共查询到20条相似文献,搜索用时 93 毫秒
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吉林石化公司研究院与有机合成厂对环保型丁苯橡胶1502E的后部凝聚工艺调优取得成功.原有生产装置效益得到提升。经过几年的产研一体化攻关.吉林石化丁苯橡胶生产装置每年增效过亿,形成了具有自身特点的丁苯橡胶技术体系。 相似文献
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最近,吉林石化有机合成厂顺利生产出了1435.7吨环保型丁苯橡胶SBR1500E产品.产品性能达到技术设计要求。
吉林石化有机合成厂一直沿用传统的终止剂生产丁苯橡胶,其中所含的致癌物一亚硝胺偏高,不仅对使用者的健康造成危害,而且还对环境产生污染。为尽快解决这一瓶颈问题.该厂科研部门进行了环保丁苯橡胶技术开发工作。试验在14万吨丁苯橡胶装置A线上进行,产品全部达标,为明年生产万吨环保型丁苯橡胶做好了准备。 相似文献
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丁苯橡胶的挥发份是测定橡胶中水分和其它挥发性物质含量的指标,是影响产品质量的重要指标。生产中影响挥发份的因素很多,不仅涉及到干燥岗位的操作,与凝聚岗位的凝聚条件和胶乳的内在性质均有很大关系。本文论述了挥发份的影响因素及凝聚和干燥岗位的操作对挥发份的影响,以达到在生产过程中对挥发份进行控制的目的。 相似文献
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影响乳聚丁苯橡胶装置凝聚单元平稳运行的因素 总被引:1,自引:0,他引:1
介绍了南京扬子石化金浦橡胶有限公司丁苯橡胶装置凝聚单元的简要流程及胶乳的稳定与破乳。详细分析了搅拌、助剂、温度3个方面的因素对丁苯橡胶装置凝聚单元平稳运行的影响,为如何确保凝聚单元的平稳运行提供了参考。 相似文献
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利用精密自动绝热比热容实验装置,测量了丁苯橡胶合成过程中高分子凝聚液的比热容数据,为大型丁苯橡胶合成装置建造提供了基础物性数据。 相似文献
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《精细化工原料及中间体》2008,(5)
兰州石化年产10万吨丁苯橡胶装置开车3月27日,兰州石化公司年产10万吨丁苯橡胶装置投料开车。总投资6.8亿元的年10万吨丁苯橡胶项目.是兰州石化年产70万吨乙烯装置的后续配套项目。这个项目以国产化设备为主,生产技术完全采用兰州石化多年形成的自主知识产权技术,其主要生产单元的聚合方法为连续乳液聚合,生产的主要原料苯乙烯、丁二烯由兰州石化自己供给, 相似文献
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The transport properties of ionic liquids (ILs) are crucial properties in view of their applications in electrochem-ical devices. One of the most important advantages of ILs is that their chemical–physical properties and conse-quently their bulk performances can be well tuned by optimizing the chemical structures of their ions. This will require elucidating the structural features of the ions that fundamentally determine the characteristics of the nanostructures and the viscosities of ILs. Here we showed for the first time that the“rigidity”, the order, and the compactness of the three-dimensional ionic networks generated by the anions and the cation head groups determine the formation and the sizes of the nanostructures in the apolar domains of ILs. We also found that the properties of ionic networks are governed by the conformational flexibility and the symmetry of the anion and/or the cation head group. The thermal stability of the nanostructures of ILs was shown to be con-trolled by the sensitivity of the conformational equilibrium of the anion to the change of temperature. We showed that the viscosity of ILs is strongly related to the symmetry and the flexibility of the constitute ions rather than to the size of the nanostructures of ILs. Therefore, the characteristics of the nanostructures and the viscosities of ILs, especially the thermal stability of the nanostructures, can be fine-tuned by tailoring the symmetry and the conformational flexibility of the anion. 相似文献
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磷尾矿中元素赋存状态研究方法的探讨 总被引:3,自引:0,他引:3
对磷尾矿中元素赋存状态的一些研究方法进行了讨论,通过讨论对磷尾矿的综合研究、合理开发利用、重新设计选冶工艺流程等领域都具有十分重要的意义。 相似文献
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Claver IP Zhang H Li Q Zhu K Zhou H 《International journal of molecular sciences》2010,11(8):3002-3015
Starches were isolated from soaked and malted sorghum and studied to understand their physicochemical and functional properties. The swelling power (SP) and the water solubility index (WSI) of both starches were nearly similar at temperatures below 50 °C, but at more than 50 °C, the starch isolated from malted sorghum showed lower SP and high WSI than those isolated from raw and soaked sorghum. The pasting properties of starches determined by rapid visco-analyzer (RVA) showed that malted sorghum starch had a lower viscosity peak value (86 BU/RVU) than raw sorghum starch (454 BU/RVU). For both sorghum, X-ray diffractograms exhibited an A-type diffraction pattern, typical of cereal starches and the relative degrees of crystallinity ranged from 9.62 to 15.50%. Differential scanning calorimetry (DSC) revealed that raw sorghum starch showed an endotherm with a peak temperature (Tp) at 78.06 °C and gelatinization enthalpies of 2.83 J/g whereas five-day malted sorghum starch had a Tp at 47.22 °C and gelatinization enthalpies of 2.06 J/g. Storage modulus (G') and loss modulus (G″) of all starch suspensions increased steeply to a maximum at 70 °C and then decreased with continuous heating. The structural analysis of malted sorghum starch showed porosity on the granule's surface susceptible to the amylolysis. The results showed that physicochemical and functional properties of sorghum starches are influenced by soaking and malting methods. 相似文献