Treatment of Waste Liquors from Galvanizing Works, or other Liquids Containing Chloride of Iron, or Chloride of Iron and Hydrochloric Acid, and for Extracting therefrom Oxide of Iron and Hydrochloric Acid.
Year: 1888

page_text: Date of Application, 8th Nov., 1888
Complete Specification Left, 19th July. 1889-Accepted. 24th Aug.. 1889
PROVISIONAL SPECIFICATION.
The Treatment of Waste Liquors from Galvanizing Works, or other
Liquids Containing Chloride of Iron, or Chloride of Iron and
Hydrochloric Acid, and for Extracting therefrom Oxide of Iron
and Hydrochloric Acid.
I, THOMAS TURNER Lecturer on Metallurgy, 217 Ladywood Road Birmingham,
do hereby declare the nature of this invention to be as follows:-
By the action of heat, air, and moisture, or of heat and either air or moisture, on
the liquors, with or without previous concentration, the liquid is decomposed into
oxide of iron and free hydrochloric acid. By varying the temperature and methods
of heating different shades of oxide of iron are produced. The oxide of iron
obtained is used for paint, or for other purposes. The hydrochloric acid is cou-
densed in suitable towers, and may if desired be used over again.
DL: L 1
1000
THOMAS TURNER.
COMPLETE SPECIFICATION.
The Treatment of Waste Liquors from Galvanizing Works, or other
Liquids Containing Chloride of Iron, or Chloride of Iron and
Hydrochloric Acid, and for Extracting therefrom Oxide of Iron
and Hydrochloric Acid.
I THOMAS TURNER of 217 Ladywood Road Birmingham in the County of Warwick
Lecturer on Metallurgy do hereby declare the nature of my said invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement:-
My invention has for its object the treatment of waste liquors from galvanizing
works or other liquids containing chloride of iron or chloride of iron and hydro-
chloric acid and for extracting therefrom oxide of iron and hydrochloric acid and
which liquors are usually thrown away into streams and sewers to the great pollution
thereof and from which I am enabled to obtain oxide of iron and hydrochloric acid
the former of which may be sold in various colours for paint and other purposes and
the latter may if desired be reused as pickle in the preparation of the various articles
to be galvanized in such galvanizing works.
I may in the first place to some extent by waste heat or otherwise concentrate the
waste liquor after which it is introduced into a vessel or furnace just as fast as it is
dehydrated.
This vessel or furnace is maintained at a temperature considerably above tho
boiling point of the liquor but not above a red heat. By this means evapourating pans
are not necessary.
During this process free hydrochloric acid distils off, while chloride of iron in a
moro or less basic condition remains. Air and steam are then introduced in the pro-
portions necessary to carry on a change which may be conveniently represented by

page_text: go on side by side in the same furnace or vessel. I use as little steain as possible in
fact just sufficient to prevent the formation of brown fumes. A connection is attached
to the furnace or vessel through which connection the hydrochloric acid may pass as
it is liberated to a suitable condensing and collecting apparatus.
I am thus enabled to recover the hydrochloric acid and oxide of iron without
either the use or addition of any chemical agent and without the use of evapourating
pans.
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 improvements in the treatment of waste, pickle from galvanizing works by
which the hydrochloric acid is recovered so as to be available for reuse or other
purposes while oxide of iron is at the same time produced substantially as and for the
purposes herein set forth.
Dated this 18th day of Ta... 1000
GEORGE
BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.