A New or Improved Acid Resisting Lining for Metallic Vessels.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
A New or Improved Acid Resisting Lining for Metallic Vessels.
We, RICHARD PRESTON of Bury Ground, Manufacturing Chemist, and
THOMAS THORNLEY, of Manchester Road, Paper Manufacturer, both of Bury
in the County of Lancaster, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an acid resisting lining for metallic vessels such as
wood-pulp digesters, which lining is capable also of resisting heat and moisture, and
may be employed alone or in combination with tiles and the like.
According to this invention, we prepare the lining material or composition from
a mixture, in the form of a paste or plastic mass, of commercial asbestos, litharge,
and a solution of silicate of soda or of silicate of potash or both of them, with or
without the addition of either or both an insoluble silicate such as slag or sand,
and a suitable sulphate such as the sulphate of lime or of barium.
This composition is ground or mixed into a paste or plastic mass which adheres
firmly to iron and other metallic surfaces, dries quickly, and, when dry, resists the
action of ordinary mineral acids and the effects of changes of temperature.
The composition may be employed alone as a lining, or for the purpose of
embedding bricks tiles and the like, or for pointing and making joints.
Dated this 7th day of November A.D. 1894.
WILLIAM E. HEYS,
Agent for the Applicants.
A New or Improved Acid Resisting Lining for Metallic Vessels.
We, RICHARD PRESTON of Bury Ground, Manufacturing Chemist, and
THOMAS THORNLEY, of Manchester Road, Paper Manufacturer, both of Bury
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 :-
This invention relates to an acid resisting lining for metallic vessels such as wood
pulp digesters, which lining is capable also of resisting the effects of heat and
moisture, and may be employed alone or in combination with lining tiles, bricks,
and the like.
According to this invention we prepare the lining material or composition from
a mixture, in the form of a paste or plastic mass, of commercial asbestos, litharge,
and a solution of silicate of soda or of silicate of potash or both of them, with or
without the addition of either or both an insoluble silicate such as slag or sand,
and a suitable insoluble sulphate such as the sulphate of lime or of barium.
The several ingredients may be used in various proportions and, as already
stated, the insoluble silicate such as sand, and the sulphate may be omitted. The

page_text: MOTION of Sificate of soda having a strength of 100 to 120 degrees I w. a
sufficient quantity.
The dry ingredients are ground or mixed together and then have added to them
a sufficiency of the silicate solution to form a paste or plastic mass, which when
applied to the walls of the vessel adheres firmly thereto, dries quickly, and, when
dry, resists the action of ordinary mineral acids and the effects of changes of
temperature. The mixture or composition is generally applied in two or more
coats in practically the same way as ordinary builder's plaster, and each coat may
be allowed to dry naturally or by the aid of artificial heat before the following
coat or coats is or are put on.
The composition may be employed alone as a lining or for the purpose of
embedding lining bricks or tiles and the like, and for pointing and making joints.
We have already in the Specification of Letters Patent granted to us No. 2743
dated the 8th day of February 1894 described a lining material for a similar
purpose, composed of asbestos tempered with a solution of a soluble silicate alone,
and we desire it to be understood therefore that we do not herein make any claim
to any such lining in which litharge is not an essential ingredient.
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. An acid resisting lining for metallic vessels, cousisting of a mixture of asbestos
and litharge made into a paste or plastic mass with a solution of a soluble silicate,
produced and applied substantially as herein before described.
2. An acid resisting lining for metallic vessels, consisting of a mixture of
asbestos, litharge, an insoluble silicate and a solution of a soluble silicate to which
there may or may not be added a suitable insoluble sulphate, produced and applied
substantially as hereinbefore described.
Dated this 26th day of June 1895.
WILLIAM E. HEYS,
Agents for the Applicants.