Process for Raising the Point of Fusion or Preventing the Liquefaction of Resins, Wax and Wax-like Substances, Pitch, and Tar.
Year: 1899

page_text: Date of Application, 6th Mar., 1899-Accepted, 8th Apr., 1899
Process for Raising the Point of Fusion or Preventing the Liquefaction
of Resins, Wax and Wax-like Substances, Pitch, and Tar.
I, ADOLF GENTZSCH, of VII. Stiftgasse No. 1, Vienna, Austria, Mineralogist,
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 has for its object to prevent resins, wax and the like, pitch and
tar (which each have their own particular melting point) from melting or liquefy-
ing at the temperature at which they ordinarily melt or assume a mobile liquid
condition, or even at a higher temperature.
This is of considerable importance in various industrial applications of these
materials, and in particular in cases where they are to be mixed with other sub-
stances having a considerably higher melting point.
By my present invention I am enabled so to alter the properties of each of the
above mentioned substances that they will never assume the mobile liquid con-
dition, that is to say, when heated to a high temperature they will still remain in
a toughly viscous state so that they can hardly be stirred about.
For the purposes of my invention each of the said substances is heated in a suit-
able receptacle to a temperature of from 100° to 200° C., so that it assumes a
mobile liquid form. Water is then allowed to fall from a suitable height drop
by drop into the hot mass, which is stirred up from time to time. The faster the
water is allowed to drop, the more rapidly will the operation be completed, but
care has to be taken that, on the one hand, the temperature of the mass does not
decrease and, on the other hand, that the drops do not unite to form a stream.
The duration of the operation can be still farther shortened if there be added
to the water an excess of those substances that are generally contained in water,
as determined by analysis, such as the carbonates of lime and magnesia, magnesium
hydroxide, sulphate of lime, and oxide of iron.
It is of advantage to provide the water tank from which the water is supplied
with a suitable stirring apparatus by which the solution of the said substances is
maintained at the point of saturation.
The drops of water falling on to the hot mass are at once converted into steam
and cause the liquid mass to become more and more viscous. When the required
degree of viscosity has been attained the supply of water is stopped and the mass
is heated for some time longer to insure the removal of all aqueous particles.
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Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is:
Process, for raising the melting point of resins, wax and wax-like substances,
pitch and tar. or for preventing these from assuming the mobile liquid condition,
which, consists in causing water, either alone or with an addition of substances
such as the carbonates of lime and magnesia, magnesium hydroxide, sulphate of

page_text: lime or oxide of iron, to fall drop by drop on to the said substances while heated
to above 100° C. until the mass has assumed a viscous condition, substantially
as described.
ABEL & IMRAY,
Agents for the Applicant.