IMPROVEMENTS IN THE PURIFICATION OF COAL GAS
Year: 1882

page_text: LETTERS PATENT to Charles Estcourt Analyst to the City of Manchester of
Manchester in the County of Lancaster for an Invention of "IMPROVEMENTS
IN THE PURIFICATION OF COAL GAS"
PROVISIONAL SPECIFICATION left by the said Charles Estcourt at the
Office of the Commissioners of Patents on the 2nd November 1882.
CHARLES ESTCOURT, Analyst to the City of Manchester of Manchester in the
County of Lancaster "IMPROVEMENTS IN THE PURIFICATION OF Coal Gas”
The object of this invention is the purification of Coal Gas from Sulpher
compounds such as HS which are decomposed when brought into contact with
g
SO gas. As is well known when SO comes in contact with HS Sulpher is
B
2
deposited and a certain quantity of Penta and Tetrathionic Acids is formed. If
however the gases are passed through solutions containing certain salts, almost the
whole of the Su'pher of both gases is precipitated
What I claim therefore is the purification of Coal Gas by passing it either
with SO as a gas produced by any of the ordinary methods through a solution of
2
any of the following compounds or mixtures thereof namely Na Cl; K Cl; H CI
Ba Cl; Ca Cl; Mg Cl; NHCI; NH; HCO; (NH)CO; (NH) SO C₂SO;
3
2
$
$
3
42 g
NaSO; K SO; MgSO; NaCO; KCO or salts which contain SO-the SO
g
$
8
a
°
may be used in solution if desired or the mixed gases may be passed by appropriate
means into or through solutions of the needful compounds.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Estcourt in the Great Seal Patent Office on the
2nd May 1883.
CHARLES ESTCOURT, Analyst to the City of Manchester of Manchester in the
County of Lancaster "IMPROVEMENTS IN THE PURIFICATION OF COAL GAS"
The object of this invention is the purification of Coal Gas from Sulphur
compounds such as Sulphuretted Hydrogen (HS) which are decomposed when
brought into contact with (SO) Sulphurous Acid gas.
2
As is well known when SO comes in contact with HS Sulphur is deposited and
t
a certain quantity of Penta and Tetrathionic Acids is formed. If however the
gases are passed through solutions containing certain salts almost the whole of the
Sulphur of both gases-is precipitated..
When it is desired to recover as much Sulphur as possible the most economical
method is to make a solution (more or less saturate) of Magnesium or Calcium-
Chloride then mix this with strong Sulphurous Acid solution or pass Sulphurous
Gas into it. The whole mixture is then used in an appropriate vessel through
which the Gas is made to pass.
What Lclaim.is: The purification of Coal Gas by passing it either with SO
(as a gas produced by any of the ordinary methods) through a solution of any of
the following compounds or mixtures thereof namely Na Cl; K CI; H Cl; Ba Cl;
Ca Cl; Mg Cl; NH Cl; (NH; HCO); (NH) CO; (NH)SO; Ca SO; Na
SO; KSO: Mg SO; Na CO; K CO and salts which contain SO or through
$
$
2 4
$
4
.
2 $
8
•
2 a
2
.
.
2
the SO in watery solution or solution of any of the above named salts or mixtures
$
thereof or the mixed gases passed into or through solutions of the needful
compounds.
Ca Cl; Mg Cl; NH Cl; (NH; HCO); (NH) CO; (NH) SO; Ca SO; Na
$
2
4
(NH)SO;
.
SO; KSO: Mg SO; Na CO; K CO and salts which contain SO or through
4
2 .
•
$
the SO in watery solution or solution of any of the above named salts or mixtures
thereof or the mixed gases passed into or through solutions of the needful
compounds.
In witness whereof 1 have hereunto amxed my hand and seal this 30 day of
April in the year of our Lord 1883.
CHARLES ESTCOURT
(LS)