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SULFIX PPA-resistant H
2
S
scavenger program for asphalt
Mitigate hydrogen sulfide regeneration
during production and blending
The chemical binders used in asphalt
manufacturing are often modified using
a variety of techniques to improve their
properties and performance, enabling
terminal operators to enhance the
value of asphalt products. In North
America particularly, binders such as
polyphosphoric acid (PPA) have been
used for many years. During asphalt
refining, hydrogen sulfide (H
2
S) levels
can be a serious HSE concern, requiring
a H
2
S scavenger program to help
mitigate the risk. However, mixing a PPA
modifier into the scavenged asphalt
product can pose an additional threat
as it can trigger the regeneration of H
2
S.
The resulting reaction can significantly
increase HSE hazards and operational
risks if not properly treated.
This issue has become a growing
concern for asphalt terminal operators,
as current treatment programs are
unable to prevent PPA-based H
2
S
regeneration at economical dosage
rates. To help find a safer solution,
Baker Hughes developed the SULFIX™
PPA-resistant hydrogen sulfide
scavenger program. This program
helps mitigate H
2
S released from
asphalt and bitumen products while
resisting H
2
S reversion caused by PPA
modification. The SULFIX PPA-resistant
H
2
S hydrogen sulfide scavenger can be
injected during the asphalt modification
process at the terminal or, alternatively,
can be added to asphalt during the
production process. The reaction of the
SULFIX PPA-resistant scavenger with H
2
S
is fast and irreversible under standard
asphalt manufacturing conditions and
resistant to H
2
S regeneration under PPA-
modified conditions.
The scavenger is an ideal treatment for
applications that require immediate
H
2
S reduction or where retreatment of
asphalt after PPA modification is not
economical. Treating the asphalt with
the SULFIX PPA-resistant scavenger
program helps minimize your safety
risks while also protecting downstream
transportation and storage equipment
from H
2
S-induced corrosion, offering
you additional economic benefits.
Contact your Baker Hughes representative
to learn how a SULFIX PPA-resistant
scavenger program can help
you reduce HSE and operational
concerns when blending asphalt with
polyphosphoric acid.
Applications
• Asphalt terminals
• Asphalt production
modification facilities
Benefits
• Reduce employee safety
risks, comply with environmental
regulations, and minimizes
related CAPEX with properly
chemical treatment
and application
• Lessen mitigation logistics
and cost with a single
treatment solution
• Decrease emissions, odor, and
corrosion caused by H
2
S
• Stabilizes asphalt quality
due to metal-based
scavenger technology program
