Boiled Refinery Mass.
Year: 1887

page_text: Date of Application, 16th Sept., 1887.
Specification Accepted, 18th Oct., 1887.
from Boiled Refinery Mass.
I, CARL HERMANN JOHANN FRANZEN of the town of Cologne, Germany, Engineer,
do hereby declare the nature of my said invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:
My invention relates to a process for manufacturing white lump or loaf sugar
directly from boiled refinery mass.
The usual process of manufacturing cast moulded sugar consists in filling hot
impure sugar into a mould and after the same has been cooled and crystallised in the
said mould, washing the said impure sugar with a pure solution (clarifying liquor)
then freeing the same from fluid by suction or in a centrifugal machine and then
drying the same.
According to my process I submit the sugar to the following process or treatment:-
The ordinary sugar mass is boiled until the same contains the least possible quantity
of moisture (congelation being prevented) and is cooled in appropriate cooling
apparatus so that a crystalline homogeneous pulpy mass of syrup and crystals is
produced.
•
This crystalline mass is filled into suction vessels with large sieve bottoms and the
colored syrup expelled by means of a pure solution of sugar the colored syrup being
replaced by the colorless pure sugar liquor so that a perfectly pure white crystalline
pulpy mass containing the requisite quantity of water will be obtained.
In order to carry my process into operation a vacuum or suction pump can be
employed. The pure white crystalline mass is now warmed to ordinary filling out
temperature by means of steam of low pressure or in a water bath by means of boiling
water. The hot pure white mass is now filled into moulds.
After the mass has cooled and solidified the moulds are placed in suitable centri-
fugal machines or on suction tables in order to remove the clarifying liquor adhering
to the sugar the sugar then is removed from the moulds and dried whilst the liquor
withdrawn from the same can be employed again for the next operation.
In order that the impure mass may not become solid during the cooling and washing

page_text: a suitable quantity of water or syrup can be added to the same in the cooling apparatus
under continuous stirring.
In order to manufacture crystallised or so called ground sugar direct from the mass
or magma the warming process after washing is omitted and the sugar mass separated
in the centrifugal machine into pure sugar crystals and liquor.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I desire it to be understood that
what I claim is :-
1. In manufacturing lump or loaf sugar treating boiled refinery or lump sugar mass
in such manner that the same is not washed in the mould in congealed condition, but
is first filled into a suction vessel vat or vats with sieve bottom in more or less cooled
condition and in the form of a homogeneous crystalline pulpy mass and a vacuum or
suction pump applied so that the colored syrup is driven off and replaced by colorless
pure sugar solution or liquor so that a pure white crystalline mass is produced which
is heated by low pressure steam or in a water bath to its ordinary filling out
temperature and poured in as a perfectly pure crystalline mass into the mould in
which it congeals to a white, firm, hard mass which is freed from the liquor in the
centrifugal machine or by suitable suction apparatus and subsequently dried whilst
the pure sugar solution or liquor separated from the same can be employed
for carrying out further operations, substantially as described in the foregoing
specification.
2. Treating normal or strongly boiled refinery or lump sugar masses in more or
less cooled condition as a homogeneous loose crystalline pulp in sieve bottomed suction
vats or vessels with a colorless sugar solution in order to free the sugar crystals from
all syrup adhering to the same and obtain by means of the said sugar solution and
the sugar crystals a pure white crystalline mass out of which the pure sugar solution
is separated by treating the mass in a centrifugal machine so as to leave pure
white crystalline sugar in the machine, substantially as described in the foregoing
specification.
Dated this Sixteenth day of September 1887.
87.
C. H. J. FRANZEN.
Per W. H. Beck,
115, Cannon Street, London, E.C.,
Agent.