Year: 1885

page_text: I WILLIAM FREDERICK RICHARDS of Glyncollen Swansea Valley in the County
of Glamorgan Gentleman do hereby declare the nature of this Invention to be as
follows:-
1
This Invention relates to the production of metallic zinc from those products
which are obtained and result from and during the galvanization of iron which
galvanization is effected by immersing the iron in a bath of molten zinc to which a
salt of ammonia such for example as muriate of ammonia has been added and which
products dross or scum consist essentially of chloride of zinc and chloride of
ammonium and it consists in submitting the soluble portion of the product or
products before mentioned to galvanic action that is to say to precipitate the zinc
contained in the solution in a metallic condition upon a pole of a battery or when
such pole is placed in connection with a dynamo or other electric current producer.
The metallic zine thus obtained is collected and melted and may be used for
purposes useful in the arts and manufactures-Further the ammonia or ammoniacal
salt may after the extraction of the zinc be collected in any well known manner.
Dated thin rath
1007
"

page_text: Resulting from the Galvanization of Iron, and the Recovery
of Ammonia or Ammoniacal Compounds from the said
Products.
I WILLIAM FREDERICK RICHARDS of Glyncollen Swansea Valley in the County
of Glamorgan Gentleman, 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 production of metallic zinc from the products dross
or scum obtained or resulting from and during the galvanization of iron which
galvanization is effected by immersing the iron in a bath of molten zinc to which a
salt of ammonia such for example as muriate of ammonia has been added which
products dross or scum consist essentially of chloride of zino and chloride of
ammonium and my Invention consists in submitting these soluble products
consisting of the double salts of chloride of zinc and chloride of ammonium to
galvanic or electrical action so as to precipitate or collect in a metallic condition
the zinc contained in the solution upon a pole of a battery or of a dynamo or other
electric current producer. The following is the manner in which this may be
carried into effect I take the products dross or scum containing the double salts
of chloride of zinc and chloride of ammonium as aforesaid and I dissolve them by
means of hot water or steam as far as possible I then add a small quantity of
hydrochloric acid to ensure the dissolving of all the zinc I then boil the solution
until the solution is preferably of a density of twenty five on Baume's hydrometer
I then run the solution consisting of the aforesaid double salts into convenient
tanks in which are the poles of a dynamo or other generator of electricity and
I pass the current of electricity through the same whereby the metallic zinc is
collected on or at a pole and may be removed therefrom and melted and used for
purposes in the arts and manufactures where a pure metallic zinc is required-The
ammonia or ammoniacal salt remaining after the extraction of the zine may be
collected or obtained in any known manner of obtaining such ammonia or
ammoniacal salt from solutions containing them.
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 treatment of the double salts of chloride of zino and chloride of ammonium
obtained from ammoniacal bye products dross or scum (resulting from the galvani-
zation of iron) by means of electricity or galvanic action so as to obtain Firstly
metallic zinc and afterwards ammonia or ammoniacal salt substantially as
described.