Hydrocarbon Processing - November 2021 - 60

Sustainability
vestment (25%), wastewater discharge
(70%-80%) and energy consumption
(> 35%). The authors' company began
research on its HPPO process in 2003,
and put it into industrial demonstration
on a 100-kt·a-1
unit, which is shown in
FIG. 3. Process highlights include:
1. A hollow TS-1 zeolite with Si
enriched on the surface.15,16
The company found that the
acidity of catalyst is the main
factor that accelerates the
solvolysis of propene oxide,
and the acidity comes from Ti
active centers, trace Al, defects
of surface and lattice in TS-1
zeolite. Therefore, the synthesis
process of the hollow TS-1 zeolite
was modified to enrich Si on the
surface of hollow TS-1 zeolite-
which is different from the
hollow TS-1 zeolite used in the
cyclohexanone ammoximation
reaction-increasing the
selectivity of propene oxide
to higher than 95%.
2. Amorphous SiO2
and other
additives are added into
the hollow TS-1 catalyst to
increase the crushing strength
of the catalyst to higher than
120 N·cm-1
the catalyst activity and fixedbed
reactor utilization.17,18,19
The conversion of H2
high-selectivity, the in-situ regeneration
technology of deactivated catalyst, the
design and manufacturing technology of
large-scale tubular reactor, and the safety
control technology of the whole process.
The 1 kt·a-1
pilot-scale test shows that
the HPPO process can convert 96%-
99% H2
O2 with a 96%-98% selectivity
of propene oxide. After the catalyst runs
for 6,000 hr, no significant change in activity
was detected.17
7
In 2020, the techpassed
the
nology package of the HPPO process
with a capacity of 300 kt·a-1
technical appraisal.
Takeaway. The authors' company has
developed full-process green chemical
technologies of CPL and propene oxide
production, including an important
supporting technology: the slurry bed
technology for H2
O2 production, which
provides a stable and reliable source of
H2
O2 for the development and industrial
slurry bed producO2
is sufficient to support
13
O2
without decreasing
O2 could
reach higher than 96% with 95%
selectivity of propene oxide.
3. The in-situ catalyst regeneration
technology of deactivated
catalyst with solvent extraction
was developed by the authors'
company.17
The life span of
regenerated catalyst is equivalent
to fresh catalyst, and the catalyst
activity is well restored.
4. A two-stage, fixed-bed reactor
in series was adopted.17
This
technology not only solves
problems caused by the strong
exothermic effect of the HPPO
process, but also realizes the
continuous production of propene
oxide combined with the in-situ
catalyst regeneration technology.
The company has successively developed
the synthesis technology of hollow
TS-1 zeolite with Si enriched on the
surface, the preparation technology of
high-strength hollow TS-1 catalyst with
60 NOVEMBER 2021 | HydrocarbonProcessing.com
production and green hydrocarbon nitridation/oxidation
technologies with
H2
O2 to produce CPL and propene oxide
developed by the authors' company
have provided the whole-process technical
support for two chemical production
bases: Gulei and Baling. The Baling
offsite construction project was regarded
as a benchmark by the Chinese government
for the relocation of hazardous
chemical production plants along the
Yangtze River. The production technologies
for H2
O2, CPL and propene oxide
have greatly promoted the development
of China's green chemical industry.
ACKNOWLEDGMENTS
The authors gratefully acknowledge the financial
support from the National Natural Science Foundation
of China (U19B6002) and National Key R&D Program
of China (2016YFB0301600).
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BAONING ZONG is a Professor
and Chief Specialist in the
petrochemical field at Sinopec's
Research Institute of Petroleum
Processing. He also serves as the
Director of the State Key Laboratory
of Catalytic Materials and Reaction
Engineering, where he is engaged in the research of
catalytic materials and reaction engineering.
YANQIANG SHI is an Engineer in
the field of material characterization
at Sinopec's Research Institute of
Petroleum Processing, and is now
engaged in the research of chemical
green synthesis.
BIN SUN is a Professor in the field
of organic chemicals at Sinopec's
Research Institute of Petroleum
Processing, and is mainly engaged in
the development of petrochemical
and organic chemical technologies.
patent:
http://www.HydrocarbonProcessing.com
Hydrocarbon Processing - November 2021

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