A New or Improved Process for Producing Hard Potash and similar Soap from Solid or Liquid Fats.
Year: 1889

page_text: Date of Application, 13th July, 1889
Complete Specification Left, 6th May, 1890-Accepted, 12th July, 1890
PROVISIONAL
SPECIFICATION.
A New or Improved Process for Producing Hard Potash and similar
Soap from Solid or Liquid Fats.
I, HEINRICH EURICH, Doctor of Philosophy, of Feuerbachstrasse No. 9 Frankfort /m.
in the Empire of Germany, Chemist, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in the manufacture of soap and essentially
consists in producing hard potash-soap containing any suitable quantity of hydrate of
potash or carbonate of potassium by heating any solid or liquid fat, capable of
saponification, to a temperature of at least 100°, but preferably 110 to 130° Centigrade,
mixing the same with a concentrated solution of caustic potash or carbonate of
potassium of not less than 36° Beaumé and thoroughly stirring this mixture, hard
soap resulting in about 30 minutes after the cooling of the latter.
Caustic potash or carbonate of potassium, instead of in solution of high percentage,
may also be employed in a solid state, must however, in the latter case, be very
gradually introduced, as otherwise these kali-compounds produce not only a saponi-
fying, but also a decomposing effect on the fat. Their decomposing action on the
fat may however also be obviated by adding simultaneously with the solid compounds,
the same quantity of water.
The above process, equally as to potash soap, applies also to soda soap and potash
soda soap by substituting for the hydrate of potash or carbonate of potassium the
corresponding soda compounds,-hydrate of soda or sodium-or a mixture of soda-
and sodium-compounds.
The solid soda soap produced can, like all other soaps, also be mixed with the usual
substitutes, for instance soluble glass and such like.
COMPLETE SPECIFICATION.
A New or Improved Process for Producing Hard Potash and similar
Soap from Solid or Liquid Fats.
I, HEINRICH EURICH, Doctor of Philosophy, of Feuerbach Strasse No. 9 Frankfort /m.
in the Empire of Germany, 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 :-
The object of this invention is a process for producing from solid or liquid fats hard
potash and similar soap, containing any suitable quantity of hydrate of potash or
carbonate of potassium.
To accomplish the said purpose I raise any solid or melted animal or vegetable fat
or resin or a mixture of these substances to a temperature of above 100 degrees, but
by preference 110 to 130 degrees Centigrade, at the same time gradually adding
50 kilogrammes of a concentrated solution of caustic potash or carbonate of potassiumi
of no less than 30° Beaumé to every 100 kilogrammes of the above substances,
while stirring the mixture. Preferably first a quarter of the said lye, and then
gradually the rest thereof is poured in, no stirring being required in this case.
Subsequently complete saponification ensues within 1 to 14 hours and according to
the contents, in the fat, of solid, not volatile, sebacic acid, 150 to 155 kilogramines
of soap is obtained from 50 kilogrammes of lye having a specific weight of 142, i.e.
a lye of 42° Beaumé and 100 to 105 Kilogrammes of fat.
Provided the evaporation

page_text: amounts to about 1 to 1 per cent., there will still be a yield of soap of from
148 to 153 kilogrammes.
With the improved process, the whole of the fat and the whole of the lye undergoes
saponification; consequently no elimination of secondary lye or glycerine takes
place.
A chemical analysis of the solid and transparent soap obtained by the improved
process demonstrated the following composition :-
Sebacic acid
Glycerine
Kali
Water
70.5 per cent.
6-9 "
.12.9 27
"
32
9.7 "1
23
The composition will of course greatly depend on the quality of the fats employed.
The improved process applies also, the manufacture of soda soap and potash soda
soap, the hydrate of potash or carbonate of potassium being in these cases replaced
respectively by the corresponding soda compounds-hydrate of soda or sodiuin-or
by a mixture of such compounds.
The soaps produced by the improved process can, like all other soaps, be mixed
with substituies as are usually employed, for instance soluble glass or similar substances.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :
A process for producing hard potash soap, soda soap, or potash-soda soap consisting
in adding to the fatty or oleaginous material a strong solution of caustic potash or of
the corresponding soda compounds or of a mixture of such compounds respectively,
while raising the whole to a high temperature, substantially as described.
Dated this 6th day of May 1890.
ཪསལ་ 1030
HEINRICH BURICH.
Per Huelser & Co.,
142, Fleet Street, London, E.C., Attorneys,