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Alkylation of o-Xylene with Styrene over Modified Mordenite for Environmentally Friendly Synthesis of PXE

ISSN号：1008-6234
期刊名称：《中国炼油与石油化工：英文版》
时间：0
分类：TQ085[化学工程]
作者机构：[1]东南大学化学化工学院,南京211189, [2]南京晓庄学院生物化工与环境工程学院,南京211171, [3]江苏省光电功能材料工程实验室,南京211189
相关基金：Foundation items： The National Natural Science Foundation of China （No. 51077013）, China Postdoctoral Science Foundation （No. 2014M560381）, Jiangsu Planned Projects for Postdoctoral Research Funds（No. 1401033B）, Transformation Program of Science and Technology Achievements of Jiangsu Province （No. BA2011086）, the 333 High-Level Talents Training Project of Jiangsu Province （No. BRA2010033）, the Project of Young Scientist Foundation of Nanjing Xiaozhuang University （No. 2013NXY89）.

作者： Kong Jie Sheng Xiaoli Zhou Yuming Zhou Shijian Zhang Zewu[1]

关键词：无磷阻垢剂, 碳酸钙, 分散铁, 工业冷却水循环系统, phosphorous free antiscalant, calcium carbonate, industrial cooling systems, phosphorous free antiscalant, calcium carbonate, industrial cooling systems

中文摘要：

采用绿色聚醚封端技术合成了含聚氧乙烯基重复单元的大分子单体烯丙基聚氧乙烯基羧酸，然后与丙烯酸在水相中通过自由基聚合反应合成了一种新型的双亲水嵌段共聚物阻垢剂，并深入研究了其在循环冷却水系统中阻碳酸钙和分散氧化铁的性能。实验结果表明该共聚物具有优异的阻碳酸钙和分散氧化铁性能，XRD表征表明加入无磷非氮的共聚物阻垢剂得到的碳酸钙晶体在方解石结构中混有了部分球文石结构，通过红外光谱、扫描电子显微镜和透射电子显微镜同样可以证实碳酸钙晶体结构的变化。提出了聚乙二醇链段与钙离子通过相互作用来抑制水垢形成的基本动力机理。

英文摘要：

Allylpolyethoxy carboxylate macromonomers possessing polyethylene oxygen long chains were synthesized by advanced technology of the polyether cap.A novel double-hydrophilic block copolymer was prepared through free radical polymeric reactions in aqueous solution and its performance on CaCO3 inhibition and dispersancy activity towards Fe2 O3 was evaluated in recirculating cooling water systems.The study shows that acrylic acid-allylpolyethoxy carboxylate has a significant ability to inhibit the precipitation of calcium carbonate and an excellent dispersing capability to stabilize iron Ⅲ in industrial cooling systems. X-ray diffraction shows that there is a number of vaterite crystals in the presence of the phosphorous free and non-nitrogen copolymer. The change in crystal forms is also confirmed by the Fourier-transform infrared spectra the scanning electron microscopy and the transmission electron microscopy. The inhibition mechanism is proposed and it shows that the interactions between calcium and polyethylene glycol PEG are the fundamental impetus for restraining the formation of the scale in cooling water systems.