Improvements in Treating Paraffin Scale.
Year: 1894

page_text: Date of Application, 18th June, 1894
Complete Specification Left, 15th Mar.. 1895-Accepted. 27th Apr.,
1895
PROVISIONAL SPECIFICATION.
Improvements in Treating Paraffin Scale.
We, JOHN CALDERWOOD, Managing Director of Price's Patent Candle Co. Ld.
of Belmont Works, Battersea, in the County of Surrey, and Joux HODGES,.
of 15 Hafer Road, Battersea aforesaid, Paraffin Refiner, do hereby declare the
nature of this invention to be as follows:-
The object of this invention is to secure the separation from the paraffin scale of
the greater part of the oil usually present therein. Melted scale is allowed to
cool slowly in a vessel provided with an internal steam pipe or pipes. When the
harder senle has solidified, steam, hot water, hot air or other fluid is passed through
the internal pipes and the core of soft scale and oil flows away through a tap or
valve in the bottom of the vessel.
To still further purify the remaining hard scale, steam, hot water or other fluid
is passed into a jacketied space with which the vessel is provided the oily portion
being allowed to pass away as before; or the vessel itself may be placed in a room
the temperature of which can be regulated.
Dated this 16th day of June 1894.
JOHN CALDERWOOD.
JOHN HODGES.
Improvements in Treating Paraffin Scale.
We, JOHN CALDERWOOD, Managing Director of Price's Patent Candle Co. Ltd.,.
of Belmont Works, Battersen, in the County of Surrey, and JOHN HODGES,
of 15 Haler Road, Battersea aforesaid, Paraffin Refiner, 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 object of this invention is to secure the separation from the paraffin scale of
the oil or of the greater part thereof usually present therein. Melted scale is
allowed to cool slowly in a vessel provided with an internal steam pipe or pipes.
When the harder scale has solidified, steam, hot water, hot air or other fluid is
passed through the internal pipes and the core of soft scale and oil flows away
through a tap or valve in the bottom of the vessel.
To still further purify the remaining hard scale, steam, hot water or other fluid
is passed into a jacketted space with which the vessel is provided the oily portion.
being allowed to pass away as before; or the vessel itself may be placed in a room
the temperature of which can be regulated.
In carrying out our invention we prefer to use a vessel of cylindrical form.
Figure is a plan and Figure 2 a sectional elevation of a vesse! of this
description. The melted scale is delivered into the space a and allowed to cool
slowly. When the scale has solidified sufficiently steam, hot water or other heating
agent is passed through the internal pipe and the oil and soft paraffin which
exude from the scale are carried away at the tape in the bottom of the vessel.
To still further purify the remaining harder scale, steam hot water or other
heating agent is passed into the external jacketted space d the oily portion being

page_text: allowed to pass away as before, or the vessel itself may be placed in a room the
temperature of which can be regulated.
Instead of these operations being consecutive they inny be made concurrent, the
steam, hot water or other heating fluid being allowed to circulate through both
spaces at one and the same time.
Figures 3 and 4 show a modified form of cylindrical vessel which may be
employed. In this vessel the melted scale is delivered into a series of concentric
spaces with intervening or alternate spaces in which steam, hot water or other fluid
is made to circulate.
We do not confine ourselves to vessels of cylindrical form and Figures 5 and 6
show a vessel of rectangular form which may be employed for our purpose, the
spaces being those into which the melted scale is delivered, the heating fluid
circulating in the spaces b and the oil being carried away from the bottom by the
taps c. The compartments instead of being vertical as shown may be inclined.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The method of freeing or purifying paraffin scale from the oil usually present
therein by melting it, allowing it to cool slowly, partially reheating it and separating
the liquid portions substantially as described.
2. The method of freeing or purifying paraffin from the oil usually present
therein by melting it, allowing it to cool slowly partially relenting it from the
middle and separating the liquid portions substantially as described.
Dated this 9th day of March 1895.
JOHN CALDERWOOD.
JOHN HODGES.