Improvements in Formation and Preparation of Soluble Colloids. of the Gelatine Class.
Year: 1896

page_text: Date of Application, 8th Aug., 1896
Complete Specification Left, 5th May, 1897-Accepted, 5th June, 1897
NAL SPECIFICATION.
Improvements in Formation and Preparation of Soluble Colloids.
of the Gelatine Class.
I, EDMUND JAMES MILLS, D. Sc., F.R.S., of 60 John Street, in the County,
of Glasgow, North Britain, Professor of "Technical Chemistry, do hereby declare
the nature of this invention to be as follows, that is to say:-
My said invention comprises modifications of or improvements on the process.
described in my Patent Specification, No. 8847 of 1895, for converting gelatine, or
a gelatine-containing, or gelatigenous substance, into a compound permanently
soluble in cold water.
By my present invention, according to one modification I obtain the same result
at the ordinary temperature, without the aid of specially applied heat. I take, for
example, 100 parts of glue, preferably comminuted, 5 parts of slaked lime, and
100 parts of water. These I stir well together and allow to remain in an apartment
not specially heated until a colloid is formed which is perfectly soluble in cold
water. The time required depends on the quality of the glue, on its degree of
comminution, and on the prevailing temperature. With glue of good quality and.
moderate hardness the conversion takes place in a week or ten days.
According to another modification I first dissolve the glue in the water with the
aid of heat, and then allow the solution to cool until it has reached the ordinary
temperature and become a jelly. I comminute the jelly in any convenient way,.
as, for example, by pressing through wire gauze, squirting, or stirring; and I then
stir into it the slaked lime, mixing thoroughly. In the course of an hour or more,.
the time depending on the quality of the glue and on the prevailing temperature,
perfect liquefaction will have been attained.
Instead of caustic lime, other caustic alkaline earths may be employed; and
also caustic alkalies and their carbonates may be used if desired. Also the pro--
portions of the substances may be varied to some extent from those hereinbefore-
mentioned.
Dated this Seventh day of August 1896
EDMUND HUNT,
Applicant's Agent.
Improvements in Formation and Preparation of Soluble Colloids.
of the Gelatine Class.
I, EDMUND JAMES MILLS, D. Sc., F.R.S., of 60, John Street, in the County
of Glasgow, North Britain, Professor of Technical Chemistry, 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,.
that is to say:
My said invention comprises modifications of or improvements on the process

page_text: described in my Patent Specification, No. 8847 of 1895, for converting gelatine, or
a gelatine-containing, or gelatigenous substance, into a compound soluble in cold
'water.
By ny present invention according to one modification I obtain the same result
at the ordinary temperature, without the aid of heat specially applied in the
converting process. I take, for example, 100 parts of glue, preferably comminuted,
-5 parts of slaked lime and 100 parts of water. These I stir well together and
allow to remain in an apartment not specially heated until a colloid is formed
which is perfectly soluble in cold water. The time required depends on the
quality of the glue, on its degree of comminution, and on the prevailing temperature,
with glue of good quality and moderate hardness, the conversion takes place in a
week or ten days.
According to another modification I first dissolve the glue in the water with the
aid of heat, and then allow the solution to cool until it has reached the ordinary
temperature and become a jelly. I comminute the jelly in any convenient way, as,
for example, by pressing through wire gauze, squirting or stirring; and I then
stir into it the slaked lime, mixing thoroughly. In the course of an hour or more,
the time depending on the quality of the glue and on the prevailing temperature,
perfect liquefaction will have been attained.
Instead of caustic lime, other caustic alkaline earths may be employed; and
also caustic alkalies and their carbonates may be used if desired. Also the pro-
portions of the substances may be varied to some extent from those herein before
mentioned.
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 process of preparing from gelatine or a gelatine-containing or gelatigenous
substance, a colloid soluble in cold water by treating the same either dry or as a
jelly in a comminuted state with an alkaline substance without the aid of heat
substantially as herein before described.
Dated this Fourth day of May 1897
EDMUND HUNT,
Applicant's Agent.