IMPROVEMENTS IN THE USE AND APPLICATION OF AN INORGANIC GLYCERIC ETHER
Year: 1866

page_text: LETTERS PATENT to Alfred Paraf, of the City of Manchester, in the
County of Lancaster, Chemist, for the Invention of "IMPROVEMENTS IN
THE USE AND APPLICATION OF AN INORGANIC GLYCERIC ETHER."
Sealed the 15th February 1867, and dated the 17th August 1866.
PROVISIONAL SPECIFICATION left by the said Alfred Paraf at the Office
of the Commissioners of Patents, with his Petition, on the 17th August
1866.
I, ALFRED PARAF, of the City of Manchester, in the County of Lancaster,
Chemist, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN THE USE AND APPLICATION OF AN INORGANIC GLYCERIC ETHER," to be as
follows:-
I have observed that when arsenious acid is heated with glycerine it
loses the common properties of arsenious acid and acquires properties
quite different from those of the ordinary arsenites, it forms, in fact, an
arsenious ether of glycerine, which has a neutral reaction, and contains a
large proportion of arsenic in solution, (glycerine heated with arsenious
acid dissolves its own weight), and a neutral arsenite being of great value
as a dunging salt in madder dyeing, I have applied it for this purpose.
Furthermore, owing to its properties of suffering decomposition in contact
with water and steaming into insoluble arsenious acid and glycerine, I
find it to be a valuable fixing agent for soluble colors, especially coal tar
colors, upon textile fabrics or yarns, on which I operate as follows:-I dissolve

page_text: one part of arsenious acid in one part of glycerine by heating both together;
then I take one pound weight of this so-formed arsenious glyceric ether with
two ounces of any crystallized aniline color dissolved in two pounds of water
and thickened with starch. After printing I steam for half to three-quarters
of an hour, when by the decomposition of this arsenious ether the arsenious
acid is made insoluble in the cloth and fixes the coloring matter.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Alfred Paraf in the Great Seal Patent Office on the 15th
February 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALFRED
PARAF, of the City of Manchester, in the County of Lancaster, Chemist,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of August, in the year of our Lord
One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Alfred Paraf, Her special licence that I, the said Alfred Paraf, my
executors, administrators, and assigns, or such others as I, the said Alfred
Paraf, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN THE
USE AND APPLICATION OF AN INORGANIC GLYCERIC ЕTHER," upon the condition,
amongst others, that I, the said Alfred Paraf, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same
to be filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Alfred Paraf, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement (that is to say): :-
I have observed that when arsenious acid is heated with glycerine it loses
the common properties of arsenious acid and acquires properties .quite

page_text: different from those of the ordinary arsenites, it forms, in fact, an arsenious ether
of glycerine which has a neutral reaction and contains a large proportion of
arsenic in solution, (glycerine heated with arsenious acid dissolves its own
weight), and a neutral arsenite being of great value as a dunging salt in
madder dyeing, I have applied 'it for this purpose. Furthermore, owing to
its properties of suffering decomposition in contact with water and steaming
into insoluble arsenious acid and glycerine, I find it to be a valuable fixing
agent for soluble colors, especially coal tar colors, upon textile fabrics or yarns,
on which I operate as follows:-I dissolve one part of arsenious acid in
one part of glycerine by heating both together; then I take one pound of
this so-formed arsenious glyceric ether with two ounces of any crystallized
aniline color dissolved in two pounds water and thickened with starch. After
printing I steam for from one-half to three-quarters of an hour, when by the
decomposition of this arsenious ether the arsenious acid is made insoluble in
the cloth and fixes the coloring matters.
In witness whereof, I, the said Alfred Paraf, have hereunto set my band
and seal, this Seventeenth day of January, in the year of our Lord
One thousand eight hundred and sixty-seven.
ALFRED PARAF. (L.S.)