Improvements in the Manufacture or Treatment of, Varnish, Oils,, and the like, and in Apparatus therefor.
Year: 1891

page_text: Date of Application, 25th June, 1891
Complete Specification Left, 24th Mar., 1892-Accepted, 4th June, 1892.
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture or Treatment of, Varnish, Oils,,
and the like, and in Apparatus therefor.
We, OTTO CHRISTIAN HAGEMANN of Hillthorpe, Sydenham Hill, Chemical
Engineer, and THOMAS CASSINET PALMER, of 98, Cominercial Road, Engineer,
both in the County of London, do hereby declare the nature of this invention to.
be as follows:-
:-
Our invention relates chiefly to the clarification of varnish and fatty oils.
In clarifying varnish and fatty oils a very considerable quantity of varnish or
oil is now often lost owing to the great difficulty of treating what are known as
the varnish or oil bottoms or foots which are an intractable sort of viscid, pulp,
in which the impurities are in an extremely fine state of subdivision.
Now we have discovered that by placing, such bottoms or foots into a drum
and. subjecting the same to centrifugal action of high velocity, the impurities
combine into a layer near the peripheral walls of such drum leaving the varnish or
oil in the centre clarified so that it can be conveniently removed.
We sometimes add water, or its equivalent, to the impure foots while subjected
to this process, the water allowing the transmission through it of impurities, but
not of the varnish or oil, which latter thus can be more completely collected.
The drum which we advantageously use is unperforated.
Dated the 25th day of June 1891
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Manufacture or Treatment of Varnish, Oils,
and the like, and in Apparatus therefor.
We, OTTO CHRISTIAN HAGEMANN, of Hillthorpe, Sydenham, Chemical
Engineer, and THOMAS CASSINET PALMER, of 98, Commercial Road, Engineer,
both in the County of London, 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 relates to the treatment of varnish, fatty oils, fats and the like
for the purpose of clarifying the same.
The method hitherto frequently adopted of clarifying varnishes, fatty oils and
the like consisted in placing the same in tanks and allowing them to remain for
sufficient time for the impurities to precipitate by gravitation. This process not
only occupies a very considerable time but is defective in so far that owing to the
peculiar nature of the impurities these will not precipitate beyond a certain
degree. Furthermore after the varnishes or oils or the like purified according to
this method have been removed from the tanks there remains what is known as
varnish or oil bottoms or foots which is an intractable sort of viscid pulp consisting
of varnish or oil having the impurities therein in an extremely fine state of sub-
division, so that a considerable quantity of varnish is lost.
Now we have discovered that by subjecting varnishes, fatty oils or the like or
the bottoms or foots resulting from the ordinary process of clarification to centri-
fugal action of high velocity in an unperforated centrifugal drum, the impurities
form a layer against the peripheral walls of such drum, leaving the varnish or oil
in the centre whence it can be skimmed off in a well known manner.

page_text: When treating bottoms or foots we sometimes add water or other suitable liquid
during the centrifugal action, the liquid allowing the transmission through it of
impurities but not of the varnish or oil, which latter can thus be collected.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The described process for clarifying varnishes or fatty oils or fats or varnish
or oil bottoms or foots, such process consisting in subjecting such materials to
centrifugal action of high velocity in an unperforated drum, substantially as
described.
2. In the purification of varnishes, fatty oils or fats or varnish or oil bottoms or
foots by the process referred to in the preceding claiming clause, the addition of
water or other liquid during the centrifugal action, substantially as described.
Dated the 24th day of March 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.