The Hawaiian gazette. [volume] (Honolulu [Oahu, Hawaii]) 1865-1918, 1871-04-05

Z
juice crystallizes under this process, renders it
necessary that the cooked juice should be run of
when less firm than is usual in other processes.
The turb;nage is easily effected and requires less
water to be used than is ordinarily the case when
whitening sugar in a complete manner.
p When tanks heated by steam are used Se-
fore sending the canejuice into the battery. the
MOuo-Sulphite of lime mixture is introduced
directly into the defecator, but only per cent
is employed. After having thoroughly mixed il
with the juice. the defacatisn is proceeded with,
and should last at least quarter Of an hour.
Then the scum is removed. aud the sugar liquid
is allowed TO run into the reservoir in which the
decantering is effected. This being accomplished.
the juice is drawn of, and at the moment il flows
into the battery further quantity Of the Sui
phite liquid is sdded. say about per cent The
rest Of the operation is effected in the manner
previously described
B. When the first work Of concentration. in
place Of being accompr shed in open FIRE IS effected
in trippe-etfect apparatus, the mode Of proceed
ing just indicated may be adganiageoasly modi-
fed
1t is then easy to obtain from the first com.
mencement complete defacaIion which simpli-
6es AID ameliorates the employ Of the triple
effect system. In this case the following is done
The nejucice 70 which only small doses Of
the ulphte Of lime mixture is added to prevent
fermentation. is directed into the doSble-bottom
tanks where it is submitted at first to an ordinary
defacation by means Of lime. This is thrown in
little by little Ie the form Of fine powder. and
the quantity to be employed ought TO be such that
after the removal Of the scum the juice should
/ evidently possess the same degree Of acidity as
before the Introduction Of the lime. This result
is generally obtained by employing six to seven
ounces Of lime for about GO gallons Of juice.
The defaeation accomplished, and the scum
removed, the Sulphite mixture, which, hoEever,
should be made slightly more acid than when il
is employed in the battery, is introduced into the
| liquid mass to the extent Of per cent The
whole is then mixed up and stirred about several
times 1t is again heated during eight to ten
minutes and il is allowed 10 run iaio reservoirs
where the decantation is effected very rapidly.
The juice thus prepared can be concentrated
/ by the tripple-effect system without leaving any
deposit worth mentioning.
MoDE or EMPLOYMENT FoR syRuPs.
The syrups remaining from the turbinage Of
sugars. when treated with Mono-sulphiie Of Lime,
/ give most advantageous results Under The in
iuence Of that agent, syrups become purified.
decolorzed and crystallized with remarkable
facility.
The mode Of employing the sulphite Of lime
does not differ from that already indicated in The
treatment of cane-uice. The quantity alone has
TO be varied accord ng to the degree Of decolora-
tion and publication obtained throrgh the pre-
vious action of the suphite on the eane-juee.
This quantity should be from = to 5 per cent.
Of the volume Of syrup brought to % b.. that
Is to say, from = to gallons Of the yellowish
sulPhte Of lime mixture to 100 gallons Of syrup
mingled with water to the degree most con
venient for its cooking. namely. 259 B.
The syrup should be recently produced. and
have an acidity very nearly the same as that Of
tue clarified juice taken from the battery. Wien
it is not fresh. lime and water must be added be-
| fore treating it with the sulphIte. In point Of
fact the syrup should be made. as Ear as possible
with regard to acidity, to resemble the Yesou,
aud the quantity Of Sulphite Of Lime to be en-
pleyed should be more or less in proportion "a
the syrup Is darker colored aud less pure.
There is one point to which it is most i'm
portant to call attention. and that is. that syrups
have generally great tendency 70 become acid
as soon as their temperature rises above the or
dinary heat. Consequently it IS often best to
add to them certain quantity Of line and xzter
before applying the Mono-Sulphite This auan-
tity of lime and water should be in proportion 10
the greater or less facility with which the
syrups become acid when their temperature is
heightened.
Under these circumstances, great care should
be exercised in observing the degree Of acidity
Of the syrups, and before raising their tempora-
tCre enough lime should be added to keep this
acidity sufficiently weak during the whcIe boiling
process.
/ Manufactured By this process syrup sugars
have perfect grain and a very fine color. This
ameoration, however, IS not entirely due 10 .hs
direct influence OF the substance employed Il
also results from the puriication TO which the
yesou has already been submitted. and abe
/ "D1F"SS ~ t"D 9J4up VI tuOse iOfti4l soI1uIe
matters which, as is known. are one Of the prin-
cipa obstacles TO the capitalization Of sugars Of
the second boiling.
NorR--This apparatus Is not exclusively adapted
for the application Of the process IN question In
tended TO manufacture s9lphurous Acid and the Sui
phiies, II viii serve to put into practice Other
methods which not the object of special rescrra
tons, such, for Instance, those consisting Of the
direct employment Of sulphurous Acid or Bi Sui
phite solutions These methods, prac;leed At dif
ferent epochs By Melsens, Stewart. ReyDoso, and
Others, have this iBcoDvenience, that ihey DO Bos
operate in precise manner, and nsceasi:sfs sus-
Veilianee not always obtsiaable Ia coiouisi sugar
houses. Nevertheless, 10 experienced hands, thsr
may give good results. Therefore, IL Is not oa, Of
place to summarize them In few Ilnes for The Ia
formation Of those persons who may desire 10 put
them to the test Of experiment Leaving aside the
small differences which charaeterize them they may
be considered 10 embrace three modes Of proceed
ing. One consists IN Introducing suiphHfous acid,
OF a solution, more or less concentrated Of b.