IMPROVEMENTS IN THE MANUFACTURE OF MATERIALS FOR DECOLORING SUGAR AND OTHER SACCHARINE AND, LIQUID MATTERS
Year: 1865

page_text: PROVISIONAL SPECIFICATION left by William Clark at the Office of the
Commissioners of Patents, with his Petition, on the 21st September 1865:
-A communication from abroad by Chrétien Jean Gaade, Commission
Agent, of 29, Boulevart St. Martin, Paris.
21
I, WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex,
Engineer, and Patent Agent, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE MANUFACTURE OF MATERIALS FOR DECOLORING
SUGAR AND OTHER SACCHARINE AND, LIQUID MATTERS," to be as follows:-
This Invention relates to improvements in the decoloration of juices,
syrups, sugars, and other similar products. Pulverized charcoal and animal
black have been employed hitherto, the latter in a state of powder, which
prevents its being, revivified.; Charcoal in grain has also been used in filtering.
apparatus, while more recently attempts have been made to revivify the
animal black as; far as possible, but at each operation there is a proportion
of charcoal in powder which must be got rid of in order to prevent obstruc-
tions. Each revivification of animal black thus produces a considerable loss
of material.
This Invention relates to a means of partially or entirely utilizing the
refuse resulting from the more porous of the grains of animal black having

page_text: the largest coloring properties. The rapid disintegration of the more porous
grains causes the animal black to lose much of its power as a decoloring agent
which decreases in proportion as its revivification is renewed. Hence, I have
sought to utilize this refuse powder resulting from animal black by transforming
it into grains.
The following is a description of the Invention:-I take the animal black
in powder and mix it with argillaceous earth, or that used for the manufacture
of glazed ware and triturate the whole with water so as to form a pasty mass,
which I then mould in the form of small bones or otherwise, and dry it in
the sun.
Lastly, I terminate this preparatory process by calcining it in a similar
manner to bones. In order to regulate the exact degree of calcination, I
place in the centre of the apparatus in which the minero-animal composite is
contained a piece of bone and of green wood, and heat it until the wood and
bone are completely carbonized. After this operation is completed, I reduce
the particles of minero-animal composite into grains of a similar size to those
now used. This improved charcoal may be used for the decoloration of the
matters before specified and be also revivified the same as ordinary animal
black. The composite thus obtained being of greater density than ordinary
animal black, I have sought to produce a material exactly similar to that
ordinarily in use, which result I obtain by mixing 50 per cent. of animal
black in fine powder, 25 per cent. of vegetable charcoal in fine powder, and
25 per cent. of pottery clay, the whole being mixed and prepared as before
described. This compound may, if desired, be mixed in any suitable
proportions with soot, gelatine, potash, or other matters. In the case of a
compound mixture it may also be calcined and revivified a great number of
times.
This Invention is applicable either to fresh charcoal obtained from animal
matters, whether natural or artificial, in powder or in grains, and also to that
which has been previously used.
These preparatory processes may or may not be effected by mechanical
means in suitable apparatus, which may be varied as desired, the Invention
consisting in the production of an improved agent for effecting the decoloration
of liquid matters generally, and especially of saccharine solutions.