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本文采用两步法合成了乙酰丙酮钛。首先合成乙酰丙酮钠,再用乙酰丙酮钠与三氯化钛反应,制备成乙酰丙酮钛.对乙酰丙酮钛的物理性能进行了鉴定,并对乙酰丙酮钛的催化活性做了实验。实验结果表明,乙酰丙酮钛/一氯二乙基铝组成的络合催化体系,对苯乙烯聚合具有一定的催化活性。 相似文献
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简要介绍乙酰丙酮的合成方法,较详细介绍了乙酰丙酮金属络合物的合成方法,并就乙酰丙酮金属络合物的应用开发提出了建议。 相似文献
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以三氧化二钒为钒源,在体系中引入氧化剂和水夹带剂,合成了乙酰丙酮氧钒,实现了乙酰丙氧钒的绿色连续合成。探讨了空气、过氧化氢和氧气三种氧化剂对乙酰丙酮氧钒合成的影响,对产物进行表征并与商业乙酰丙酮氧钒对比。结果表明,引入氧化剂之后,乙酰丙酮氧钒的产率显著提高,三种氧化剂制得的乙酰丙酮氧钒产率均可达到80%以上,其中氧气氧化效果最好,当氧气流量为200 mL/min,回流2 h时,乙酰丙酮氧钒产率可达90%。XRD、FTIR和TG结果显示,本研究合成的乙酰丙酮氧钒纯度较高,与商业乙酰丙酮氧钒可比。 相似文献
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《精细化工原料及中间体》2020,(2)
主要研究乙酰丙酮三苯基膦羰基铑(简称铑派克)催化剂合成工艺路线和工艺条件,以及乙酰丙酮二羰基铑和铑派克的合成过程中反应条件对转化率的影响。本文通过调整乙酰丙酮的量、合成反应的PH值、促凝剂,使得铑派克的单程收率达到93%。 相似文献
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《化学推进剂与高分子材料》2004,2(3):49-50
<正> 环氧乙烷催化水合制乙二醇研究进展.工业催化,2002,10(2):38 乙酰丙酮铁的合成研究.山西化工,2002,22(1):7 壳聚糖-两性聚氨酯接枝共聚物的制备.应用化学,2002,19(4):321 相似文献
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高效液相色谱法测定乙酰丙酮含量 总被引:1,自引:1,他引:0
探索了建立高效液相色谱法测定乙酰丙酮含量。其方法为:采用岛津LC-10AT型高效液相色谱仪,使用Shi madzu VP-ODS(150 mm×4.6 mm,4.6μm)色谱柱,以甲醇(100%)作为流动相,流速0.3 mL/min,检测波长274 nm,柱温30°C。结果为乙酰丙酮进样量在15.62~156.2 ng范围内与峰面积线性关系良好(r=0.999 9);乙酰丙酮平均回收率(n=6)为100.02%;相对标准偏差(RSD)为1.44%。该方法简便、快速、准确、重复性好,可用于乙酰丙酮含量测定。 相似文献
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对酚试剂分光光度法和乙酰丙酮分光光度法两种检测甲醛的方法做了详细的对比。认为酚试剂分光光度法受乙醛、丙醛的存在,对测定结果产生干扰,绘制曲线很难形成线性关系;而乙酰丙酮分光光度法虽然是与室内环境相关的标准,但经过其检测甲醛含量能力的验证,认为操作简便,性能稳定,误差小,不受乙醛干扰,有色溶液可稳定存在12h,与酚试剂分光光度法达到了相同的检测效果。 相似文献
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The dissociation equilibria of tetraalkylammonium and alkali metal salts have been studied by conductometry in acetylacetone as a new electrochemical solvent. The limiting molar conductivities and ion association constants of these 1-1 electrolytes have been calculated by the Shedlovsky method, and the dependence of ion association constants on cation and anion sizes has been discussed in connection with the properties of acetylacetone. In acetylacetone, as well as in acetone, alkali metal ions are not strongly solvated, and alkali metal salts form contact ion-pairs predominantly. On the other hand, the small anions such as chloride and bromide are solvated in this solvent to a considerable extent based on the enol form of the solvent, and the ion-pairs of tetraalkylammonium halides are solvent-separated as in alcohols. 相似文献
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I. A. El-Sakka S. M. El-Kousy Z. E. Kandil 《Advanced Synthesis \u0026amp; Catalysis》1991,333(2):345-350
The reaction of 1 a , b with cyclohexanone afforded hexahydronaphthalene derivatives ( 3 a , b ). In contrast to the behaviour of 1 a , b , cyclohexanone reacts with 4a – c to yield the propenylidenecyclohexanone derivatives ( 5a – c ). The reaction of 1a with acetylacetone gives 4H-pyran 6 and a 1:2-adduct 8 a . On treatment of 8 a with sodium metal in the presence of dioxane, the pyrano [2, 3-b]pyridine ( 9a ) was obtained. When 1 b , c reacted with acetylacetone, the only isolable products were 8 b , c . Reaction of 4a with acetylacetone gives acyclic compound 10 . This on treatment with basic reagents, gives the pyran derivative ( 13 ). 相似文献
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The gelling process in the preparation of tin oxide materials based on tin tetrabutoxide is studied. Sn(OBun)4 modified by two moles of acetylacetone (AcAc) has a stable six-member ring structure and is less susceptive to water. In a system with a lower molar ratio of acetylacetone to Sn(OBun)4 ([AcAc]/[Sn(OBun)4]<2.0) or a larger portion of water ([H2O]/[Sn(OBun)4]>2.5), colloidal suspension or white precipitation will take place. A system with molar ratios of both acetylacetone to Sn(OBun)4 and water to Sn(OBun)4 at 2.0 is transparent and olivaceous sol. As catalysts, hydrofluoric, hydrochloric, hydrobromic and acetic acids, and ammonia all accelerate the hydrolysis and condensation of Sn(OBun)4 during the sol-gel process. Light scattering measurement indicates that cluster size distribution in the sol system undergoes gradual broadening during the sol-gel transition. 相似文献
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