二甲胺乙基膦酸钡新型固体碱催化剂的研究

首次用二甲胺乙基膦酸与氯化钡在碱性溶液中制得二甲脘乙基膦酸钡载体，用５％ＮａＯＨ溶液处理该载体，制得相应的固体碱，并用元素分析，ＩＲ、ＴＧ、ＤＴＡ、ＤＴＧ对其进行了表征，用指示剂法，测得固体碱碱强度（Ｈ－）为９．３～１５．０；采用苯甲酸滴定法，测定了载体２和固体碱３在水中的游离碱量；讨论了载体制备中，驾流时间对载体２和固体碱３在水中游离碱量的影响。将固体碱用于催化Ｋｏｎｅｖｅｎａｇｅｌ缩合反应，产

Studies on a New Type of Solid Base Barium Dimethyl Aminoethyl Phosphonate

Barium dimethyl aminoethyl phosphonate was synthesized for the first time by using barium chloride reacted with dimethyl aminoethyl phosphonic acid in basic aqueous solution and was used as support to prepare solid bases by treating the support with 5% sodium hydroxide solution. The supports and solid bases were characterized by elemental analysis, IR, TG, DTA, DTG, basic strength and free base number in water. The basic strengths of the solid bases were about 9.3 to 15.0 by indicator method. The free base numbers in water of the supports and the solid bases were measured using benzoic acid titration. The effect of refluxing time in the preparation of the support on the free base numbers in water is discussed. The condensation reaction between benzaldehyde and ethyl malonate catalyzed by the solid base was carried out with the merits of high yield, easiness in operation, simple post treatment, and no waste acidic and basic liquor to drain off during the reaction. The solid base catalyst can be reused for 8 times and can be regenerated easily. It is a type of environmently friendly catalysts.