正交实验法研究无水氟化氢装置各工艺参数的影响

某公司20000t·a^-1无水氟化氢装置,采用萤石与硫酸反应生成无水氟化氢的工艺路线,本文对影响装置运行的部分工艺参数进行了分析。利用正交实验,考察了炉头温度、回转反应炉转速、总配比、烟硫比、炉尾温度对无水氟化氢装置运行情况的影响。结果表明,影响无水氟化氢生产装置稳定性的各因素顺序为：烟硫比>总配比>回转反应炉转速>炉尾温度>炉头温度。随着烟硫比、总配比、回转反应炉转速、炉头温度等参数的提高,无水氟化氢装置的稳定性先增强后减弱;随着炉尾温度提高,装置的稳定性逐渐增强,超过320℃后,稳定性的增加程度逐步降低。     

氟硅酸直接制取无水氟化氢工艺

截至2011年年底,贵州瓮福蓝天氟化工股份有限公司无水氟化氢装置实现长周期稳定运行,产出无水氟化氢产品1．5万t,利润超过3000万元。这标志着我国由氟硅酸制取无水氟化氢的技术已经趋于成熟,该装置也成为采用该技术的世界第1套稳定运行的工业化装置。     

氟硅酸直接制取无水氟化氢工艺建成

近日,从贵州瓮福蓝天氟化工股份有限公司传出好消息,2011年该公司无水氟化氢装置实现长周期稳定运行,产出无水氟化氢产品1．5万t,利润超过3000万元。这标志着我国由氟硅酸制取无水氟化氢的技术已经趋于成熟,该装置也成为采用该技术的世界第一套稳定运行的工业化装置。     

济南建成我国最大的氟化氢装置

我国万吨级无水氟化氢装置,最近在济南化工厂建成并投入试生产,这是我国目前最大的氟化氢装置。这项工程是国家科技重点攻关项目,总投资3500万元,引进的万吨级无水氟化氢装置,采用80年代国际先进技术,产品质量高、消耗低,并改善了环境和     

首套氟硅酸制无水氟化氢装置投运

瓮福集团旗下贵州瓮福蓝天氟化工股份有限公司宣布,该公司建设的2万吨／年无水氟化氢装置试车成功,标志着世界首套氟硅酸生产无水氟化氢装置正式投入工业化生产。     

瓮福（集团）公司近况

①2万t无水氟化氢装置试车成功 无水氟化氢装置以瓮福自主技术与国外技术结合,利用磷酸生产中副产品氟硅酸作原料,有效回收氟资源,探索了一条回收氟资源的新途径。     

洛阳矿业集团3万吨无水氟化氢项目一次投料试车成功

<正>洛阳矿业集团嵩县非金属矿产有限公司年产3万吨无水氟化氢项目一期(1.5万吨)装置于2010年5月29日17时28分一次投料试车成功,到目前为止公司的无水氟化氢装置运行稳定,进入正常生产状态。     

浅谈氟化氢粗馏塔的改造

济南三爱富氟化工有限责任公司拥有一套年产万吨的无水氟化氢生产装置。在无水氟化氢生产过程中。氟化氢粗馏塔因受生产工艺条件和设备材质等因素的制约,故障频繁发生,由此造成装置开工率低,产品质量波动和设备频繁更换。解决好这一制约因素不仅可以提高装置连续开车周期和产品质量,而且能较好的降低生产成本,创造良好的环境效益。     

萤石-硫酸法生产氟化氢工艺安全的优化研究

萤石-硫酸法是国内工业生产无水氟化氢的主流工艺，具有工艺成熟、流程简单、生产效率高、矿物资源丰富等优点。然而无水氟化氢生产过程涉及的物料具有强酸性、腐蚀性和高毒性等特点，其生产工艺安全问题备受关注。本文旨在探讨萤石-硫酸法生产无水氟化氢工艺中存在的危险因素，提出优化的工艺安全措施，以期提高无水氟化氢生产工艺的安全性。     

全球首套无水氟化氢装置落户贵州

日前，贵州宏福总公司与瑞士戴维工艺公司在贵州省贵阳市签署合同，共建一套氟硅酸制取无水氟化氢工业装置。该装置年生产能力为2万t，投资规模为2亿元，使用瑞士戴维工艺公司的技术和核心设备，计划于2006年元月开工，建设工期预计18个月，可在2007年7月建成投产。这是全球首套无水氟化氢装置。     

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。