Year: 1886

page_text: Date of Application, 2nd Sept., 1886.
Complete Left, 2nd June, 1887.
Complete Accepted, 24th June, 1887.
Material therefrom.
I, HUGO WALDEMAR LANGBECK of No. 127 Leman Street, Goodman's Fields in the
County of Middlesex, Analytical Chemist do hereby declare the nature of this
invention to be as follows:-
My Invention relates to the treatment of wool fat, either that which is known as
recovered fat, or that which may be recovered from lyes of wool washing after
neutralisation of their alkaline ingredients, for the separation therefrom of unguent
material in a pure and inodorous condition.
For this purpose, I first separate the fatty acids which may be done in either of
two ways, either by dissolving them out by the use of solvents consisting of alcohol
mixed with ether, chloroform, carbon bisulphide, acetone, benzoline or naphtha, or by
distilling them off, preferably by superheated steam. The latter method is to be
preferred as being more cheap and rapid than the method of solution.
The fatty residue after separation of the acids is then filtered through animal
charcoal, and this may be done in either of two ways; either by maintaining the
fatty matter in a fluid condition by heat applied to it and to the filter, or by first
dissolving the fatty matter preferably in benzoline or naphtha, and filtering the
solution. When the filtration is complete, the solution, if it was filtered in solution,
is distilled for recovery of the solvent. The filtered fatty material is then treated
repeatedly with a solvent consisting of alcohol mixed with any of the solvents
previously mentioned, ether, carbon bisulphide, chloroform, acetone, benzoline or
naphtha. I find a mixture consisting of 4 parts alcohol to 1 part carbon bisulphide
suitable for this part of the process. Steam is then blown through the fatty matter
until all traces of the solvent have disappeared, leaving a pure and inodorous fatty
residue. When this is to be used as a basis for ointments, 20 to 30 per cent. of water
is incorporated with it, by adding the water in successive small doses to the warm fat,
and beating it while it cools so as to mingle air with it, thus producing a yellowish
white greasy material which is entirely free from smell.
Dated this 2nd dow of Contohan 1000
ABEL & IMRAY,
28, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
A Process for the Treatment of Wool Fat to Produce Unguent
Material therefrom.
I, HUGO WALDEMAR LANGBECK, of No. 127 Leeman Street, Goodman's Fields in
the County of Middlesex, Analytical Chemist, 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 :-
My invention relates to the treatment of wool fat, either that which is known as
recovered fat, or that which may be recovered from leys of wool washing after
neutralisation of their alkaline ingredients, for the separation therefrom of unguent
material in a pure and inodorous condition.
For this purpose, I first separate the fatty acids which may be done in either of
two ways; either by dissolving them out by the use of solvents consisting of alcohol
mixed with ether, chloroform, carbon bisulphide, acetone, benzoline, or naphtha, using
by preference a mixture of 4 parts of alcohol with 1 part of carbon bisulphide; or by
distilling them off, preferably by superheated steam.
The fatty residue after separation of the acids is then treated with charcoal, either
by filtration through it in a dissolved or melted condition, or by preference as herein-
after described, after which, steam or warm air is blown through the fatty matter
until all traces of the solvent have disappeared, when such has been used, leaving a
pure and inodorous fatty residue.
When this is to be used as a basis for ointments, 20 to 30 per cent. of water
is incorporated with it, by adding the water in successive small doses to the fat.
Instead of first separating the fatty acids and then treating the residue with
charcoal, as above described, the raw fat may be first treated with the animal charcoal
and the separation of the fatty acids be afterwards effected, but I prefer the method
of operating first described.
In practically carrying out my above described invention I proceed as follows:-
The raw wool fat is introduced into a suitable pan made either of copper tinned or
nickel plated inside, or an enamelled iron pan, or made of wood, fitted with a steam
coil and a stirring apparatus. Steam is then let on, and when the fat is melted the
solvent or solvents is or are introduced and mixed intimately with the fat by means of
the stirring apparatus. The fat is then allowed to separate by subsidence and the
solvents are drawn off, and this treatment is repeated with fresh solvents until the
wool-fat is perfectly free from fatty acids, cholesterin and isocholesterin.
The remaining fat is then again heated to drive off the last traces of solvents and
is thoroughly mixed while warm with charcoal or animal charcoal or by preference
the charcoal which is left behind in making prussiate of potash and which is called
"Prussia waste."
After having been left in contact with the charcoal whilst warm, and stirring
occasionally for about 6 or 8 hours, benzine, naphtha, carbon bisulphide or acetone is

page_text: introduced into the mass in order to dissolve the purified wool fat which is then
separated from the charcoal or prussia waste by means of a filter press.
The solvent is then recovered by distillation and the last traces of the solvent driven
off by blowing steam or warm air through the fat.
The purified wool-fat after having been separated from the condensed steam is then
of a yellowish colour free from smell.
When this fat is to be used as basis for ointments, pomatums, etc., 20 to 30 per cent.
of water or peroxide of hydrogen is incorporated with it by adding the water or
peroxide of hydrogen in successive small doses, thus producing a white material which
I call superlanol.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed I declare that what I claim is :-
Treating wool fat for the production of unguent material therefrom by first
separating the fatty acids from the raw material either by solvents such as a mixture
of alcohol and carbon bisulphido, or by distillation, and then treating the residue
while in a melted or dissolved condition with charcoal, the solvent being afterwards
separated from the purified fat by distillation, substantially as herein described.
Dated this 2nd day of June 1887
ABEL & IMRAY,
Agents for the Applicant.