provements in the Formation and Preparation of Soluble Colloids, such as Gelatine and Isınglass
Year: 1895

page_text: Date of Application, 4th May, 1895
Complete Specification Left, 1st Feb, 1896-Accepted, 18th Apr, 1896
PROVISIONAL SPECIFICATION
Improvements in the Formation and Preparation of Soluble Colloids,
such as Gelatine and Isınglass
I, EDMUND JAMES MILLS, D Sc, FRS, of 60 John Street, in the County
of Gla gow, 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 has for its object to render soluble in cold water and
advantageously or conveniently applicable for various useful purposes cert un
colloids, such as gelatine and singlass, which are ordinarily insoluble in cold
water Such colloids have been rendered soluble in cold water by treatment with
an acid such as acetic acid, but for many technical purposes the presence of an acid
is objectionable
2
In carrying out my invention according to one modification, I take gelatine or
a gelatine-containing or gelatıgenous substance, and add to it a fixed alkalı
(either caustic or carbonated but preferably caustic) or a caustic alkaline earth,
and heat the mixture with water In short time, a gelatine compound is formed
which remuns permanently liquid in the cold The proportions of alkaline
material depend partly upon the nature of the gelatine under treatment
fan sample of gelatine can, in general, be permanently liquefied by heating to
100 degiees, Centigrade, with about five times its weight of water and one-
twentieth of its weight of slaked lime for two hours
but a
I seed it with microbes
According to another modification a gelatine or a gelatine containing or
gelatıgenous substance is dissolved in water, the amount of which may conveniently
be about ten times the weight of an ordinary gelatine
The solution must be
kept at a temperature distinctly above the setting point
capable of permanently liquefying gelatine Bacillus liquefaciens, for example
succeeds well After three days, it will generally be found that the solution
remains permanently liquid in the cold Ihe action of the microbes may be
facilitated or expedited by the addition of a small proportion of meat extract,
together with a trace of sodic carbonate
By either of the herein before de cribed modifications of process, 1 obtain non-
corrosive colloid products of considerable technical value as gums, thickeneis,
detergents, emulsifiers, media for photolithographic and other photographic
purposes, and the like
Dated the Third day of Mov 1895
LDMUND HUNT,
Applicants Agent
Improvements in the Formation and Preparation of Soluble Colloids,
such as Gelatine and Isinglass
I, EDMUND JAMES MILLS, D Sc, FRS, of 60 John Street, in the County
of Glasgow, North Britain, Professor of Technical Chemistry, do hereby declue
the nature of this invention and in what mauner 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 has for its object to render soluble in cold water, and

page_text: advantageously or conveniently applicable for various useful purposes, certain
colloids, such as gelatine and singlass, which are ordinarily insoluble in cold
water Such colloids have been rendered soluble in cold water by treatment with
an acid such as acetic acid, but for many technical purposes the presence of an
acid is objectionable
In carrying out my invention according to one modification, I take gelatine or
a gelatine-containing or gelatıgenous substance, and add to it a fixed alkalı
(either caustic or carbonated but preferably caustic) or a caustic alkaline earth,
and heat the mixture with water In a short time a gelatine compound is formed
which remains permanently liquid in the cold The proportions of alkaline
material depend partly on the nature of the gelatine under treatment, but a fair
sample of gelatine can, in general, be permanently liquefied by heating to
100 degrees, Centigrade, with about five times its weight of water, and one-
twentieth of its weight of slaked lime, for two hours
water will in many cases suffice
A smaller pioportion of
gelatine-containing, or
which may, conveniently,
The solution must be
According to another modification a gelatine, or
gelatigenous substance is dissolved in water, the amount of
be about ten times the weight of an ordinary gelatine
kept at a temperature distinctly above the setting point I seed it with microbes
capable of permanently liquefying gelatine Bacillus liquefaciens, for example,
succeeds well After three days, it will generally be found that the solution
iemains permanently liquid in the cold The action of the microbes may be
facilitated or expedited by the addition of a small proportion of meat extract,
together with a trace of sodic carbonate
The product obtained by either modification may be clarified by decantation or
by filtration
By either of the herein before described modifications of process,
I obtain non-
corrosive colloid products of considerable technical value as gums, thickeners,
detergents, emulsifiers, media for photo-lithographic and other photographic
purposes, and the like
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
-
1 Obtaining an aqueous solution which is permanently liquid at the ordinary
temperature, by treating a colloid such as gelatine or singlass ordinarily insoluble
in cold water, with an alkaline substance with the aid of heat, substantially as
herein before described
2 Obtaining an aqueous solution which is permanently liquid at the ordinary
temperature, by treating a colloid such as gelatine or singlass ordinarily insoluble
in cold water, with a suitable microbe with the aid of heat, substantially as
herein before described
Dated then Thounench Inm
Tomm
1800
EDMUND HUNT,
Applicant's Agent