Fushun
Research Institute of Petroleum and Petrochemicals
(FRIPP) has developed technology and appropriate
catalysts for medium-pressure wax hydrofining. The
catalysts have been commercialized in 11 wax
hydrofining units with a total annual processing
capacity of over 900 thousand tons, dominating over
80% of the domestic market. The technology with
appropriate catalysts shows good quality of refined
waxes, high product yield, flexible operation and
almost no pollution by waste gases, waste solid-liquid
materials. The commercial results show that the newly
developed Catalyst FV-1 has higher hydrofining
activity, better stability and mechanic strength than
those of Catalyst 481-2B. Catalyst 481-2B has been now
widely used by refiners. FV-1 is the first one to be
applied in the process at low temperature, medium
pressure, high velocity and low hydrogen-wax ratio in
China.
Hydrofining
of paraffin waxes is a deep refining process under
moderate reaction temperature for treating wax feeds
with high-melting point and inferior quality. This
technology is based on two reactors in series, one is
for de-coloring and the other for aromatics
saturating. Through optimizing the operating
conditions of the catalysts, high quality wax products
can be obtained which can meet the special
requirements of food, medical, and cosmetics
production. The combination of the feed pre-treatment
and refining process may cut down the excessive
demands for wax hydrofining, and allow to have
flexible processing according to the properties of
feeds.
This
paper descusses the performance of MF series specialty
waxes for emulsion explosives, DT type of specialty
waxes for low TNT powder explosive and FR type of
specialty waxes for powder emulsion explosive. These
specialty waxes were produced by using waxes obtained
from heavy fractions of petroleum as raw material. The
performance tests were excellent and reached the
international advanced standards. The explosives
produced using these waxes showed faster speed of
explosion and longer storage period. The perfromance
met the National Standards and Standards of the
Minister.
In this
paper, a new technique for producing lubricant base
and food grade paraffin wax using hydrocracker tail
oil as feedstock is presented. The process includes
three continuous steps: cutting of feed, dewaxing and
deoiling of the wax by solvents, and additional
treatment by clay. Hydrocracker tail oil could be
fully used by this process and its products meet the
specifications of HVI lubricant base and food grade
paraffin wax.
This
paper mainly discusses the principal reactions of
white oil hydrofining and introduces a two-stage
hydrofining technology for producing white oil. The
test results obtained by FRIPP, the operating
parameters of the two-stage technology for white oil
hydrofining and the feasibility for producing white
oil and sulfonate by combination of sulfonating and
hydrofining processes are also discussed.
Technology
for prodicing high-grade paving asphalt, according
with the new specifications of SINOPEC standards, has
neen developed and commercialized. This technology
includes vacuum distillation, semi-oxidation, solvent
deasphalting and blending processes, and has been
successfully used in production of high-grade paving
asphalt using crude oils imported from Saudi Arabia,
Kwait, Oman, Iran and domestic SZ36-1 crude oil from
Bohai oilfield. According to the evaluation results of
asphalt binder and aggregate, the paving performance
of asphalts produced by this technology reaches the
standards of imported high-grade asphalts. These
asphalt products have been applied in highway
construction in China.
The
modification effects and mechanism of various polymer
modifiers are described. A method has been proposed
for improving the storage stability of SBS modified
asphalts. Addition of appropriate stabilizer can
promote polymer to disperse steadily into asphalt
base. By studying the production technology, a
premixing-method for producing modified asphalts, has
been developed and commercialized. The SBS and SBR
polymer- modified asphalt products can meet the
specifications issued by the Communication Ministry,
and SHRP binder grading standards. The characteristics
of asphalt products, such as performance at high- and
low-temperature and anti-aging, can meet the
requirements of domestic market for construction of
express way.
The
aim of this paper is to summarize the applications of
asphalt concrete seepage-proofing technology in the
hydro-engineering and hydraulic power engineering.
Hydraulic asphalt, produced from imported crude oils
and Bohai Suizhong 36-1 crude oil uing different
methods, has good performance at both high-temperature
and low-temperature and good aging resistance
performance. The performance evaluation by using the
blended asphalts showed that its bend resistance
ability, aging resistance and water-proofing
performance, infiltration resistance ability were
quite well, suitable for concrete structure of the
hydraulic asphalt. Bohai Suizhong 36-1 hydraulic
asphalt has been used on the Three-Gorge hydraulic
power-engineering project.
