Improvements in the Manufacture of Articles adapted to Resist the Action of Acids or other Chemicals.
Year: 1899

page_text: Date of Application, 19th July, 1899
Complete Specification Left, 17th Apr., 1900 -Accepted, 19th May, 1900
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Articles adapted to Resist the
Action of Acids or other Chemicals.
I, EUGEN BORSARI, of Zollikon, near Zurich, Switzerland, Contractor for
Cement Work, do hereby declare the nature of this invention to be as follows:-
This invention relates to vessels capable of resisting the action of chemicals,
but particularly that of acids, and to the mode of making the same. A. vessel
according to this invention is made of asbestos combined with an acid-resisting
material, as ceresine, or paraffine, but preferably with Carnauba wax either by
painting or impregnating the asbestos board, forming the walls of the vessels,
with the acid-resisting material, or by pulverizing the asbestos and mixing it
with ceresine, paraffine, or Carnauba wax in such a manner that a substance
will be attained suitable for the formation of such a vessel.
Instead of making vessels entirely or directly of the materials herein before
mentioned, vessels made of some other suitable material may be lined with
asbestos boards prepared in the manner described; in this case the joints must
be filled with a paste composed of pulverized asbestos and acid-resisting material.
In order to make them capable of resisting acids etc., vessels can also be
covered, as to the surfaces to be made acid-resisting, with the said mixture of
asbestos and acid-resisting material combined with a suitable binding material.
Plates made of the said mixture for covering vessels can be formed by ordinary
press-action or by casting.
The Carnauba wax is preferred to paraffine and ceresine because it has a
relatively greater strength' or tenacity and becomes extremely durable at a
certain temperature-for instance the temperature of a cellar.
The asbestos board can be impregnated with the said materials either before
or after shaping it. In the former case, it is recommended that the surfaces
coming into contact with the contents, be once more painted or poured over with
the acid-resisting mixture in a warm state after shaping the vessels.
When plates are used to line vessels, the plates may be bedded in cement,
or fastened with suitable pins, as wooden ones.
The described plates or vessels made of asbestos may, for certain purposes,
as to increase the strength or durability, be provided with suitable insertions,
as wire fabric or cloth insertions.
This invention possesses great advantages in the construction of acid-resisting
vessels for chemical purposes, because according thereto the vessels are either
made in their entirety of asbestos in combination with acid-resisting material
by pressure or casting, or are constructed of any suitable material in the required
shape and are then lined, covered, or faced. The former way of carrying out
the invention would be particularly suitable for the construction of small vessels,
whilst for large vessels the latter method is recommended. The vessels can be
made of suitable material, as asbestos, and strengthened by iron insertions. A
vessel according to this invention can also be used as a lining for a stronger
vessel, which, being the outer portion of the whole vessel, will not require to

page_text: consist of or contain the acid-resisting material, but may consist of any suitable
material, as wood or xylonite, cement, cast iron, or cast bronze.
Plates of the kind herein before described may also be used for other industrial
purposes.
1009
Improvements in the Manufacture of Articles adapted to Resist the
Action of Acids or other Chemicals.
I, EUGEN BORSARI, of Zollikon, near Zurich, Switzerland, Contractor for
Cement Work, 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 vessels capable of resisting the action of chemicals,
but particularly that of acids, and to the mode of making the same. A vessel
according to this invention is made of asbestos combined with paraffine as an
acid-resisting material, either by painting or impregnating the asbestos board,
forming the walls of the vessel, with the paraffine, or by pulverizing the asbestos
and mixing it with paraffine (which serves also as a binding material) and then
casting or pressing the mixture in an ordinary way.
Instead of making vessels entirely of the materials herein before mentioned,
vessels made of some other suitable material may be lined with asbestos boards
prepared in the manner described; in this case the joints must be filled with a
paste composed of pulverized asbestos and the acid-resisting material.
In order to make them capable of resisting acids etc., vessels of suitable
material, as cement, can also be covered, as to the surfaces to be made acid-
resisting, with the said mixture of asbestos and the acid-resisting material,
which also acts as a binding material.
Plates made of the said mixture for covering vessels can be formed by ordinary
press-action or by casting.
The asbestos board can be impregnated with the paraffine either before or
after shaping it. In the former case, the surfaces liable to come into contact
with the contents must be coated with paraffine or the acid-resisting mixture
in a warm state after shaping the vessels because paraffine is very brittle and
breaks away from the surface.
When plates are used to line vessels, the plates may be bedded in cement,
or fastened with suitable pins, as wooden ones.
The described plates or vessels made of asbestos and paraffine may, for certain
purposes, as to increase their strength and durability, be provided with suitable
insertions, as wire fabric or cloth insertions.
The manufacture of acid-resisting vessels in their entirety of asbestos board
painted or impregnated with paraffin or of a mixture of powdered asbestos and
paraffine is considered to be particularly suitable for the construction of small
vessels whilst to make large vessels it is recommended to line receptacles as herein-
before described. The vessels can be made of suitable material, as asbestos, and
strengthened by iron insertions. A vessel according to this invention can also
be used as a lining for a stronger vessel, which, being the outer portion of the
whole vessel, will not require to contain the acid-resisting material, but may
consist of any suitable material, as wood or xylonite, cement, cast iron, or cast
bronze.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. The manufacture of vessels for liquids capable of resisting chemical action
but particularly the action of acids, in which asbestos and paraffine are com-
bined together in a suitable manner to form the walls of the vessels.
2. A vessel for liquids, capable of resisting chemical action, but particularly
that of acids, made of asbestos board painted or impregnated with paraffine.
3. A vessel for liquids, capable of resisting chemical action, but particularly
that of acids, made of a mixture of pulverized asbestos with paraffine.
4. The manufacture of vessels for liquids, capable of resisting chemical action,
but particularly that of acids, in which asbestos and paraffine are combined
together in a suitable manner to form plates, which serve to line a vessel of
cement, for instance, and the joints of the plates are filled with a paste mado
of pulverized asbestos and paraffine.
5. Plates of asbestos board painted or impregnated with paraffine, or of a
mixture of pulverized asbestos and paraffine, (whether strengthened or not with
wire fabric or cloth insertions) for lining vessels for liquids, capable of resisting
chemical action, but particularly that of acids.
6. The manufacture of vessels for liquids, capable of resisting chemical action,
but particularly that of acids, in which asbestos and paraffine are combined
together in a suitable manner to form the walls of the vessels, and the asbestos,
in board form or pulverized, receives an insertion of wire fabric to increase its
strength and durability.
Dated this 17th day of April 1900.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.