3,4-二氢-2(1H)喹啉酮衍生物的合成研究

对3,4-二氢-2(1H)喹啉酮衍生物1,2,3(R= NO2,NH2,OH;R= H,NO2,NH2)的合成进行了研究。以苯胺和3-氯丙酰氯为原料,制得N-苯基-3-氯丙酰胺,然后经环合得到3,4-二氢-2(1H)喹啉酮,再经由硝化、还原、重氮化水解合成了一系列3,4-二氢-2(1H)喹啉酮衍生物:6-硝基-3,4-二氢-2(1H)喹啉酮(1a),6,8-二硝基-3,4-二氢-2(1H)喹啉酮(1b),6-氨基-3,4-二氢-2(1H)喹啉酮(2a),6,8-二氨基-3,4-二氢-2(1H)喹啉酮(2b),6-氨基-8-硝基-3,4-二氢-2(1H)喹啉酮(2c),6-羟基-3,4-二氢-2(1H)喹啉酮(3a)和6-羟基-8-硝基-3,4-二氢-2(1H)喹啉酮(3b),其中化合物(2c)及(3b)为新化合物。单步产率均在86%以上,路线简单,操作简便,反应条件温和。采用MS,1HNMR对产品进行了定性及结构表征。     

提产后循环提升机下部冒灰问题的解决

<正>我公司一线采用CLF150/90辊压机+VX6817型选粉机+M38130球磨机组成水泥联合粉磨系统。2014年6月中旬,开始在配料皮带头部加入助磨剂来提高粉磨系统台时产量。生产P·O42.5R水泥的台时产量由105t/h左右提高到120t/h左右,增产幅度达14%,同时出现循环提升机下部冒灰严重的情况。1问题分析现场灰尘是从入V型选粉机的循环提升机下部     

Kinetic Treatment for copolymerization of styrene or methyl methacrylate with N-phenylmaleimide

Shirota‘s kinetic model and our kinetic model were used to treat the kinetic data of styrene (St) and N-phenylmaleimide (PMI) copolymerization in which chaxge-transfer complex (CTC) was formed. The results obtained by Shirota‘s kinetic model were disagreed with the experiments and the experimental phenomena could not be explained. The kinetic data of all feed fractions can be treated with our kinetic model, and the experimental phenomena can be explained from the propagation constants and reactivity ratios. Our kinetic model is also suitable for the kinetic data of methyl methacrylate (MMA) and PMI copolymerization in which CTC can not be formed.     

发泡剂1-一氟-1,1′-二氯乙烷在偏氯乙烯-丙烯腈-苯乙烯三元共聚树脂颗粒中的引入工艺

采用水相悬浮浸渍法制备可发泡偏氯乙烯(VDC)-丙烯腈(AN)-苯乙烯(St)三元共聚树脂颗粒,研究了体系中1-一氟-1,1′-二氯乙烷(R141b)蒸汽压对R141b分另1在水和树脂中溶解量的影响,并进行了发泡剂加入量的设计。     

悬浮法聚氯乙烯树脂的颗粒特性及其影响因素的研究

悬浮法聚氯乙烯树脂的颗粒特性包括平均粒径、粒径分布与颗粒形态等方面,是树脂的一个重要质量指标,直接影响到凝胶化速度,液态增塑剂、稳定剂的吸收速度,加工速度,加工性能以及残留氯乙烯含量,粉尘等劳动保护条件。 本文系在肖山树脂厂50升试验釜中研     

矿渣掺量对混凝土氯离子结合能力的影响

用等温吸附法测定了混凝土在系列氯化钠(NaCl)溶液中的平衡氯离子(Cl-)浓度,计算了矿渣混凝土对Cl-的总结合能力、物理结合能力和化学结合能力,研究了矿渣掺量对混凝土Cl-结合能力影响的规律.结果表明:在固定水胶比和胶凝材料用量的情况下,随矿渣掺量的增加,混凝土对Cl-的总结合能力和化学结合能力的变化趋势是先升后降;混凝土对Cl-的物理结合能力的影响不大.混凝土具有最大Cl-结合能力时的矿渣掺量(质量分数)为40%.     

