The Manufacture of an improved Artincial Asphalte.
Year: 1898

page_text: Date of Application, 2nd Apr., 1898
Complete Specification Left, 27th Dec., 1898-Accepted, 11th Mar., 1899
The Manufacture of an improved Artincial Asphalte.
We, RICHARD WOLFERS, Manufacturer, of 4, Brückenallée, and ALBERT
HANNEMANN, Engineer, of 51, Beusselstrasse, both of Berlin, in the German
Empire, do hereby declare the nature of this invention to be as follows:-
This invention relates to a process for the manufacture of an improved artificial
asphalte (termed "technolith") in which the residues from the distillation of
tar, petroleum or resin are employed.
According to this process, these residues are mixed with sulphur and an
oxidizing agent, such for example, as pyrolusite or brownstone, chloride of lime,
or oxide of manganese, etc. and heated. The bituminous product so obtained
is then, according to the present invention, in order to obtain a road-making
material which similar or at least equal to the natural asphalte, incorporated,
in a warm state, with the filling material to be employed, such for example, as
lime-like, clay-containing materials, slag sand, saw dust, kieselguhr etc., in a
mixing machine; in this mixture, however, slaked lime, preferably in the form
of milk of lime, is simultaneously employed. From this material, "technolith,"
by employing a high pressure, stones or blocks of great durability and tenacity,
can be moulded, which can be very advantageously employed as paving material
(paving-stones, slabs). This product can also be employed in the form of
powder, as powder or "liquid" asphalte. It is advantageous to adapt this
material to the particular climate by the addition of powdery natural bitumen
(e.g. Trinidad épuré) in about the proportion of 5 to 10 per cent.; in warm
climates more natural bitumen is added than in cold climates.
"6
It is advantageous to separately mix the slaked lime with the filling material,
whereupon this mixture, since the lime was used in the form of milk of lime,
is dried after setting; this product is then ground and added to the still warm
artificial bitumen in large quantity, for example, in the proportion of ten-times
the quantity of artificial bitumen.
1000

page_text: Empire, 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:
This invention relates to a process for the manufacture of an improved artificial
asphalte (termed "technolith") in which the residues from the distillation of
tar, petroleum or resin are employed.
According to this process, these residues are mixed with sulphur and an
oxidizing agent, such for example, as pyrolusite or brownstone, chloride of lime,
or oxide of manganese, etc. and heated. The relative proportions may advan-
tageously be as follows:-About 10 parts by weight of sulphur and about 3 parts
by weight of oxidizing agent or agents may be added to 100 parts by weight of
the petroleum residue, etc. The bituminous product so obtained is then, accord-
ing to the present invention, in order to obtain a road-making material which is
similar or at least equal to the natural asphalte, incorporated, in a warm state,
with the filling material to be employed, such for example, as lime-like, clay-
containing materials, slag sand, saw-dust, kieselguhr, etc., in a mixing machine;
in this mixture, however, slaked lime, preferably in the form of milk of lime,
is simultaneously employed. From this material, "technolith," by employing
a high pressure, stones or blocks of great durability and tenacity can be made
by moulding, which can be very advantageously employed as paving material
(paving-stones or slabs). This product in the form of powder can also be either
employed as powder" asphalte or formed into "liquid" asphalte. It is advan
tageous to adapt this material to the particular climate by the addition of
powdery natural bitumen (e.g. Trinidad épuré) in about the proportion of 5.
to 10 per cent.; in warm climates more natural bitumen is added than in cold'
climates.
"
It is advantageous to separately mix the slaked lime with the filling material,
whereupon this mixture, since the lime was used in the form of milk of lime,
is dried after setting; this product is then ground and added to the still warm
artificial bitumen in large quantity, for example, in the proportion of ten times:
the quantity of artificial bitumen."
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:.
1. The manufacture of artificial asphalte (technolith) by a process in which
artificial bituminous material obtained by heating the residues of the distillation
of tar, petroleum or resin together with sulphur and an oxidizing agent, are
mixed, in a warm condition, with a filling material previously treated with
slaked lime, and this product in a ground condition, or with the addition of
ground natural bitumen, is moulded under a high pressure to form blocks, stones
or slabs, or can be employed as "powder" or "liquid" asphalte.
2. Artificial asphalte (technolith) manufactured substantially as herein before
described.