A NEW OR IMPROVED MODE OF SACCHARATIFICATION OF SUGARY SUBSTANCES
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by Edward Thomas Hughes at the
Office of the Commissioners of Patents, with his Petition, on the
30th November 1866.-A communication from abroad by Dr. Frederic
Jünemann, of Rudolpheim, in the Empire of Austria, Chemist, and
Pierre du Rieux and Edouard Roettger, of Lille, in the Empire of
France, Civil Engineers.
I, EDWARD THOMAS HUGHES, of the Firm of Hughes and Son, Patent
Agents, 123, Chancery Lane, London, do hereby declare the nature of the
said Invention for "A NEW OR IMPROVED MODE OF SACCHARATIFICATION OF SUGARY
SUBSTANCES," a communication to me from abroad by Dr. Frederic Jünemann,
of Rudolpheim, in the Empire of Austria, Chemist, aud Pierre du Rieux and
Edouard Roettger, of Lille, in the Empire of France, Civil Engineers, to be
as follows:-
This Invention, as communicated to me, consists in producing a granular
or gelatinous. precipitate of saccharate of line obtained from more or less
concentrated solutions of sugar, such as evaporated juices, cane juice, syrups,
or molasses from sugar manufactories or refineries.
The said precipitate is produced by adding bydrated quicklime to such
solutions of sugar in quantities proportionate to the richness of the sugar
and the degree of concentration of the liquid. When molasses are treated
according to this Invention they are first mixed with boiling water till they
mark about 24 degrees Beaumé in a boiler of convenient size provided with
the means of admitting thereto steam for heating and carbonic acid; when
the dilution is completed the mixture is allowed to cool. In a separate vessel

page_text: powdered bydrated quicklime is prepared by causing boiling water to drop
upon calcined limestone till the said stone crumbles and forms a fine powder.
Having removed from the said powdered hydrated quicklime any pieces of
stone that may be mixed with it, it is taken when cold in suitable quantities
(say, 20 or 30 per centum in weight) and passed through a suitable sieve
into the cool liquid in the boiler until it ceases to produce a granular or
gelatinous precipitate. As soon as a precipitate is formed the coloured liquid
is decanted and the residuum is washed with boiling water, by which operation
the saccharate of lime is precipitated, it being insoluble in boiling water.
The said water is then poured into a second boiler and heated to a boiling
point, and the precipitate formed in the said water is then placed in the first
boiler with the precipitate of washed saccharate of lime; a small quantity of
water is now added and the whole is saturated with carbonic acid, steam being
admitted in order to precipitate the carbonate of lime more speedily. The
dense syrup thus produced may now be at once boiled, or it may be previously
filtered. The syrup remaining in the residuum carbonate of lime may be
extracted by passing the said residuum through filtering presses. When the
precipitate saccharate of lime is very impure it may be passed, before satura-
tion, through filtering presses or turbines in order to remove the impure
liquid, and the cake thus obtained is then saturated. Syrup or concentrated
juices marking 10 or 20 degrees Beaumé may be treated in a similar manner
with about the same proportion of line, but being more pure than molasses
they do not require so much washing. The washing, saturation, and other
processes above mentioned may be repeated or fractioned as often as is found
necessary in any suitable vessel.
And according to this Invention by drated quick barytes, strontia, and
magnesia may be used instead of bydrate quicklime, and instead of carbonic
acid it may in some cases be preferable to use a solution of alum to precipitate
the lime in a solution of saccharate of lime and to decompose the saccharate.
And in order to purify the saccharate produced according to this Invention
cold lime water made from a very weak solution of hydate of lime may be
poured upon the impure cristallised saccharates, and the said lime water will
in about six hours dissolve the colouring matter, which may then be removed
by decantation.