聚氯乙烯树脂节能型立式旋风干燥技术

介绍了新型节能型立式旋风干燥技术的特点、工艺原理及工艺过程。该设备结构创新、工艺先进。采用该技术比旋风干燥工艺可节电15％、节汽25％,提高了PVC产品质量。     

含铜磁黄铁矿的选矿研究

在对江西某含铜磁黄铁矿的选矿研究中采用了全浮和磁－浮两种工艺。全浮工艺获得硫精矿品位３５．５６％，收率９０．０８％，铜精矿品位１７．８５％、收率７２．８４％。磁－浮联合工艺获得硫精矿品位３４．２％、收率９４．５％，铜精矿品位１８．９８％、收率５６．１０％。全浮用药量较磁一浮工艺高，但耗水量小。全浮工艺的铜回收率较高。两种工艺均能获得较好的选矿指标。     

紫外线／活性炭／臭氧工艺降解水中腐植酸的研究

臭氧／紫外线／活性炭工艺是将臭氧氧化、紫外线光解及催化氧化、活性炭吸附及催化氧化结合以提高去除效率的一种新工艺。本文研究了该工艺对水体中天然有机污染物的代表物质腐植酸的降解效果及影响因素。通过静态试验，在中性条件下对比了臭氧、臭氧／紫外线、臭氧／活性炭、臭氧／紫外线／活性炭工艺的降解效果，其中臭氧／紫外线／活性炭工艺降解效果最好。臭氧／紫外线／活性炭工艺对腐植酸溶液GOD_cr及uV254的降低率分别为48．90％和53．8％，比单独臭氧化工艺分别高出了25．8％0和19．2％，比臭氧／紫外线工艺分别高出了13．5％和11．7％，比臭氧／活性炭工艺分别高出了12．5％和10．1％。PH值越高，臭氧通入越多，氧化反应速率越高，去除率也越高。最后，对臭氧、紫外线、活性炭三者协同作用的机理做了探讨。     

茶叶茶多酚、咖啡碱提取及超滤-吸附综合分离纯化过程研究

介绍了采用三级错流提取茶叶有效成分茶多酚、咖啡碱的优化提取工艺。该工艺提取率高达９０％ 以上,其提取液经醋酸纤维素复合钛微孔体超滤膜初步纯化,可得到茶多酚含量大于４０％ 的部标三级品。并建立了茶叶水提取液超滤过程修正凝胶极化模型。超滤透过液经聚酰胺树脂吸附、８５％ 乙醇洗脱,得到茶多酚含量大于９０％ ,咖啡碱含量低于４％ 的部标茶多酚一级品。该工艺具有不另外添加物质、不使用有毒溶剂、工艺简单等特点。     

煤液化残渣与神华煤制备气化水煤浆的试验研究

以液化残渣和神华煤为原料,采用常规制浆工艺和分级研磨制浆工艺进行了成浆性研究,并进行了配煤制浆试验.结果表明:液化残渣和神华煤在常规制浆工艺下的最高成浆质量分数分别为76.49％、62.38％.采用分级研磨制浆工艺,液化残渣和神华煤的最高成浆质量分数分别为79.58％、65.50％,较常规制浆工艺相比提高3个百分点.对...     

45%隔膜碱一次性浓缩为73%片碱的国产升膜技术探讨

介绍了国内73％碱生产现状和升膜工艺情况，对以45％隔膜碱生产73％片碱的升膜蒸发工艺开发设计进行了探讨。提出了生产73％碱的大规模国产化设备、工艺的设计要点。     

低温下改良型ICEAS工艺处理生活污水

采用改良型ICEAS工艺进行低温污水处理,考察了低温条件下改良型ICEAS工艺去除有机物及脱氮除磷的效果。实验结果表明：在温度为5～13℃时,改良型ICEAS工艺对生活污水中的有机物、氨氮、总氮及总磷的平均去除率分别达到87％、64％、60％和78％,较常温下的去除率分别降低了4％、20％、28％和4％。低温时活性污泥中微生物种群有所减少,但污泥沉降性能良好,因此改良型ICEAS有利于防止污泥膨胀。     

菱锰矿制备硫酸锰的工艺研究

介绍了以菱锰矿为原料,用硫酸浸出法制备硫酸锰的工艺路线。详细讨论了各种因素对锰浸出率及产品质量的影响,进而对老工艺进行了改进,优化出最佳工艺条件。试验结果表明：锰浸出率为９８．２％;抽滤回收率为９１．３％;浓缩、烘干及粉碎收率为９６．５％;产品总收率为８６．５％,产品质量符合国家标准     

鸡公湾铜硫铁矿石选矿工艺研究

为了提高铜、硫、铁精矿的质量,对原选矿流程中的磨矿细度、选矿工艺等进行了研究,证明以分支串流混合浮选+磁选+脱硫的选矿工艺较为理想,获得了铜精矿品位13.64％、回收率78.02％,硫精矿品位45.89％、回收率86.65％,铁精矿品位63.27％、回收率75.09％、含硫0.29％的好指标。     

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％。     

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.     

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。     

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.