沙河市鲁北公司20kt／a硫酸装置技术改造

采用ＬＳＢ浓酸泵、管式分酸器、阳极保护管式换热器和板式换热器等新设备，对硫酸装置进行了技术改造。技改后，产量从７２ｔ／ｄ提高到９３．５ｔ／ｄ，电耗由１２３ｋＷ·ｈ／ｔ降低到１１４ｋＷ·ｈ／ｔ，开车率由９２．５％提高到９７．０％。     

钨系齐格勒－纳塔催化剂引发丁二烯－苯乙烯共聚合──Ⅰ．高乙烯基丁苯共聚物的合成

以ＷＣｌ_６（Ｗ）为催化剂，分别与四种烷基铝组成催化体系，以苯乙烯（Ｓｔ）、丁二烯（Ｂｄ）为单体，在６０～７０℃下聚合５ｈ，可获得高乙烯基丁苯共聚物。结果表明，以Ｗ－Ａｌ（ｉ－Ｂｕ）_２Ｃｌ（Ａｌ）组成的催化体系，在Ａｌ／Ｗ＝３．５（摩尔比），陈化３０ｍｉｍ以上时，活性最高，所得丁苯共聚物［η］＝０．２５～０．６５ｄＬ／ｇ，乙烯基含量大于５０％（摩尔），结合Ｓｔ含量为１０％～４０％（摩尔）。     

苏·阿防治花椰菜小菜蛾的效果

比较了苏·阿、Ｂ．ｔ．和虫螨克防治花椰菜小菜蛾的效果。药后１天,２％苏·阿可湿性粉 剂１００ｇ／６６７ｍ２的防效为９８．３％,高于Ｂ．ｔ．可湿性粉剂（１６０００ＩＵ／ｍｇ）５０ｇ／６６７ｍ２９５．９％的防效, 也高于０．９ ％虫螨克乳油 ５０ｍｌ／６６７ｍ２９５．４ ％的防效。药后１周,苏·阿的防效仍达 ９４．７７％,明显 高于Ｂ．ｔ．可湿性粉剂（１６０００ＩＵ／ｍｇ）５０ｇ／６６７ｍ２和０．９％虫螨克乳油５０ｍｌ／６６７ｍ２的防效。     

WCl6—Al（i—Bu）2Cl催化丁二烯—苯乙烯共聚合：丁苯共聚物的结构组…

对丁苯共聚物的＾１Ｈ－ＮＭＲ谱图进行了归属，并建立了计算其４种结构单元含量的方程式。当Ａｌ（ｉ－Ｂｕ）２Ｃｌ／ＷＣｌ６＝６（摩尔比）时，苯乙烯单元含量最低，丁二烯单元含量最高；Ｂｄ单元含量随Ｂｄ／Ｓｔ值的增加而提高，总的Ｓｔ单元含量随Ｂｄ／Ｓｔ值的增加而降低；聚合时间对单元含量的影响与Ｂｄ／Ｓｔ值的影响相似；提高聚合温度，Ｓｔ单元含量降低。用微分法求得转化率低于１０％时Ｓｔ的竞聚率为４．７０，Ｂｄ     

厌氧流化床处理硫酸盐草浆废水的研究

本文研究了ＡＦＢ反应器在中温（３０±２）℃条件下处理硫酸盐草浆废水的性能，其达到的指标为：当进水ＣＯＤ浓度２０００～５０００ｍｇ／Ｌ，水力停留时间３～９ｈ，ＣＯＤ去除率为５０．１％～７０．２％，容积产气率１．４６～２．０ｍ３／ｍ３·ｄ，有机容积负荷达４３．２ｋｇＣＯＤ／ｍ３·ｄ；并初步研究了废水中ＳＯ２－４、Ｓ２－等物质对厌氧生物的抑制作用，提出了消除其影响的方法。     

单元复合多管式除尘技术评述

单元复合多管式除尘技术评述白元焕，王龙宝鸡发电厂１概况宝鸡发电厂是６０年代初投产发电的老厂，总装机容量为１５０ＭＷ，四台锅炉均系捷克制造的单室液态排渣炉。额定出力为６３０ｔ／ｈ（１１５ｔ／ｈ×２＋２００ｔ／ｈ×Ｚ），锅炉原配大旋风（６３０）多管式除尘...     

