共查询到20条相似文献,搜索用时 280 毫秒
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硫酸生产中的余热回收产生蒸汽用于发电.分析大气温度变化对发电效率的影响,并指出长期以来对硫酸装置附属的发电系统的设计与运行重视不够,使大气温度较高的夏季,特别是南方地区的硫酸企业余热回收的发电效率大大降低.该问题希望引起有关设计部门重视. 相似文献
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针对甲醇装置配套的空分装置空压机机组负荷提不上去的问题,分析原因,提出技改方案,实施后机组负荷显著提高,空压机气量在夏季高温运行时达到142000m3/h,确保装置高负荷生产的需要。 相似文献
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S. H. Botros A. F. Moustafa S. A. Ibrahim 《Polymer-Plastics Technology and Engineering》2013,52(4):503-512
The graft copolymerization of acrylonitrile (AN) onto butadiene rubber (BR) was carried out in toluene at 80°C, using dibenzoyl-peroxide (BPO) as initiator. The synthesized poly acrylonitrile-grafted-butadiene rubber (AN-g-BR) was characterized by N% elemental analysis and Fourier-transform infrared (FT-IR) spectroscopy. Styrene butadiene rubber/acrylonitrile butadiene rubber (SBR/NBR) blends were prepared with different blend ratios in presence and absence of AN-g-BR, where the homogeneity of such blends were examined with intrinsic viscosity (η) measurements, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). The scanning electron micrographs illustrate disappearance of the macro-scale phase separation of SBR/NBR rubber blend as a result of the incorporation of AN-g-BR into that blend. Viscosity measurements confirm homogeneity of that blend. Differential Scanning Calorimetry traces exhibit shifts in glass transition temperatures (T g's) of SBR and NBR in their blend, indicating some degree of homogeneity. Physico-mechanical properties of the rubber blend vulcanizates with different blend ratios, in presence and absence of AN-g-BR, were investigated before and after accelerated thermal aging. The SBR/NBR (25/75) homogeneous blend possessed the best physico-mechanical properties after thermal aging, together with the best swelling behavior in motor oil. The physico-mechanical properties of SBR/NBR (25/75) filled blend with different types of inorganic fillers during thermal aging were studied. 相似文献
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通过对大庆石化公司顺丁橡胶装置生产过程的实践和分析,提出几种降低丁二烯系统氧含量的工艺方法和控制手段。从而减少丁二烯系统自聚物的生成,提高装置运行的安全性和稳定性,为装置的长周期运行提供有力保障。 相似文献
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顺丁、丁腈橡胶离聚体改性聚氯乙烯研究 总被引:2,自引:0,他引:2
用马来酸酐接枝橡胶和金属离子交联形成离聚体的方法可提高顺丁橡胶(BR)、丁腈橡胶(NBR)、PVC三元共混物的相容性,以交联剂、引发剂、接枝单体为三要素,采用正交试验方法,通过综合评分法,优选了三元离聚体配方,在此基础上用部分硬脂酸锌代替无机氧化锌作离子交联剂,使合金材料获得了满意的性能,与未经改性PVC/BR/NBR三元共混物相比,硬脂酸锌离子交联马来酸酐接枝的三元合金的拉伸强度提高了101%,断裂伸长率增加113%,红外光谱证明了马来酸酐接枝顺丁胶与锌离子的离子交联的存在,且硬脂酸锌的效果优于氧化锌。 相似文献
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分析了世界和中国丁二烯橡胶的供需状况与未来趋势以及价格走势,综述了丁二烯橡胶催化体系和生产工艺的技术进展,提出了发展我国丁二烯橡胶的几点建议. 相似文献
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根据上海石洞口煤气制气有限公司利用现有资源及设施条件,拟建一套24kt/a丁二烯抽提装置,通过对DMF,NMP和ACN法进行比较,并结合企业实际情况,推荐采用DMF法。 相似文献
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