化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2012年
7期
1512-1516
,共5页
吴娟娟%孟利芬%毛丽秋%尹笃林
吳娟娟%孟利芬%毛麗鞦%尹篤林
오연연%맹리분%모려추%윤독림
Cr(Ⅲ)/HMS%甲苯%液相氧化%苯甲醛
Cr(Ⅲ)/HMS%甲苯%液相氧化%苯甲醛
Cr(Ⅲ)/HMS%갑분%액상양화%분갑철
Cr(Ⅲ)/HMS%toluene%liquid-phase oxidation%benzaldehyde
以溶胶-凝胶法合成的HMS分子筛为载体,采用浸渍法制备了一系列的Cr(Ⅲ)/HMS负载型催化剂。考察了不同铬源、负载量对甲苯液相双氧水氧化制备苯甲醛的影响,并利用XRD、FTIR技术对催化剂进行了表征。结果表明,铬离子已经进入到载体HMS的骨架。以硝酸铬为铬源,铬负载量为15%的催化剂效果最好,甲苯的转化率为20.8%,苯甲醛的选择性达31.7%。并对甲苯液相氧化的反应机理作了初步的探讨。
以溶膠-凝膠法閤成的HMS分子篩為載體,採用浸漬法製備瞭一繫列的Cr(Ⅲ)/HMS負載型催化劑。攷察瞭不同鉻源、負載量對甲苯液相雙氧水氧化製備苯甲醛的影響,併利用XRD、FTIR技術對催化劑進行瞭錶徵。結果錶明,鉻離子已經進入到載體HMS的骨架。以硝痠鉻為鉻源,鉻負載量為15%的催化劑效果最好,甲苯的轉化率為20.8%,苯甲醛的選擇性達31.7%。併對甲苯液相氧化的反應機理作瞭初步的探討。
이용효-응효법합성적HMS분자사위재체,채용침지법제비료일계렬적Cr(Ⅲ)/HMS부재형최화제。고찰료불동락원、부재량대갑분액상쌍양수양화제비분갑철적영향,병이용XRD、FTIR기술대최화제진행료표정。결과표명,락리자이경진입도재체HMS적골가。이초산락위락원,락부재량위15%적최화제효과최호,갑분적전화솔위20.8%,분갑철적선택성체31.7%。병대갑분액상양화적반응궤리작료초보적탐토。
Cr(Ⅲ)/HMS catalysts were prepared by the impregnation method using Cr(NO3)3 as chromium source supported on HMS synthesized by the sol-gel method.The catalysts were characterized by XRD and FTIR.The effect of loading content of Cr and different chromium sources on liquid-phase oxidation of toluene to benzaldehyde with H2O2 was investigated.The results showed that chromium ion was incorporated into the framework of HMS.Cr(Ⅲ)/HMS catalyst with Cr-loading of 15% gave the best catalytic activity.The conversion of toluene and the selectivity for benzaldehyde reached 20.8% and 31.7% respectively.A reaction mechanism is proposed.