Improvements in and in the Production of Compositions adapted to be Used in the Treatment of Sewage and other Foul Waters.
Year: 1895

page_text: Date of Application, 1st June, 1895
Complete Specification Left, 29th Feb., 1896-Accepted, 4th Apr., 1896 ....
Improvements in and in the Production of Compositions adapted to
be Used in the Treatment of Sewage and other Foul Waters.
**
I CHARLES ANTHONY BURGHARDT of 35 Fountain Street Manchester in the
County of Lancaster Analytical Chemist do hereby declare the nature of this
invention to be as follows:-
My invention relates principally to the treatment of sewage and has for its object
to produce compositions which can be used in such treatment. In the carrying into
effect of a former invention for which I obtained Letters Patent Number 14,801 of
the year 1893 I produced a cake or composition containing ferric sulphate ferric
chloride aluminium sulphate and sodium sulphate the two last mentioned salts
protecting the ferric sulphate and ferric chloride from the action of the atmosphere
so that deliquescence was prevented or greatly retarded which enabled the
preparation to be stored or transported without inconvenience. According to my
present invention I produce a preparation containing ferric sulphate and aluminium
sulphate the last mentioned salt being the binding material and materially preventing.
the deliquescence of the compound. I obtain the combination either by reaction
during the preparation or by mixing the salts .but in either case the after treatment.
is the same or similar to what is set forth in the Specification of my said former
invention. In the one case I take a hydrated ferric oxide which may be either
a natural mineral (iron-ore consisting mostly of ferric hydrate) or any other
substance largely consisting of hydrated ferric oxide soluble directly in strong.
sulphuric acid or sulphuric acid containing about fifty per cent. of water.
hydrated ferric oxide substance is finely ground and well mixed with a suitable
quantity of strong sulphuric acid a certain quantity of water added and boiled until
all the hydrated ferric oxide is in solution. I now add a certain proportion of
finely ground bauxite" or burnt shale or a suitable material containing alumina
and mix the whole thoroughly. I also can in some cases mix together the proper
proportions of hydrated ferric oxide substance and alumina furnishing material in
a finely ground condition and add the requisite amount of strong, sulphuric acid
and water and boil the mixture until all the materials are dissolved except impurities
such as silica lime etcetera. The solution in any case is concentrated until it attains
such a strength that it will set into a cake. In the case where I produce the
compound by mixing the salts together I either produce the ferric sulphate.by.
the above mentioned method or obtain it by some other means dissolve it in water.
and dissolve in it commercial sulphate of aluminium sufficient to cause the final
solution on concentration to set into solid masses or cakes.
Dated this Thirty first day of May 1905
The

page_text: Improvements in and in the Production of Compositions adapted to
be Used in the Treatment of Sewage and other Foul Waters.
I CHARLES ANTHONY BURGHARDT of 35 Fountain Street Manchester, in the
County of Lancaster Analytical Chemist 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 :-
My invention relates principally to the treatment of sewage and has for its object.
to produce compositions which can be used in such treatment. In the carrying into
effect of a former invention for which I obtained Letters Patent Number 14,801 of
the year 1893 I produced a cake or composition containing ferric sulphate ferric
chloride aluminiuin sulphate and sodium sulphate, the two last mentioned salts:
protecting the ferric sulphate and ferric chloride from the action of the atmosphere
so that deliquescence was prevented or greatly retarded which enabled the
preparation to be stored or transported without inconvenience. According to my
present invention I produce a preparation containing ferric sulphate and aluminium
sulphate, the last mentioned salt being the binding material and materially preventing
the deliquescence of the compound. I obtain the combination either by reaction
during the preparation, or by mixing the salts, but in either case the after treatment
is the same or similar to what is set forth in the Specification of my said former
invention. In the one
case I take a hydrated ferric oxide which may be either
a natural mineral (iron-ore consisting mostly of ferric hydrate) or any other.
substance largely consisting of hydrated ferric oxide soluble directly in strong
The
sulphuric acid, or sulphuric acid containing about fifty per cent. of water.
hydrated ferric oxide substance is finely ground and "well mixed with a suitable
quantity of strong sulphuric acid, a certain quantity of water added and boiled until
all the hydrated ferric oxide is in solution. I now add a certain proportion of
finely ground bauxite or burnt shale, or a suitable material containing alumina
and mix the whole thoroughly. I also can in some cases mix together the proper
proportions of hydrated ferric oxide substance and alumina furnishing material in
a finely ground condition and add the requisite amount of strong sulphuric acid
and water, and boil the mixture until all the materials are dissolved except impurities
such as silica, lime, &c. The solution in any case is concentrated until it attains
such a strength that it will set into a cake. In the case where I produce the
compound by mixing the salts together I either produce the ferric sulphate by
the above-mentioned method, or obtain it by some other means, dissolve it in water.
and dissolve in it commercial sulphate of aluminium sufficient to cause the final
solution on concentration to set into solid masses or cakes.
In producing the cake from the mixed ores, a careful quantitative analysis is
made of the same and the proportions so arranged as to eventually furnish a cake
containing the required percentages of ferric oxide and alumina. As an example
a mixture of hydrated ores is made which contains 57.6 per cent. of ferric oxide
and 13.8 per cent. of alumina. Of this mixture 25 parts are taken very finely
ground up and 39 parts of full strength commercial sulphuric acid and 60 parts
of water added to the same, the mass well stirred by suitable mechanical means
and kept at a gentle boil. Water is afterwards added to bring the whole up to
the original bulk before the boiling was commenced. The boiling is then gently
continued until the surface of the mass has a glassy appearance and a sample taken
out sets semi-hard on cooling. The mixture can now be run out into suitable
moulds and allowed to cool & set. In the case where I produce the compound
by mixing the salts the respective amounts of ferric sulphate and commercial
aluminium sulphate are adjusted by previously analysing the ferric hydrate
furnishing ore and taking sufficient of it to produce the amount of ferric sulphate

page_text: required in the final compound. The requisite amount of commercial aluminium
sulphate is dissolved in water and added to the above mentioned ferric sulphate-
solution and the mixture then concentrated by evaporation until it will set into
a solid mass on cooling.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is
1. The production of a composition adapted to be used in the treatment of
sewage and other foul waters by making a mixture of ferric hydrate furnishing
material and alumina furnishing material, treating it directly with strong
commercial sulphuric acid, boiling or heating it until the material is completely
decomposed (with the exception of silica, lime or other substance insoluble in
sulphuric acid) and sets on cooling into a cake or mass in the manner set forth.
and specified.
2. The production of a compound adapted to be used in the treatment of sewage.
and other foul waters by dissolving ferric sulphate (produced by the above mentioned.
means) in water and adding this solution to a solution of commercial aluminium
sulphate of the requisite strength, mixing the two solutions and concentrating the
mixture by evaporation until it sets into a mass.
Dated this Twenty-eighth day of February 1896.
CHARLES ANTHONY BURGHARDT.