Improvements in the Distillation of Oils and other Viscous Liquids.
Year: 1890

page_text: Date of Application, 19th Apr., 1890
Complete Specification Left, 17th Jan., 1891-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Distillation of Oils and other Viscous Liquids.
We, JAMES DEWAR, of No. 1, Scroope Terrace, Cambridge, in the County of
Cambridge, Professor of Chemistry, and BOVERTON REDWOOD, of Ballard's
Lane, Finchley, in the County of Middlesex, Analytical Chemist, do hereby
declare the nature of this invention to be as follows:-
The distillation of many oils and other viscous liquids is attended with difficulty
and danger, owing to the sudden evolution of steam or vapour in the still or boiler.
Our invention has for its object to provide against danger from this cause, and to
render the boiling of the liquid tranquil and uniform.
For this purpose, instead of feeding the liquid that is to be distilled directly into
the still or boiler, as is usually done, we feed it into a compartment of the still head
or conduit through which the hot vapour from the still has to pass on its way to the
condenser. In this compartment we provide means of distributing the liquid that
is fed into it over an extended surface exposed to the vapour passing from the still;
a convenient method is to arrange in the compartment fragments of conducting
material, such, for instance, as turnings or planings of copper, and to cause the
liquid feed to trickle over them. By this means the more volatile portions of the
feed, including the water present, are carried off in vapour, leaving only the less
volatile portions to trickle down into the body of the still. Many oils which have
water mixed up with them cannot be distilled without great danger of explosive
ebullition when the mixed liquid is fed directly into the still. By feeding these in
the manner above described their distillation can be carried on with safety and
uniformity.
Dated this 10th dove of Anril 1800
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Distillation of Oils and other Viscous Liquids.
WC, JAMES DEWAR, of No. 1, Scroope Terrace, Cambridge, in the County of
Cambridge, Professor of Chemistry, and BOVERTON REDWOOD, of Ballard's Lane,
Finchley, in the County of Middlesex, Analytical 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 :-
The distillation of many oils and other viscous liquids is attended with difficulty
and danger, owing to the sudden evolution of steam or vapour in the still or boiler.
Our invention has for its object to provide against danger from this cause, and to
render the boiling of the liquid tranquil and uniform.
For this purpose, instead of feeding the liquid that is to be distilled directly into
the still or boiler as is usually done, we feed it into a compartment of the still
head or conduit through which the hot vapour from the still has to pass on its way
to the condenser. In this compartment we provide means of distributing the liquid
that is fed into it over an extended surface exposed to the vapours passing from
the still; a convenient method is to arrange in the compartment fragments of
conducting material, such, for instance, as turnings or planings of copper, and to
cause the liquid feed to trickle over them. By this means the more volatile
portions of the feed are carried off in vapour, leaving only the less volatile portions
to trickle down into the body of the still.
Many oils which have water mixed up with them cannot be distilled without

page_text: great danger of explosion, when the mixed liquid is fed directly into the still. By
feeding these in the manner above described their distillation can be carried on
with safety and uniformity.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
In distilling oils or other viscous liquids, providing against sudden evolution of
steam or vapour, by passing the liquid to be distilled on its way to feed the boiler or
still over an extended surface exposed to the hot vapour passing from the boiler or
still so as to cause free evaporation of the more volatile ingredients of the feed 1
liquid before they enter the boiler or still.
Dated this 17th day of January 1891
ABEL & IMRAY,
Agents for the Applicants.