邻二甲苯-4-磺酸从猪血粉水解液中沉淀提取L-亮氨酸的工艺

考察了pH值、邻二甲苯–4–磺酸与L–亮氨酸的物质的量比、氯化铵浓度和温度等因素对邻二甲苯–4–磺酸反应沉淀L–亮氨酸的影响。结果表明：邻二甲苯–4–磺酸沉淀L-亮氨酸的适宜pH值为不高于1.5;邻二甲苯–4–磺酸与L-亮氨酸的最适物质的量比为3∶1;溶液中氯化铵浓度增大使L–亮氨酸的沉淀率缓慢下降;温度升高L–亮氨酸的沉淀率迅速降低,反应应于低温下进行,实际生产中可选择在0 ℃。按上述最佳工艺条件从除酸后猪血粉水解液中提取L–亮氨酸,沉淀率达到90.62%,经精制L-亮氨酸产品达到《中华人民共和国药典》(2000年版二部)的标准。     

含纳米二氧化硅粒子的丙烯酯丁酯细乳化

为了调控含纳米SiO₂的丙烯酸丁酯细乳化后液滴的粒径及粒径分布,研究了细乳化体系组成和超声分散条件对细乳化液滴粒径及粒径分布的影响.发现存在使细乳化液滴粒径及粒径分布趋于稳定的临界超声功率和超声时间;随着十二烷基硫酸钠（SDS）乳化剂浓度增加,液滴粒径减小,而十六烷浓度对液滴粒径影响较小;随着BA分散液中纳米SiO₂质量分数和BA分散液/水质量比的增加,液滴平均粒径增大,粒径分布变宽,这是由于纳米SiO₂粒子吸收了部分超声波能量,同时改变了分散相特性所致.当放置或聚合温度在65℃以下时,细乳化液或相应的聚丙烯酸丁酯/纳米SiO₂复合乳胶能稳定分散.     

油酸修饰纳米CaCO3对PP结晶行为和力学性能的影响

Oleic acid (OA)-modified CaCO3 nanoparticles were prepared using surface modification method. Infrared spectroscopy (IR) was used to investigate the structure of the modified CaCO3 nanoparticles, and the result showed that OA attached to the surface of CaCO3 nanoparticles with the ionic bond. Effect of OA concentration on the dispersion stability of CaCO3 in heptane was also studied, and the result indicated that modified CaCO3 nanoparticles dispersed in heptane more stably than unmodified ones. The optimal proportion of OA to CaCO3 was established. The effect of modified CaCO3 nanoparticles on crystallization behavior of polypropylene (PP) was studied by means of DSC. It was found that CaCO3 significantly increased the crystallization temperature, crystal-lization degree and crystallization rate of PP, and the addition of modified CaCO3 nanoparticles can lead to the for-mation of β-crystal PP. Effect of the modified CaCO3 content on mechanical properties of PP/CaCO3 nanocompo-sites was also studied. The results showed that the modified CaCO3 can effectively improve the mechanical proper-ties of PP. In comparison with PP, the impact strength of PP/CaCO3 nanocomposites increased by about 65% and the flexural strength increased by about 20%.     

邻苯二甲酸酐与环氧氯丙烷反应合成聚酯树脂

以四乙基溴化胺为催化剂,1,4-丁二醇为起始剂,邻苯二甲酸酐和环氧氯丙烷为原料合成聚酯树脂,采用傅立叶红外光谱(FT-IR)和核磁共振(1H-NMR)对产物的结构进行表征,并考察了催化剂用量和反应温度对合成聚酯树脂的影响.结果表明,合成聚酯树脂的端基为羟基,且随着温度升高和催化剂用量增加,反应速率增加,合适的反应条件为...