The Utilisation of Bye Products Resulting from the Manufacture or Production of Certain Phosphorus Compounds.
Year: 1887

page_text: Date of Application, 23rd May, 1887
Complete Left, 22nd Feb., 1888
Complete Accepted, 29th Mar., 1888
The Utilisation of Bye Products Resulting from the Manufacture or
Production of Certain Phosphorus Compounds.
1 PAUL GEORGE WILLIAM TYPKE of Fairlawn, New Malden, Surrey, Chemical
Manufacturer, do hereby declare the nature of this invention to be as follows:-
Hitherto the phosphoretted hydrogen gas given off in the manufacture of the salts
of hypophosphorous acid (known as the hypophosphites) obtained by the action of
phosphorus and water upon the alkalies, alkaline earths, or sulphides of the alkaline
earths; or, by the action of water upon the phosphides of the alkalies or alkaline
earths, has been either allowed to escape unutilised, or, otherwise, has been simply
converted into the comparatively invaluable chemical, phosphoric acid.
Now, in accordance with my invention, I deal with or treat the phosphoretted
hydrogen as follows, with the view to convert same ultimately into hypophosphites.
The gases and steam resulting from the process of manufacture usually followed,
are first cooled-so as to deprive them of the greater portion of the water vapour-
by passing same through a series of pipes exposed to the cooling action of the
atmosphere or of cold water or otherwise as may be desired or found most convenient
in practice. When sufficiently cooled, said gases are conducted through a tube heated
in a furnace, said tube being filled preferably with pieces of calcium oxide (or
unslacked lime); though however instead of using said substance, the tube aforesaid
may be filled with the oxides of any of the alkaline earths or even their carbonates
in a porous form.
By following the process above described I obtain the valuable product phosphide
of calcium or of any of the alkaline earths accordingly as to which of these I may
employ as the material with which the tube last above referred to is filled-Said

page_text: phosphides so obtained are then converted by the action of water into hypophosphites
and phosphoretted hydrogen; the phosphoretted hydrogen gas given off being treated
in the same manner as that above described at the outset of the process followed by
me in accordance with my invention.
JAMES STEVENSON,.
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.
The Utilisation of Bye Products Resulting from the Manufacture or
Production of Certain Phosphorus Compounds.
I PAUL GEORGE WILLIAM TYPKE of Fairlawn, New Malden, Surrey Chemical
Manufacturer 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 :-
Hitherto the phosphoretted hydrogen gas given off in the manufacture of the
Salts of hypophosphorous acid (known as the hypophosphites) obtained by the action
of phosphorus and water upon the alkalies, alkaline earths, or sulphides of the
alkaline earths, or, by the action of water upon the phosphides of the alkalies or
alkaline earths, has been either allowed to escape unutilised, or, otherwise, has been
simply converted into the comparatively invaluable chemical phosphoric acid.
Now in accordance with my invention, I deal with or treat the phosphoretted
hydrogen as follows, with the view to convert same ultimately into hypophosphites.
The gases and steam resulting from the process of manufacture usually followed are
first cooled so as to deprive them of the greater portion of the water vapour by
passing same through a series of pipes exposed to the cooling action of the atmosphere
or of cold water or otherwise as may be desired or found most convenient in practice.
When sufficiently cooled, said gases are conducted through a tube (which may be
of iron, fire-clay, or other suitable material) heated in a furnace, said tube being filled
preferably with pieces of Calcium Oxide (or unslacked line) though however instead
of using said substance, the tube aforesaid may be filled with the oxides of any of the
alkaline earths or even the carbonates in a porous form.

page_text: By this treatment the phosphoretted Hydrogen gas is entirely decomposed; its
phosphorus combining with the Calcium of the Calcic Oxides to form Phosphide of
calcium and its Hydrogen combining with the oxygen of the Calcic Oxide to form
Water.
By following the process above described I obtain the valuable product Phosphide
of Calcium or of any of the alkaline earths accordingly as to which of these I may
employ as the material with which the tube last above referred to is filled.―The
phosphides so obtained are then introduced into a suitable still and converted by the
action of water into Hypophosphites and Phosphoretted Hydrogen Gas; the Phos-
phoretted Hydrogen gas given off being treated in the same manner as that above
described at the outset of the process followed by me in accordance with my
invention.
Having thus described the nature of my said invention and the manner of performing
the same,
I claim
First: The manufacture of Phosphide of Calcium from Phosphoretted Hydrogen
Gas in the manner and by the process herein set forth and described.
Secondly-The manufacture of the Hypophosphites herein referred to from the
Phosphide of Calcium obtained by the process substantially as herein set forth.
JAMES
STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.
Dated this Zist da ΟΙ
ruar
1000.
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.