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甘油近期市场行情分析 总被引:1,自引:0,他引:1
甘油又名丙三醇,它在医药、食品、化工等领域都有着广泛的用途。在医药领域主要用于抗菌防腐剂、柔和剂、保湿剂、增塑剂、溶剂、甜味剂等,广泛应用于口服、耳、眼、局部和肠道给药制剂。甘油在不同类型的药物制剂中起着不同的作用,如在乳膏、乳剂等局部用药制剂中用作保湿剂和柔和剂,在注射剂中被用于溶剂,在口服溶液制剂中则被用作溶剂、甜味剂、抗菌防腐剂、增稠剂等,在明胶软胶囊、膜包衣和明胶栓剂中还可用作增塑剂。 相似文献
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环氧树脂由于具有耐热、耐候、耐水、耐老化、耐腐蚀、抗张、抗弯、抗冲击等特性以及独特的粘接力和优良的电气性能,所以在国外广泛应用于涂料、胶粘剂、树脂改性剂、电子、电器、土木建筑、功能性材材、机械、交通、宇航等许多领域,其需要量还在不断增加。以日本为例。1987~1990年间环氧树脂总需要量每年以4~6%的比率增长。另外,在日本近年来环氧树脂在各个领域中的需求结构发生了一些变化,即环氧树脂在涂料、土 相似文献
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本文在综合大量文献的基础上,系统归纳出了新石器时代的中国陶器文化各个发展阶段及其特征,即在陶质上经历了红陶、灰陶、黑陶、白陶阶段;在制造工艺上,经历了手制、模制、慢轮、快轮阶段;在装饰上,经历了素陶、彩陶、非彩陶阶段;在窑炉上经历了平地堆烧、横穴窑、同穴窑、竖穴窑阶段。 相似文献
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简述当前国内外搪瓷行业生产中传统设备的生产状况,在具体介绍传统设备在搪瓷生产中存在的生产效率低、质量差、能耗高、柔性差等诸多不足的基础上,通过具体案例,介绍了自动化、信息化、智能化设备目前在部分搪瓷产品生产中的应用,综合对比了传统设备与智能化设备在搪瓷生产中的差异,详细研究了智能化设备在搪瓷行业生产中所具有的精密化、自动化、信息化、柔性化、图形化、智能化、可视化、多媒体化、集成化、网络化、数字化等优点,最后分析并指出,在当前国际"互联网+"及"工业4.0"的发展潮流中,智能化设备在搪瓷行业中的发展趋势。 相似文献
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N. N. Treushchenko B. A. Dmitrievskii A. A. Kazakov S. K. Tsvetkov A. Yu. Popov B. Ya. Galkin V. A. Treushchenko 《Theoretical Foundations of Chemical Engineering》2010,44(4):587-591
Iodine recovery with magnesium compounds with the production of iodine-containing compounds and the subsequent production of rocklike structures has been studied. The possibility of the complete recovery of iodine, including radioactive iodine, with the formation of oxygen-containing iodine compounds and the production of magnesium-containing composites with high mechanical properties was demonstrated. 相似文献
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介绍中国碘资源特点,贵州瓮福集团与贵州大学合作开发磷矿中伴生碘资源简况,国内外碘生产概况,碘的消费需求,主要无机、有机碘化物及其应用.最后对碘化工发展提出几点建议. 相似文献
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介绍了碘的主要生产方法,并论述了采用吹出吸收工艺从稀磷酸中回收碘在工业化过程中需要注意的问题及应对措施。 相似文献
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Yuqian Luo Akira Kawashima Yuko Ishido Aya Yoshihara Kenzaburo Oda Naoki Hiroi Tetsuhide Ito Norihisa Ishii Koichi Suzuki 《International journal of molecular sciences》2014,15(7):12895-12912
The global effort to prevent iodine deficiency disorders through iodine supplementation, such as universal salt iodization, has achieved impressive progress during the last few decades. However, iodine excess, due to extensive environmental iodine exposure in addition to poor monitoring, is currently a more frequent occurrence than iodine deficiency. Iodine excess is a precipitating environmental factor in the development of autoimmune thyroid disease. Excessive amounts of iodide have been linked to the development of autoimmune thyroiditis in humans and animals, while intrathyroidal depletion of iodine prevents disease in animal strains susceptible to severe