Improvements in the Manufacture of Sheep Dip.
Year: 1890

page_text: Date of Application, 17th Jan., 1890
Complete Specification Left. 17th Oct.. 1890-Accented. 29th Nov. 1890
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Sheep Dip.
I, GEORGE CRAIG, of Dalry, in the County of Ayr, Scotland, Chemist, do hereby
declare the nature of this invention to be as follows:-
This invention has for its object improvements in the method of producing improved
compounds for dipping sheep and for washing cattle for sanitary and other purposes;
and relates to that class of dips consisting of combinations of phenoloids with alkali
and sulphur. By phenoloids are meant phenol, cresol, xylenol and their homologues,
or any mixture thereof.
In carrying out the invention, suitable oil, derived from the tar of gas works, blast
furnaces, coke ovens or gas producers is agitated with a compound of alkali and
sulphur, preferably a polysulphide of sodium which may be made by the ordinary
chemical methods. Heat is applied during the agitation, and after settling, the
compound of phenoloids, alkali, and sulphur is separated from the supernatant oil and
may be further treated until of desired quality.
Dated this 16th day of January 1890.
DAVID F. MASON,
Glasgow, Patent Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Sheep Dip.
I, GEORGE CRAIG, of Blair Works, Dalry, in the County of Ayr, Scotland, 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:
This invention has for its object improvements in the method of producing improved
compounds for dipping sheep and for washing cattle for sanitary and other purposes,
and consists in producing from suitable oils compounds of phenoloids, alkaloids, alkali
and sulphur at one operation. By the term "alkaloids" as used in this Specification
is meant the nitrogenous bases present in the crude oils employed.
In carrying out the invention suitable crude oil or oils whether derived from the tar
of gas works, blast furnaces, coke ovens, or gas producers is agitated with a compound
of alkali and sulphur and preferably at a gentle heat.
The alkali I prefer to employ is caustic soda of a specific gravity 1-3 in which I
dissolve about 5% by weight of sulphur. This is easily effected by heating the soda
to 200° Fah. and adding the sulphur in fine powder and agitating. Such a solution
of course may be made by other well known chemical methods.
A quantity of the "alkaline" sulphide solution is then run into a vessel provided
with a mechanical agitator, and the suitable oil or oils run in in such quantity as will
yield phenoloids sufficient to saturate the charge of "alkalide" sulphide. The
quantities depend on the phenoloid contents of the oil treated, which may vary from
10 to 30% according to its source of production.
The mixture is gently heated (100° Fah. I find a convenient temperature) and
agitated until the "alkaline" sulphide has combined with the phenoloids and alkaloids
contained in the oil, when it is allowed to settle either in the agitator or in a settling
vessel.
The lower layer consists of the compound of alkali, phenoloids, alkaloids and sulphur
and is drained from the supernatant oil and may be further treated if not of the quality
and strength desired.

page_text: Under another modification I may first agitate the oil with the caustic soda lye and
obtain a compound of alkali, phenoloids and alkaloids. I then mix therewith a suitable
quantity of a compound of alkali, phenoloids and sulphur obtained by dissolving
purified phenoloids in "alkaline" solution containing about 13% of sulphur.
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.
The treatment of crude oils rich in phenoloids and alkaloids, with "alkaline"
sulphide, to produce compounds of phenoloids, alkaloids, alkali and sulphur, substan-
tially as hereinbefore described.
DAVID F. MASON,
Glasgow, Patent Agent.