The catalytic cracking of a FCC gasoline fraction （IBP--75℃） provided by the refinery No. 2 of Fushun Petrochemical Company was carried out in a continuous fixed fluidized bed reaction apparatus in the laboratory, ...The catalytic cracking of a FCC gasoline fraction （IBP--75℃） provided by the refinery No. 2 of Fushun Petrochemical Company was carried out in a continuous fixed fluidized bed reaction apparatus in the laboratory, using the modified HZSM-5 as the catalyst. The effects of the reaction temperature and loading of lanthanum on the modified HZSM-5 catalyst on the FCC product distribution were investigated. The results showed that the yield of propylene was as high as 39.28% and the yield of aromatics reached 23.57% when the loading of La in the HZSM-5 catalyst was about 8%, when the reaction was carried under atmospheric pressure and at a reaction temperature of 500~550℃and a spatial velocity of 4.5 h^-1. The yield of aromatics dropped by 6.29% during catalytic cracking of gasoline in the presence of the zeolitic catalyst modified with 8% La.展开更多
This article refers to the application of DOCO olefin-reducing catalyst developed by RIPP and manufactured by the Catalyst Factory of Changling Refining and Chemical Company in the 1.4 Mt/a RFCCU at Daqing Petrochemic...This article refers to the application of DOCO olefin-reducing catalyst developed by RIPP and manufactured by the Catalyst Factory of Changling Refining and Chemical Company in the 1.4 Mt/a RFCCU at Daqing Petrochemical Company. Results of operation over two months had revealed that this catalyst had good olefin-reducing ability and heavy oil converting ability adapted to paraffinic feedstock. The gasoline olefin yield had been reduced to 36.1 v% from 54.2 v% with gasoline RON rating decreased by 1.4 units. The induction period of gasoline had significantly increased to 952 mm, while the coke yield was increased by 0.05 percentage point with light oil yield dropping by only 0.02 percentage point. The FCC product distribution is favorable.展开更多
The commercial application project for reducing the sodium content in raw nitrobenzene which was performed by the Research Institute of the SINOPEC Nanjing Chemical Company(NCC)has passed the appraisal organized by th...The commercial application project for reducing the sodium content in raw nitrobenzene which was performed by the Research Institute of the SINOPEC Nanjing Chemical Company(NCC)has passed the appraisal organized by the Science and Technology Division of the Sinopec Corp.The appraisal team has recognized that the overall technology of this project has reached the internationally advanced level.展开更多
Sixty six water samples were collected from inlets, inside and outlets of cooling towers （22 samples each, once a week）. Samples were screened for bacterial colonization with special focus on Legionella. Percentage ...Sixty six water samples were collected from inlets, inside and outlets of cooling towers （22 samples each, once a week）. Samples were screened for bacterial colonization with special focus on Legionella. Percentage occurrence of predominant bacteria present in water samples collected from inlets included： Klebsiella （95.45%）, Enterobacter （90.9%）, Pseudomonas （86.36%）, Escherichia coli （81.81%）, and Legionella （72.72%）. While those predominant in water inside cooling towers were： Pseudomonas （100%）, Staphylococci （81.81%）, Legionella （81.81%） and Bacillus （72.72%）. Incidence of Legionella recovered from inside and outlets of cooling towers sites was similar. Four species of Legionella were identified in water samples collected from inlets, inside and outlets of cooling towers, in the following consecutive frequencies L. pneumophila （72.72%, 81.81% and 81.81%）, L. jordans （18.18%, 36.36% and 27.27%）, L. dumffii （9.09%, 22.72% and 22.72%） and L. oekidegenes （4.54%, 13.63% and 18.18%）. The increased percentage occurrence of Legionella in water collected from inlets and inside cooling towers, as well as those of Pseudomonas and Staphylococci suggest that Legionella is also a hardy organism, being potentially survive as free organism despite water disinfection.展开更多
文摘The catalytic cracking of a FCC gasoline fraction （IBP--75℃） provided by the refinery No. 2 of Fushun Petrochemical Company was carried out in a continuous fixed fluidized bed reaction apparatus in the laboratory, using the modified HZSM-5 as the catalyst. The effects of the reaction temperature and loading of lanthanum on the modified HZSM-5 catalyst on the FCC product distribution were investigated. The results showed that the yield of propylene was as high as 39.28% and the yield of aromatics reached 23.57% when the loading of La in the HZSM-5 catalyst was about 8%, when the reaction was carried under atmospheric pressure and at a reaction temperature of 500~550℃and a spatial velocity of 4.5 h^-1. The yield of aromatics dropped by 6.29% during catalytic cracking of gasoline in the presence of the zeolitic catalyst modified with 8% La.
文摘This article refers to the application of DOCO olefin-reducing catalyst developed by RIPP and manufactured by the Catalyst Factory of Changling Refining and Chemical Company in the 1.4 Mt/a RFCCU at Daqing Petrochemical Company. Results of operation over two months had revealed that this catalyst had good olefin-reducing ability and heavy oil converting ability adapted to paraffinic feedstock. The gasoline olefin yield had been reduced to 36.1 v% from 54.2 v% with gasoline RON rating decreased by 1.4 units. The induction period of gasoline had significantly increased to 952 mm, while the coke yield was increased by 0.05 percentage point with light oil yield dropping by only 0.02 percentage point. The FCC product distribution is favorable.
文摘The commercial application project for reducing the sodium content in raw nitrobenzene which was performed by the Research Institute of the SINOPEC Nanjing Chemical Company(NCC)has passed the appraisal organized by the Science and Technology Division of the Sinopec Corp.The appraisal team has recognized that the overall technology of this project has reached the internationally advanced level.
文摘Sixty six water samples were collected from inlets, inside and outlets of cooling towers （22 samples each, once a week）. Samples were screened for bacterial colonization with special focus on Legionella. Percentage occurrence of predominant bacteria present in water samples collected from inlets included： Klebsiella （95.45%）, Enterobacter （90.9%）, Pseudomonas （86.36%）, Escherichia coli （81.81%）, and Legionella （72.72%）. While those predominant in water inside cooling towers were： Pseudomonas （100%）, Staphylococci （81.81%）, Legionella （81.81%） and Bacillus （72.72%）. Incidence of Legionella recovered from inside and outlets of cooling towers sites was similar. Four species of Legionella were identified in water samples collected from inlets, inside and outlets of cooling towers, in the following consecutive frequencies L. pneumophila （72.72%, 81.81% and 81.81%）, L. jordans （18.18%, 36.36% and 27.27%）, L. dumffii （9.09%, 22.72% and 22.72%） and L. oekidegenes （4.54%, 13.63% and 18.18%）. The increased percentage occurrence of Legionella in water collected from inlets and inside cooling towers, as well as those of Pseudomonas and Staphylococci suggest that Legionella is also a hardy organism, being potentially survive as free organism despite water disinfection.
