Improvements in the Process of Manufacture of Artificial Asphalt.
Year: 1896

page_text: Date of Application, 17th Feb.. 1896
Complete Specification Loft 16th Nov 1806 Accented
47L
L
100
PROVISIONAL SPECIFICATION.
Improvements in the Process of Manufacture of Artificial Asphalt.
We, ALBERT HANNEMANN, of Beusselstrasse 51, and GEORGE BOISLY of
Siegmundshof 8 both of Berlin in the Empire of Germany, Engineer, and retired
Captain, respectively, do hereby declare the nature of this invention to be as
follows:-
The preparation of artificial asphalt from coal pitch or from the remains of
resin and petroleum distillations by heating them with sulphur and subsequently
adding burnt or unburnt lime or other crystalline stone, has not hitherto produced
a material capable of withstanding great pressure.
This invention relates to the manufacture of artificial asphalt produced by
treating black or brown coal-pitch, the remains of the resin or petroleum distillation,
first with sulphur, then with chloride of lime, or first with chloride of lime and then
with sulphur, the product being ground and mixed with amorphous lime, slag, or
other kind of stone, or saw-dust and again heated to boiling point.
Experiments have shown that, a material superior to natural asphalt is produced
by treating the pitch before or after heating it with sulphur. with more or less
chloride of lime at the smelting temperature of the pitch. The quantity of the
chloride of lime is fixed by experiments generally 2 to 6% being sufficient. The
product is then mixed with amorphous lime, slag or other stone of amorphous
structure or with saw-dust.
Dated this 17th day of Februar 1900
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents to Applicants.
Improvements in the Process of Manufacture of Artificial Asphalt.
We, ALBERT HANNEMANN, Engineer, of Beusselstrasse 51, and GEORGE
BOISLY, retired Captain, of Siegmundshof 8, both in Berlin in the Empire of
Germany, 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 :-
The preparation of artificial asphalt from coal pitch or from the remains of resin
and petroleum distillations by heating them with sulphur and subsequently adding
burnt or unburnt lime or other crystalline stone has not hitherto produced a
material capable of withstanding great pressure.
This invention relates to the manufacture of artificial asphalt produced by
treating black or brown coal pitch, or the remains of resin or petroleum distillation
first with sulphur, then with chloride of lime, or first with chloride of lime and then
with sulphur, the product being ground and mixed with amorphous lime, slag or
other kind of stone or saw-dust and again heated to boiling point.

page_text: Experiments have shown that a material superior to natural asphalt is produced
by treating the pitch before or after heating it with sulphur, with more or less
chloride of lime at the smelting temperature of the pitch. The quantity of the
chloride of lime is fixed by experiments, generally two to six per cent. being
sufficient. The product is then mixed with amorphous lime, slag or other stone of
amorphous structure or with saw-dust.
The artificial asphalt is produced by heating gas-tar, produced from black or
brown coal or the tar produced in the manufacture of coke or the residuum of
petroleum distillation or the residuum of the resin distillation, sufficiently to drive
off by volatilization the light oils, and then after the temperature has gone back to
100° Celsius, about ten parts of sulphur and 3 parts of chloride of lime to 100 parts
by weight of the tar.
The bitumen thus obtained is mixed with the following filling material in a warm
state in a mixing machine in the following proportions:-
About 15% bitumen.
then powdered kind of stone or saw-dust).
The powder-like product thus obtained is dried or torrified and treated like the
compressed asphalt by stamping, or placed in moulds and compressed, and it can
be used directly for the street pavements in this state for instance in the form of
bricks.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The manufacture of artificial asphalt produced by treating pitch or the remains
of resin or petroleum distillation first with sulphur then with chloride of lime, or
first with chloride of lime and then with sulphur, the product being ground and
mixed with amorphous lime, slag or other stone or saw-dust and again heated to
boiling point.
Doted this 16th day of November 1896.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents to Applicants.