TROYINIONAL BULEVA
Year: 1890

page_text: Date of Application, 30th Aug., 1890
Complete Specification Left, 13th Apr., 1891-Accepted, 23rd May, 1891
TROYINIONAL BULEVA
Improvements in or appertaining to the Production of Odourless
Wool Grease.
We, Dr. CARL AUGUST FEUERLEIN and JOHANN CARL LAHUSEN of the
North German Wool Carding and Worsted Yarn Spinning Factory, Delmenhorst,
near Bremen, in the Empire of Germany, do hereby declare the nature of this
invention to be as follows:-
In the recovery of wool grease from the waste water from wool washing and
combing factories, sulphuric or hydrochloric acid is usually added to such waste
water until the particles of grease and dirt contained in the water are separated.
In this manner, after being allowed to stand for several hours, the so-called grease
sludge is precipitated and the clear residual water is run off.
Through this treatment of the soapy water by means of mineral acids, the
sulphides contained in the wool yolk (sulphurets of soda, potash, ammonia, etcetera)
arc partially transformed into sulphuretted hydrogen. The grease sludge separated
by precipitation by means of mineral acids which forms the crude material for wool
grease, also contains for that reason a large quantity of sulphuretted hydrogen
which imparts to the wool grease manufactured from this grease sludge an
unpleasant odour which is not easily removed.
If, however, as provided by this invention, sulphurous acid be employed for the
precipitation instead of sulphuric or hydrochloric acids, the formation of sulphuretted
hydrogen is thereby prevented, the sulphides contained are then converted into
sulphites and hyposulphites as well as into free sulphur, and therefore into entirely
odourless products.
The working of the invention is carried out in the following manner :-
Sulphurous acid in a gascous or liquid form is added, under constant agitation, to
the soapy water heated to about 30 to 60 degrees Centigrade until the particles of
dirt and grease therein contained are separated therefrom. Then the stirring is
stopped and the mixture allowed to settle. Hereupon the grease sludge is
precipitated free from sulphides on the bottom of the tank, whilst the clear residual
water can be let off.
If in this precipitation, an excess of sulphurous acid be employed, the fermentation
and putrefaction of the soapy water, which sets in extremely rapidly, and acts very
deleteriously both on the wool grease and on the residual water, are simultaneously
and completely prevented.
The greasy sludge obtained in this manner is treated or concentrated in filter
presses and converted into wool grease in the usual manner, either by means of hot
pressing or by extraction.
The wool grease obtained by this means is then completely odourless.
A modification of the invention consists in treating the grease sludge, precipitated
by the old process by means of sulphuric or hydrochloric acid, when heated to
from 30 to 60 degrees Centigrade under constant agitation, with sulphurous acid in
a gaseous or liquid form, until all the sulphides therein contained (sulphuretted
hydrogen, sulphuret of soda, potash and ammonia, etcetera) are transformed into
sulphites and hyposulphites and sulphur.
Odourless wool grease is equally well obtained from the fat sludge treated in this
manner, by means of further treatment.
The fatty sludge precipitated according to the old process by means of sulphuric
or hydrochloric acids can also be first treated with some fat dissolving substance,
and then sulphurous acid in a gaseous or liquid form be introduced into the solution

page_text: thus obtained, until all the sulphides therein contained are converted into the
corresponding sulphites and hyposulphites as well as into free sulphur.
The fatty solution trented in this manner yields also after evaporation of the
dissolving solution, an odourless wool grease.
Dated this 29th day of August 1890.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or appertaining to the Production of Odourless
Wool Grease.
We, Dr. CARL. AUGUST FEVERLEIN and JOHANN CARL LAHUSEY of the
North German Wool Carding and Worsted Yarn Spinning Factory, Delmenhorst,
near Bremen, in the Empire of Germany, do hereby declare the nature of thi:
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
In the recovery of wool grease from the waste water from wool washing and
combing factories, sulphuric or hydrochloric acid is usually added to such waste
water until the particles of grease and dirt contained in the water are separated.
In this manner, after being allowed to stand for several hours, the so-called grense
sludge is precipitated and the clear residual water is run off.
Through this treatment of the soapy water by means of mineral acids, the
sulphides contained in the wool yolk (sulphurets of soila, potash, ammonia, etcetera)
are partially transformed into sulphuretted hydrogen. The grease sludge soparated
by precipitation by means of mineral acids which forms the crude material for wool
grease, also contains for that reason a large quantity of sulphuretted hydrogen
which imparts to the wool grease manufactured from this grease sludge an
unpleasant odour which is not easily removed.
If, however, as provided by this invention, sulphurous acid be employed for the
precipitation instead of sulphuric or hydrochloric acids, the formation of sulphuretted
hydrogen is thereby prevented, the sulphides contained are then converted into
sulphides and hyposulphites as well as into free sulphur, and therefore into entirely
odourless products.
The working of the invention is carried out in the following manner :-
Sulphurous acid in a gaseous or liquid form is added, under constant agitation, to
the soapy water heated to about 30 to 60 degrees Centigrade until the particles of
dirt and grease therein contained are separated therefrom. Then the stirring is
stopped and the mixture allowed to settle. 'Hereupon the grease sludge is precipitated
free from sulphides on the bottom of the tank, whilst the cloar residual water can be
let off.
If in this precipitation, an excess of sulphurous acid be employed, the fermentation
and putrefaction of the soapy water, which sets in extremely rapidly, and acts very
deleteriously both on the wool grease and on the residual water, are simultaneously
and completely prevented.
The greasy sludge obtained in this manner is treated or concentrated in filter
presses and converted into wool grease in the usual manner, either by means of hot
pressing or by extraction.
The wool grense obtained by this means is then completely odourless.
A. modification of the invention consists in treating the grease sludge, precipitated
by the old process by means of sulphuric or hydrochloric acid, when heated to
from 30 to 60 degrees Centigrade under constant agitation, with sulphurous acid in
a gascous or liquid form, until all the sulphides therein contained (sulphuretted
hydrogen, sulphuret of soda, potash and amumonia, etcetera) are transformed into
sulphites and hyposulphites and sulphur.

page_text: Odourless wool grease is equally well obtained from the fat sludge treated in this
manner, by means of further treatment.
The fatty sludge, precipitated according to the old process by means of sulphuric
or hydrochloric acids, can also be first treated with some fat dissolving substance
and then sulphurous acid in a gaseous or liquid form be introduced into the solution
thus obtained, until all the sulphides therein contained are converted into the
corresponding sulphides and hyposulphites as well as into free sulphur.
The fatty solution treated in this manner yields also after evaporation of the
dissolving solution, an odourless wool grease.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is :-
The application of sulphurous acid for the recovery of wool grease, in a state
having the least possible odours, from the waste waters from wool washing and
combing factories.
Dated tius II day or
Apri 1001
WM. P. THOMPSON & Co.,
Agents for the Applicants.
WM. P. THOMPSON & Co.,
Agents for the Applicants.