共查询到18条相似文献,搜索用时 203 毫秒
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胶束催化合成环氧丙烷的清洁生产技术 总被引:2,自引:0,他引:2
介绍了国外在环氧丙烷清洁生产技术领域的新研究进展:环氧丙烷胶束催化氧化技术,包括胶束催化的机理、胶束催化体系设计以及工艺开发。胶束催化体系更适合于设计原位分离反应工艺,以表面活性剂、催化剂、助催化剂为主的胶束催化体系设计是胶束催化技术的关键。指出开发清洁经济的环氧丙烷生产技术是环氧丙烷工业持续发展的关键,建议加强环氧丙烷胶束催化技术的研究及相关工艺开发。 相似文献
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介绍了超临界二氧化碳(scCO2)胶束催化技术的研究进展:scCO2胶束及其相特征、CO2表面活性剂及scCO2胶束催化技术的应用与工艺开发。scCO2胶束及其相特征对于设计高效的亲CO2表面活性剂及研究scCO2胶柬催化作用具有重要指导意义。scCO2胶束的相特征主要是温度、压力和胶束含水比的函数。指出了开发亲CO2表面活性剂的一些基本原则,其中降低表面活性剂在H2O/CO2表面的界面张力和提高活性剂的吸附能力要比提高溶解度更为重要。scCO2胶束催化技术可以明显提高催化反应活性,适合于开发原位分离反应工艺。建议加强scCO2胶束催化技术的研究及相关工艺开发。 相似文献
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从国际,国内聚氯乙烯制品对增塑剂需求市场形势分析出发,特别是亚洲,美国,西欧,俄罗斯工业增塑剂产品等地区的消费结构及供求关系,工业塑料与增塑剂的现状,发展与消费结构关系,综述了全球塑料助剂市场对增塑剂品种,产量的需求与预测;论述了工业增塑剂行业的清洁生产艺研究最新进展,特别是国内外采用固体超强酸,稀土固体酸,固载杂多酸及复合固体氧化物催化剂催化酯化合成工业增塑剂的研究动态,高效,持效,无毒或低毒,无公害化的增塑剂产品,清洁化工业生产方式是全球塑料助剂的发展趋势。指出了国内增塑剂工业重点还应在开发和研究的多品种上,合理调整增塑剂产品的结构,满足不同PVC制品,新型高分子材料等对增塑剂的高性能要求,并指出了国内外增塑剂产量仍将保持较高增长速度的可能性。 相似文献
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我国化学工业中清洁生产技术的研究进展 总被引:1,自引:0,他引:1
分析了我国化学工业清洁生产研究概况,指出我国有关清洁生产研究的主要内容集中在循环经济、生态工业园、节能减排、绿色化学和产业链以及清洁生产的评价与审核等方面。总结了我国化学工业中的各种清洁生产技术,包括过程模拟技术、过程集成技术、清洁生产工艺、清洁反应体系、超常规生产技术、催化技术、化工设备的发展和清洁能源等,指出未来清洁生产技术的发展趋势必然是化工生产技术与信息技术、计算机技术、检测技术、智能信息处理技术和装备制造技术等的有机结合,并提出了从生命周期全过程考察清洁生产技术的清洁性以及在清洁生产技术基础上发展循环经济的建议。 相似文献
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针对环氧丙烷生产中环氧丙烷尾气难回收问题,提出了甲醇吸收和环氧丙烷萃取精馏解吸回收的环氧丙烷回收新工艺。该工艺同时考虑无催化环氧丙烷水解和与甲醇反应,并采用共沸精馏分离获得高附加值产品丙二醇单甲醚。选用NRTL热力学方法,对上述流程进行了全流程模拟和优化设计,分析了溶剂比、理论塔板数、吸收剂进料温度等主要工艺参数对分离的影响规律,发现新工艺对环氧丙烷质量回收率达到99.99%。研究结果对环氧丙烷工业装置产能提升、节能降耗和挥发性有机物(VOCS)治理具有指导作用。 相似文献
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Alan T. Bull 《Korean Journal of Chemical Engineering》2001,18(2):137-148
Until recently waste production was seen as an inevitable outcome of industrial production and processing, and a problem that
could be managed by end-of-pipe andin situ biotreatment, disposal, or simply be ignored. However the introduction of clean, or cleaner, technology options now is focussing
attention on the minimisation of materials and energy use, and waste generation, and upon recycle. Thus clean technology has
emerged as a concept that is compatible with industrial sustainability, and whose environmental benefitsand economic competitiveness have been demonstrable over a range of industrial sectors. Biotechnology is an enabling technology
that offers one important route to clean products and processes; it provides powerful and versatile tools that can compete
with chemical and physical means of reducing both material and energy consumption, and the generation of wastes and emissions.
