Improvements in the Manufacture of Cyanogen Compounds from Sulpho-cyanides.
Year: 1889

page_text: Date of Application, 11th Feb.,
1889
Complete Specification Left, 9th Nov., 1889-Accepted, 14th Dec., 1889
PROVISIONAL SPDULERGATION.
Improvements in the Manufacture of Cyanogen Compounds from
Sulpho-cyanides.
We, THOMAS PARKER of the firm of Elwell-Parker Limited, Electrical Engineer,
and ALFRED EDWARD ROBINSON, Technical Chemist, both of Commercial Road
Wolverhampton in the County of Stafford, do hereby declare the nature of this
invention to be as follows:-
This Invention relates to the manufacture or production of cyanogen compounds
from sulpho-cyanides, and these Improvements consist in the production of com-
mercial hydro-cyanic acid by the electrolysis of a sulpho-cyanide and in the ntilisation
of the hydrocyanic acid so produced, in the manufacture of cyanides of the alkalies
and of the alkaline earths.
In the electrolysis, a neutral solution of a sulpho-cyanide may be employed, but in
this case a current of comparatively high density will be required. We prefer there-
fore to use a solution containing free sulpho-cyanic acid as by this means a current
having a much lower density may be employed. The products of the electrolysis aro
hydrocyanic acid and sulphuric acid. The hydrocyanic acid is condensed in water
to form hydrocyanic acid of commerce, or it may be condensed in a solution of an
alkali or of an alkaline earth to form a evanide.
In order to prepare the solution for electrolysis, we may proceed in the following
manner-We take ordinary gas liquor or other solution containing the sulpho-
cyanides in solution and precipitate the sulpho-cyanides by means of sulphate of
copper and a suitable reducing agent. Sulphuretted hydrogen or carbon dioxide is
then added to the solution and combines with the copper, setting free the sulpho-
cyanic acid. The solution containing the free sulphocyanic acid is then filtered or
otherwise separated from the sulphide or carbonate of copper and any other insoluble
matters.
We do not limit ourselves to the precise means hereinbefore described for the
separation of the sulphocyanic acid as this may be obtained by electrolysis or by
electro-chemical means
The residual copper salt may be used in a second operation.
1000
WILLIAM E. HEYS,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Cyanogen Compounds from
Sulpho-cyanides.
We, THOMAS PARKER of the Electric Construction Corporation Limited, Electrical
Engineer and ALFRED EDWARD ROBINSON Technical Chemist, both of Commercial
Road Wolverhampton in the County of Stafford, 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 relates to the manufacture or production of cyanogen compounds
from sulpho-cyanides, and these Improvements consist in the production of com-
mercial hydrocyanic acid by the electrolysis of a sulpho-cyanide, and in the utilization
of the hydrocyanic acid so produced in the manufacture of cyanides of the alkalies
and of the alkaline earths.

page_text: In the electrolysis a neutral solution of a sulpho-evanido may be employed, but in
this case a current of electricity having a comparatively high density will be
required. We prefer therefore to use a solution containing free sulpho-eyanic acid as
hy this means a current having a much lower density that is to say from 10 to 20
amperes per square foot may be employed. The products of the electrolysis are
hydrocyanic acid and sulphuric acid. The hydrocyanic acid is condensed in water
to form the hydrocyanic acid of commerce, or it may be condensed in a solution of
an alkali or of an alkaline earth to form a cyanide.
In order to prepare the solution for electrolysis we prefer to proceed in the
following manner-We take ordinary gas liquor or the spent liquor" after the
ammonia has been distilled therefrom or other suitable solution containing sulpho-
cyanides, and precipitate the sulpho-cyanides contained therein by means of sulphate
of copper and a suitable reducing agent such as sulphate of iron or sulphurous acid.
The precipitate may then be separated by filtration and be washed if necessary for
the removal of soluble impurities, or when the precipitate or solution do not contain
other matters the presence of which might be objectionable, the precipitate may be
separated by decantation or by a filter press or other suitable means. We prefer to
treat the precipitate which consist of cuprous sulphiocyanide, in the moist state with
carbonic anhydride or with sulphuretted hydrogen under pressure so as to obtain
carbonate or sulphide of copper and sulphoryanic acid. The combined copper salt
and sulphocyanic acid, produced in the moist state as hereinbefore described or other-
wise produced, is brought into solution from which the insoluble copper salts may
be removed by decantation or filtration. The filtrate which contains the sulphocyani
acid is then subjected to electrolysis for the separation of the hydrocyanic acid which
may simply be condensed in water to form the hydrocyanic acid of commerce or in
a solution of an alkali or of an alkaline earth to form a cyanide as hereinbefore
doscribel.
We do not limit ourselves to the precise means hereinbefore described for the
separation of the sulpho-cyanic acid in solution as this may be effected by electrolysis
or by electro-chemical means, nor do we limit ourselves to the electrolysis of a solution
containing free sulphocyanic acid.
The residual copper salt may be used in a second operation.
Having now particularly described and ascertaineil the nature of my said Inven-
tion and in what manner the same is to be performed, we, declare that what
wo claim is
(1) The manufacture or production of hydrocyanic acid from solutions of sulpho-
cyanides substantially in the manner and by the means hereinbefore described.
(2) The manufacture of cyanides of the alkalies or of the alkaline earths sub-
stantially in the manner and by the means hereinhefore described.
mt/A IDE ALL Y
November A.12. 1000.
Um/1IDE ALL MY UB
WILLIAM E. HEYS,
Agent for the Applicants.
WILLIAM E. HEYS,
Agent for the Applicants.

page_text: A New and Improved Order and Measuring Book.
I, ARTHUR WESLEY WILKINSON, of the firm of Messrs. A. W. Wilkinson & Co., of
Chorley Lane, Leeds, in the county of York, Wholesale Clothiers, 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 :—
The object of my invention is to produce a simple and effective measuring order
book, so that when writing down the measurements and order it is also copied on to the
counterfoil pages of the book which have corresponding leaf numbers, the counter-
foil can then be torn out of the book and forwarded to the firm as a correct copy of
order and measures.
My new and improved order and measuring book consists of a number of paper
printed forms containing lines for names and addresses of customers with ruled
spaces for entering down measurements for the various garments required and
instructions.
Between each of the aforesaid leaves are similar counterfoils, so that the traveller
on taking orders, when writing upon the paper forms such order is reproduced by
placing sheets of transfer or blacklead paper between the sheets in the ordinary way
at the same time upon the counterfoils, which are perforated so that they can be
readily torn out of the book and posted to the firm represented.
The aforesaid leaves and counterfoils being numbered to correspond, are bound up
in book form of suitable dimensions.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what I
claim is :-
The construction of tailors or clothiers order books, consisting of paper leaves
interspaced with counterfoils, perforated, numbered and bound up in book form as and
for the purposes described.
Dated this 8th day of February 1889.
JOHN E. WALSH,
Royal Exchange Chambers,
Boar Lane, Leeds,
Agent for the Applicant.