A Bleaching Preparation or Mixture, applicable also for other purposes.
Year: 1894

page_text: A Bleaching Preparation or Mixture, applicable also for other
purposes.
I HENRY WÄCHTER of Bielefield in the German Empire Laundry Proprietor
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:
Hitherto white lime and soda have been used for bleaching. This process how-
ever, has an injurious effect upon the fibres of the material which it partly destroys
by its strong action.
Until now it has been impossible to use very pure tough and adhesive lime
("Fettkalk") on account of its caustic action. In order to obtain a better prepara-
tion than that generally in use hitherto, very pure tough and adhesive lime
("Fettkalk") and soda are employed and to deprive the lime and the soda of their
caustic properties zinc tin or other metals, a solution of chlorine, oil or other fats
are used. To every kilogram of soda, 300 grams of lime, 100 grams of zinc, tin or
similar metals, kilogram of solution of chlorine, 300 grams of oil or other fats and
1 kilogram of water are added. This mixture is boiled together and stirred
slightly until a perfect fluid mass is obtained. By the addition of zinc, tin or
similar metals, chlorine in solution, oil or other fats, the mixture becomes a soap-
like mass and the water is eliminated, hydrogen being generated; by repeated
stirring the mixture is turned into a pulverulent mass and may then be used for all
materials without injuring them. The materials require to be boiled only half the
time required with soda and lime; chlorine baths in the bleaching operation may
also be reduced by half and nevertheless a greater whiteness will be obtained and
the materials need not be exposed to the air. By the addition of zinc, tin or
similar metals, solution of chlorine, oil or other. fats, gases and acids having
bleaching action are evolved. For the purpose of fixing the same, after the boiling
of the mixture, tin, zinc and similar metals are introduced, whereby the gases and
acids are brought on the surface of the mixture and on becoming cool by the contact
of the air they turn into a salt-like mass and are then converted, by stirring, into a
pulverulent mass, the mixture may then be used for all materials.
a
After each boiling operation, the materials to be bleached are put for a short
time in cold water and rinsed and the boiling and the chlorine baths may then be
used as in the bleaching operation.
In the case of boring and shaping machines, 1 pound of the preparation described
above is added to 15 litres of water, the whole is allowed to boil for a few minutes
and then to get cool. A perfect substitute for petroleum, oil or soap water as used
for the above-mentioned machines, is obtained. This mixture keeps for months
and prevents the formation of any rust whatever on metals.
This new bleaching preparation may also be used to purify petroleum. The
petroleum when purified by the said preparation becomes as clear as water and
acquires a much greater illuminating power and is more economical in the
combustion.
In the manufacture of paper and cellulose, the new preparation may also be very
efficiently applied, as it not only removes all resinous and colouring matters more
rapidly and with greater energy, but the boiled fibres retain also much more easily
their desired spongy state.

page_text: Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed I declare that what
I claim is :-
A bleaching preparation or mixture composed of tin, zinc or similar metals,
solution of chlorine and oils or fats added to soda lime and water substantially as a
described.
T
E. P. ALEXANDER & SON,
Fels. Chartered Inst. Patent Agents,
19, Southampton Buildings, Chancery Lane, London, W.C.,
Associate Agents.