乳聚丁苯橡胶生产技术进展

介绍了国内乳聚丁苯橡胶的生产装置和技术发展现状,以及国外的技术发展趋势,对我国乳聚丁苯橡胶行业发展提出了建议。     

乳聚丁苯橡胶的生产技术进展

一、乳聚丁苯橡胶装置状况 据国际合成橡胶生产者协会（IISRP）统计,2006年全球共36个生产商的40家工厂生产乳聚丁苯橡胶（ESBR）,总能力为404．9万吨／年,2007年412．7万吨／年（未统计中国扬子金浦橡胶公司10万吨／年）,具体情况见表1。     

预交联乳聚丁苯橡胶的制备技术进展

介绍以胺类、脂类、硅烷类、羧酸类官能剂作为第三单体,通过乳液聚合工艺制备预交联丁苯橡胶的方法。第三单体可改变预交联乳聚丁苯橡胶的结构,提高预交联乳聚丁苯橡胶的物理性能并使其满足高性能子午线轮胎低滞后损失等要求。预交联乳聚丁苯橡胶制备技术是乳聚丁苯橡胶开发的热点之一。     

10万t/a乳聚丁苯橡胶工艺技术改进及应用

山东齐鲁石化工程有限公司10万L/a乳聚丁苯橡胶(ESBR)原工艺中存在如下问题:滗析器聚合现象严重;苯乙烯汽提塔操作稳定性差;单体回收工段的废水直接送污水处理场;丁二烯闪蒸系统闪蒸空间较小.经过技术改进后,不仅解决了原工艺存在的技术问题,而且降低了能耗、物耗,取得了良好的经济效益和社会效益.     

20世纪90年代景德镇陶瓷雕塑特征研究

本文主要运用统计学与图像学的方法,对90年代景德镇陶瓷雕塑进行分类、梳理。从相关权威书籍、期刊中提取此时期陶瓷雕塑图像资料并梳理相关数据比例,按照题材与装饰手法进行分类,推论此时期陶瓷雕塑的装饰语言与风格特征。旨在探索其规律及现象,为今后的陶瓷雕塑创作提供借鉴参考。     

乳聚丁苯橡胶成套技术创效近亿元

以吉林石化为主体开发的“乳聚丁苯橡胶成套技术”日前摘得2008年中国石油10项重大科技进展和中国石油集团公司科技进步一等奖两项桂冠,这是中国石油下游板块第一项有影响力的成套技术开发成果。开发这项技术投入并不多,但大幅度提高了装置产能,节能减排效果明显,年可获得直接经济效益近亿元。     

21世纪我国丁苯橡胶发展趋势

介绍了我国丁苯橡胶的生产、应用和市场现状及发展趋势。     

国外乳聚丁苯橡胶生产技术的发展趋势

国外乳聚丁苯橡胶生产技术的发展趋势主要表现在完善聚合配方、改进无盐凝聚技术、提高聚合单体转化率、改善产品性能和开发新品种等方面。本文对此作了简单介绍。     

国外乳聚丁苯橡胶生产技术进展及我国发展方向探讨

从聚合配方、聚合工艺、过程控制和改性技术等4个方面介绍了国外乳聚丁苯橡胶生产技术的新进展,并探讨了我国乳聚丁苯橡胶的发展方向。     

近10年来有机催化新进展

介绍现代有机催化发展的主要特点,阐述近１０年来世界上在有机合成、污染控制、高分子化工、石油化工中的新型催化剂以及在研催化剂,简介我国催化剂研究的现状并对未来研究趋势作了预测     

90年代国内外乙丙橡胶催化剂的研究进展

详细论述了90年代国内外乙丙橡胶(EPR)钒系、钛系、茂金属、Lovacat催化剂的研究进展,对各种催化剂EPR的产品性能进行了比较,并预测催化剂体系的发展趋势;同时对我国EPR用催化剂的研究和生产提出了希望和建议。     

