Process for Clarification of Yeast Extracts.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Process for Clarification of Yeast Extracts.
I, EMILE DE MEULEMEESTER, Manufacturer, of 54, Rue de Neuchatel, Brussels,
in the Kingdom of Belgium, do hereby declare the nature of this invention to be
as follows; —
This invention has for its object a process for the clarification of yeast extracts.
These extracts are very difficult to be clarified by filtration whatever may be
the period of their manufacture during which they are treated.
My process consists in separating the matters in suspension in these extracts
and in adding to them albuminous or gelatinous matters which in coagulating
carry with them the matters to be eliminated.
For this purpose, the mass is diluted with two to three times its volume of
water, and after intimate mixture one or other of the following ways is adopted.
An albuminous matter such as white of egg, ox's blood or similar matter is
dissolved in water or other suitable liquid, the solution is mixed with the mass
of yeast extract and the albuminous matters are heated up to coagulation, which
in coagulating carry along with them to the bottom or to the surface of the mass
the residual and insoluble products whilst the liquid containing the dissolved
matters remains perfectly clear and brilliant. The coagulum can be separated
from the clarified liquid by decantation or by filtration. Any gelatinous matter
whatever is mixed with the mass of yeast extract to be clarified whether animal or
vegetable, such as Iceland moss, Chinese glue or isinglass. This mixture can
be done whilst hot or cold. Whilst hot the gelatinous matter dissolves and in
becoming cold again it coagulates and carries with it the matters in suspension
in the mass.
Whilst cold it is preferably employed in the form of jelly which is put into the
liquid to be clarified and according to the density of the latter and the composi-
tion of the matter employed, the coagulum which is formed is carried along with
the matters in suspension to the bottom of the receiver or to the surface of the mass.
1000
I, EMILE DE MEULEMEESTER, Manufacturer, of 54, Rue de Neuchatel, Brussels,
in the Kingdom of Belgium, do hereby declare the nature of this invention and in
[Price 8d|

page_text: what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement;
-
This invention has for its object a process for the clarification of yeast extracts.
These extracts are very difficult to be clarified by filtration whatever may be
the period of their manufacture during which they are treated.
2.My process consists in separating the matters in suspension in these extracts
by adding to them albuminous or gelatinous matters which in coagulating carry
with them or retain in their mass the matters to be eliminated.
For this purpose, the mass is diluted with two to three times its volume of
water, and after intimate mixture one or other of the following operations is
adopted,
A. An albuminous matter such as white of egg, ox's blood or similar matter is
dissolved in water or other suitable liquid, the solution is mixed with the mass
of yeast extract, and the whole is heated up to coagulation of the albuminous
matters, which in coagulating carry along with them to the bottom or to the
surface of the mass the residual and insoluble products whilst the liquid containing
the dissolved matters remains perfectly clear and brilliant. The coagulum can
be separated from the clarified liquid by decantation or by filtration.
B. Any gelatinous matter whatever is mixed with the mass of yeast extract to
be clarified whether animal or vegetable, such as Iceland moss, Chinese gluc, or
isinglass. This mixture can be done whilst hot or cold. Whilst hot the gelatinous
matter dissolves and in becoming cold again it coagulates and carries with it
the matters in suspension in the mass.
Whilst cold it is preferably employed in the form of jelly which is diluted in
the liquid to be clarified and according to the density of the latter, and the com-
position of the matter employed, the coagulum which is formed is carried along
with the matters in suspension to the bottom of the receiver or to the surface of
the same.
C. A jelly obtained from fish glue or other gelatinous matter is taken, and in
this jelly the extract of yeast to be clarified is slowly poured. Under the influence
of tannin which is always present in yeast obtained from beer, the jelly coagulates
and forms a mass with the extract which has been poured in. After allowing the
mass to stand for a time it is drained, and the liquid which comes out is perfectly
clear, the cells and other matters which were in suspension in the extract being
retained in the coagulated mass. This mode of operation may be modified, by
first mixing the jelly with a solution of tannic acid to coagulate it. The extract is
then poured upon the mass thus obtained, which will act as a filter.
Having now particularly described and ascertained the nature of my said
invention, and in what manner same is to be performed, I declare that what
I claim is:-
A method of clarifying extracts of yeast, consisting in separating the matter
in suspension in the extracts by means of albuminous or gelatinous matters,
which in coagulating carry with them or retain in their mass matters to be
eliminated, substantially as herein before described.
T T
T
1000
1534
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.