Improvements relating to the Crystallization of Sugar obtained from the Bye-products of Sugar Factories and to Apparatus therefor.
Year: 1899

page_text: Date of Application, 15th Aug., 1899
Complete Specification Left, 15th May, 1900-Accepted, 15th Aug., 1900
Improvements relating to the Crystallization of Sugar obtained from
the Bye-products of Sugar Factories and to Apparatus therefor.
We, LOUIS HAAS, of F8, Berliner Chaussée, Merchant, and AUGUST GRANTZ-
DORFFER, of Werder Kahnstrasse 1, Foreman-refiner, both of Magdeburg, in
the Empire of Germany, do hereby declare the nature of this invention to be
as follows:-
-
This process is for the purpose of causing sugar from the by-products, of the
filling mass in sugar manufactories to crystallize in a short time (within 16 to
24 hours) and thus form good material for the centrifugal apparatus.
This is effected by submitting the filling-mass boiled in the vacuum pans
to the grain or thread test, after removal therefrom, in a separate vessel where
it is well divided and mixed with carbonic acid, sulphurous acid or a gas of a
similar nature and then cooled. In no case however is air used. By the striking
of this mass upon a plate it cools and oblong bubbles are formed which, as is
well known, have an advantageous influence upon the crystallization. The mass
is then mixed with the gas by means of an appropriate apparatus. The crystals
formed tend to gravitate downwards by their own specific weight but are pre-
vented from so doing by the upwardly travelling gases and they can therefore
only slowly sink. In consequence hereof the crystals are surrounded uniformly
throughout the entire crystallization chamber by the same mother lye during
the entire period of crystallization. After having filled the crystallization
chamber with the filling mass, well treated with gas, it is at once artificially
cooled and to this end the apparatus is jacketted. Furthermore the carbonic-
acid pipe also assists in the cooling and is for this purpose provided with an inlet
socket through which cold air enters the pipe. During this time the gas bubbles
are drawn off by a natural draught (arranging for a high level outlet) and after
they have been entirely removed the mass is fully crystallized-out and is ready
for the centrifugal apparatus.
The apparatus for carrying out the said invention comprises a cylindrical
body fitted at the top with an inlet-pipe or passage through which flows the
filling mass from the vacuum pans. The mass then falls upon a dished shaped
plate and is thereby transformed into a thin liquid layer well intercepted with
oblong bubbles.
The plate is disposed above a funnel shaped piece of the carbonic-acid pipe
so that the carbonic acid is brought into intimate contact with the thin layer of
material and mixes therewith. It is advantageous to fill the crystallization
chamber with carbonic acid before entering the filling-mass and this is effected
through the inlet. To the inlet pipe is secured a long draw off pipe for creating
a natural draught in order to remove the bubbles from the mass and cool the
interior of the same by drawing cold air up the central pipe directly the
lower end thereof is opened.
After complete crystallization the mass is run out through the outlet pipe.
The process is exceedingly simple throughout

page_text: The boiled condensed mass is allowed to flow upon the dish-shaped plate in
such a manner as to overflow the edges thereof in a very thin layer.
Simultaneously therewith carbonic acid is let in at the lower end and thus
the mass is intimately mixed with this latter.
When the vessel is filled to the level of the funnel shaped piece the inlets for
the mass and for the carbonic acid are closed and the mass is then cooled thereby
allowing the gas-bubbles to escape in a natural manner. After about 16 to
24 hrs. the crystallization is terminated and the mass is ready for the centri-
fugal apparatus.
Dated this 15th day of Anonat 1800
HASELTINE LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.
Improvements relating to the Crystallization of Sugar obtained from
the Bye-products of Sugar Factories and to Apparatus therefor.
We, LOUIS HAAS, of 130, Berliner Chaussée, formerly of FS, Berliner Chaussée,
Merchant, and AUGUST GRANTZDÖRFFER, of 50, Jacobstrasse, formerly of Werder
Kahnstrasse 1, Foreman-refiner, all in Magdeburg, 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:-
This invention relates to an improved process for the rapid crystallization of
sugar from the bye products of the filling mass in sugar manufacturing thus
forming good material for subsequent treatment in the centrifugal apparatus.
In carrying our invention into effect we submit the filling-mass boiled in
the vacuum pans, and after removal therefrom, to the grain or thread test in
a separate vessel, where it is well divided and mixed with carbonic acid, sul-
phurous acid or a gas of a similar nature and then cooled, air being however in no
case used. By the striking of this mass upon a plate it cools, and oblong
bubbles are formed, which, as is well known, have an advantageous influence
upon the crystallization. The mass is then mixed with the gas by means of an
appropriate apparatus The crystals formed tend to gravitate downwards by
their own specific weight but are prevented from so doing by the upwardly
travelling gases and therefore they can only sink slowly and in consequence the
crystals are surrounded uniformly throughout the entire crystallization chamber
by the same mother lye during the whole period of crystallization. After having
filled the crystallization chamber with the filling mass, well treated with gas, it
is at once artificially cooled, and to this end the apparatus is jacketted. Further-
more the carbonic-acid pipe also assists in the cooling, and is for this purpose
provided with an inlet socket through which cold air enters the pipe. During
this time the gas bubbles are drawn-off by a natural draught (arranging for a
high level outlet) and after they have been entirely removed, the mass is fully
crystallized-out and is ready for the centrifugal apparatus.
Referring to the accompanying drawings
Figure 1 is a vertical section and
Figure 2 a vertical cross section of an apparatus adapted for carrying our
invention into effect.
The apparatus comprises a cylindrical body A fitted at the top with an inlet-
pipe or passage B through which flows the filling mass from the vacuum pans.

page_text: The mass then falls upon a dished shaped plate and is thereby transformed into
a thin liquid layer well intercepted with oblong bubbles.
The plate C is disposed above a funnel shaped piece D of the carbonic-acid
pipe E, so that the carbonic acid is brought into intimate contact with the thin
laver of material and mixes therewith. It is advantageous to fill the crystalli-
zation chamber with carbonic acid before entering the filling-mass and this is
effected through the inlet F. To the inlet pipe B is secured a long draw off
pipe for creating a natural draught in order to remove the bubbles from
the mass and cool the interior of the same by drawing cold air up the central
pipe directly the lower end thereof is opened.
After complete crystallization the mass is run out through the outlet pipe H.
The boiled condensed mass is allowed to flow upon the dish-shaped plate in
such a manner as to overflow the edges thereof in a very thin layer.
Simultaneously therewith carbonic acid or the like is admitted through the
pipe E and thus the mass is intimately mixed with the acid.
When the vessel A is filled to the level of the funnel shaped piece D_the
inlets for the mass and for the carbonic acid are closed, and the mass is then
cooled, thereby allowing the gas-bubbles to escape in a natural manner. After
about 16 to 24 hours, the crystallization is terminated, and the mass is ready
for treatment in the centrifugal apparatus.
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. In a process for the rapid crystallization of the bye-product from the filling
mass of sugar manufacture, characterized by the minute division and simul-
taneous intermingling of the mass with carbonic acid, sulphurous acid or gas
fo a similar nature, and finally cooling the same centrally and at its external
surfaces substantially as described.
2. The apparatus for carrying out the process claimed in Claim 1, charac-
terized by a dividing plate with a gas divider arranged at its edges and dis-
posed in the interior of a jacketted cylinder substantially as described and illus-
trated with reference to the accompanying drawings.
Dated this 15th day of May 1900.
HASELTINE LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.