SYNTHESIS OF DIALKYL TETRABROMOPHTHALATES BY PTC AND THEIR FLAME RETARDANCY

Eight dialkyl tetrabromophthalates (DATBPs) were synthesized by reacting tetrabromophthalic anhydride with excess alcohols which were used not only as a reactant but also as a solvent and using a quaternary ammonium salt as a phase transfer catalyst (PTC). The yields were found to be between 85-93%. Their structures were characterized by IR, NMR and elementary analysis. The flame retardant properties of the compounds were also studied.

Investigation on the active phase of CoMo catalyst for selective HDS by low temperature in situ FT-IR

有不同金属装载的 CoMo/Al2O3 催化剂被低温度作为看起来是由产生为 unpromoted 特定、支持的信号的一个强大的方法的探查分子用公司在 situ 英尺红外学习瞬间地点。结果表明催化剂表面上的 CoMoS 阶段的增加改进 HDS 活动和选择。CoMoS 和 MoS2 的活跃地点数字的比率与 HDS 选择线性地相关，它为开发工业选择 HDS 催化剂提供一个有效工具。