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2006年我国硫磺市场行情分析 总被引:2,自引:0,他引:2
介绍了2006年我国硫磺生产和进口情况.2006年我国硫磺产量约1 000 kt,同比增长11.1%;进口硫磺8 813 kt,同比增长6.10%;2006-2009年国内将新增产能1 780 kt/a.分析了国产硫磺和进口硫磺价格走势及影响因素.2006年国产硫磺月平均价格从1月份的988元/t下滑到12月份的823元/t,进口硫磺到岸价由年初的90美元/t跌至年底的72美元/t,价格下滑趋势明显. 相似文献
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硫磺涨价困扰磷复肥行业 总被引:1,自引:0,他引:1
我国全年需进口硫磺900万~1 000万t,约占全球硫磺贸易量的1/3。我国对硫磺的强劲需求刺激国际市场硫磺价格迅速攀升,到岸价已涨到2 100~2 300元/t,对我国磷复肥行业造成巨大的成本压力。提出如何应对我国硫资源短缺的建议:在进口方式上联合行动;保持一定化肥出口;税收上应适当下调硫磺最终税率。 相似文献
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张瑞和 《精细与专用化学品》2007,15(16):26-29,35
阐述了我国糠醛、糠醇产品出口长期遭受反倾销制裁,致使行业损失较大、外汇大量流失、主销市场萎缩。在1995~2006年间,我国糠醛和糠醇的出口量出现了几次起伏涨落,出口价格不断走低,2006年糠醛和糠醇的出口量分别为32966t和74144t,平均价格分别为725美元/t和875美元/t,而1995年其平均价格则分别为1241美元/t、1661美元/t。2006年,反倾销制裁导致我国糠醛和糠醇出口的外汇损失分别为19599.3万美元和32161.2万美元。最后分析了我国糠醛和糠醇行业的国际地位和国际影响。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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杀虫磺缓释剂杀钉螺试验报告 总被引:1,自引:0,他引:1
杀虫磺缓释剂浸杀成螺、幼螺、螺卵效果好,现场应用缓释片63克/米^2,半年后活螺平均密度下降93.2%,春季施药1次,可达到控制当年钉螺的扩散。 相似文献
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为实时监控化学-酶法制备氰氟草酯反应过程,建立了一种该体系中氰氟草酯的RP-HPLC的检测方法。采用SymmetryC18柱(5μm,4.6 mm i.d.×150 mm),以V(甲醇)∶V(水)=80∶20为流动相,流速为1.0 mL/min,紫外检测波长为282 nm,柱温为30℃,进样量为20μL。氰氟草酯在5.0~1000.0 mg/L范围内线性良好,相关系数达到0.9999,检出限为1.0 mg/L,相对标准偏差为0.58%(n=5),加标回收率在92.3%~101.5%之间。 相似文献