Yangzhou, China
Yangzhou, China

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Yao R.,Yangzhou Petrochemical Co. | Gao Y.,Petrochina
Petroleum Processing and Petrochemicals | Year: 2012

The optimization of highly selective conversion zone for olefin rich light gasoline in MCP (Maximizing Catalytic Propylene) process was studied and its industrial application at Yangzhou Petrochemical Co. , Ltd was disclosed. The results of industrial application showed that in the selective conversion zone, when adopting the technique of regenerated catalyst met heavy recycle oil (HCO) prior to light gasoline feed in, at a HCO recycle amount of 0. 3 t/h, the mass fraction of propylene in LPG could be increased by 2. 34 percentage points and the propylene yield could be increased by 0. 84 percentage points. The selective located coke on the catalyst formed by the contact of HCO with hot regenerated catalyst could enhance the shape selective function of molecular sieve catalyst, which resulted in converting light gasoline to more propylene.

Yao R.,Yangzhou Petrochemical Co.
Petroleum Refinery Engineering | Year: 2012

The commercial application of MCP (Maximizing Catalytic Propylene) process in the revamping of an existing ARGG unit in Yangzhou Petrochemical Co., Ltd is described. MCP process highlights the optimization of highly selective conversion zone for olefins. The gasoline, rich in olefin and generated in the first riser, is separated to two fractions, the light gasoline and the heavy gasoline. The light gasoline is fed to the second riser, where the olefins in gasoline are converted into objective product of propylene. When contacting hot regenerated catalyst with heavy recycle oil (HCO) prior to light gasoline feed in the selective conversion zone, the coke deposited on the catalyst can enhance selective conversion of gasoline by the shape selective molecular sieve catalysts, which results in increased propylene production. The performance test results demonstrate that the product distribution is optimized. The mass concentration of the propylene and the isobu-tylene in the LPG is increased by about 24. 4%. RON of the gasoline and cetane number of the diesel are elevated by 1 and 6 units respectively. The economic benefits is significant.

Xie C.,Sinopec | Gao Y.,Sinopec | Yao R.,Yangzhou Petrochemical Co. | Xu T.,Chang Ling Petrochemical Yueyang Engineering Co.
Petroleum Processing and Petrochemicals | Year: 2014

Based on the new findings of the primary cracking of heavy oil and the secondary cracking of middle streams, a MCP technology (Maximizing Catalytic Propylene from heavy oil) was developed. The first industrial trial was conducted in a commercial-scale demonstration unit of MCP with capacity of 250 kt/a from an existing ARGG unit modification. The results of industrial calibration of MCP technology show that when the atmospheric residue of Jiangsu crude oil is used as the feedstock, yields of propylene and isobutylene are 17. 05 % and 5. 51 %, respectively. RON of gasoline and cetane index of gasoline and LCO are 94. 6 and 30, respectively. The total liquid yield is 80. 23%. Compared with ARGG, the yield of propylene and isobutylene increases by 8, 09 percentage pionts and 2. 52 percentage pionts, respectively, while the coke reduces by 2. 03 percentage pionts. The unit of MCP has stably run for nearly 3 years with good economic and social benefits.

Riyuan Y.,Yangzhou Petrochemical Co. | Peng W.,Petrochina | Haiyan G.,Yangzhou Petrochemical Co. | Huiping T.,Petrochina
Petroleum Processing and Petrochemicals | Year: 2010

In order to reduce the olefin content in FCC naphtha and meanwhile produce propylene in high demand, the onsite test of side-stream for selective cracking olefins in FCC naphtha to produce propylene was carried out in Yangzhou Petrochemical Company. A 20 kg/h test device was set up for this commercial trial and molecular sieve coated monolithic catalysts were used. Results showed that under optimized process parameters while reducing the olefin content in FCC naphtha, the selectivity for light olefins (ethylene, propylene and butenes) in gaseous product could be more than 80%, in which the selectivity of propylene reached 30%-40%.

Yao R.,Yangzhou Petrochemical Co. | Yao R.,Yangzhou University | Diao G.,Yangzhou University | Xu D.,Yangzhou Petrochemical Co.
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2013

Polypropylene(PP) containing high content of β-crystal (β-PP) was prepared with small scale bulk PP process in a polymerization reactor by introducing the β-nucleating agent into the reactor prior to propylene polymerization. Adding small amounts of β-nucleating agent did not decrease the activity of the catalyst greatly, and did not cause substantial effect on the relative molecular mass and its distribution of the PP product. The relative content of β-crystal in the β-PP product could reach over 85% when the mass fraction of the nucleating agent was 0.08%-0.12% according to the results of wide angle X-ray diffraction (WAXD). Differential scanning calorimetry (DSC) analysis and mechanical properties test revealed that the crystallization rate of the β-PP was much higher than that of conventional PP without β-nucleating agent, and the β-PP had excellent toughness.

Kong L.,Yangzhou University | Zhang T.,Yangzhou University | Wang P.,Yangzhou Petrochemical Co. | Zhou X.,Yangzhou University | Jia Z.,Yangzhou University
Huagong Xuebao/CIESC Journal | Year: 2015

Activated carbon fiber (ACF) was used for the adsorption of phenol in petrochemical wastewater. Adsorption isotherms at 25, 40, 55 and 65℃ were determined and fitted with Langmuir, Freundlich and Redlich-Peterson equations. The results show that the adsorption equilibrium data fit Langmuir and Redlich-Peterson equations better than the Freundlich equation. The phenol adsorption ability of ACF from simulated wastewater decreases with the increase of temperature, while the situation is somewhat different with petrochemical wastewater. The adsorption kinetic data fit the pseudo-second-order kinetic model well in petrochemical wastewater and simulated wastewater. The intra-particle diffusion is the main rate-controlling step in the initial period and kid of phenol adsorption increases with temperature in petrochemical wastewater. The adsorption rate is influenced by intra-particle diffusion and external diffusion in the middle and later period. Thermodynamic analysis shows that the ΔG value is negative, indicating that the adsorption of phenol in petrochemical wastewater by ACF is spontaneous. However, ΔG does not change obviously with temperature owing to the influence of oil on phenol adsorption in petrochemical wastewater. © All Right Reserved.

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