Year: 1898

page_text: A communication by HENRI ARMAND JOSEPH MANOURY, of 34, Rue Taibout, Paris,
in the Republic of France, Engineer.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester,
both in the County of Lancaster, 118, New Street, Birmingham, in the County
of Warwick, and 322, High Holborn, in the County of Middlesex, Civil Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the refining of raw sugar, enabling
an immediate maximum of refined sugar to be obtained by the suppression of
by-products or
"bastard sugar.
"
In the operation of refining raw sugar as at present practised if carried out
with white sugar it goes directly to the melting, if with brown sugar it is sub-
jected to an intermediate process known by the name of refining which consists
in increasing the richness and whiteness of the sugar by suitable washings and
centrifugalling. The sugar thus whitened and purified is then melted and serves
for the preparation of the syrup which by boiling after having been filtered
yields the refined masse cuite. This refined masse cuite furnishes refined sugar,
by a treatment which it is unnecessary to more particularly describe here and
green syrup which may be boiled into grain once or twice to yield by centri-
fugalling sugar of good quality capable of being cast directly, and a drain syrup
which can only be boiled to filet, that is to say, until it runs thick & ropy.
This drain syrup is mixed with the drawings from the refining of raw sugar and
the whole is boiled to filet and crystallized until final molasses is obtained. The
sugar arising from these successive crystallizations is an inferior sugar called
"bastards."
The present improved process avoids the formation of these inferior products
which complicate the refining and prolong the duration of same.
This improved method consists in commencing the boiling to grain with green
refinery syrup until grain or crystals of the desired size are obtained, and replacing
at this point in feeding the boiler the green syrup by drainings of clarifying
syrup or rich drainings from a previous boiling and then when it is exhausted
continuing the boiling by means of the poor drainings of the same preceding
boiling so as to lower as far as possible to a minimum the purity of the mother
liquor of crystallization of sugar in the masse cuite in preparation. This is the
operation if white casting sugar be employed, but if brown sugar be used there
must be added to the cuite crystallised to the desired point with the green
syrup, first refining syrup then rich drainings from the preceding boiling and
finally a sufficient quantity of poor drainings to lower the purity of the mother
liquor of crystallization to the desired point. For instance the masse cuite thus
39

page_text: It must
obtained and run from the boiling apparatus into a cooling mixing apparatus
where poor drainings more or less diluted are added thereto in order to maintain
its fluidity and allow of its being centrifugalled, yields said centrifugalling white
sugar, a rich syrup of 72 of purity, and a poor syrup of 68 purity. It has been
explained that all the rich drainings are returned to the next boiling whilst only
a certain portion of the poor drainings is employed after the rich drainings for
completing the boiling. There remains therefore an excess quantity of poor
drainings which is placed to one side and cannot be delivered directly as molasses
seeing that it still contains 68 of purity instead of 60 as usually contained by
molasses. In order to supply it as molasses a portion is taken and transformed
into saccharate of baryta or strontia by the ordinary methods and which is then
washed in order to obtain it as pure as possible. The mother liquor from the
preparation of this saccharate only contains little sugar and the majority of the
impurities of the poor drainings treated so that by mixing it with the poor
drainings set on one side its purity is reduced to that of molasses.
however be pointed out that the mother liquor will contain baryta or strontia
according as to which has been employed in the operation and the molasses must
be freed therefrom. This result will easily be attained by saturating the said
alkaline earthy base with one of the following acids, viz. carbonic, sulphurous,
phosphoric, or sulphuric or even by one of the sulphates of magnesia, iron, zinc
or the like. The precipitate formed is separated out by filtration through a
filter press and the molasses brought to the required degree is ready for sale
commercially. The saccharate of baryta or strontia purified by washing serves
for purifying casting syrups by pouring it directly into the melting pan, the
sugar being separated out by the addition of sulphurous- or phosphoric acid or
even of one of the sulphates of magnesia, iron, zinc or the like which precipitates
the baryta or strontia in the form of an insoluble compound. By clarification
if necessary and filtration, the casting syrup is freed from the precipitate and
after mechanical or charcoal filtration it is boiled in order to obtain the masse
cuite."
Dated this 19th day of September 1898.
WM. P. THOMPSON & Co.,
Agents.
A communication by HENRI ARMAND JOSEPH MANOURY, of 34, Rue Taibout, Paris,
in the Republic of France, Engineer.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester,
both in the County of Lancaster, 118, New Street, Birmingham, in the County
of Warwick, and 322, High Holborn, in the County of Middlesex, Civil Engineer,
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 improvements in the refining of raw sugar, enabling
an immediate maximum of refined sugar to be obtained by the suppression of
by-products or "bastard" sugar.
In the operation of refining raw sugar as at present practised if carried out
with white sugar it goes directly to the melting, if with brown sugar it is sub-

