Improvements in Preparing and Packing Materials for Forming Solutions Containing Arsenic, and applicable for Dipping Animals, Preserving Skins, for Destroying Germs, Parasites, and Weeds, and for other uses.
Year: 1893

page_text: PROVISIONAL SPECIFICATION.
Improvements in Preparing and Packing Materials for Forming
Solutions Containing Arsenic, and applicable for Dipping
Animals, Preserving Skins, for Destroying Germs, Parasites,
and Weeds, and for other uses.
I, ALFRED BLACKIE, of 97 Milton Street, Glasgow, in the County of Lanark,
North Britain, Manufacturing Chemist, do hereby declare the nature of this
invention to be as follows, that is to say:
My said invention has for its object the preparation and packing in an improved
and advantageous manner of arsenical compounds or mixtures suitable for forming
solutions applicable for various purposes.
Such compounds have hitherto been prepared and sold in the form of bulky and
heavy solutions, which are objectionable because of liability to leakage in transit,
of the heavy cost of carriage, of the large space occupied for storage, and of the
expensive packages required.
in carrying out my invention I take finely powdered dry caustic soda or caustic
potash or a mixture thereof, and ultimately mix it with a suitable supply of finely
powdered dry arsenious acid, by means of any suitable mechanical apparatus, care
The mixture thus formed has the
being taken to avoid access of moisture.
advantageous property of easily forming a suitable solution on the addition to it
of a proper quantity of water, the addition of the water causing an evolution of
heat which aids the combination of the arsenious acid and the alkali. No separately
applied heat is required for forming the solution, except in cases in which a com-
paratively large proportion of arsenious acid is, for any purpose, included in the
mixture.
The finely powdered and intimately mixed materials are, for storage or transport,
packed in vessels of any suitable kind which can be closed practically airtight˜ and
will exclude moisture.
I may state by way of example, that in making a compound suitable for animal
dipping, weed destroying, or analogous purposes, I mix three parts by weight of
When the preparation
caustic soda with eight parts by weight of arsenious acid.
is to be used a quantity, for example the contents of a package, is emptied into an
iron pail or other suitable vessel and about double its bulk of water is poured upou
it and the mixture stirred, whereupon a solution is speedily formed, which solution
may be subsequently diluted to any required degree.
The precise proportions will depend on the nature and quality of the chemicals
employed, and may also be varied to suit different requirements and applications.
The compound may be colored with a suitable coloring matter with the view of
distinguishing it from other white or uncolored preparations and of its presence
being at once noticed if it should by accident become mixed with other substances.
Dated this Fourteenth day of March 1893.
EDMUND HUNT,
Applicant's Agent,

page_text: COMPLETE SPECIFICATION.
Improvements in Preparing and Packing Materials for Forming
Solutions Containing Arsenic, and applicable for Dipping
Animals, Preserving Skins, for Destroying Germs, Parasites,
and Weeds, and for other uses.
I, ALFRED BLACKIE, of 97 Milton Street, Glasgow, in the County of Lanark,
North Britain, Manufacturing 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, that is to say :-
-
My said invention has for its object the preparation and packing in an improved
and advantageous manner, of arsenical compounds or mixtures and the forming,
in an advantageous manner, of solutions applicable for various purposes.
Such compounds have hitherto generally been prepared and sold in the form of
bulky and heavy solutions, which are objectionable because of liability to leakage
in transit, of the heavy cost of carriage, of the large space occupied for storage,
and of the expensive packages required.
In carrying out my invention 1 take finely powdered dry caustic soda, or caustic
potash, or a mixture thereof, and intimately mix it with a suitable quantity of finely
powdered dry arsenious acid, by means of any suitable mechanical apparatus, care
being taken to avoid access of moisture. The mixture which I form has the
advantageous property of easily forming a suitable solution on the addition to it
of a proper quantity of water, the addition of the water causing an evolution of
heat which aids the combination of the arsenious acid and alkali, and brings about
solution without requiring an objectionable excess of alkali for that purpose. No
separately applied heat is required for forming the solution, except in cases in
which a comparatively large proportion of arsenious acid is, for any special
purpose, included in the mixture.
The finely powdered and intimately mixed materials are, for storage or transport,
packed in vessels of tinned iron, or of any other suitable kind, which can be closed
practically airtight, and will exclude moisture.
In making a compound suitable for animal dipping, weed destroying, or analogous
purposes, I mix three parts by weight of caustic soda, or a like quantity of caustic
potash, with eight paits by weight of arsenious acid. When the preparation is to
be used, a quantity for example the contents of a package, is emptied into an ion
pail or other suitable vessel, and about double its bulk of water is poured on it and
the mixture stirred; whereupon a powerful evolution of heat takes place and a
solution is speedily formed, which solution may be subsequently diluted to any
required degree. The entire quantity of water for a dilute solution must not be
added to the dry powder at once because it that is done the temperature will not
become high enough to insure complete solution.
The precise proportions of the ingredients will depend on the nature and quality
of the chemicals employed, and may also be varied to suit different requirements
and applications. Whilst not restricting myself to the precise proportions, herein-
before mentioned by way of example, I may however point out that to increase
the quantity of alkali will not only diminish the proportion of arsenious acid which
is the effective agent, and increase the cost, but will also render the solution formed
undesirably caustic.
The compound may be colored with a suitable coloring matter with the view of
distinguishing it from other white or uncolored preparations, and of its presence
being at once noticed if it should by accident become mixed with other substances.
And the compound, formed as herein before described, may be sold alone, or it may
have combined or mixed with it in suitable proportion any substances which will
aid or
supplement its advantageous action, such for example as, crystallised
garbolic acid, flowers of sulphur, sulphide of arsenic, or sulphate of copper.

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 improved mode of preparing and packing mixtures of arsenious acid and
alkali, for forming solutions the said chemicals being combined or mixed in the
form of dry powders, in about the specified proportions substantially as and for the
purposes herein before described.
Datod this lilavouth day of Wantown 100
EDMUND HUNT,
Applicant's Agent.