Improvements in the Treatment of Tar Oils for Use as Wood- Preserving Paints or Coatings.
Year: 1888

page_text: Date of Application, 18th May, 1888
.Complete Specification Left, 18th Feb., 1889
Complete Specification Accepted, 23rd Mar., 1889
Improvements in the Treatment of Tar Oils for Use as Wood-
Preserving Paints or Coatings. .
I, RICHARD AVENARIUS of the firm of Gebrüder Avenarius of Ganalgesheim on
the Rhine, Germany, Manufacturer, do hereby declare the nature of this invention to
be as follows:-
This invention relates to the treatment of tar oils for use as anti-septic or
preservative paint (carbolineum) for wood, and has for its object to increase the
viscidity and drying quality, raise the point of ignition and the specific gravity,
increase the antiseptic property, diminish the distillate and remove the fluoresence and
evil odor of such paint.
A paint for impregnating and preserving wood should be sufficiently viscid to
avoid running off the wood and should readily adhere' in sufficient quantity thereto; it
should permit of being heated without danger, that is to say, should only give off
inflammable vapors at comparatively high temperatures ; it should not cause fluorésence
of the color which it imparts to the wood, and even when heated and in use it should
not emit dissagreeable' odors!
The invention consists in subjecting the tar oil to the action of chlorine vapors.
For this purpose the tar oil, in a slightly warmed condition, is run into a cylinder into
which the chlorine vapors are also conducted, the cylinder being provided with
stirrers whereby the oil is agitated to expose a large surface to the action of the
chlorine vapors. The chlorine as it is generated collected in a gas holder and
thence forced into the mixing cylinder, the excess escaping and being collected for
use again.
By the action of the chlorine the antiseptic property of the carbolineum thus
treated is greatly increased whilst the dissagreeable odor peculiar to crude carbolineum
and due to the presence of sulphuretted hydrogen is replaced by an agreeable one.
The specific gravity, viscidity and drying quality are increased and a varnish like
lustre is imparted to the paint. The fluoresence disappears and the chloridized
carbolineum shows the chestnut brown shade which it imparts to the wood on which
it is applied.

page_text: Improvements in the Treatment of Tar Oils for Use as Wood-
preserving Paints or Coatings.
I, RICHARD AVENARIUS, of the firm of Gebrüder Avenarius, of Ganalgesheim
on the Rhine, Germany, Manufacturer, 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 the treatment of tar oils for use as antiseptic or
preservative paint (carbolineum) for wood; and has for its object to increase the
viscidity and drying quality, raise the point of ignition and the specific gravity,
increase the antiseptic property, diminish the distillate, and remove the fluorescence
and evil odor of such paint.
A paint for impregnating and preserving wood should be sufficiently viscid to
avoid running off the wood, and should readily adhere in sufficient quantity thereto;
it should permit of being heated without danger, that is to say should only give off
inflammable vapors at comparatively high temperatures; it would not cause
fluorescence of the color which it imparts to the wood, and evon when heated and in use
it should not emit disagreeable odors.
The Invention consists in subjecting the tar oil to the action of chlorine gas. For
this purpose the tar oil, as manufactured for use and in a slightly warmed condition,
is run into a cylinder into which the chlorine is also conducted, the cylinder being
provided with stirrers whereby the oil is agitated to expose a largo surface to the
action of the chlorine vapors. The chlorine, as it is generated, is collected in a lead
gas holder, and thence forced into the mixing cylinder, the excess escaping and being
collected for use again.
The following comparative analysis of samples of crude and chloridized carbo-
lineum exemplifies the advantages of this process of treatment.

page_text: By the action of the chlorine, the antiseptic property of the carbolineum thus
treated is greatly increased whilst the disagrecable odor peculiar to crude
carbolineum and due to the presence of sulphuretted hydrogen is replaced by an
agreeable one. The specific gravity, viscidity, and drying quality, are increased and
a varnish-like lustre is imparted to the paint. The Huorescence disappears and the
chloridized carbolineum shews the chestnut brown shade which it imparts to the wood
on which it is applied.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
The treatment of heavy tar oils for use as antiseptic wood paint (carbolinoum)
with chlorine gas for the purpose of increasing the viscosity, drying and antiseptic
qualities, and of raising the point of ignition, and the specific gravity, diminishing
the distillate and removing the fluorescence and evil odor, as specified.
Dated this 18th day of February 1509.
R. AVENARIUS.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.
R. AVENARIUS.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.