Improvements in Refining or Purifying Sugar.
Year: 1892

page_text: Date of Application, 19th Feb., 1892,
Complete Specification Left, 10th Nov., 1892-Accepted, 10th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Refining or Purifying Sugar.
A communication from abroad by FRANZ PAETOW, of Jerusalemer Kirche 2,
Berlin, in the German Empire, Merchant.
I ALFRED GEORGE BROOKES of 55 & 56 Chancery Lane, in the County of
Middlesex, Chartered Patent Agent do hereby declare the nature of this inven-
tion to be as follows:-
All processes known to me in use until now for refining sugar consist in passing
the purifying substances through the sugar which is to be refined.
The consequence of this method has been until now to prevent uninterrupted or
continuous working.
According to my invention I therefore, pass the various quantities of sugar
through the purifying substances and thus render a continuous working possible.
For this purpose I use, for instance a vertical or other pipe of sufficient length,
to the lower end of which another pipe preferably (say) at about an angle of 35°,
is attached, and in the interior of which there is a conveying worm or conveyor
with a thread or inclined parts consisting of fine sieve material.
The vertical or other pipe in order to receive the sugar which requires refining
terminates in a funnel or receiver underneath which a narrower egress-pipe protected
by a sieve, is fixed.
14.
The mode of working consists in the pipe-arrangement being half filled with
pure sugar-solution, and then the sugar which requires refining being introduced
or shaken in at the ingress-pipe. If now the worm or conveyor is set in motion,
it then takes up the sugar and leads it on in a continuous manner, and in the same
way new sugar for refining is introduced or shaken into the ingress-pipe.
The sugar is thereby purified; at the same time the sugar solution previously
introduced is altered or modified in such a way that the syrup of a slightly greater
specific gravity is separated near the ingress-funnel, while the sugar-solution remains
all the better and is of smaller specific gravity the nearer it is to the upper end of
the worm or conveyor.
Pure sugar-solution is introduced through an appropriate ingress pipe provided
for it in proportion as the waste syrup is withdrawn from the purified mass
of sugar.
By these means I am enabled to effect purification of raw sugar and products
therefrom by a new and useful process whereby the bulk of the materials is led
continuously through sugar solutions of a moderate specific gravity.
Dated the 19th day of February 1892.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Refining or Purifying Sugar.
Í ALFRED GEORGE BROOKES of 55 & 56 Chancery Lane, in the County of
Middlesex Chartered Patent Agent (a communication to me from abroad by
Franz Paetow of Jerusalemer Kirche 2, Berlin, in the German Empire Merchant)
do hereby declare the nature of this invention and in what manner the same is to
D

page_text: be performed, to be particularly described and ascertained in and by the following
statement:-
All processes known to me in use until now for refining sugar consist in passing
the purifying substances through the sugar which is to be refined.
The consequence of this method has been until now to prevent uninterrupted or
continuous working.
According to my invention I therefore, pass the various quantities of sugar
through the purifying substances and thus render a continuous working possible.
For this purpose I use for instance a vertical or other pipe of sufficient length, to
the lower end of which another pipe preferably (say) at about an angle of 35°, is
attached, and in the interior of which there is a conveying worm or conveyor with
a thread or inclined parts consisting of fine sieve material.
The vertical or other pipe in order to receive the sugar which requires refining
terminates in a funnel or receiver underneath which a narrower egress-pipe protected
by a sieve, is fixed.
The mode of working consists in the pipe arrangement being half filled with pure
sugar-solution, and then the sugar which requires refining being introduced or
shaken in at the ingress-pipe.
If now the worm or conveyor is set in motion, it then takes up the sugar and
leads it on in a continuous manner, and in the same way new sugar for refining is
introduced or shaken into the ingress-pipe.
The sugar is thereby purified; at the same time the sugar solution previously
introduced is altered or modified in such a way that the syrup of a slightly greater
specific gravity is separated near the ingress-funnel, while the sugar solution remains
all the better and is of smaller specific gravity the nearer it is to the upper end of
the worm or conveyor.
Pure sugar solution is introduced through an appropriate ingress-pipe provided
for it in proportion as the waste syrup is withdrawn from the purified mass
of sugar.
By these means I am enabled to effect purification of raw sugar and products
therefrom by a new and useful process whereby the bulk of the materials is led
continuously through sugar solutions of a moderate specific gravity.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews by diagram a form of apparatus adapted for use in carrying the
invention into effect. A. B are two pipes of the same diameter; one of these in a
vertical position A. contains a stirring apparatus provided with wings placed cross-
wise, and forms the purifying apparatus itself.
The other pipe B in an inclined position connected with the lower part of the

page_text: sugar forward and brings it out at the top E permits a constant refilling of the
vertical pipe A with raw material.
If a pure sugar solution is allowed to continually flow through the additional
pipe connected with the inclined pipe B proportionately to the fresh quantity of
sugar added; treacle will flow out of the egress pipe a of the vertical pipe A,
while the spiral will throw out purified sugar at E and the vertical pipe A
will always contain a mixture of sugar and syrup, the purity of which will
decrease in proportion as it gets nearer to the egress-pipe a or to the introducing
funnel.
The three pipes with taps c, c, c are provided to enable the solution in pipe A to
be tested at various points. D and D¹ are respectively the gears for driving the
spirals A¹ and B¹.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.
The herein before described method of or process for the purification of raw
sugar and obtaining after products therefrom, whereby the bulk of the materials is
led continuously through sugar solutions of a moderate specific gravity.
Dated the 10th day of November 1892.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.