or the like, composed
of particles of syenite that have been caused to adhere together superficially
by baking, substantially as described
2. The process of manufacturing a filtering material, which consists in grind-
ing syenite, moistening the resulting powder with water, pressing it into moulds,
and baking the product after removal from the moulds, substantially as des-
cribed.
Dated this 25th day of June, 1900
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, & бA, Market Street, Nottingham,
Agent for the Applicant