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。     

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％。     

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。     

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。     

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%     

甲硫基乙醛肟的合成工艺研究

本文研究了以乙醛肟为原料合成甲硫基乙醛肟的工艺。对各种因素对产品收率的影响进行了试验，找出了最佳工艺条件。经过工业性试验，证明本工艺安全可靠，收率稳定，产品质量好，经济效益高。     

乙醛肟合成技术进展及综合市场分析

乙醛肟是除氧效果优良的新型除氧剂，也是一种重要的有机合成和分析试剂。在农药行业乙醛肟可以制成甲硫基乙醛肟，进一步可合成农药灭多威和硫双威。灭多威是使用最广泛的杀虫剂品种之一，其用量居世界杀虫剂品种前十位，近年其使用量有快速增长的趋势。硫双威又名硫双灭多威，是灭多威低毒化产品。综述了乙醛肟的各种生产路线，其中重点介绍硫酸羟胺法的工艺进展。同时对乙醛肟的国内生产现状、市场需求及发展趋势做了分析，并对我国乙醛肟的生产和发展提出了建议。     

羟胺及烷氧基胺盐酸盐绿色生产工艺探索及实践

对羟胺及烷氧基胺盐酸盐生产工艺进行了分析比较,提出了一条酮氨氧化制备酮肟一酮肟醚化一水解制备烷氧基胺盐酸盐及回用酮这样一条绿色生产工艺路线。此工艺操作条件温和,原子经济性高,收率好。以丙酮、氯甲烷为主要原料制备甲氧基胺盐酸盐,总收率可达84．6％,原子经济性达48．O％。     

邻甲基苯乙酮的合成

以邻甲基苯胺为原料，经重氮化、偶合、水解及粗品精制工艺合成邻甲基苯乙酮，收率73％，纯度98％。提出了利用邻甲苯胺重氮盐与乙醛肟合成邻甲苯乙酮单一化合物的可供工业化应用参考的方法。     

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%。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。