page_text: jected to an intermediate process known by the name of refining which consists
in increasing the richness and whiteness of the sugar by suitable washings and
centrifugalling. The sugar thus whitened and purified is then melted and serves
for the preparation of the syrup which by boiling after having been filtered
yields the refined masse cuite. This refined masse cuite furnishes refined sugar,
by a treatment which is unnecessary to more particularly describe here and
green syrup which may be boiled into grain once or twice to yield by centri-
fugalling sugar of good quality capable of being cast directly, and a drain syrup
which can only be boiled to filet, that is to say, until it runs thick and ropy.
This drain syrup is mixed with the drawings from the refining of raw sugar and
the whole is boiled to filet and crystallized until final molasses is obtained. The
sugar arising from these successive crystallisations is an inferior sugar called
"bastards."
The present improved process avoids the formation of these inferior products
which complicate the refining and prolong the duration of same.
"
This improved method consists in commencing the boiling to grain with green
refinery syrup until grain or crystals of the desired size are obtained, and replacing
at this point in feeding the boiler the green syrup by drainings of clarifying
syrup or rich drainings from a previous boiling and then when it is exhausted
continuing the boiling by means of the poor drainings of the same preceding
boiling so as to lower as far as possible to a minimum the purity of the mother
liquor of crystallisation of sugar in the masse cuite in preparation. This is the
operation if white casting sugar be employed, but if brown sugar be used there
must be added to the cuite crystallised to the desired point with the green
syrup, first refining syrup, then rich drainings from the preceding boiling and
finally a sufficient quantity of poor drainings to lower the purity of the mother
liquor of crystallisation to the desired point. For instance the masse cuite thus
obtained and run from the boiling apparatus into a cooling mixing apparatus,
where poor drainings more or less diluted are added thereto in order to maintain
its fluidity and allow of its being centrifugalled, yields by said centrifugalling white
sugar, a rich syrup of 72 of purity and a poor syrup of '68 purity. It has been
explained that all the rich drainings are returned to the next boiling whilst only
a certain portion of the poor drainings is employed after the rich drainings for
completing the boiling. There remains therefore an excess quantity of poor
drainings, which is placed to one side and cannot be delivered directly as molasses
seeing that it still contains 68 of purity instead of 60 as usually contained by
molasses. In order to supply it as molasses a portion is taken and transformed
into saccharate of baryta or strontia by the ordinary methods and which is then
washed in order to obtain it as pure as possible. The mother liquor from the
preparation of this saccharate only contains little sugar and the majority of the
impurities of the poor drainings treated so that by mixing it with the poor
It must
drainings set on one side its purity is reduced to that of molasses.
however be pointed out that the mother liquor will contain baryta or strontia
according as to which has been employed in the operation and the molasses must
be freed therefrom. This result will easily be obtained by saturating the said
alkaline earthy base with one of the following acids, viz. carbonic, sulphurous,
phosphoric, or sulphuric or even by one of the sulphates of magnesia, iron, zine
or the like. The precipitate formed is separated out by filtration through a
filter press and the molasses brought to the required degree is ready for sale
commercially. The saccharate of baryta or strontia purified by washing serves
for purifying casting syrups by pouring it directly into the melting pan, the
sugar being separated out by the addition of sulphurous or phosphoric acid or
even of one of the sulphates of magnesia, iron, zinc or the like which precipitates
the baryta or strontia in the form of an insoluble compound. By clarification
if necessary and filtration, the casting syrup is freed from the precipitate and
after mechanical or charcoal filtration it is boiled in order to obtain the masse
cuite."

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is:
.
An improved method of refining raw sugar consisting in producing only refined
sugar and final molasses and dispensing with by-products or bastard sugar, said
result being obtained by the operations hereinbefore described in detail and which
may be summed up as follows:-
1. In working with white sugar, boiling the green refinery syrup until grain
or crystals of the desired size are obtained, then continuing the boiling with the
whole of the rich drainings from a previous boiling and completing with a given
quantity of poor drainings from the same previous boiling so as to lower to a
minimum the purity of the mother liquor of crystallisation of the masse cuite in
preparation.
2. In working with brown sugar, boiling the green syrup until grain of the
desired size is obtained, then adding thereto refining syrup and then rich drainings
from the preceding boiling and finally a given quantity of poor drainings in order
to lower to a minimum the purity of the mother liquor of the masse cuite in
preparation.
3. In order to reduce the poor drainings remaining in excess of the degree of
molasses, that is to say to reduce their degree of purity for instance from '68
to 60 taking a portion of said drainings and treating same with baryta and
strontia in order to form corresponding saccharates and mixing the mother liquor
for preparing these saccharates with the poor drainings remaining so as to lower
its purity to that of molasses, the operation being conducted in the manner herein-
before set forth.
4. The use of saccharate of baryta or of strontia for purifying casting syrups
by separating the sugar from the saccharate by means of sulphurous or other
suitable acids or by means of sulphate of magnesia or other like salts in the
manner herein before set forth.
Dated this 16th day of M 1800