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为了在不增加顺丁橡胶装置凝聚能耗的前提下降低物耗,在实施三釜差压凝聚的基础上,增加了预凝聚工艺,阐述了预凝聚工艺原理,该工艺主要由汽水混合器、胶液过热水混合器和喷嘴3部分构成;在预凝聚过程中,蒸汽的作用是通过胶液与过热水充分混合来实现的,过热水温度是该过程重要的工艺控制条件;通过溶剂绝热闪蒸热量衡算,建立了过热水最低允... 相似文献
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在顺丁橡胶的实际生产过程中,经常会发生聚合挂胶的现象,这对正常生产和产品质量产生了很大的影响,严重时还容易造成设备的损坏。 相似文献
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对目前国内采用镍系催化剂溶液聚合法生产顺丁橡胶过程中挂胶严重的原因进行了分析,并提出了解决办法,在原材料和催化剂质量合格并控制合适加水量的基础上,降低催化剂用量,控制好催化剂铝与硼的比值和稳定好聚合反应,就能减少凝胶生产量,减轻挂胶,提高产品质量。 相似文献
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不同催化体系顺丁橡胶胎冠胶性能比较 总被引:2,自引:0,他引:2
对钴系、钕系和镍系顺丁橡胶(BR)胎冠胶物理性能和工艺性能进行对比。结果表明:钕系BR胶料综合物理性能最好,表现为弹性和耐磨性能好,压缩生热低,300%定伸应力和撕裂强度高;国产镍系BR9000胶料的综合物理性能优于钴系BR150和BR1203G-1胶料,尤其是耐屈挠性能和抗刺扎性能好;镍系BR胶料的工艺性能最好,钕系BR胶料的半成品工艺性能较差。 相似文献
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通过对现有甲基乙烯基硅橡胶生产工艺、过程和设备的分析研究,针对高粘度流体传热难度大的问题,进行了热流体混合速度及反应速度的试验,设计了一种生产甲基乙烯基硅橡胶的新工艺。 相似文献
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A slow bromination process of butyl rubber (IIR) suffers from low efficiency and low selectivity (S) of target-product. To obtain suitable approach to intensify the process, effects of assistant solvents and mixing inten-sity on the bromination process were systemically studied in this paper. The reaction process was found constantly accelerated with the increasing dosage and polarity of assistant solvent. Hexane with 30%(by volume) dichloro-methane was found as the suitable solvent component, where the stable conversion of 1,4-isoprene transferring to target product (xA1s) of 80.2%and the corresponding S of 91.2%were obtained in 5 min. The accelerated reaction process was demonstrated being remarkably affected by mixing intensity until the optimal stirring rate of 1100 r·min-1 in a stirred tank reactor. With better mixing condition, a further intensification of the process was achieved in a ro-tating packed bed (RPB) reactor, where xA1s of 82.6% and S of 91.9% were obtained in 2 min. The usage of the suitable solvent component and RPB has potential application in the industrial bromination process intensification. 相似文献
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