for washing linen and sorts of tissues
Year: 1897

page_text: I, LUDWIG GROTE, Manager of Works, of 84B East India Dock Road, Poplar, in the
County of London, do hereby declare the nature of this invention to be as follows:-
My tests during many years have resulted in obtaining a bleaching soap that will
answer all requirements of cheapness, easy use, pleasant smell, perfect innocuousness
and thorough effectiveness for washing linen and all sorts of tissues without in
the least corroding them, by using the following ingredients in the proportions
indicated:
I, LUDWIG GROTE, Manager of Works, of 84B East India Dock Road, Poplar, in the
County of London, do hereby declare the nature of this invention to be as follows:-
"
My tests during many years have resulted in obtaining a bleaching soap that will
answer all requirements of cheapness, easy use, pleasant smell, perfect innocuousness
and thorough effectiveness for washing linen and all sorts of tissues without in
the least corroding them, by using the following ingredients in the proportions
indicated:
200 parts by weight of cocoa oil,
وو
caustic soda lye of 35°
150
"
"
"
600
"
"
"
200
""
"
"
500
"
"
"
"
4200
"
"
water.
"
"
,, bleaching soda of the best quality.
,, finely pulverized common salt
soluble glass and
These component parts are all mixed together simultaneously and thoroughly
agitated until the mass is quite uniform throughout, after which it is made into
blocks or balls or any shape desired.
This bleaching soap by the mixture of the above ingredients contains perfectly
dissolved sebacic acid, which in union with the bleaching soda does not act caustically,
but mildly on the tissues under treatment. The soluble glass helps together with the
caustic lye to dissolve the lime contained in the water.
The common salt refreshes the water, prevents it from putrifying and in drying the
linen prevents this to absorb obnoxious substances contained in the air.
No machinery or recipients of special construction whatever are required in the
manufacture of my bleaching soap, which can be made with the plant of any existing
soap factory.
Dated this 11th day of June 1897
I, LUDWIG GROTE, Manager of Works, of 84B East India Dock Road, Poplar, E., in
the County of London, 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 present invention relates to the manufacture of soan which may be need in

page_text: every household for washing as well as for cleaning and bleaching of linen. The soap
which according to the manner of using it can be manufactured in a soft as well as in
a hard state is composed chiefly of soluble glass chloride of magnesium calcined soda,
salt and cocoa nut oil or other fatty substances.
Hitherto all similar soaps contained too many fatty acids not completely saponified
and also too strong admixtures of soda and the like substances which in boiling
corroded the tissues too much and after a few times washing destroyed them.
Now in order to remove similar inconveniences and to obtain a soft soap in which
the sebacic acids are completely saponified I use the following process: I mix
together
2015
"
وو
"
of water,
into which I first have poured 35 parts by weight of a solution of chloride of magnesium
of 35° Baumé or 1,320 spec. weight, and I boil this mixture, stirring it continuously all
the while during three to five bours in a boiler suitable for the purpose. When this
has been done, all the sebacic acids are completely saponified and the soap after having
been poured in forms and left to cool, is finished and ready for use.
This soap prepared by the warm process with the above ingredients remains soft and
does not corrode the tissues in any way during the boiling and through the addition
of calcined soda makes them become as white as snow already in the boiler, so that
bleaching in the open air as necessary with the methods hitherto used can be
dispensed with altogether.
The use of cocoa nut oil or fat in the manufacture of the present soap is to be pre-
ferred to all other oils or fats by reason of the great facility with which it is
saponified.
The soluble glass together with the caustic soda or potash has the quality to absorb
during the ebullition all particles of lime contained in the water, so that it becomes
extremely soft, a quality which every housewife knows how to appreciate.
The larger quantity of commercial salt is necessary to preserve the water as uncon-
taminated and healthy as possible and to diminish the bad smell during the process
of washing dirty linen.
Now to produce more or less with the same means a hard household soap and
especially to avoid the usual efflorescence and exudation of caustic soda or potash or
other salts not completely saponified in similar soaps I use the cold process by
mixing the following ingredients: I first prepare a solution of caustic soda or potash
of 1,370 specific weight equal to 40 degrees Baumé, then a solution of chloride of
magnesium of 1,320 specific weight equal to 35° Baumé which I dilute with 12 parts
by weight of water.
Of this solution of chloride of magnesium I take 17 parts and mix them with
45 parts of the solution of soda referred to before. After this mixture has been made
and left standing for one half to one hour, I add to it under constant stirring 55 parts
of a solution of soluble glass of 1,360 specific weight equalling 38 degrees Baumé, and
likewise 20 parts of cocoa nut oil which has been warmed up previously, together with
a little bitter almond oil in order to give the soap a pleasant smell.
When the above mentioned ingredients have all been thoroughly mixed together
in the cold way the mixture gradually thickens, whereupon it is put into the moulds.
It goes without saying that according to the purposes for which the soap is
destined the proportions of mixture may be variously altered.

page_text: The soap now ready for use gradually acquires the usual hardness and besides its
economy in use distinguishes itself by the qualities already above more particularly
set out. It must be specially mentioned that this soap becomes to a considerable
degree neutral, because all alkalis eventually contained in the soap are sufficiently
neutralised.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. A process for the manufacture of soap, characterized by the fact, that as above
described a mixture of solutions of caustic soda or potash, calcined soda, salt, soluble
glass and chloride of magnesium with the addition of cocoa nut oil is boiled, while it
is all the time stirred for the purpose of obtaining a soft soap containing perfectly
saponified sebacic acids which being used will at the same time clean the linen from
dirt and bleach it.
2. A process for the manufacture of soap, characterized by the fact, that as above
described a mixture of solutions of caustic soda or potash, chloride of magnesium,
soluble glass and cocoa nut oil are mixed together in a cold state for the purpose of
producing a hard soap in which the objectionable efflorescence or exudation of salts is
prevented.
Thi. 19th day of Novamban 1907