Improved Method and Means for Congealing and Separating Solid Paraffin from Liquid Hydrocarbons.
Year: 1898

page_text: Date of Application, 13th Sept., 1898
Complete Specification Left, 13th June, 1899-Accepted, 5th Aug., 1899
Improved Method and Means for Congealing and Separating Solid
Paraffin from Liquid Hydrocarbons.
I, JOHN WISHART, General Manager, Oakbank Oil Company, Limited, 39, Saint
Vincent Place, in the City of Glasgow, do hereby declare the nature of this
invention to be as follows:-
This invention has for its object to simplify the process of recovering the solid
paraffin from paraffin or other hydrocarbons and the apparatus employed for the
purpose, by dispensing with the use of mechanical devices for scraping and
removing the solid paraffin congealing on the sides of refrigerating or cooling
apparatus or vessels and from which the liquid hydrocarbon is subsequently
separated in filter presses.
According to my invention the paraffin or other hydrocarbon in the liquid state
or as it leaves the still is forced by a pump directly into the filter presses through
piping carried through a refrigerating chamber or chambers or through brine or
other cooling medium so that the temperature of the hydrocarbon is so lowered
before it enters the filter presses that the solid paraffin congeals or solidifies and
is therein retained or separated out by filtration of the liquid hydrocarbon.
Dated this 12th day of September 1898.
Improved Method and Means for Congealing and Separating Solid
Paraffin from Liquid Hydrocarbons.
I, JOHN WISHART, General Manager, Oakbank Oil Company, Limited, 39, Saint
Vincent Place, in the City of Glasgow, 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 to simplify the process of recovering the solid
paraffin from liquid paraffin or other hydrocarbons and the apparatus employed for
the purpose, by dispensing with the use of mechanical devices for scraping and
removing the solid paraffin congealing on the sides of refrigerating or cooling
apparatus or vessels and from which the liquid hydrocarbon is subsequently
separated in filter presses.

page_text: According to my invention the paraffin or other hydrocarbon in the liquid state
or as it leaves the still is forced by a pump directly into the filter presses through
piping carried through a refrigerating chamber or chambers or through brine or
other cooling medium, so that the temperature of the hydrocarbon is so lowered
before it enters the filter presses that the solid paraffin congeals or solidifies and
is retained or separated out by filtration of the liquid hydrocarbon.
The accompanying drawing shows in vertical section the form of refrigerator I
prefer to employ in carrying out the invention. The liquid hydrocarbon is forced
in the direction indicated by arrows by means of a pump through the coil of
piping A which is placed within a closed vessel B through which the brine or
other refrigerant is passed, the latter being admitted by a pipe C and discharged
through a pipe 1 whilst a drain pipe with a cock is provided for emptying out the
vessel. The hydrocarbon passing through the coil of piping A and being cooled
therein to the requisite degree is delivered through the pipe A¹ to a filter press
through the filter cloth of which the liquid hydrocarbon exudes and passes off
whilst the paraffin solidified or congealed by the cooling process is retained and
formed into cakes in the press.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
1 claim is:
The herein described process of congealing and separating solid paraffin from
liquid hydrocarbons, said process consisting in forcing the liquid hydrocarbon
through piping placed in a chamber or vessel containing brine or other refrig-
erant and thence directly into a filter press wherein the solid paraffin is retained.
Dated this 12th day of June 1899
WALLACE FAIRWEATHER,
Of, the Firm of Cruikshank & Fairweather,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agent for the Applicant,