石化废水处理站废气处理设计

介绍了石化废水处理站废气处理工艺：废气通过洗涤塔及生化过滤可以去掉其中９５％以上的有机物,生化过滤装置废气处理面积负荷为３０～５０ｍ３／（ｍ２·ｈ）。废气处理体积负荷为２５～５０ｍ３／（ｍ３·ｈ）。     

WCl_6－Al（i－Bu）_2Cl催化丁二烯－苯乙烯共聚合──丁苯共聚物的结构组成和竞聚率测定

对丁苯共聚物的~１Ｈ－ＮＭＲ谱图进行了归属，并建立了计算其４种结构单元含量的方程式。当Ａｌ（ｉ－Ｂｕ）_２Ｃｌ／ＷＣｌ_６＝６（摩尔比）时，苯乙烯（Ｓｔ）单元含量最低，丁二烯（Ｂｄ）单元含量最高；Ｂｄ单元含量随Ｂｄ／Ｓｔ值的增加而提高，总的Ｓｔ单元含量随Ｂｄ／Ｓｔ值的增加而降低；聚合时间对单元含量的影响与Ｂｄ／Ｓｔ值的影响相似；提高聚合温度，Ｓｔ单元含量降低。用微分法求得转化率低于１０时Ｓｔ的竞聚率为４．７０，Ｂｄ的竞聚率为０．２７。     

预分解窑改燃无烟煤的调试（一）

１概述我厂＃３窑是经改造的预分解窑系统,设计生产能力１３２０ｔ／ｄ,实际能力可达１４５０ｔ／ｄ。其窑尾四级预热器规格分别为：Ｃ１：２－３７００Ｃ２～Ｃ４５４５０ｍｍ。分解炉属离线型喷腾管道式分解炉,规格３８４０ｍｍ×１９９４０ｍｍ。出Ｃ１筒３６０℃±１０℃的废气全部入增湿塔处理至１３０℃±１０℃后入电除尘器除尘。增湿塔规格７０００ｍｍ×２６０００ｍｍ,处理风量２７００００ｍ３／ｈ,１３把喷枪,喷水量１４．５ｔ／ｈ～１５ｔ／ｈ。窑尾高温风机型号Ｗ６－２×３９№１８,风量２７００００ｍ３／ｈ,压力７…     

RAR50选粉机下料口的改进措施

我公司４０００ｔ／ｄ熟料新型干法生产线 ,原料粉磨系统选用了丹麦ＦＬＳ公司的ＡＴＯ×５０立磨（设计产量３９０ｔ／ｈ）配套ＲＡＲ选粉机。试生产时 ,该磨机产量仅有３２０ｔ／ｈ ,为设计指标的８２ %。经分析确认是ＲＡＲ５０选粉机下料口设计存在缺陷所致。为此多次对下料口作了改进 ,消除了这一影响因素。现作一介绍 ,供参考。１ＲＡＲ５０选粉机下料口存在的问题ＡＴＯ×５０立磨与ＡＴＯ×３７．５立磨在结构设计上有所不同。ＡＴＯ×３７．５立磨内喷环风速设计为７５ｍ／ｓ～８０ｍ／ｓ ,只有少量物料外循环 ,物料的分选主要是在…     

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.     

Novel polyurethane coating technology through glycidyl carbamate chemistry

Glycidyl carbamate chemistry combines the excellent properties of polyurethanes with the crosslinking chemistry of epoxy resins. Glycidyl carbamate functional oligomers were synthesized by the reaction of polyfunctional isocyanate oligomers and glycidol. The oligomers were formulated into coatings with several amine functional crosslinkers at varying stoichiometric ratios and cured at different temperatures. Properties such as solvent resistance, hardness, and impact resistance were dependent on the composition and cure conditions. Most coatings had an excellent combination of properties. Studies were carried out to determine the kinetics of the curing reaction of the glycidyl carbamate functional oligomers with multifunctional and model amines. Detailed kinetic analysis of the curing reactions was also undertaken. The results indicated that the glycidyl carbamate functional group is more reactive than a glycidyl ether group. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, on October 27–29, 2004, in Chicago, IL.     

Highly moisture-proof polysilsesquioxane coating prepared via facile sol-gel process

A highly moisture-proof polysilsesquioxane coating was obtained from a new bis-silylated precursor, which was synthesized from 3-aminopropyltriethoxysilane (APTES) and m-xylylene diisocyanate (m-XDI) in tetrahydrofuran (THF) and verified by ¹H MAS NMR. For direct comparison purposes, an SiO₂ coating was also prepared by the Stöber method using tetraethoxysilane (TEOS) as the reactant. Interestingly, the coating obtained from the polysilsesquioxane sol exhibited a much higher moisture resistance capability than its counterpart, which was attributed to its more compact feature between nanoparticles as characterized by N₂ absorption experiment and transmission electron microscopy (TEM). Furthermore, its high transparency of about 92% showed potential for application in the protection of optical crystals.