Improvements in the Manufacture of Chloride of Aluminium with other Chlorides.
Year: 1888

page_text: Date of Application, 31st Aug., 1888
Complete Specification Left, 27th May, 1889-Accepted, 29th June, 1889
VISIONAL SPECIFICATION.
Improvements in the Manufacture of Chloride of Aluminium with
other Chlorides.
1, WILLIAM WHITE of Church Fields, Cheshunt, Herts, Journalist, do hereby declare
the nature of this invention to be as follows: --
Chloride of Aluminium with Chloride of Sodium is usually obtained by passing
Chlorine over a mixture of Alumina, tarhon and Chloride of Sodium at a red heat,
when the Aluminium deoxidised by the Carbon unites with the Chlorine, and passes
off as Chloride of Aluminium in union with the Chloride of Sodium.
I find that dry Sulphate of Aluminium fuses with several of the Chlorides, such as
the Chlorides of Potassium, Sodium and Calcium, necompanied with the evolution of
more or less Aluminium Chloride; but for my purpose prefer to use one of the
Alums, as of Potash or Soda. The Alum is dried thoroughly, powdered, and
intimately mixed with sufficient Chloride of Potassium or Sodium to convert the
Aluminium of the Alum into Chloride of Aluminium and to form with the same a
double Chloride. The mixture is fused in a suitable crucible or refort; the double
Chloride of Aluminium and Potassium, or Sodium, sublimes, and is collected, condensed
and preserved from access of moisture, whilst the Sulphate of Potassium, or Sodium,
which remains is available for many uses.
Dated this 30th day of August 1888
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Chloride of Aluminium with
other Chlorides.
1. WILLIAM WHITE of Laurels, Cheshunt, in the County of Herts, Journalist, 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:
Chloride of aluminium in association with chloride of sodium is usually obtained by
passing chlorine over a mixture of alumina, carbon, and chloride of sodium at a red
heat. The alumina deoxidised by the carbon, unites with the chlorine, and volatilises
in conjunction with the chloride of sodium.
I find that dry aluminium sulphate fuses with several of the chlorides, such as the
chlorides of potassium, sodium and calcium, accompanied with the evolution of some
aluminium chloride; but for my purpose I prefer to use one of the alums, as of potash
or soda; the reason being that these alums crystallise with more complete freedom
from impurities, while the presence of potassium or sodium sulphate essentially
contributes to the liberation of the desired aluminium chloride. The alum is dried
thoroughly, powdered and mixed intimately with sufficient potassium or sodium
chloride to convert the aluminium of the alum into aluminium chloride, and to form
with the same a double chloride. The mixture is fused at a red heat in a suitable
crucible or retort, when the double chloride of aluminium and potassium, or of
aluminium and sodium sublimes, and is collected and condensed, and carefully
preserved from access of moisture, leaving potassium or sodium sulphate as the
residue.

page_text: 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 I
claim is-
The production of chloride of aluminium with chloride of potassium or sodium by
means of the reaction at a red heat of the chloride of potassium or sodium upon potash
or soda alum substantially as herein described.
Dated thin 95th day of Mo 1880
WILLIAM WHITE.