Improvements in the Preparation of Compositions Adapted for Use in the Treatment of Sewage and Foul Waters.
Year: 1893

page_text: Date of Application, 30th Dec., 1893
Complete Specification Left, 29th Sept., 1894-Accepted, 3rd Nov., 1894
い
TORUNA DINITIVATION.
Improvements in the Preparation of Compositions Adapted for Use
in the Treatment of Sewage and Foul Waters.
We HARRY BLOOM SHARP, Chemist and JAMES BURY PETRIE, Chemical
Engineer, both of The Kremmolite Company of Broadfield Works, Smithy Bridge,
in the County of Lancaster, do hereby declare the nature of this invention to be as
follows:-
Our invention relates to compositions or compounds designed to be used in the
treatment of sewage and foul waters and particularly to the preparations containing
sulphates of aluminium and iron.
We treat material containing oxides of aluminium and iron with sulphuric acid
in company with commercial salt (sodium chloride) whereby disregarding foreign
matters we obtain a compound of aluminium sulphate, iron sulphate, and sodium
sulphate which is very suitable for its proposed uses.
The material! which we find to be the most suitable for our purpose is a poor
iron ore consisting principally of aluminium oxide and containing also iron oxide.
We disintegrate grind or reduce the material to a very fine powder and feed it into
water contained in a pot pan or boiling vessel so as to obtain a thorough mixture of
the powder with the water. To the mixture we add commercial salt and sulphuric
acid and we boil the mixture with occasional or constant agitation or stirring until
the mixture has become concentrated to such a degree as that on cooling it will
set into blocks or masses. At this stage we run off the contents of the pot or
boiler into a receptacle or preferably into moulds in which the compound is
allowed to rest until it has set when the blocks are turned out of the moulds.
The moulds may be of such size as that the blocks will be of convenient sizes
for transport or may be of such proportions and formation as that the large masses
can be readily separated into blocks of convenient sizes.
Other salts or matters likely to add to the beneficial action of the composition
might be added before running into the moulds. In place of the salt hydrochloric
acid might be used but not with equal advantage as we consider the presence of
the sodium sulphate to be an advantage and the cost of the preparation would not
be reduced by the substitution.
Dated this 50th day of Dovember 1802
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.
Improvements in the Preparation of Compositions Adapted for Use
in the Treatment of Sewage and Foul Waters.
We HARRY BLOOM SHARP, Chemist and JAMES BURY PETRIE, Chemical
Engineer, both of The Kremmolite Company of Broadfield Works, Smithy Bridge,
in the County of Lancaster, 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, that is to say :-
Our invention relates to compositions or compounds designed to be used in the
treatment of sewage and foul waters and particularly to preparations containing
sulphates of aluminium and iron.

page_text: We treat material containing oxides of aluminium and iron with sulphuric acid in
company with hydrochloric acid whereby (disregarding foreign matters) we obtain
a compound of aluminium sulphate and iron sulphate which is very suitable for its
proposed uses.
The material which we find to be the most suitable for our purpose is a poor
iron ore consisting principally of aluminium oxide and containing also iron oxide.
We disintegrate, grind or reduce the material to a very fine powder and feed it
into water contained in a pot, pan or boiling vessel so as to obtain a thorough
mixture of the powder with the water. To the mixture we add hydrochloric acid
and sulphuric acid and we boil the mixture with occasional or constant agitation
or stirring until the mixture has become concentrated to such a degree as that on
cooling it will set into blocks or masses. At this stage we run off the contents of
the pot or boiler into a receptacle or preferably into moulds in which the
compound is allowed to rest until it has set, when the blocks are turned out of the
moulds.
The moulds may be of such size as that the blocks will be of convenient sizes
for transport or may be of such proportions and formation as that the large masses
can be readily separated into blocks of convenient sizes.
We are aware that it has been proposed to obtain a product suitable for use in
the treatment of sewage, by combining materials containing oxides of aluminium
and iron with sodium chloride, and the product so obtained is highly successful
for its purpose.
But under certain circumstances, for example in or near to
chemical works where hydrochloric acid is ready to hand and compares favourably
as regards cost with sodium, the said hydrochloric acid may be used as an economical
substitute for sodium chloride the product being of equal or nearly equal efficacy
for its purpose, while under the stated circumstances the cost of production is
considerably less.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is.
1. The improved composition or product for treating sewage or impure waters,
obtained by heating material such as pulverised iron ore, containing aluminium
oxide and iron oxide, in water, adding to the mixture hydrochloric acid and
sulphuric acid, boiling the same till sufficiently concentrated and pouring off into
moulds wherein the mixture sets into solid blocks substantially as bereinbefore
described.
2. The employment of hydrochloric acid in the treatment of materials containing
oxides of aluminium and iron with sulphuric acid for the purpose of obtaining
a product capable of being used in the purification of sewage and foul water
substantially as described.
Dated this 28th day of September 1894
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.