Improvements in Recovering Grease from Waste Suds which have been used in Washing Wool, Hair, or other Fibre.
Year: 1893

page_text: Date of Application 14th Sept., 1893
Complete Specification Left, 16th July, 1894-Accepted, 3th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in Recovering Grease from Waste Suds which have
been used in Washing Wool, Hair, or other Fibre.
I, ARTHUR JAMES INSTON of Oxford Street, Kidderminster in the County
of Worcester, Merchant, do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to recover in an economical manner the grease
contained in the waste suds which are usually run off after the completion of the
washing of wool, hair or other fibre. These suds are composed of water, soap,
alkali and the natural oils which have become separated from the fibre in the
washing process.
According to a mode which is frequently adopted for recovering the grease, the.
waste suds are run into tanks and sulphuric acid is mixed with them. The acid
The fatty or oily
collects the fatty or oily portion and the rest is run off to waste.
portion is then pressed and the solid grease eventually obtained is known in the
market as recovered grease." This mode of recovering the grease is however of
little commercial value because of the use of sulphuric acid.
«
Now according to my invention I recover the grease from waste suds without the
use of sulphuric or other acid.
According to my invention, after first by preference filtering or straining the
suds so as to separate dirt and impurities therefrom, I boil them with a sufficient
addition of alkali (caustic potash, caustic soda, or other alkali) or of oil, tallow or
other suitable fatty or oleaginous material, or of both alkali and oil, tallow or other
fatty or oleaginous material to solidify part or the whole of the suds as may be
required. I thereby recover the grease from the suds with the aid of alkali or
of oil or fatty material or of alkali and oil or fatty material and without using
any acid.
The resulting product, that is to say, the mixture of the grease in the suds and
the alkali or the oil or fatty material or the alkali and fatty material added
thereto may in turn be utilized in recovering grease from waste suds or for other
purposes and if found necessary in order to make it into a more compact solid form
it may be submitted to pressing.
Dated this 14th day of September 1893.
J. C. MEWBURN,
55 and 56, Chancery Lane, London, Chartered Patent Agent.
COMPLETE
SPECIFICATION.
Improvements in Recovering Grease from Waste Suds which have
been used in Washing Wool, Hair, or other Fibre.
I, Arthur JamES INSTON of Oxford Street, Kidderminster, in the County
of Worcester, Merchant, 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 :-
The object of my invention is to recover in an economical manner the grease
contained in the waste suds which are usually run off after the completion of the
washing of wool, hair or other fibre. These suds are composed of water, soap,

page_text: alkali and the natural oils which have become separated from the fibre in the
washing process.
According to a mode which is frequently adopted for recovering the grease, the
waste suds are run into tanks and sulphuric acid is mixed with them. The acid
collects the fatty or oily portion and the rest is run off to waste. The fatty or
oily portion is then pressed and the solid grease eventually obtained is known in
the market as "recovered grease." This mode of recovering the grease is, however,
of little commercial value because of the use of sulphuric acid.
According to my invention. I recover the grease from waste suds without the use
of sulphuric or other acid.
In carrying out my invention I take the suds as they come from the wool
washings and separate as far as practicable the dirt and impurities therefrom by
straining or filtration. I then place them in a boiler and heat them to boiling.point
adding an alkali such as caustic soda, caustic potash, or the 'like and I keep up the
boiling for about two hours.
'The hot liquor is now withdrawn and led into suitable tanks. On the 'liquor
cooling the grease will be found in a solid or viscous state at the top; and the waste
liquor together with any sediment can be run off. as soon as the cooling and settling
have taken place. The grease thus obtained can be dried or pressed in the
ordinary way.
The quantity of alkali to be used will depend upon the quantity of grease in the
suds, but in ordinary cases it will be found sufficient to add 10 pounds of caustic
soda and 10 pounds of salt or other alkali to every ton of suds.
In lieu of alkali I can use oil, tallow or other oleaginous material of a similar
character. In carrying out my invention with oil or other oleaginous material it
will in ordinary cases be found sufficient to add 20 parts of oil or other oleaginous
material to 100 parts of suds and the boiling should continue for about two hours.
Or I can use a mixture of alkali and oil or oleaginous material, suitable
proportions being 40 pounds of alkali and 4 hundredweight of oil to one ton
of suds.
In all cases the resulting product, that is to say the mixture of the grease from
the suds and of the alkali or fatty material, or the alkali and fatty material, added
thereto may in turn be utilized in recovering grease from a'further quantity of suds,
or for other purposes.
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. The method of recovering grease from waste suds without the use of acid,
which consists in heating the suds together with alkali, substantially as hereinbefore
described.
2. The method of recovering grease from waste suds without the use of acid
which consists in heating the suds together with oil, tallow or other fatty or
oleaginous material, substantially as hereinbefore described.
3. The method of recovering grease from waste suds without the use of acid,
which consists in heating the suds together with alkali and oil, tallow or other fatty
or oleaginous material substantially as hereinbefore described.
Dated this 16th der of Tul 1904
J. C. MEWBURN & ELLIS,
55 and 56, Chancery Lane, London, Patent Agents.