Improvements relating to the Treatment of Mangrove Bark for the Obtainment therefrom of Pure Solid Tannin, Dye, and Cutch.
Year: 1895

page_text: Date of Application, 18th Sept., 1895
Complete Specification Left, 11th Feb., 1896-Accepted, 30th May, 1896
PROVISIONAL SPECIFICATION.
Improvements relating to the Treatment of Mangrove Bark for the
Obtainment therefrom of Pure Solid Tannin, Dye, and Cutch.
I, WILLIAM CLARKE of 55, Hill Street, Singapore, Straits Settlements,
Merchant, do hereby declare the nature of this invention to be as follows :—
In accordance with my invention, the bark of any of the different varieties of
mangrove (natural order Rhizophorace) is collected and gathered in the usual
manner, either fresh or dried, and after being reduced to small pieces and
subsequently pounded, or pulverised by any suitable means, is introduced into a
Heat having
boiling vessel with the necessary quantity of pure fresh water.
been applied to the boiler, the operation of boiling is continued for the necessary
time, say for twelve hours more or less depending entirely upon the nature of
the furnace, the construction of boiler and the heat derivable therefrom. The
combined processes of boiling and "cooking" having been accomplished, the
contents of the boiler are removed therefrom and discharged into a sieve or
straining device and the liquid portion having been expressed therethrough and
separated from the residual solid particles of bark is then introduced into any
suitable type of evaporating pan and again subjected to the action of heat, which
is continued until the bulk of the liquid contents is reduced down to about one-half
of that when introduced into the evaporating pan. The remaining extract is then
mixed with a suitable quantity of either ammonia, potash, soda or any other
alkali, or alkaline carbonate, mercurial chloride, gum ammoniacum, alum or borax.
This mixture is boiled for a short time until it assumes a semi solid condition when
it is removed and cut into pieces of any desired shape or size and gradually dried
either by sun heat or artificially at a temperature which should not exceed that of
boiling water. The drying is to be continued until the compound or mixture
aforesaid becomes consolidated and will then be available for use in any climate as
pure solid tannin, dye, and cutch.
Dated this 18th day of September 1895.
V. LAZARUS,
1 Furnival Street, Holborn, E.C., Agent for Applicant.
Improvements relating to the Treatment of Mangrove Bark for the
Obtainment therefrom of Pure Solid Tannin, Dye, and Cutch.
I, WILLIAM CLARKE of 55, Hill Street, Singapore, Straits Settlements,
Merchant, 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
5 the following statement :-
In accordance with my invention, the bark of any of the different varieties of
mangrove (natural order Rhizophorace) is collected and gathered in the usual
manner, either fresh or dried, and after being reduced to small pieces and
subsequently pounded, or pulverised by any suitable means, is introduced into a

page_text: boiling vessel with the necessary quantity of pure fresh water. Heat having been
applied to the boiler, the operation of boiling is continued for the necessary time,
say for twelve hours more or less depending entirely upon the nature of the
furnace, the construction of boiler and the heat derivable therefrom. The
combined processes of boiling and "cooking" having been accomplished, the
contents of the boiler are removed therefrom and discharged into a sieve or
straining device and the liquid portion having been expressed therethrough and
separated from the residual solid particles of bark is then introduced into any
suitable type of evaporating pan and again subjected to the action of heat, which
is continued until the bulk of the liquid contents is reduced down to about one-half
of that when introduced into the evaporating pan. The remaining extract is then
mixed with a suitable quantity of either ammonia, potash, soda or any other
alkali, or alkaline carbonate, mercurial chloride, gum ammoniacum, alum or borax.
This mixture is boiled for a short time until it assumes a semi solid condition when
it is removed and cut into pieces of any desired shape or size and gradually dried
either by sun heat or artificially at a temperature which should not exceed that of
.boiling water. The drying is to be continued until the compound or mixture
áforesaid becomes consolidated and will then be available for use in any climate as
pure solid tannin, dye, and cutch.
In order to obtain, by the above described process, 1 picul (Chinese weight
of 133 lbs., avoirdupois) of solid tannin, dye, or cutch, I make use of
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The improved treatment of mangrove bark for the obtainment therefrom of pure
solid tannin, dye and cutch, substantially as herein set forth.
Dated this 11th day of February 1896.
V. LAZARUS,
1, Furnival Street, Holborn, London, E.C., Agent for Applicant.