Year: 1897

page_text: Date of Application, 24th June, 1897
Complete Specification Left, 22nd Feb., 1898--Accepted, 16th Apr., 1898-
A communication by MAX ROSENBAUM, of the Buckau Chemical Works, Stassfurt,
in the Empire of Germany, Chemical Works Manager.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester,
both in the County of Lancaster, 118, New Street, Birmingham, in the County
of Warwick and 322, High Holborn, in the County of Middlesex, Civil Engineer,
do hereby declare the nature of this invention to be as follows:-
-
This invention has for its object a means for making porous substances, and
consists in mixing cement or other like plastic material with substances capable
of being sublimated or distilled and stirring it with water to a liquid mass.
After setting, the whole mass forms a body thoroughly mixed with the volatile
substance employed, from which the latter is wholly or partially expelled by
suitable operations which effect a separation of volatile from non-volatile sub-
stances. Various organic and in-organic sublimable and distillable compounds
capable of being sublimated or distilled may be employed as the added substances.
Naphthaline has been found to be a very suitable substance for use for this object.
The amount to be added depends of course on the degree of porosity which it is
desired to obtain, for instance 250 parts of naphthaline may be used to 1000 parts
of cement, the former being added in finest dust or granular condition accord-
ing to the size of pore desired:
The pasty mass formed by the admixture of water or other suitable liquid
is run into moulds and after setting or hardening is freed from the naphthaline
and recovered as
by simply heating it. The naphthaline is then expelled
far as possible in any suitable manner and may be used again for the next
operation. The substances or bodies thus produced are of a very fine and even
porosity, and the plastic material employed has as such undergone no chemical
change by this treatment, and consequently its adhesiveness has not been materially
weakened so that the products thus formed afford' a material of great strength.
Dated this 23rd day of June 1897.

page_text: A communication by MAX ROSENDAUM, of the Buckau Chemical Works, Stassfurt,
in the Empire of Germany, Chemical Works Manager.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester,
both in the County of Lancaster, 118, New Street, Birmingham, in the County
of Warwick and 322, High Holborn, in the County of Middlesex, Civil Engineer,
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:-
1
This invention has for its object a means for making porous substances, and
consists in mixing cement or other like "plastic material with substances capable
of being sublimated or distilled and stirring it with water to a liquid mass.
During or after setting, the whole mass forms a body, thoroughly mixed with the
volatile substance employed, from which the latter is wholly or partially expelled by
suitable operations which effect a separation of volatile from non-volatile sub-
stances. Various organic and in-organic sublimable and distillable compounds
capable of being sublimated or distilled may be employed as the added substances.
Naphthaline has been found to be a very suitable substance for use for this object
The amount to be added depends of course on the degree of porosity which it is
deaired to obtain, for instance 250 parts of naphthaline may be used to 1000 parts
of cement, the former being added in finest dust or granular condition accord-
ing to the size of pore desired.
The pasty mass formed, by the admixture of water or other suitable liquid
is run into moulds and during or after setting or hardening is freed from the naph-
thaline by simply heating it. The naphthaline-is then expelled and recovered as
far as possible in any suitable manner and may be used again for the next
operation: The substances or bodies thus produced are of a very fine and even 2
porosity, and the plastic material employed has as such undergone no chemical
change by this treatment, and consequently its adhesiveness has not been materially
weakened so that the products thus formed afford a material of great strength.
It may also be mentioned that the process for making the porous cement sub-
stance herein before described is not limited to the use of naphthaline but for 3
instance carbonate of ammonia, sulphur and other like substances capable of
being expelled from the cement body by sublimation, distillation, or the like.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent,, I declare that what I claim is:-
Bodies formed of cement which are made evenly porous by the cement before
being, moulded being mixed with such substances as may be again expelled
by evaporation, during, or after the setting by means of sublimation, distillation
or the like, thus producing an even porosity, substantially as herein before set
forth.
Doted thin 01
A
Th1
1000
3
4