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Big bags of sodium percarbonate
ready to be shipped
to destinations worldwide
dur ing delivery of the material from the storage
silo to the production process. Based on elaborate
safety measure ments and models, Evonik was
able to show that granulated percarbonate is ideal
for use under extreme climatic and production
conditions. But because transport law defines it as
a hazardous material with special requirements,
Evonik also analyzed the transport of percarbonate
from its own production plants to the laundry
detergent factories of its clients across the globe.
Certain laundry detergents in the growth markets
of the Middle East and Africa already contain
granulated percarbonate from Evonik, even
though the worldwide transition from perborate
to percarbonate is still underway. Benefiting from
its technological leadership position and a superior
product quality developed in recent years, Evonik
is being recognized as a reliable and competent
partner to the global consumer goods industry. l
elements32 evonik science newsletter
c o A t i n G & B o n D i n G t e c H n o l o G i e S
Bleaching salt for special applications
the bleaching agent percarbonate is the primary component
of most conventional bleaching salts. in addition to stain
removal in the laundry, the “active oxygen” that forms as
the percarbonate dissolves in water has other practical uses.
examples:
Coffee and tea pots
Dissolves the calcium­caffeine complex that leaves a brown
film on the porcelain. to remove the film, fill the pot with
warm water and add a spoonful of bleaching salts. Allow
the salts time to work (they will foam), then rinse the pot
thoroughly with water. You can also add a small drop of
dish washing liquid for greater cleaning effect.
Tar and oil stains on tiles and stoneware
the active oxygen “inserts” itself under the tar/oil film,
decomposes there, and the oxygen generated dissolves the
film off the subsurface.
Organic waste bins
Prevents unpleasant smells. combined with the activator
(tAeD) contained in the bleaching salt, percarbonate forms
peracetic acid, which kills bacteria. Peracetic acid is environmentally
safe because it breaks down into oxygen and acetic
acid.
Fish pond
keep silt from overtaking your pond. the percarbonate
brings active oxygen to the silt without injuring the fish (as
long as the correct amount is used). the soda in the percarbonate
also acts as a neutralizing agent on overacidified
ponds.
Mold stains
on tile grout, for example: mix the bleaching salt with
enough water to make a paste (wearing rubber gloves),
apply the paste to the mold stain, allow to work, then
rinse with water.
DR. STEFAN LEININGER
Stefan leininger is in charge of application engineering
for the non­Pulp & Paper unit of the Active oxygens
Business line, and manages product and process
development for detergent base materials. in this latter
role, he works closely with customers on the global
transition from perborate to percarbonate. leininger
earned his doctorate in chemistry at the University of
kaiserslautern in 1996, and then spent three years in
research at the University of Utah in the United States
before coming to evonik in 1999. Among his activities
prior to starting in his current position in 2004,
leininger was involved in the development of titanium silicate catalyzed chemical
processes for ammoximation and epoxidation based on hydrogen peroxide.
+49 6181 59-3295, stefan.leininger@evonik.com
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