An Improved Process for Decolourizing and Clarifying Tannic Extracts.
Year: 1895

page_text: Date of Application, 13th Apr., 1895
Complete Specification Left, 8th Jan., 1896-Accepted, 15th Feb., 1896
PROVISIONAL SPECIFICATION.
An Improved Process for Decolourizing and Clarifying Tannic
Extracts.
We, ALCIME SINAN, HENRI SINAN and EDOUARD GOUIN, Merchants of
Nantes (Loire Inferieure), in the Republic of France do hereby declare the nature
of this invention to be as follows:-
This invention relates to an improved process for decolourizing and clarifying
tannic extracts.
We have found by experiment that the residues from grain and oleaginous fruits
after the extraction of their oils, have a very energetic decolourizing and clarifying
power, and we avail ourselves of this property for decolourizing and clarifying
tannic extracts.
In carrying out our invention we lead the ooze, when it leaves the diffusion vat,
to a vat provided with a steam coil and the liquor is heated to boiling. During
the heating, the residues from grain or from oleaginous fruits (in the form of cake
or powder) are introduced into the vat and they are left in the ooze for about
an hour during which time they are well mashed. The quantities of the
ingredients employed will obviously vary with the degree of decolourization
desired but I preferably employ five hundred grammes per 100 litres and per
degree Beaumé.
When this operation is finished the liquor is allowed to cool and the ooze is then
filtered and concentrated in a vacuum apparatus.
The extracts obtained by this process impart a very pretty shade to leather and
if they be diluted by the addition of water to the strength suitable for tanners
they present the appearance of a clear limpid solution.
Dated the 13th day of April 1895
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
An Improved Process for Decolourizing and Clarifying Tannic
Extracts.
We, ALCIME SINAN, HENRI SINAN and EDOUARD GOUIN, Merchants, of
Nantes (Loire Inférieure) in the Republic of France, 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 an improved process for decolourizing and clarifying
tannic extracts.
We have found by experiment that the residues from grain and oleaginous
fruits, after the extraction of their oils, have a very energetic decolourizing and
clarifying power and we avail ourselves of this property for decolourizing and
clarifying tannic extracts.

page_text: In carrying out our invention we lead the ooze, when it leaves the diffusion vat,
to a vat provided with a steam coil and the liquor is heated to boiling. During
the heating the residues from grain or from oleaginous fruits (in any suitable form
such as cake or powder) are introduced into the vat and they are left in the ooze
for about an hour during which time they are well mashed. The quantities of
the ingredients employed will obviously vary with the degree of decolourization
desired but we preferably employ five hundred grammes per 100 litres and per
degree Beaumé.
When this operation is finished the liquor is allowed to cool and the ooze is then
filtered and concentrated in a vacuum apparatus.
The extracts obtained by this process impart a very pretty shade to leather and if
they be diluted by the addition of water to the strength suitable for tanners they
present the appearance of a clear limpid solution.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
The employment, for decolourizing and clarifying tannic extracts, of the
residues from grain and oleaginous fruits after the extraction of their oils,
substantially as described.
Dated this 8th day of January 1896.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.