A Process for Purifying Molasses for Use in the Manufacture of Pressed Yeast.
Year: 1899

page_text: Date of Application, 27th July, 1899
Complete Specification Left, 27th Apr., 1900 -Accepted, 16th June, 1900
PROVISIONAL SPECIFICATION.
A Process for Purifying Molasses for Use in the Manufacture of
Pressed Yeast.
I, EMIL KAFKA, of. 11, Allegasse, Olmütz, in the Empire of Austria, Chemist,
do hereby declare the nature of this invention to be as follows:-
-
The albumen and other organic impurities contained in molasses render it
unfit for the preparation of pressed yeast.
Hitherto the attempt has been made to rectify the molasses that is to destroy
its colour and odour by the use of acids but without obtaining the desired result
as it is necessary that it should be freed in the first place from albumen and
other organic impurities to enable it to be used for the manufacture of pressed
yeast.
The object of this invention is a process for the purification of molasses so
as to make them fit for use in producing pressed yeast and it consists in treating
the molasses with alum at a temperature of about 70° C. in a suitably diluted
condition and this whether the molasses has an acid neutral or alkaline reaction.
I find that the alum has the property of precipitating all the organic matter.
especially the albumens from the molasses, which effect cannot be approximately
attained by any other non-injurious chemical substance. By this treatment the
molasses is now inverted but this does not interfere with the process nor with
the object aimed at since it is not affected by this additional phenomenon but
the result is a pure and odourless molasses which is extremely suitable for the
production of pressed yeast.
The organic impurities and albumen precipitated by the alum are separated
by the filter press whilst the excess of alumi is removed from the molasses by
means of lime in the well known way.
A. Process for Purifying Molasses for Use in the Manufacture of
Pressed Yeast.
I, EMIL KAFKA, of 11, Allegasse, Olmütz, in the Empire of Austria, Chemist,
do hereby declare the nature this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by
the following statement:-
The albumen and other organic impurities contained in molasses render it
unfit for the preparation of pressed yeast known as German barm.

page_text: Hitherto the attempt has been made to rectify the molasses that is to destroy
its colour and odour by the use of acids but without obtaining the desired result
as it is necessary that it should be freed in the first place from albumen and
other organic impurities to enable it to be used for the manufacture of pressed
yeast.
The object of this invention is a process for the purification of molasses so
as to make them fit for use in producing pressed yeast and it consists in treating
the molasses with alum at a temperature of about 70° C. in a suitably diluted
condition and this whether the molasses have an acid neutral or alkaline reaction
particularly not with aluminium hydrate which has been suggested as this leaves
the albumen contained in the molasses unaffected.
I find that the alum has the property of precipitating all the organic matter,
especially the albumens from the molasses, which effect cannot be approximately
attained by any other non-injurious chemical substance. By this treatment the
molasses is now inverted but this does not interfere with the process nor with
the object aimed at since it is not affected by this additional phenomenon but
the result is a pure and odourless molasses which is extremely suitable for the
production of pressed yeast.
The organic impurities and albumen precipitated by the alum are separated
by the filter press whilst the excess of alum is removed from the molasses by
means of lime in the well known way.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
Process for purifying molasses (either with neutral alkaline or acid reaction)
for use in the manufacture of pressed yeast or German barm which consists
in treating the molasses with excess of alum suitably diluted and at a temperaturė
of about 70° C. for the purpose of deordorizing it and precipitating the albumen
and organic impurities substantially as described.
Dated this 26th day of April 1900.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, & London, Patent Agents,