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Interaction between the Components of FeCl_3-Al(i-Bu)_3-bipyridine Catalyst

Petroleum Science 2005年第1期2卷 66-69页

作者： songzhaozheng GeJijiang StateKeyLaboratoryyofHeavyOilProcessing UniversityofPetroleumBeijing102249China UniversityofPetroleum DongyingShandong257061China

The interactions between the components of FeCl3-Al (i-Bu)3-bipyridine -catalyst were studied by the electric conductivity of these components in a hydrogenated gasoline medium at 25℃. It was found that Al (i-Bu) existed in an 3 associated state and was then dissociated into ion pairs. The reaction between FeCl3 and Al (i-Bu)3 is the chief reaction in the formation of nano-sized particles. Simultaneously, Al (i-Bu)3 reduced Fe3+ into Fe2+. The reaction between Fe2+ and bipy generated a Fe (bipyridine)2+ complex compound, which prevented Al (i-Bu)3 from reducing Fe2+ to a lower valence (Fe+, Fe0). The excessive Al (i-Bu)3 was dissociated into ion pairs and formed a double layer, which stabilized the nano-sized particles.

关键词： Nano-sized catalyst electric conductivity electric double layer

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Influence of Solvent Conditons on Average Relative Molecular Weight of Polyoctadecyl Acrylate

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Petroleum Science 2005年第1期2卷 90-92页

作者： JiangQingzhe songzhaozheng KeMing ZhaoMifu StateKeyLaboratoryofHeavyOilProcessing UniversityofPetroleumBeijing102249China Dongxin ShengliPetroleumAdministizativeBureauShandong257001China

Polymerization of octodecyl acrylate is studied in four solvents — carbon tetrachloride, chloroform, methylbenzene and tetrachloroethane. Experimental results indicate that the sequence of chain transfer constants in solvents is: carbon tetrachloride>chloroform>methylbenzene>tetrachloroethane in the polymerization of octadecyl acrylate. Influences of four solvents on solubility of polyoctadecyl acrylate prove not the same. In chloroform, polyoctadecyl acrylate shows the highest relative viscosity and the lowest chain termination rate constant. In higher conversion, the average relative molecular weight of polyoctadecyl acrylate depends mainly on the chain transfer constant of the solvent. Under the circumstance of monomer conversion higher than 30%, the viscosity effect induced by polymeric molecular shape in the solvents have a strong influence on the relative molecular weight of the polymer obtained.

关键词： Polyoctadecyl acrylate solution polymerization chain transfer

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Isomerization of n-octane on NiW/HSAPO-11 Catalyst

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Petroleum Science 2005年第1期2卷 27-31页

作者： KeMing ChenYanguang songzhaozheng JiangQingzhe StateKeyLaboratoryofHeavyOilProcessing UniversityofPetroleumBeijing102249China

The catalyst NiW/HSAPO-11 was prepared by impregnating Ni and W onto HSAPO-11 zeolite with two different methods. The isomerization and aromatization properties were investigated with an microreactor using n-octane as a feedstock. NiW/HSAPO-11 shows a high hydroconversion activity of n-octane, and the optimum operating parameters for the catalyst to produce high octane number products were: 400℃, 2.0MPa, VH2:Vn-octane= 400:1, liquid hourly space velocity LHSV=1.0h-1. Under the optimum reaction condition, the conversion efficiency, C5 liquid + product selectivity, isomerization and aromatization product selectivity were 69.80%, 56.95%, 79.73% and 1.29% respectively. The catalyst (S1) impregnated with Ni and W after the HSAPO-11 zeolite was combined with Al2O3 matrix, performed better than the catalyst (S2) impregnated with Ni and W before combining with the Al2O3 matrix.

关键词： n-octane isomerization aromatization HSAPO-11 nickel and tungsten

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