Year: 1886

page_text: Date of Application, 28th Dec., 1886
Complete Left, 26th Oct., 1887
Complete Accepted, 27th Dec., 1887
I, ALFRED WILLIAM MAC ILWALNE, of Kingston-upon-Hull, in the County of
York, Gentleman, do hereby declare the nature of this invention to be as follows:-
The extraction of oils by volatile solvents has until recently been usually carried
out in iron vessels. In the case of some oils when in solution in the solvent, iron has
a deleterious effect upon their colour. This is especially so in the case of rape-
seed oil.
In the specification filed in pursuance of my application for Letters Patent dated
15th March 1886, No. 3644, means are described for providing against the injurious
effect above alluded to; such means consisting in the use of vessels constructed of or
lined with lead or other suitable metal or alloy.
My present invention consists in the employment, in the extraction of oils by
volatile solvents, of vessels formed of or lined with certain materials other than those
specified in my aforesaid previous specification.
According to one mode of carrying out my present improvements, I construct the
vessels of iron or other suitable metal or non-porous material of adequate strength and
line the same with wood.
According to another method, I employ slabs of marble, slate, earthenware, stone-
ware, porcelain or glass, in the construction of the vessels; such slabs being cemented
or otherwise jointed together and held in place by tie-rods or supported by framework,
which latter may be of iron or wood. When the material employed is sufficiently
porous to permit the passage of the spirit, the surface exposed to the solution is
glazed or enamelled. Or the vessels may be constructed of iron or other suitable
metal or non-porous material of adequate strength, and lined with marble, slate,
earthenware, stoneware, porcelain or glass.
According to another modification, I employ vessels constructed of iron or other

page_text: suitable metal, and having the working faces protected by enamel or by a coating of
lead or tin applied by what is known as the galvanising process.
Instead of employing pipes composed of or coated with lead or other suitable metal
or alloy, as proposed in my aforesaid previous specification, for heating the solution
and evaporating the solvent, steam heated pipes or chambers, formed of or covered
with certain of the aforesaid non-injurious materials, may be employed; such heating
pipes or chambers being immersed in the solution under treatment.
Dated 14L 1
D
1
1000
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C.,
Agent for the Applicant.

page_text: I, ALFRED WILLIAM MAC ILWAINE, of Kingston upon Hull, in the County of York,
Gentleman, 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 extraction of oils by volatile solvents has until recently been carried out in
iron vessels. In the case of some oils when in solution in the solvent, iron has
a deleterious effect upon their colour. This is especially so in the case of rape-
seed oil.
In the specification filed in pursuance of my application for Letters Patent dated
15th March, 1886, No. 3644, means are described for providing against the injurious
effect above alluded to, such means consisting in the use of vessels constructed of or
lined with lead or other suitable metal or alloy.
My present invention consists in the employment in the extraction of oils by
volatile solvents of vessels formed of or lined with certain materials other than those
specified in my aforesaid previous specification.
According to one mode of carrying out my present improvements, I construct the
vessels of iron or other suitable metal or non-porous material of adequate strength and
line the same with wood, which I find to be specially advantageous, as it enables
great economy to be effected in the construction of the apparatus without sacrificing
efficiency.
According to another method, I employ slabs of marble, slate, earthenware, stone-
ware, porcelain or glass in the construction of the vessels; such slabs being cemented
or otherwise joined together and held in place by tie-rods or supported by framework,
which latter may be of iron or wood. When the material employed is sufficiently
porous to permit the passage of the spirit, the surface exposed to the solution is glazed
or enamelled. Or, the vessels may be constructed of iron or other suitable metal or
non-porous material of adequate strength and lined with marble, slate, earthenware,
stoneware, porcelain or glass.
According to another modification, I employ vessels constructed of iron or other
suitable metal and having the working faces protected by enamel or by a coating of
lead or tin applied by what is known as the galvanising process.
Instead of employing pipes composed of or coated with lead or other suitable metal
or alloy as proposed in my aforesaid previous specification for heating the solution
and evaporating the solvent, steam-heated pipes or chambers covered with the afore-
said non-injurious materials may be employed, such heating pipes or chambers being
immersed in or applied to the solution under treatment.

page_text: Having thus particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, I claim :-
1. Providing vessels or apparatus employed in the extraction of oils by volatile
solvents with protective linings or coverings of wood or of marble, slate, earthenware,
stoneware, porcelain or glass, for the purposes set forth.
2. Constructing vessels or apparatus employed in the extraction of oils by volatile
solvents of marble, slate, earthenware, stoneware, porcelain or glass for the purpose
of preserving the oil froin discolouration as described.
3. Providing vessels or apparatus employed in the extraction of oils by volatile
solvents with protective coatings of enamel, or of lead or tin applied by the galvanising
process, for the purpose set forth.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.Č.,
Agent for the Applicant.