甲硫基乙醛肟的合成进展

评述了甲硫基乙醛肟的主要合成方法和工艺,分别从乙醛的肟化和乙醛肟的氯化两个过程介绍乙醛法合成甲硫基乙醛肟的研究和进展。分子筛催化乙醛肟化的乙醛肟收率90%以上;在适宜的氯化条件下,甲硫基乙醛肟的收率95%左右。     

共沸萃取法制取纯乙醛肟

介绍了通过所选用的溶剂，利用共沸萃取原理，制取纯乙醛肟的工艺过程，所得乙醛肟纯度到９８％以上，收率达到９０％，解决了乙醛肟提取过程含量低，收率低的问题。     

亚硝酸钠法合成乙醛肟新工艺研究

介绍以亚硝酸钠为主要原料合成农药中间体乙醛肟的工艺路线,对影响收率及产品质量的主要因素进行了系统研究,确定了最佳的工艺路线的操作参数,该工艺肟化收率在９０％以上,产品中乙醛肟含量大于３５％,相对纯度高于９５％。     

气相萃取法制备无水乙醛肟

研究了以二氯甲烷为萃取剂 ,利用气相萃取由乙醛肟水溶液制备无水乙醛肟的工艺过程 ,所得乙醛肟贮存稳定性好 ,含量在 99%以上 ,收率达 93%     

汽相萃取法制备无水乙醛肟

研究以二氯甲烷为萃取剂,利用汽相萃取由乙醛肟水溶液制备无水乙醛肟的工艺过程,所得乙醛肟贮存稳定性好,含量在９９％以上,收率达９３％。     

乙醛肟合成方法的改进

改进了乙醛肟的合成工艺。以盐酸羟胺为原料,滴加乙醛,反应1h后,调节pH值,然后加入自制强酸弱碱盐进行中和,将反应产物蒸馏得到乙醛肟。当盐酸羟胺和乙醛的摩尔比为1∶1 05～1 07、盐酸羟胺和水质量比为1∶1～1∶1 2、反应温度控制在10±2℃、反应体系的pH值控制在6～6 5时,乙醛肟的收率和纯度分别为94 1%和96 2%。     

农药中间体乙醛肟合成新工艺研究

本文介绍了亚硝酸钠为主要原料合成乙醛肟的工艺路线，对影响合成收率及产品纯度的有关因素进行了较系统研究，确定了最佳合成路线及操作参数，为其工业化生产提供了依据。     

灭多威肟的合成研究

以水为溶剂,乙醛肟为原料,经氯化、取代反应得到灭多威肟,优化条件下,总收率达80.2%,产品纯度≥98%(HPLC)。工艺具有成本低、反应速度快和环境友好等特点。     

无水乙醛肟的制备

乙醇肟是生产农药灭多威的中间体,也是重要的有机合成试剂和分析试剂[1]。用于有机合成的乙醛后有时必须要求无水（如：与酰氯和异氰酸酯的反应）,而目前国内市场提供的乙醇肟为含量40％左右的水溶液,不能满足需要,为此,我们对无水乙醛股的制备做了研究。无水乙醛肟可由相应乙醛肟水溶液制备。乙醛肟水溶液由盐酸羟胺或硫酸羟胺与乙醛反应而得。本文用盐酸羟胺和乙醛反应所得已醛肟水溶液经萃取、分离、蒸馏制备无水乙酸肟,取得了较好的结果。1实验部分1.1试剂与仪器．乙醛为分析纯;盐酸羟胺、氢氧化钢和二氯甲烷均为化学纯。CR－3…     

硝基乙醛肟及其盐的合成与表征

以硝基甲烷为原料,在强碱溶液中反应得到硝基乙醛肟钠盐,再酸化得到硝基乙醛肟,收率75.5%,并采用红外光谱、核磁共振光谱、元素分析进行了结构表征;分析了反应历程,优化了反应条件,确定适宜反应条件为:n(CH3NO2)∶n(NaOH)为0.6∶1,反应时间20 min,反应温度50℃,溶液pH 1.5。利用硝基乙醛肟的酸性,设计并合成两种硝基乙醛肟衍生物。     

烷基酚类内分泌干扰物污染现状及去除研究进展

内分泌干扰化学物质是环境科学领域研究的热点之一,已报道的内分泌干扰化学物质达100种左右,烷基酚类物质是一类重要的内分泌干扰物,具有雌性激素效应,广泛地分布于环境当中。笔者重点分析了烷基酚类物质在国内外天然水体,自来水,再生水以及生活污水的污染现状,综述了该类物质的主要去除方法,并探讨了该领域进一步研究重点与方向。     

The Structure and Catalytic Properties of Palladium-Silver and Palladium-Gold Alloys

