A CERTAIN IMPROVED METHOD OF SEPARATING SUGAR FROM MOLASSES AND SYRUPS BY THE PRODUCTION OF MONO SACCHARATE OF STRONTIA AT LOW TEMPERATURES
Year: 1883

page_text: LETTERS PATENT to Carl Pieper, Civil-Engineer and Patent Agent resident
at 109-110 Gneisenaustrasse Berlin, S.W., Prussia-for an Invention of
"A CERTAIN IMPROVED METHOD OF SEPARATING SUGAR FROM MOLASSES
AND SYRUPS BY THE PRODUCTION OF MONO SACCHARATE OF STRONTIA AT
LOW TEMPERATURES a communication to him from Carl Scheibler doctor of
philosophy and professor of Berlin, Prussia, German Empire
»
PROVISIONAL SPECIFICATION left by the said Carl Pieper at the Office of
the Commissioners of Patents on the 23rd April 1883.
CARL PIEPER, Civil Engineer and Patent Agent, resident at 109/110 Gneisenau-
strasse, Berlin S.W., Prussia, AN "[A CERTAIN] IMPROVED METHOD OF SEPARATING
SUGAR FROM MOLASSES AND SYRUPS BY THE PRODUCTION OF MONOSACCHARATE
OF STRONTIA AT LOW TEMPERATURES," a communication to me from Carl Scheibler,,
Doctor of philosophy and professor, of Berlin, Prussia, German Empire,
This invention relates to the "method of separating sugar from molasses and
syrups by the production of monosaccharate of strontia at low temperatures," invented
by my correspondent and described in the specification to the British patent
A.D. 1882 No. 2239, and the improvement consists in the employment of the lies
and lixivating liquids resulting from the production of monosaccharate of strontia
by way of the aforesaid method, as a dissolvent for further portions of molasses in
order to extract nearly all the sugar of the latter without having recourse to the
production of bisaccharate of strontia.
For this purpose the said lies together with the lixivating liquids, which still
contain about 25 per cent of sugar, are warmed to about 70 degr. centigr., and then
mixed with fresh or untreated molasses and caustic strontia, and hereupon cooled
down. Finally, an small quantity of monosaccharate of strontia from a preceding
operation is added, whereby the greater part of the monosaccharate of strontia
contained in the solution is caused to separate out in the form of crystals. These
having been withdrawn, the remaining lie and the lixivating liquids are again
used for dissolving another quantity of molasses and caustic strontia, and there-
upon treated as before. By this mode of proceeding the quantity of sugar
remaining in the solution will, after every operation, become less in proportion to
the entire quantity contained in the molasses treated, and after 6 or 8 operations
it will be so much reduced that it may be neglected.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Carl Pieper in the Great Seal Patent Office on the 17th October
1883.
"
CARL PIEPER, Civil Engineer and Patent Agent, resident at 109/110 Gneisenau-
strasse, Berlin S.W., Prussia, AN CERTAIN IMPROVED METHOD OF SEPARATING
SUGAR FROM MOLASSES AND SYRUP'S BY THE PRODUCTION OF MONOSACCHARATE
OF STRONTIA AT LOW TEMPERATURES," a communication to me from Carl Scheibler,
doctor of philosophy and professor, of Berlin, Prussia, German Empire
This invention relates to the method of separating sugar from molasses, and
syrups by the production of monobasic saccharate of strontia at low temperatures,
also invented by my correspondent and described in the specification of the British
letters patent A.D. 1882 No. 2239.
. According to this method the process of separating the sugar from molasses, &c,
consists in two operations: firstly in producing at low temperature monobasic
saccharate of strontia in the solution of molasses, &c., and secondly; in producing
at the boiling temperature bibasic saccharate of strontia in the lyes resulting from
the first operation and still holding about 25 per cent of the sugar originally
contained in the molasses, &c., the said bibasic saccharate being thereupon utilized
by its addition to a new portion of molasses for the purpose of again producing
monobasic saccharate of strontia.
Although this method has in all instances proved to be completely efficient, it
possesses the inconvenience that it requires, in the second operation the production
of a substance which is not directly utilized in obtaining sugar, i.e. of the bibasic
saccharate of strontia.
For the purpose of obviating this inconvenience the second one of the said
operations is, according to the present invention, omitted and 'the sacchariferous
mother-lye and the lixivating liquor resulting from the first operation, are
employed as a dissolvent for further portions of molasses, whereupon the same
operation is repeated. The quantity of sugar hereafter contained in the remaining
lye, will not be greater than after the first operation. The whole amount of sugar
contained in the entire quantity of molasses treated being, however, doubled, the
relative amount remaining in the lye is reduced to one half. By several times
repeating the same operation, the relative residue of sugar may thus be reduced
until the lye becomes unfit for further use in the process.
The invention is carried out in the following manner: Monobasic saccharate of
strontia having been produced according to the directions given in the specification
of the aforesaid patent in respect to the first part of the process, and thereupon
separated by filter-presses or otherwise from the lye and washed, a fresh quantity
of molasses; or other sacchariferous liquid, is mixed with the lye and lixivating
liquid thus obtained, and so much caustic strontia is added as is required for the
formation, with the sugar of this molasses, &c., of monobasic saccharate of strontia
and for decomposing foreign substances. This mixture is heated to about 70 degr
centigrade' and thereupon allowed to cool. Hereafter a small quantity of mono
basic saccharate of strontia from a previous operation is added, whereby, in the
manner stated in the aforesaid specification, the greater part of the like saccharate
of strontia contained in the solution is caused to crystallize out. The crystalline
precipitate having been separated from the lye, the latter and the lixivating
liquid are' again used for dissolving another quantity of molasses and caustic
strontia. This operation may be repeated until, by the accumulation of foreign
substances, the lye has become too thick to allow a farther convenient employmen

page_text: of the same. Ordinarily this will be the case after the process has been carried
out from 6 to 8 times.
Assuming, on the ground of what has herein before been stated, that 25 per cent
of the sugar contained in the molasses remain in the lye and the lixivating liquid
of the first operation, this residual quantity will continue unchanged for all further
operations of the same series. Considering, moreover, that, after the second
operation, the entire quantity of sugar treated amounts to the double of the
quantity passing through one operation, the residual amount of sugar after the
second operation will be only 1 × 25 or 121, per cent of the whole quantity
treated, and, after 6 or 8 operations, it will represent but about 4 or 3 per cent
respectively. So insignificant a residue having been arrived at, the series of
operations may be considered finished and a new series commenced.
After the strontia present in the lye resulting from the last operation of any
series, has been extracted for further employment, the lye itself may be utilized as
manure or for the manufacture of alkaline salts, ammonia, &c.
Having thus described the nature and object of this invention and the manner
in which it is to be carried out in practice, as communicated to me by my
correspondent, I hereby claim as new and important feature of the same:
The method of employing the mother-lyes resulting from the separation of mono-
basic saccharate of strontia from molasses or other sacchariferous liquids, by mixing
with the lyes a fresh portion of molasses or sacchariferous liquid and caustic
strontia, for the purpose of again producing from such mixture monobasic
saccharate of strontia, substantially as described.
In Witness whereof, I, the said Carl Pieper, have hereunto set my hand and
seal this thirteenth day of October in the year of our Lord One thousand eight
hundred and eighty-three.