氯化钠-二乙基二硫代氨基甲酸钠-二苯胍体系分离铜（Ⅱ）

文章建立了一种利用二苯胍作共沉淀剂分离痕虽Cu（Ⅱ）的新方法。Cu（Ⅱ）与二乙基二硫代氨基甲酸钠（铜试剂，DDTC）形成不溶于水的棕黄色螯合物被吸附在二苯胍的表面，随二苯聪的抚淀而析出，从而使Cu（Ⅱ）得到富察。结果表明：控制pH=1．0，当周体NaCl用量为1．0g，0．0μmol／L钢试剂溶液用量为1．00mL，1．0×10^-3mol/L二苯弧乙醇溶液用量为0．20mL时，Cu^2＋与钢试剂形成棕黄色的螯合物沉淀，随二苯胍共沉淀析出，实现了Cu^2＋-Al^2＋、Cu^2＋-Zn^2＋,Cu^2＋-Mn^2＋间的液-固定量分离。与传统的有机溶剂萃取浮选分离及泡沫浮选分离栩比，该体系具有不使肘有毒害作用的有机溶剂，设备筒单，分离速度快等优点。     

Antioxidant activity and dietary fibre of Prensal Blanc white grape (Vitis vinifera) by‐products

Stem and pomace of a white grape (Vitis vinifera) variety, Prensal Blanc, were studied for the first time: general composition and dietary fibre components together with the total soluble polyphenol content and antioxidant activity. Both by‐products present high contents of total dietary fibre (TDF), 790 g kg^?1 d.m. (stem) and 716 g kg^?1 d.m. (pomace). Values of the soluble dietary fibres in relation to TDF differed: 5% (stem) and 14.4% (pomace). Similar values of Klason lignin were found: 229 g kg^?1 (stem) and 278 g kg^?1 (pomace), however, the pomace exhibited more than twice the content of the condensed tannins (168 g kg^?1) with regard to the stem (79 g kg^?1). Notable were the high resistant protein contents of both by‐products. Stem and pomace showed appreciable amounts of total soluble polyphenols (87 g kg^?1 against 35 g kg^?1 respectively). The free radical scavenging capacity of the former by‐products was determined using the 2,2‐diphenyl‐1‐picrylhydrazyl radical (DPPH) method, obtaining EC₅₀ values of 0.79 g d.m. g^?1 DPPH (stem) and 1.32 g d.m. g^?1 DPPH (pomace). These data shows that both vinification by‐products from the Prensal Blanc variety are a good source of dietary fibre and have antioxidant properties.     

交流伺服系统在包装机械中的应用

介绍交流伺服系统的种类、水平，选好交流伺服对整机设备的可靠性、稳定性是至为重要的。     

硅钨酸催化合成二苯甲烷二氨基甲酸甲酯

以硅钨酸为催化剂、二乙二醇二甲醚为溶剂,对苯氨基甲酸甲酯(M PC)与甲醛缩合反应制备二苯甲烷二氨基甲酸甲酯(MDC)进行了研究。考察了M PC与甲醛摩尔比、反应温度、反应时间和硅钨酸用量对M PC转化率和MDC收率的影响,得到最佳的反应条件:M PC与甲醛的摩尔比为8∶1,反应温度100℃,反应时间4.5h,硅钨酸与M PC的摩尔比为2.1∶100。在此优化条件下反应,MDC的收率为62.8%。对硅钨酸催化M PC与甲醛缩合反应的历程进行了讨论,硅钨酸既有催化反应物种形成活性中间体的活性质子,又有对活性中间体具有稳定化作用的硅钨酸阴离子,从而具有很高的催化活性。     

研究光刻废水中二苯甲酮的处理方法及降解过程

研究185nmUV对二苯甲酮浓度的降低和TOC(Total Organic Carbon)的去除方法. 用185nm紫外及254nm紫外对光刻废水中二苯甲酮处理效果的对比.同时还研究了废水中二苯甲酮的降解过程及中间产物.     

GT147二苯醚系列快干无溶剂漆的研制与应用

论述以二苯醚为主的快干无溶剂漆的研制过程 ,并与T114 7无溶剂漆的性能及应用工艺进行了比较     

Friedel‐crafts alkylation of diphenyl oxide with 1‐decene over sulfated zirconia as catalyst

Friedel‐Crafts alkylation and acylation reactions, using highly polluting homogeneous Lewis and Bronsted acids, are ubiquitous in a variety of organic process industries. In many cases very high conversions and selectivities can be achieved with aluminum chloride as catalyst and nitrobenzene as a solvent. However, environmental concerns associated with aluminum chloride‐nitrobenzene or BF3‐HF or mineral acids catalysts have encouraged development of solid acids, which not only intensify the rates of reactions but also offer better product selectivity. Amongst these catalysts, sulfated zirconia has gained a considerable importance due to its super‐acidity under certain conditions. The alkylation of diphenyl oxide with 1‐decene was studied over sulfated zirconia catalyst and it leads to industrially important products. The surface reaction between chemisorbed 1‐decene diphenyl oxide from the liquid phase, in the absence of any mass transfer resistance, was found to be the rate determining step with Eley‐Rideal type of mechanism.     

碳酸二苯酯的合成研究进展

主要介绍了碳酸二苯酯的三种合成方法,即光气法,酯交换法和氧化羰基化法,其中对酯交换法和氧化羰基化法进行了详细的阐述,讨论了酯交换法中采用的催化剂,反应过程及装置以及反应中产生的共沸物的分离方法,论述了氧化羰基化法采用的催化剂体系。     

Ho~(3 )对二苯亚砜高氯酸铕配合物发光的影响

合成了高氯酸铕二苯亚砜和不同物质量比的高氯酸 ( )、钬 ( )二苯亚砜异核配合物 (Eux Ho1 - x)(DPSO) 7(Cl O4) 3 。测定了配合物的组成、IR、粉晶荧光激发和发射光谱。荧光光谱表明 :虽然 Ho3 的发射几率较高的 5S2 激发态能级高于 Eu3 ,但并未对 Eu3 的发光产生敏化作用 ,相反当掺入 0 .0 0 2 mol的 Ho3 时即对 Eu3 的发光产生猝灭作用。另外从 Eu3 的荧光光谱知 :5D0 → 7F2 的电偶极跃迁强度大大高于 5D0 → 7F1 的磁偶极跃迁 ,这表明铕 ( )在配合物晶体中处于非对称中心的位置。     

新型耐热绝缘材料的研究

以甲氧基二苯醚和乙酰苯胺为原料,合成一种新型的苯胺二苯醚树酯,并与环氧树脂共聚,研究了共聚机理,考察了材料的耐热性.结果表明,共聚物的热分解温度可达365.25℃,温度指数为187.14℃,可作为耐高温绝缘材料应用于电机电器领域.