The Hawaiian gazette. [volume] (Honolulu [Oahu, Hawaii]) 1865-1918, 1871-02-15
CIOugh's Process of Defeating and
Refining Game Juice.

In the ordinary methods of Defeating Can
Juice the temper lime is added to the crude juice
and at the boiling point the scum, which appear
on the surface, is removed. Upon further boiliu.
other impurities appear, aud are removed b.
skimming or sweeping In this operation tht
juice is but imperfectly defeated, as considera
bic portion Of the Impurities remain as minut,
floating particles in the liquid. and communicate
a gray or dirty cast to the sugar. This method
is, moreover, very laborOus, it requires an activ,
aud steady fire and the most unremitting atten
ton and fidelity on the part of the operatives.
Bat there are other and more important Oh.
jections to this method of working, some of which
are the following:
First-Adding lime to the green juice is inap-
propriate and injurious. The chlOrophyl, free al
bumen, and many other impurities contained in
cane jaice may be raised to the surface by heat
alone, while the action of lime upon these fecu-
lencies produces color and otherwise injuries the
quality of the sugar.
lSeooHd-When lime is added to crude juice its
property is mainly exhausted upon impurities
which should be removed before the lime is ap-
piled, and its effect in coagulating the gummy or
glutinous impurities and in refining the juice, is
almost entirely lost
Third Any process or method which depends
upon skimming alone as means of cleaning cane
juice is. in the nature of things uncertain and i'm
perfect.
The process which is here submitted provides
a simple, convenient and certain method by which
the juice is both defeated and refined and all
before the work of evapOrating is commenced.
The juice is first brought to the boiling point
il plain heater, when the green scum which ap-
pears upon the surface is removed.
Next, the juice, while still in the heater is
treated with small dose of lime, mixed with a
quantity of finely ground sulphate of baryta
The lime produces an instantaneous coaglution of
the gummy impurities forming delicate faky
tissue throughout the whole mass; this encloses
and locks up the atmos of baryta, and all other
floating particles which remain IN the juice.
The juice is then drawn of into a settling tank
where in few minutes, the faky impurities-
made heavy by the particles of baryta which they
to the bottom in the form of a
dense, compact sediment, after which the clear
and perfectly refnd liquid is drawn off and boiled
down to sugar.
The powdered sulphate Of baryta is used solely
for the purpose Of causing the gummy Impurities,
by the lime to subside 1t is perfect
y insOluble and harmless substance, and imparts
DO property whatever to the sugar.
The apparatus required for using this process
S very simple consisting of a heater and two set
ling tanks, and these can usually be arranged in
with existing works without any i'm
2Ortant changes.
Cane juice that has been defeacated and refined
BY this process may be charged directly into a
1acuum pan and made to produce lrhhe sugar
ria50u The use Of bone black Boiled in an or
iinsry open train, or in the newly introduced
Cooks Evaporator, it will afford perfectly clean,
right sugar, and with a great saving in labor.
For further information relating to this process
ddress ClOugh Refining Co, Cincinnati, O., or
Tohn A Dougherty, Esq, Baton Rouge, general
gent for Louisiana, or
THos. B. BoDLEY & Co,
No. 9 Perdid0 s.. Neg Orleans |