The wide penetration of biotechnology in industry has still to occur but many examples of its ability to deliver clean and
competitive products and processes are now available particularly through the development and application of biocatalysts.
The introduction of clean or cleaner processing does not necessarily entail a complete change in manufacturing strategy or
the refitting of plant. Upgrading existing manufacturing processes by fitting biotechnology unit stages illustrates the opportunities
for such intermediate technology. Nevertheless, for biotechnology to achieve its full potential as a basis for clean industrial
products and processes beyond its current applications, innovative R&D will be needed. The successful application of biotechnology
as a clean technology is illustrated in this review through a series of case studies, while the innovative nature of biotechnology
in this context is demonstrated by the development and application of novel biocatalysts. 相似文献
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分析了国内环氧丙烷(PO)的生产和消费状况,介绍了原料丙烯的影响及其在聚氨酯、聚碳酸酯和二氧化碳基可降解塑料等下游产业链的应用前景,综述了工业生产上氯醇法、共氧化法和过氧化物直接氧化(HPPO)法制备PO的技术特点及发展趋势。指出PO市场具有较大的发展空间;HPPO法安全环保、清洁高效,是未来PO产业发展的方向。针对当前PO产业存在的区位产能过于集中,单体生产规模偏小、落后技术所占比例高等问题,提出:结合中西部地区原料丙烯供给和对PO消费需求,合理调整产业布局;推广国产化HPPO工艺,加快实施产业升级;构建上下游一体化产业链,形成规模化生产,实现效益最大化等发展建议。 相似文献
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详细介绍并比较了当前环氧丙烷(PO)的几种工业化生产工艺的优缺点,重点介绍了BASF-Dow公司联合开发的过氧化氢-环氧丙烷(HPPO)工艺.该工艺唯一的副产物是水,是当前PO清洁生产工艺中发展最快的一种方法,它具有环境友好、工艺及设备投资低等优点. 相似文献
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介绍了浙江省在90 年代初研究开发优化动力配煤技术、清洁燃烧添加剂技术,建设杭州煤场生产洁净煤及清洁燃烧添加剂产品, 在全国范围内推广洁净煤在工业炉窑内清洁燃烧达到减排污染物等产业化实践。展望了21 世纪浙江在煤炭转化提质、气化、液化等实现产业化的前景。论述了在浙江省形成和发展洁净煤技术产业链的思路。 相似文献
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The major obstacles to current development of clean coal technologies (CCT) are investigated, based on study of current laws, regulations and policies which have been used to accelerate CCT development in China, evaluation of implementation of these regulations, policies and economic incentives, and comparison between Chinese and foreign experiences. The evaluation of available clean coal technologies is conducted in four areas, i.e. power sector, industrial boiler, chemical production and fuel oil substitution and household use. In addition, clean coal technologies and the development plans suitable for the Chinese situation are suggested. Finally, based on technical and economic evaluation, policy and countermeasure recommendations on development of Chinese clean coal technology are made. 相似文献
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Reactions of alkylene oxides with carbon dioxide underlie the industrial technology of ethylene- and propylene carbonates.
Looking for new catalytic systems for these processes remains of interest due to the possibility of creating a new energy-saving
process for the production of ethylene and propylene glycols. This work is aimed at comparing the catalytic activity of halogenides
in the reaction of propylene oxide (PO) and carbon dioxide in the presence of tetrasubstituted ammonium and phosphonium halogenides,
and evaluating the feasibility of using them in designing industrial technologies for the production of alkylene carbonates
and glycols as active catalytic systems. Triphenylphosphine halogenides have been shown to possess high catalytic activity
as compared to triethanolamine-based analogs. In terms of efficiency, triphenylphosphonium bromides are as good as the familiar
catalysts based on potassium iodide. The high activity of these catalysts in the reaction for propylene carbonate (PC) production
and their good solubility in the reaction medium allow us to propose them for the development of industrial technology for
the subsequent production of alkyl carbonates and alkylene glycols. 相似文献
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煤制油--煤化工业的绿色技术 总被引:3,自引:0,他引:3
煤制油通常有直接液化和间接液化,论述了煤的液化合成液体燃料的开发趋势和工业化状况.发展和应用洁净煤技术,是解决中国燃油短缺、保护环境的根本选择. 相似文献