伯胺N1923络合萃取苯酚

以伯胺N1923与磺化煤油、石油醚、甲苯或正辛醇为稀释剂组成络合萃取剂,在25℃下对苯酚模拟废水进行萃取. 结果表明,40%(j) N1923的甲苯溶液萃取苯酚效果最好. 平衡水相pH<8.3时对萃取影响不明显,苯酚以分子形式被伯胺N1923萃取,H+不参与络合反应;无机盐的盐析效应对苯酚萃取影响较大,顺序为(NH4)2SO4>NaCl>NH4Cl. 伯胺N1923与苯酚主要生成1:1型萃合物;该萃取过程放热,升高温度不利于萃取. 反萃后的有机相萃取效果逐渐下降,可能是伯胺溶解造成的. 40%(j) N1923的甲苯溶液错流萃取煤气化废水,挥发酚的一级萃取率超过99.0%,三级错流萃取结果(0.53 mg/L)接近国家污水综合排放标准(0.5 mg/L).     

硫酸体系中N235萃取铼的热力学研究

以萃取剂N235,稀释剂正庚烷,研究萃取铼的热力学。在N235+(NH4)ReO4+n-C7H16+H2SO4+H2O体系中,温度278.15—298.15 K和离子强度0.1—2.0 mol/kg范围内,以(NH4)2SO4为支持电解质,在H2SO4体系中测定了萃取平衡水相中ReO4-质量摩尔浓度和pH值。计算了萃取反应的标准平衡常数K,并得到经验公式,同时计算了萃取反应的其他热力学量,指出熵和焓都是该萃取过程的推动力。     

伯胺N1923从废SCR催化剂碱浸出液中萃取分离钨的研究

为回收利用废弃选择性催化还原(SCR)催化剂，采用酸化伯胺N1923从钠化焙烧废SCR催化剂的浸出碱液中萃取分离钨(W)，并对萃取参数进行了优化。结果表明，在溶液pH为10、N1923质量分数为10%、水相和有机相的相比为1、时间为4 min和温度为25℃时，W的单级萃取率高达99.28%；溶液中的其他元素P、V和Si的萃取率分别为55.44%、96.70%和55.00%；用硫酸洗涤除去共萃的杂质元素P、V和Si,W的损失可忽略不计，氨水可以从有机相中反萃出96.89%的W得到钨酸铵溶液。利用傅里叶红外光谱仪分析了萃取过程，N1923经H₂SO₄预酸化后转化为伯胺盐(RNH₃⁺)，通过阴离子交换萃取了WO₄^2-。     

粗氯乙烯水洗新流程及泡沫酸洗塔理论塔板数的计算

采用泡沫酸洗塔串循环水洗流程脱除粗氯乙烯中的氯化氢气体,消除了酸性含汞污水对环境的污染,同时使氯乙烯的损失减小到最低限度。针对目前泡沫酸洗塔尚无精确算法的情况,本文提出了对第n块塔板: (T_(n-1)-Tn)CpN_(n-1)+(N_((Hcl)·(n-1))-N_(HCl·n)q_n+(N_(H2)o.n)-TN_(H2)o.n)q_(H2)σ+(T_(n+1)-T_n)(N_(H2)o.n+2.03o(1-W％)/(W％)N_(Hc1))C=O的热平衡——相平衡关系式,采用试差法即可得到泡沫酸洗塔各板上的气液组成和操作温度。     

汽车粉碎残渣中提取金属:不同浸出体系的初步实验结果(英文)

The study is focused on the extraction of valuable metals from automotive shredder residue (ASR) by different leaching solutions. First, ASR samples were roasted at 600 °C to simulate a thermal treatment processing. Distil ed water, citric and sulphuric acid were preliminarily investigated, thus two further full factorial systems entailing H2SO4–H2O2 and H2SO4–H2O2–Fe3+ were tested. The preliminary experimental results showed that 0.1 mol·L?1 H2SO4 solution extracted 100%of Cu, Fe and Zn, whereas citric acid leached 100%of Zn and Pb, 59%of Fe and 62%of Cu;whereas, H2SO4–H2O2 and H2SO4–H2O2–Fe3+(Fenton's) leaching media showed that Cu, Fe and Zn can be extracted simultaneously and completely from the ASR ashes before final disposal.     

N-甲基戊胺的合成

N-甲基戊胺是合成双膦酸盐类药物埃本膦酸钠的重要中间体 ,美国专利合成采用催化氢化法 (收率 49% )。我们以德科尔 -福斯特 ( Decker-Forster)一级胺烷基化法合成 ,方法简便易行 ,收率好。合成路线如下 :CHO +CH3( CH2 ) 4NH2- H2 OCH =N -CH2 ( CH2 ) 3CH3(CH3) 2 SO4C6 H6CH =N+CH3-CH2 ( CH2 ) 3CH3 .CH3SO3- 2 H2 OCHO+CH3OH+CH3( CH2 ) 4N+ H2 CH3· SO3H-2 Na OHCH3( CH2 ) 4NHCH3+Na SO4+2 H2 O　　在 1 L三口瓶中加入 1 0 0 m L无水苯、5 7.8m L( 0 .5 mol)正戊胺和 61 m L( 0 .6mol)苯甲醛 ,加…     

负荷铁有机相的微观结构研究──Ⅰ.伯胺(N_(1923)-正辛烷体系

本文对伯胺（N1923）－正辛烷体系负荷铁后进行冷冻蚀刻技术处理.利用透射电子显微镜对萃取前后有机相结构进行观察分析，结合电导率的结果，进一步证实了伯胺负荷铁有机相反向胶团的存在.发现了在萃取过程中以连续相和反向胶团对有机相水含量及电导率的影响规律.     

N1923对工业钛液的萃取研究

研究了伯胺萃取剂N1923萃取攀枝花钛业公司硫酸法工艺生产工业级TiOSO4液中的钛离子。试验考察了萃取剂浓度、相比、温度、平衡时间、酸值F等因素对钛的萃取率的影响,并测出了钛的萃取等温线。试验结果表明,伯胺萃取剂N1923在工业钛液中具有良好的萃钛性能和钛铁分离性能,Ti(Ⅳ)的萃取率可达98%以上,而Fe(Ⅱ)基本不被萃取。     

电喷雾质谱法示踪钨回收过程离子的转化路径

将环隙式离心萃取器(ACCs)与电喷雾飞行时间质谱(ESI-TOF-MS)相结合，在线监测了回收过程中的钨萃取行为(宏观)和钨形态的转化路径(微观)，发现宏观萃取反应和微观离子形态转化同时发生并相互补充。伯胺N1923萃取钨在144 s内即可达到萃取平衡，萃取率高达98%以上，同时，酸钨比n(H)/n(W)是一个关键变量，当酸钨比n(H)/n(W)=2.4时，全流程钨回收率超过93%。最后，得到了基于钨形态监测的萃取机理，同时，减少原料液中W1含量，增加W10含量，可有效提高钨回收效率。     

烟气的空气过剩系数算图

<正> 在燃烧中实际使用的空气量与理论需要的空气量之比称为空气过剩系数,以α表示。若燃料的分子式为C_nH_m,则完全燃烧时其化学反应式为:C_nH_m+(n+m/4)O_2=n CO_2+m/2 H2O每一分子燃料C_nH_m 燃烧时需O_2为(n+m/4)分子,这时N_2为:N_2=79/(21)(n+m/4)式中:21为空气中O_2体积%,     

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.