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李钢, Li Gang a, Guo Xinwen a, *, Wang Xiangsheng a, Zhao Qi b, Bao Xinhe b, Han Xiuwen b, Lin Liwu b
Applied Catalysis A: General 185 (1999) 11-18,-0001,():
-1年11月30日
Titanium silicalites have been synthesized in the TPABr
Titanium silicalite, TS-1, Template effect, Epoxidation, TPABr
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【期刊论文】EFFECT OF SOLVENTS ON PROPENE EPOXIDATION CATALYZED BY TITANIUM SILICALITE
李钢, Gang Li a*, Jiwen Meng a, Xiangsheng Wang a, b and Xinwen Guo a, b
React. Kinet. Catal. Lett. Vol. 82, No.1, 73-80 (2004),-0001,():
-1年11月30日
Titanium silicalite was prepared using tetrapropylammonium bromide as a template. Propene epoxidation was studied on this catalyst using the mixtures of methanol with water or 2-propanol or acetone and the solvent effect was investigated systematically.
Propene, epoxidation, titanium silicalite, solvent effect
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【期刊论文】Effect of sodiumions on propylene epoxidation catalyzed by titanium silicalite
李钢, Gang Li a, *, Xiangsheng Wang a, Haisheng Yan a, Yongying Chen b, Quansheng Su b
Applied Catalysis A: General 218 (2001) 31-38,-0001,():
-1年11月30日
Propylene epoxidation catalyzed by titanium silicalite is easily influenced by acidic or basic impurities. The effect of sodium ions on the reaction was systematically investigated. It has been shown that a proper amount of sodium salt additive can inhibit the further reaction of propylene oxide (PO) with the solvent and can increase the selectivity of PO. But a slightly excessive amount of sodium salt can be a poison to the titanium silicalite catalyst. The sodium salt additive can accumulate on the catalyst in repeated runs of propylene epoxidation in an autoclave, so the catalyst may be poisoned if an equal amount of sodium salt is added in each run. The excessive sodium ions on titanium silicalite can deactivate the catalyst in calcination, while acid treating can restore the activity of titanium silicalite. If the propylene epoxidation is carried out in a fixed bed, the sodium ions on titanium silicalite can gradually come loose and the PO selectivity decreases with time on-stream. A small amount of supplement of sodium salt in the raw material can make the PO selectivity stable for a longer period.
Propylene, Epoxidation, Sodium ion effect, Titanium silicalite, TS-1
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李钢, 王祥生, , 金长子, 李桂民
催化学报,2004,25(4):315~318,-0001,():
-1年11月30日
以十二胺(DDA)为模板剂,采用室温晶化合成了钛硅中孔分子筛Ti2HMS,并用XRD,IR,UV2Vis和N2吸附对分子筛 样品进行了表征,考察了配料硅/钛比、模板剂用量及晶化时间对合成分子筛的影响,结果表明,Ti2HMS分子筛具有大的比表面,孔径约为3nm。随着配料硅/钛比的降低,Ti2HMS分子筛的比表面积减小,进入骨架的钛量增多,且非骨架钛也增多。n(DDA)/n(SiO2)≤0122时,随着模板剂用量的减少,Ti2HMS分子筛的结晶度下降,骨架钛含量减少,非骨架钛含量增加。晶化时间在9~18h最佳。
钛硅分子筛, Ti2HMS分子筛, 合成, 表征, 十二胺
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【期刊论文】Epoxidation of propylene using supported titanium silicalite catalysts
李钢, Gang Li*, Xiangsheng Wang, Haisheng Yan, Yihui Liu, Xuewu Liu
Applied Catalysis A: General 236 (2002) 1-7,-0001,():
-1年11月30日
The propylene epoxidation using supported titanium silicalite TS-1 catalyst was systematically investigated in a fixed bed reactor. Different supports such as SiO2 and Al2O3 were used and two molding methods were adopted to prepare the catalyst. Strip TS-1 catalyst of 1mm
Propylene, Epoxidation, Titanium silicalite, TS-1, Supported catalyst
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