The enlarged-scale pilot unit for C4 olefin disproportionation constructed jointly by SINOPEC and ABB Lummus at the Ethylene Plant of Tianjin Petrochemical Company has successfully produced a qualified hexene-1 produc...The enlarged-scale pilot unit for C4 olefin disproportionation constructed jointly by SINOPEC and ABB Lummus at the Ethylene Plant of Tianjin Petrochemical Company has successfully produced a qualified hexene-1 product with its purity reaching 99.33%, which has symbolized a great breakthrough in disproportionation of C4 olefins.展开更多
1 Introduction
China has enforced a new gasoline standard starting 2003 to limit the olefins, aromatics and benzene contents in gasoline.The isomerate is the cleanest gasoline component because it does not contain the...1 Introduction
China has enforced a new gasoline standard starting 2003 to limit the olefins, aromatics and benzene contents in gasoline.The isomerate is the cleanest gasoline component because it does not contain the above-mentioned components, and is also an excellent gasoline blending component because of its higher RON and MON ratings.展开更多
Polymer-supported RCpCpTiCl2(Cp=η^5-C5H4;RCp=η^5-RC5H4)have been prepared and reduced by i-C3H7MgBr in situ，then used in catalytic isomerization of 1,5-hexadiene.The isomerization of 1,5-hexadiene leads to a mixtur...Polymer-supported RCpCpTiCl2(Cp=η^5-C5H4;RCp=η^5-RC5H4)have been prepared and reduced by i-C3H7MgBr in situ，then used in catalytic isomerization of 1,5-hexadiene.The isomerization of 1,5-hexadiene leads to a mixture of cyclic and linear products.The ratio of cyclic to linear product depends on the nature of the supporter and the substituent on the cyclopentadienyl ring.The former contributes the most,for example,silica supported Cp2 TiCl2 gave cyclic-linear ratio of 99/1,while for polymer-supported Cp2TiCl2 species,linear compounds are the major products and the ratio of cyclic to linear product changes with different R groups on the cyclopentadienyl ring.展开更多
Peptide nucleic acid containing azobenzene (N-PNA) was covalently bound on chip surfaces. Complementary DNA probes labeled by gold nanoparticles hybridizated with PNA on chip surfaces. The hybridization was successful...Peptide nucleic acid containing azobenzene (N-PNA) was covalently bound on chip surfaces. Complementary DNA probes labeled by gold nanoparticles hybridizated with PNA on chip surfaces. The hybridization was successfully detected with AFM by the microscopy mothed. The influences of the position and the cis-trans isomerization of azobenzene unit on hybridization were investigated with AFM.展开更多
文摘The enlarged-scale pilot unit for C4 olefin disproportionation constructed jointly by SINOPEC and ABB Lummus at the Ethylene Plant of Tianjin Petrochemical Company has successfully produced a qualified hexene-1 product with its purity reaching 99.33%, which has symbolized a great breakthrough in disproportionation of C4 olefins.
文摘1 Introduction
China has enforced a new gasoline standard starting 2003 to limit the olefins, aromatics and benzene contents in gasoline.The isomerate is the cleanest gasoline component because it does not contain the above-mentioned components, and is also an excellent gasoline blending component because of its higher RON and MON ratings.
文摘Polymer-supported RCpCpTiCl2(Cp=η^5-C5H4;RCp=η^5-RC5H4)have been prepared and reduced by i-C3H7MgBr in situ，then used in catalytic isomerization of 1,5-hexadiene.The isomerization of 1,5-hexadiene leads to a mixture of cyclic and linear products.The ratio of cyclic to linear product depends on the nature of the supporter and the substituent on the cyclopentadienyl ring.The former contributes the most,for example,silica supported Cp2 TiCl2 gave cyclic-linear ratio of 99/1,while for polymer-supported Cp2TiCl2 species,linear compounds are the major products and the ratio of cyclic to linear product changes with different R groups on the cyclopentadienyl ring.
基金Supported by "973" Project of the Ministry of Science and Technology of China (Grant No. 2007CB607605)National Natural Science Foundation of China (Grant No. 20473106)
文摘Peptide nucleic acid containing azobenzene (N-PNA) was covalently bound on chip surfaces. Complementary DNA probes labeled by gold nanoparticles hybridizated with PNA on chip surfaces. The hybridization was successfully detected with AFM by the microscopy mothed. The influences of the position and the cis-trans isomerization of azobenzene unit on hybridization were investigated with AFM.