The great differences between the catalytic activities of the Group VIII and the Group IB metals have attracted much attention, especially over the last 25 years, and explanations of these differences have been sought through studying the manner of activity variation in alloys formed between suitable pairs of metals. Selection of suitable alloy systems has presented difficulties. Most work has naturally been done on systems exhibiting a continuous range of solid solution, and hence Pt-Au and Pt-Ag alloys, both of which have miscibility gaps, have not been widely studied. Much work has been done on Ni-Cu alloys, but recent results have demonstrated the presence of phase separation in this system, and this has called into question the interpretation of the earlier work. The Pd-Ag and Pd-Au systems appear to have complete miscibility, and have consequently been much studied: it is to them that this review is directed.     

The Structure and Catalytic Properties of Palladium-Silver and Palladium-Gold Alloys

The great differences between the catalytic activities of the Group VIII and the Group IB metals have attracted much attention, especially over the last 25 years, and explanations of these differences have been sought through studying the manner of activity variation in alloys formed between suitable pairs of metals. Selection of suitable alloy systems has presented difficulties. Most work has naturally been done on systems exhibiting a continuous range of solid solution, and hence Pt-Au and Pt-Ag alloys, both of which have miscibility gaps, have not been widely studied. Much work has been done on Ni-Cu alloys, but recent results have demonstrated the presence of phase separation in this system, and this has called into question the interpretation of the earlier work. The Pd-Ag and Pd-Au systems appear to have complete miscibility, and have consequently been much studied: it is to them that this review is directed.     

Dyeing studies with hydroxyanthraquinones extracted from Indian madder. Part 2: Dyeing of nylon and polyester with nordamncanthal†

Nordamncanthal is an important constituent of the colouring matter extracted from Indian madder roots. Its dyeing properties have never been studied even though the structural characteristics closely resemble those of disperse dyes. In this study, nylon and polyester have been dyed with this colorant. Linear isotherms have been obtained, confirming that the mechanism is similar to that of disperse dyes. The dye has good affinity for both the fibres. Kinetic and thermodynamic parameters have been calculated.     

合理选用模具材料 提高塑料模具的使用寿命

本文简要介绍了塑料模具的工作条件及其失效因素和模具钢的基本要求，并在此基础上详细阐述了常用塑料模具材料；最后，展望了我国塑料模具材料的发展。     

氯化低分子聚乙烯的应用研究

本文叙述了氯化聚乙烯的国内外发展概况。研究了低分子聚乙烯的氯化工艺路线与生产方法，测定了熔融本体氯化方法生产的氯化低分子聚乙烯性能。探讨了ＣＬＰＥ在高分子材料加工，纺织上浆等各个方面的应用。     

电子塑封料的研制与开发——线性热塑性酚醛环氧树脂的研制与应用

研制了电子塑封料用线性高邻位热塑性酚醛环氧树脂，对影响反应的各种因素进行了探索，得到了制备线性塑塑性酚醛环氧树脂的最佳工艺条件。研制出了较为适用的塑封料配方，塑封料所用全部原料均 为国产料；利用自行研制的电子塑封料对半导体元器件进行了封装实验，结果显示塑封效果良好，完全可以替代进口塑封料。均苯四甲酸四（２－乙基己基）酯作为增韧剂用于塑封料属国内首例。     

Production of Fast Dyeings on Resin-treated Wool

The dyeing properties of wool treated with Hercosett 57 resin to render it machine-washable have been studied. It has been shown that this reactive highly basic resin can greatly improve the dyeability of wool. Reactive dyes have excellent properties on this wool. Differential-dyeing and fully continuous dyeing processes, using the special properties of Hercosett-treated wool, have been studied.     

陶瓷釉浆的触变性及其调控措施

本文简要说明了对釉浆触变性进行调节和控制的重要意义，详细分析了导致釉浆触变性过大的原因，通过试验明确了解决釉浆触变性过大问题可采取的具体措施。     

EFFECT OF DISSOLVED SODIUM CHLORIDE SALT ON THE LIQUID-LIQUID EQUILIBRIA OF THE TERNARY SYSTEM ISOPROPYL ETHER-ACETIC ACID-WATER

The effect of the addition of the salt sodium chloride on the liquid-liquid equilibrium data of the ternary system isopropyl ether-acetic acid-water has been experimentally investigated at 30°C. Both the solubility (bimodal) curve and the tie-line have been determined for three salt concentrations. The addition of sodium chloride salt enhances the distribution of acetic acid in ether layer. The tie-line data have been correlated by Othmer and Tobias and Hand plots. The ternary solubility and tie-line data at 30°C for this system in the absence of salt have also been experimentally obtained in this work.