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专利申请范围用烧碱处理有机物的工艺中,所排出的有机废液含有钠成分,将氧化铁混入废液中并在氧化性气氛中于800℃以上进行高温焙烧,在除去有机物的同时,钠成分转换成铁酸钠,加水分解后,再进行烧碱溶液和氧化铁的再生分离。分离产物分别返回系统使用。再生的烧碱溶液至少是其中的一部分按原样放置或稀释后,用含二氧化碳的气体处理,除去沉淀的杂质后,将母液按原样放置或浓缩后,用与上述同样的方法处理含钠有机废液并以此为特征,即是烧碱的回收方法。专利详细说明从含碱有机废液中经铁酸钠回收烧碱,萃取有机物中的有机酸或处理有机物时,由于烧碱的反复使用,导致其中的杂质累积,本发明是关于防止杂质累积的方法。诸如纸浆工业中,由碱浆蒸解工序排出的废液(所谓黑液)及石油工业中由环己烷空气氧化合成环己酮时,副产废液中皆含碱 相似文献
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针对含氯化铁废腐蚀液的高值化利用和无害化排放问题,开展了用湿法冶金方法制取氧化铁系产品的应用研究.考察了中和剂种类、加入速度、反应温度及洗涤水用量对Fe2+氧化、铁黄FeOOH晶型及产品铁黄和铁红纯度的影响.通过扩大实验估算了该工艺压缩空气和洗涤水用量,提出了处理该类含铁废液的原则流程. 相似文献
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采用硝酸浸出黄磷炉渣可制取白炭黑产品,浸出过程中杂质成分氧化钙和铁的浸出分离效果明显影响产品质量。研究了浸出过程中浸出条件对铁、钙分离的影响。实验得到最佳浸出条件:反应温度为100℃、液固质量比为14∶1、硝酸质量分数为20%、反应时间为6 h、搅拌速度为350 r/min。在此最佳工艺条件下,氧化钙浸出率为99.94%,铁浸出率为92.71%,固相白炭黑中的铁含量为450 mg/kg;制得的固相白炭黑二氧化硅质量分数达99.20%,比表面积达252 cm2/g,白度为88.51%。 相似文献
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氮氧化物尾气经液碱溶液吸收后,用硝酸中和至溶液pH值为7,加双氧水将亚硝酸盐氧化为硝酸盐,加热除去铁等微量杂质,浓缩结晶进一步提纯,经分离得到质量达到化学试剂分析纯的硝酸钠。方法用于生产实践,获得满意的结果。 相似文献
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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. 相似文献
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J. R. Aldrich S. P. Carroll W. R. Lusby M. J. Thompson J. P. Kochansky R. M. Waters 《Journal of chemical ecology》1990,16(1):199-210
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. 相似文献
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M. S. J. Simmonds W. M. Blaney F. Delle Monache M. Marquina Mac-Quhae G. B. Marini Bettolo 《Journal of chemical ecology》1985,11(12):1593-1599
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. 相似文献
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2008~2009年世界塑料工业进展 总被引:4,自引:1,他引:3
中蓝晨光化工研究院有限公司《塑料工业》编辑部 《塑料工业》2010,38(3)
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。 相似文献
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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 总被引:15,自引:0,他引:15
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。 相似文献
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