新型过滤、洗涤、干燥“三合一”设备的开发

开发了一种新型"三合一"设备,该设备集过滤、洗涤和干燥功能于一体,其特殊的磁力传动密封结构,最大限度地保证了过滤过程的密封性;洗涤过程中,可进行化浆洗涤和置换洗涤,洗涤效果好;干燥过程中,有效换热面积大,搅拌强度可调,且可在真空条件下进行操作,干燥效率高、操作周期短,特别适合应用于医药、精细化工及有机化工等行业中涉及有毒、有害、易燃、易挥物质的分离过程。     

草甘膦反应过滤一体机的设计

针对草甘膦合成反应和过滤两个主要工艺过程连续生产的需要,开发了一种集搅拌混合、反应、过滤、滤饼吹干、洗涤、鼓泡输送（排滤饼）等步骤一次性在一个密闭空间内完成的设备。提出了该设备的关键实现技术,包括设计技术指标、设备结构设计、工作流程设计、主要技术特征、技术经济指标。该设备具有操作简单、生产效率高、过滤精度高、自动化程度高及环境污染少等特点。     

上海迅昌化工装备技术研究所

<正>各种高效反应、蒸发、结晶、萃取、过滤、洗涤、干燥多功能一体机WFGG-卧式反应过滤干燥多功能机全密闭操作,反应、萃取、蒸发、浓缩、结晶、过滤、洗涤、干燥、混合在一台机内完成。LFGG-筒锥式过滤洗涤干燥机全密闭操作,内加热螺旋搅拌,可在一台机内完成反应萃取过滤洗涤干燥混合等多种操作,成品自动推出。PFD-平板式过滤洗涤干燥机液压升降,平板过滤,特殊搅拌结构,可在一台机内完成过滤、洗涤、干燥、混合、自动出料等多种全密闭操作,一机多用。     

上海迅昌化工装备技术研究所

正WFGG-卧式反应过滤干燥多功能机全密闭操作,反应、萃取、蒸发、浓缩、结晶、过滤、洗涤、干燥、混合在一台机内完成。LFGG-筒锥式过滤洗涤干燥机全密闭操作,内加热螺旋搅拌,可在一台机内完成反应萃取过滤洗涤干燥混合等多种操作,成品自动推出。PFD-平板式过滤洗涤干燥机液压升降,平板过滤,特殊搅拌结构,可在一台机内完成过滤、洗涤、干燥、混合、自动出料等多种全密闭操作,一机多用。     

上海迅昌化工装备技术研究所

<正>WFGG-卧式反应过滤干燥多功能机全密闭操作,反应、萃取、蒸发、浓缩、结晶、过滤、洗涤、干燥、混合在一台机内完成。LFGG-筒锥式过滤洗涤干燥机全密闭操作,内加热螺旋搅拌,可在一台机内完成反应萃取过滤洗涤干燥混合等多种操作,成品自动推出。PFD-平板式过滤洗涤干燥机液压升降,平板过滤,特殊搅拌结构,可在一台机内完成过滤、洗涤、干燥、混合、自动出料等多种全密闭操作,一机多用。     

多功能化工设备的结构设计

本文旨存介绍一种新型的多功能化工设备,该设备集中了静止、搅拌、旋转设备的某些特点,具有过滤、洗涤,干燥、冷却等四种功能。可将若干个化工工艺过程在一台设备内完成,而且操作方便,结构又不太复杂,是一种理想的化工设备。     

酶解液过滤过程的强化及新型水平带式真空过滤机的应用

以生物保健品生产过程中难过滤的酶解液为研究对象,考察了该酶解液的物料特性和过滤特性.对该物料进行了过滤过程的强化研究,筛选了合适的助滤剂,探讨了助滤剂添加量、助滤剂使用方法、操作压力对实际分离过程的影响,确定了酶解液的分离工艺,还结合强化过滤过程研究,研发了一种新型水平带式真空过滤机并将其应用于生产实际,解决了生产中的...     

影响顺酐装置离心机分离效果的因素分析

阐述了阿法拉伐CHPX-517离心机的分离原理和溶剂邻苯二甲酸二丁酯(DBP)的洗涤流程,说明了溶剂洗涤在整个吸收工艺中的重要性。分析了混合罐的混合温度、搅拌速度、剂水比和停留时间4个因素对离心机分离效果的影响,实验结果表明:混合温度62℃、搅拌速度34r/min、剂水比2:1、停留时间100min时离心机分离效果最佳。     

过滤洗涤干燥一体机在危化学品生产中的应用

在现代的危险化学品生产中,过滤洗涤干燥一体机应用十分广泛。过滤洗涤干燥一体机能够实现全过程封闭连续操作,在很大程度上提升危险化学品生产的安全性。但是在实际的操作和应用过程中也有着较多值得引起注意的地方,主要对过滤洗涤干燥一体机在危险化学品生产中的应用展开探讨。     

滤饼的洗涤

<正> 滤并净化度要求的高低对分离设备投资费用和操作费用的影响极大,因此对洗涤过程的精心研究就显得非常重要了。对于穿流洗涤,人们可将此分为渗滤、洗涤、中间洗涤和扩散洗涤。为了降低洗涤液的用量,可以在设备中设置对流洗涤过程,如对净化度有很高要求时也可设置多级再次搅拌滤饼装     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

Sapindaceae,cyanolipids, and bugs

Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA.     

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.     

2008～2009年世界塑料工业进展

收集了2008年7月～2009年6月世界塑料工业的相关资料,介绍了2008～2009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、环氧树脂、不饱和聚酯树脂)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。     

ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究

建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。