thyroiditis. Although the mechanisms by which iodide induces thyroiditis are still unclear, several mechanisms have been proposed: (1) excess iodine induces the production of cytokines and chemokines that can recruit immunocompetent cells to the thyroid; (2) processing excess iodine in thyroid epithelial cells may result in elevated levels of oxidative stress, leading to harmful lipid oxidation and thyroid tissue injuries; and (3) iodine incorporation in the protein chain of thyroglobulin may augment the antigenicity of this molecule. This review will summarize the current knowledge regarding excess iodide as an environmental toxicant and relate it to the development of autoimmune thyroid disease. 相似文献
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August V. Bailey James A. Harris Evald L. Skau 《Journal of the American Oil Chemists' Society》1967,44(2):117-118
The concentrations of the major component glyceride types in cottonseed and pecan oils were calculated at selected iodine
values from the fatty acid compositions of the oils using the Gunstone equations. The relative concentrations of the glycerides
change markedly with increasing iodine value. In cottonseed oil the concentrations of the PLL and LLL glyceride types, for
example, increase from 19.5 to 26.3% and from 6.5 to 16.7%, respectively, for an iodine value change from 95 to 112. In pecan
oil the concentration of the OOL glycerides goes through a maximum at an iodine value of 110. The concentrations of the OLL
and OOO glycerides show a tenfold increase and fivefold decrease, respectively, as the iodine value increases from 90 to 120.
Graphs are presented which permit the estimation of the glyceride composition of random cottonseed or pecan oils of know iodine
value. These will be useful in the selection of these oils as source materials in the production of tailor-made fats and oils
or other edible or inedible industrial products.
So. Utiliz. Res. Dev. Div., ARS, USDA. 相似文献
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在硫酸分解磷矿生产湿法磷酸的过程中,碘一般是以碘化物的形式进入湿法磷酸中。在湿法磷酸生产过程中,回收碘就显得十分重要,这既提高了磷矿资源的利用程度,符合可持续发展的要求,又为相关企业增加一种极有价值的产品,从长远看,将带来更多的收益。 相似文献
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探讨了以花生壳为原料制备活性炭的工艺条件。通过单因素实验,分别比较不同活化剂、活化温度和活化时间对以花生壳为原料生产的活性炭碘吸附值和得率的影响。采用不同的活化剂时,用ZnCl2溶液作活化剂的活性炭得率较高,达48%;用ZnCl2溶液作活化剂,活化时间为1~5 h,活性炭得率为37%~51%,碘吸附值为244~371 mg.g-1,活化温度为350~750℃时,活性炭得率为8%~60%,碘吸附值为267~362 mg.g-1。花生壳与ZnCl2溶液质量比为1:3.5,ZnCl2质量浓度为15%,在450~550℃下连续炭活化3~4 h,为本实验室条件下以花生壳为原料制取活性炭的适宜工艺条件。 相似文献
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中低品位沉积型磷块岩磷矿需经选矿才能用于湿法磷酸生产。浮选磷精矿难以完全满足硝酸磷肥生产要求, 焙烧磷精矿更适合于硝酸磷肥生产。研究了硝酸酸解焙烧磷精矿过程工艺参数对五氧化二磷分解率及伴生碘三相迁移分布的影响, 并与硝酸酸解浮选磷精矿实验结果进行对比分析。结果表明, 酸解温度为60 ℃、酸解时间为50 min、硝酸质量分数为55% 和酸解比(硝酸与磷精矿的质量比)为1.2条件下, 焙烧磷精矿五氧化二磷分解率达到97.85%;酸解温度同为60 ℃条件下, 焙烧磷精矿的五氧化二磷分解率均高于浮选磷精矿, 而其他酸解工艺参数明显低于浮选磷精矿;两种磷矿伴生碘大部分升华至气相, 但焙烧磷精矿伴生碘更易于升华。 相似文献