Detergent enzymes: Developments during the last decade

The decade of the seventies saw dramatic changes in the formulation of heavy duty laundry detergents. The reduction in the STPP content in laundry product formulations was a notable example. During the early 1970s, heavy duty liquid laundry detergents were introduced and today represent an estimated 20% of the heavy duty laundry detergent market. A significant trend during this decade toward lower wash temperatures also appeared. These developments in home laundry products and washing trends have been followed by collateral developments in detergent enzyme technology. During the 1970s, a new generation of high alkaline, active detergent enzymes were developed. This new group of alkaline proteases were characterized by greater activity and stability under conditions of alkalinity between pH 10.5 to near 12, thus favoring phosphate-free detergent formulations. These enzymes also were found to exhibit superior stability in nonbuilt liquid laundry detergent systems. Safety considerations at the plant operation level have resulted in a continual improvement in the quality of coated and encapsulated detergent enzyme granulates. During the past 10 years, detergent enzymes have passed through three generations of physical forms, from the powders to prills to encapsulates. The decade of the 1980s offers exciting possibilities for enzymatic laundry products. The trend toward lower wash temperatures, caused initially by the popularity of synthetic fabrics, is being compounded by a radical reappraisal of household energy consumption patterns. In this new atmosphere of energy conservation, detergent enzymes will offer energy-saving options in an assortment of laundry products. Finally, as we start this decade of the 1980s, the spiralling cost of petrochemical feedstocks will cause us to rethink laundry product formulations and here again, detergent enzymes offer an important alternative for the future.     

Studies on electronic processes in graphite during the last decade in Japan

This paper intends to briefly review the studies on the energy band structure and electron transport properties of graphite which have been performed in Japan mostly during the last decade, say since around 1970. Topics dealt with are the overall band structure calculated on the basis of the combined OPW-TB approximation, topographical research of the Fermi surface, anomalous transport phenomena resulting from the extremely strong electron-phonon coupling, c-axis conduction in connection with the stacking fault structure, new important findings obtained through further detailed investigation of galvano-magnetic effects, and the quantum-limit behaviors under ultrahigh magnetic fields leading to an electronic phase transition.     

高转化率E－SBR1500生胶和硫化胶的性能研究

对用高活性引发体系在较短聚合周期（９—１１ｈ）内合成的高转化率（７％）Ｅ－ＳＢＲ１５００生胶的门尼粘度、凝胶含量、结合苯乙烯含量、分子量分布、组成分布和微观结构等基本特性参数和硫化胶的物性进行了试验研究。结果表明：生胶的各项特性指标和硫化胶物性均达到了６０％转化率的我国吉化和日本ＪＳＲ胶样的实测值水平。     

乳聚丁苯橡胶装置生产工艺的优化

总结了近年来兰州石化公司合成橡胶厂丁苯橡胶装置技术进步的情况。对乳化剂歧化松香酸钾皂中的“有效皂”成分实施有效监控 ,可使工艺更加平稳 ;适当提高脂肪酸皂的用量并使其与歧化松香酸钾皂保持合理的配比 ,可提高聚合效率并有利于产物的 30 0 %定伸应力。用乙二胺四乙酸铁钠盐替代硫酸亚铁体系作引发剂应是今后的趋势 ,聚合系统 pH值的控制范围亦为 11.2± 0 .2。采用控制各个聚合釜温度或几台釜组合调节温度的方法可较好地控制转化率 ,而通过调节单体加料量则可以控制反应时间 ,从而优化工艺控制。将闪蒸槽用湿润蒸汽加热 ,并对脱气系统实行加热梯度控制以及增加关键部位的阻聚剂用量 ,都能使装置的运行周期得以极大地延长。     

高转化率E-SBR1500生胶和硫化胶的性能研究

对用高活性引发体系在较短聚合周期（９－１１ｈ）内合成的高转化率（７０％）Ｅ－ＳＢＲ１５００生胶的门尼粘度、凝胶含量，结合苯乙烯含量，分子量分布，组成分布和微观结构等基本特性参数和硫化胶的物性进行了试验研究，结果表明，生胶的各项特性指标和硫化物性均达到了６０％转化率的我国吉化和日本ＪＳＲ胶样的实验值水平。     

20世纪90年代国外化工企业的结构调整

简述国外化工企业产业结构,产品结构的调整情况和发展趋势。