Sulfuric and Nitric Acid
PLINKE offers a wide variety of separation, purification and concentration process combinations for
mixed acids of Sulfuric and Nitric Acid with all type of organic and volatile contaminants. For explosive
spent acids there are different types of stabilization and decomposition pre-treatment units available.
Such pre-treated acid can be separated, purified and concentrated in Denitration DEN®, Nitric Acid
pre- and high concentration NAPC® and NACSAC® and Sulfuric Acid Concentration SAC® units. Each
spent acid has its own requirement for handling and final product quality. Final product may be
re-used in the originating process or even sold to other users in different applications. PLINKE has more
than 60 years of experience of safe handling of all type of different spent acids and is able to conduct
laboratory tests for new spent acids. Relevant NOx-absorption completes the technology portfolio.
Spent Nitration Acids
with extremely high purity opens a
NOx-Absorption
Below is an extract of products for
wide field of re-use of such acids.
All nitrous gases produced during treat-
which the respective spent acid from
ment can be recovered as Nitric Acid
their nitration has been successfully
Nitro Toluene Spent Acids
treated and re-concentration by PLINKE
PLINKE is the leading supplier of plants
technology, e. g.
for re-concentration of NT spent acids.
A Nitroester (e. g. NC, EGDN, DEGDN,
In this application a combination of
NG, PETN, MTN, BTTN)
regeneration of Sulfuric Acid and reco-
A Nitroaromatics (NB, MNT, DNT, TNT,
very of Nitric Acid is successfully used
Picric Acid, DNAN)
in a DEN® NAC® SAC® process. Pre-
A Nitroguanidine (Nigu)
treatment and stripping process ensure
A Nitroamine (RDX, HMX)
a safe destruction of instable by-products as well as a high effective de-
Safe Treatment of Explosives
sorption of NOx and volatile organic
Spent Acids
compounds. Therefore, pure Sulfuric
Sensitive spent acids, e. g. originated
Acid can be recycled to the nitration
by the production of several nitro es-
process.
ters, have to be stabilized for safe
handling. Due to economic reasons the
Effluent water with high acid content
stabilization step is often combined
Several production processes e. g. Nitro-
with the reconcentration of the acids.
toluene (NT) or Nitrocellulose (NC) pro-
The PLINKE DEN NAC SAC proces-
duce beside the spent acid also wa-
ses are used for regeneration of such
shing waters with significant acid con-
spent acids by denitration of the Sulfu-
tent. Depending of the overall production
ric Acid and production of high con-
scheme such waters can be treated to-
centrated Nitric Acid and high concen-
gether with the spent acid in a DEN®
trated Sulfuric Acid for recycling.
SAC® or separately in a NAPC® unit
Especially PLINKEs proprietary high
producing a total acid content of up to
temperature technology for concentra-
68 %.
®
®
®
ting Sulfuric Acid up to > 96 % H2SO4
using the PLINKE NOx-absorption.
Process schemes
Effluent Gas
Nitric Acid
Spent Acid
Effluent Gas
Steam
Effluent Water
Steam
Concentrated
Sulfuric Acid
DEN®SAC®
Plinke GmbH
Kaiser-Friedrich-Promenade 24
61348 Bad Homburg
Tel.: +49 6172 126-0
Fax:+49 6172 126-8990
[email protected]
www.plinke.de
Member of the Chematur Group
www.chematur.se