文献类型：期刊文献

中文题名：酸处理铌酸对合成2,5-二甲基-2,4-己二烯催化作用的研究

英文题名：Study on Acid Modified Niobic Acid Catalyst for Synthesis of 2,5- Dimethyl -2,4- Hexadiene

作者：陈君琴[1];刘纯山[1];俞丹群[1];彭英丹[1]

机构：[1]华东理工大学工业催化研究所,上海200237

年份：2004

卷号：33

期号：9

起止页码：865

中文期刊名：石油化工

外文期刊名：Petrochemical Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：铌酸;2,5-二甲基-2,4-己二烯;酸处理;硝酸;磷酸

外文关键词：niobic acid; 2,5-dimethyl-2,4-hexadiene; acid-treatment; nitric acid; phosphoric acid

摘要：研究了用硝酸、硝酸+磷酸处理的铌酸对制备2,5-二甲基-2,4-己二烯的催化反应活性的影响。并用XRD、原位红外、BET等技术手段考察了它们的结构特征、表面酸性和酸强度。酸处理后的铌酸的催化活性由未处理的18％提高到75％以上,并且相当稳定,寿命也由不到30 h延长到400 h以上,同时括性没有下降趋势。酸处理改变了铌酸的表面酸性和结构特征,孔径明显增大,特别是经硝酸+磷酸处理的铌酸。
Treatment of niobic acid with nitric acid and phosphoric acid and its catalytic activity in Prins reaction for 2,5 -dimethyl -2,4 - hexadiene synthesis had been studied. By means of XRD,in situ FTIR and BET,the acid-treated niobic acid was found to be effective in the reaction by changing its surface acid properties and structural character. The catalytic activity was raised from 22% to more than 75% before and after acid treatment. The acid treated catalyst was stable. When reaction time prolonged from 30 h to 400 h,the catalytic activity exhibited no trend of dropping. The pore diameter of acid-treated niobic acid was increased, especially with phosphoric acid.