Improvements in Treating Cotton-seed Oil Mucilage to Obtain Soap.
Year: 1889

page_text: Date of Application, 2nd Apr., 1889
Complete Specification Left, 31st Dec., 1889-Accepted, 1st Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Treating Cotton-seed Oil Mucilage to Obtain Soap.
I, ISAAC PEARSON, of Rockvilla Oils Mills, Glasgow, in the County of Lanark, North
Britain, Seed Crusher and Oil Refiner, do hereby declare the nature of this Invention.
to be as follows, that is to say :-
My said Invention relates to the mucilage or residual matter separated from cotton-
seed oil in the ordinary process of refining such oil by means of alkali; and my object
is, by improved treatment to obtain from the mucilage, in an economical and expeditious
manner, a soap which can be applied to many useful purposes.
In carrying out my Invention I liquefy the mucilage with the aid of heat, preferably
employing for that purpose "close"-steam, that is, steam in closed pipes or jackets.
When the mucilage is liquid there is mixed with it a strong solution of caustic soda.
Or if the mucilage contains much water or has had water added to it whilst being
liquefied, the caustic soda may be added in a dry state. Into the mixture of mucilage
and caustic soda "open" steam is injected by means of a perforated pipe at the
bottom of the vessel containing the mixture; and the result of the operation is that
in an extremely short time the soap rises to the top of the liquid whilst nearly all the
dark coloring matter of the mucilage combines with the alkaline lye which remains
at the lower part of the vessel. As soon as the action which takes place on injecting
the open steam appears to be complete the steam is shut off, and then in a very few
minutes the alkaline lye may be drawn off from.beneath the soap, a practically complete
separation taking place between the soap and the lye as soon as the agitation caused
by the steam ceases. Or the soap may be removed leaving the alkaline lye for further
treatment if found desirable.
The destinguishing feature of the process hereinbefore described is the combination
of the operation of open steam with the use of an alkaline lye strong enough to throw
up the soap and if in any case the action of the open steam appears slower than it
should be, it will probably be owing to want of sufficient strength in the lye, and
small quantities of dry caustic soda should be added.
The soap after the separation of the alkaline lye may be washed with dilute alkali
and afterwards bleached with a suitable hypochlorite; and it may be subsequently
treated or finished in any suitable known way.
Dated this birst day of April 1889
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Treating Cotton-seed Oil Mucilage to Obtain Soap
I. ISAAC PEARSON, of Rockvilla Oil Mill, Glasgow, in the County of Lanark,
North Britain, Seed Crusher and Oil Refiner, 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 relates to the mucilage or residual matter separated from cotton-
seed oil in the ordinary process of refining such oil by means of alkali; and my object
is, by improved treatment, to obtain from the mucilage, in an economical, direct,
and expeditious manner, a soap which can be applied be to many useful purposes.
In carrying out my Invention I liquefy the mucilage with the aid of heat, preferably
employing for that purpose "close
steam, that is, steam in closed pipes or jackets.
When the mucilage is liquid there is mixed with it a strong solution of caustic soda.
Or if the mucilage contains much water, or has had water added to it whilst being
[Ꮮ Ꭺ ]

page_text: liquefied, the caustic soda may be added in a dry state. Into the mixture of mucilage
and caustic soda "open" steam is injected by means of a perforated pipe at the
bottom of the vessel containing the mixture; and the result of the operation is. that
in an extremely short time the soap rises to the top of the liquid, whilst nearly all
the dark coloring matter of the mucilage combines with the alkaline lye which remains
at the lower part of the vessel.
As soon as the action which takes place on injecting the open steam appears to be
complete, the steam is shut off, and then in a very few minutes the alkaline lye may
be drawn off from beneath the soap, a practically complete separation taking place
between the soap and the lye as soon as the agitation caused by the steam ceases.
will, however, generally be best to remove the soap, leaving the alkaline lye in the
vessel for any further treatment that may be found desirable.
It
The distinguishing feature of the process hereinbefore described for treating cotton-
seed-oil mucilage is the combination of the operation of 'open steam with the use of
soda lye strong enough to throw up the soap and separate it from liquor containing
surplus soda associated with coloring matter and other impurities derived from the
mucilage. I find that the quantity of caustic soda generally required in practice is
about 100 pounds (dry or weighed before solution) to every ton of the mucilage ;
but if, in any case, the action, during the injection of open steam, appears slower than
it should be, it will probably be owing to want of sufficient strength in the soda
lye, and small quantities of dry caustic soda or of a very strong solution thereof,
should be added.
The soap separated from the remaining alkaline lye and impurities may be washed
with dilute alkoli, and afterwards be bleached with a suitable hypochlorite; and it may
subsequently be treated or finished in any suitable known way.
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:
--
In treating cotton-seed-oil mucilage the combination of the operation of open steam
with the use of soda lye strong enough to throw up the soap and separate it from
surplus soda, coloring matter, and other impurities, substantially as hereinbefore
described.
Dated this Thirtieth day of December 1889.
EDMUND HUNT,
Applicant's Agent.