渗透汽化汽油脱硫技术研究进展

随着环保法规的日益严格,世界各国对清洁汽油中硫含量做出了严格的规定,汽油的低硫化甚至无硫化已成为一种必然趋势,汽油的深度脱硫技术已成为各石油公司和相关研究者的研究热点。渗透汽化是一种新型高效的膜分离技术,其在汽油深度脱硫技术方面具有独特优势。介绍了渗透汽化汽油脱硫技术的基本原理、工艺特点及国内外有关研究进展情况。     

推行清洁生产的战略意义及途径

介绍了清洁生产的内容,分析了推行清洁生产的意义,并对我国实施清洁生产的途径进行了讨论.     

一次多级离心泵运行故障处理及分析

简要介绍了实际生产中多级离心泵存在的问题,并分析了故障原因和处理措施。     

One‐step synthesis and ring‐opening polymerization of novel macrocyclic(arylene multisulfide) oligomers

A series of macrocyclic(arylene multisulfide) oligomers were synthesized under high dilution conditions by reacting diphenyl ether/diphenyl/diphenyl disulfide/diphenyl methane with dichloro disulfide in the presence of a trace amount of iron powder by a one‐step reaction. From MALDI‐TOF mass spectra, it was established that the repeating units of the cyclization ranged from two to seven and the unit of macrocyclic(arylene multisulfide) oligomers had one to seven sulfur atoms. The macrocyclic oligomers readily underwent ring‐opening polymerization in the melt, resulting in linear, high molecular weight polymultisulfides. DSC thermograms demonstrated that the four polymultisulfides, derived from the macrocyclic(arylene multisulfide) oligomers, are amorphous in nature. The macrocyclic(arylene multisulfide) oligomers and polymers were analyzed by MALDI‐TOF‐MS, IR, HPLC, NMR, DSC, and TGA methods. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 735–741, 2004     

GIS技术在清洁小流域治理中的应用

GIS技术有便捷的数据管理、强大的空间分析和直观的三维可视化能力,在清洁小流域治理中应用GIS技术,可有效地实现海量数据管理、复杂空间分析与决策支持,为实现美丽乡村提供强大技术支撑。以河南省淅川县草庙沟小流域为例,详细介绍了利用GIS技术进行清洁小流域治理的技术路线。利用GIS技术,可在高分辨率影像上获取准确的各级汇水区、植被覆盖信息和地类信息,再结合实测水质数据和土壤、污染、降雨等调查数据,以清洁小流域示范工程技术指南为技术标准,可便捷直观地划分小流域的各治理分区、进行三维施工设计、经费测算和效益分析。因此,GIS技术的利用可有效提升清洁小流域的管理能力。     

煤炭的高效清洁利用——煤气化技术

阐述了煤气化技术是当今煤炭高效洁净利用的关键技术之一.通过对目前几种工业化的煤气化技术的分析比较,指出了煤气化技术的发展方向,并针对陕北能源基地的建设和煤化工的发展提出了一些建议.     

大型渣油气化炉激冷室热质传递过程模拟

对现行８．５３ＭＰａ德士古渣油气化炉激冷室中热质传递过程进行了分析、研究，从数学模型着手，进行模拟计算，模拟结果与工业数据吻合良好。通过模拟揭示了激冷过程本质特征，探讨了现行激冷环损坏的主要原因。     

Cationic copolymerization behavior of a bicyclic orthoester having hydroxy group with glycidyl phenyl ether and volume change on their copolymerization

This article describes cationic ring‐opening copolymerization of a bicyclic orthoester having hydroxy group (BOE‐OH) and glycidyl phenyl ether (GPE), and the volume shrinkage behavior during the copolymerization. THF soluble polyethers [poly(BOE‐OH‐co‐GPE)] were obtained by the copolymerizations at 80–180°C, while crosslinked poly(BOE‐OH‐co‐GPE) was obtained by the copolymerizations at 220–250°C. This crosslinking reaction may originate from the dehydration of methylol groups in the side chain of poly(BOE‐OH‐co‐GPE). The volume shrinkage during the cationic copolymerization reduced as the increase of the BOE‐OH feed ratio. By contrast, the volume shrinkage on the crosslinking polymerization was almost independent on the BOE‐OH feed ratio. Poly(BOE‐OH‐co‐GPE)s with higher BOE‐OH composition showed lower thermal weight loss temperature owing to the release of H₂O by dehydration of methylol groups. The BOE‐OH component in the THF soluble poly(BOE‐OH‐co‐GPE)s lowered the glass transition temperature (T_g), while that in the crosslinked poly(BOE‐OH‐co‐GPE) increased the T_g probably because of the higher crosslinking density. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1356–1361, 2006     

燃煤和大气污染

介绍了煤炭作为中国主要能源在开发利用过程中对大气污染的计数据，论述了燃煤的洁净技术和污染控制技术，提出今后发展的目标     

EDTA在尿素换热设备清洗中的应用

草酸法清洗换热设备垢层时对设备腐蚀严重。EDTA能与积垢中的铁离子反应生成溶于水的络合离子,达到清洗积垢的目的,对设备腐蚀程度也小,通过EDTA、Fe含量的变化可判断清洗程度。