催化学报
催化學報
최화학보
CHINESE JOURNAL OF CATALYSIS
2012年
4期
605-609
,共5页
马建超%刘帅%范小鹏%杜小宝%闫喜龙%陈立功
馬建超%劉帥%範小鵬%杜小寶%閆喜龍%陳立功
마건초%류수%범소붕%두소보%염희룡%진립공
2,2,6,6-四甲基哌啶酮%2,2,6,6-四甲基哌啶醇%碱性氧化铝%2,6-二甲基-4-庚酮%铜%铬%伽马氧化铝
2,2,6,6-四甲基哌啶酮%2,2,6,6-四甲基哌啶醇%堿性氧化鋁%2,6-二甲基-4-庚酮%銅%鉻%伽馬氧化鋁
2,2,6,6-사갑기고정동%2,2,6,6-사갑기고정순%감성양화려%2,6-이갑기-4-경동%동%락%가마양화려
2,2,6,6-tetramethylpipeddin-4-one%2,2,6,6-tetramethylpiperidin-4-ol%basic alumina%2,6-dimethyl-4-heptanone%copper%,chromium%γ-alumina
在2,2,6,6-四甲基哌啶酮连续化加氢生成2,2,6,6-四甲基哌啶醇的反应中,Cu30Cr5/碱性氧化铝比Cu30Cr5/γ-Al2O3具有更优异的催化性能,反应的转化率和选择性分别高达99.0％和97.2％.N2物理吸附-脱附、X射线光电子能谱、X射线衍射和氨气程序升温脱附结果表明,Cu0作为催化加氢反应的活性中心,在Cu30Cr5/碱性氧化铝中具有更好的分散性,且随着碱性氧化铝的引入,催化剂酸性大幅下降,从而有效抑制副产物2,6-二甲基-4-庚酮的生成,因而产物2,2,6,6-四甲基哌啶醇的选择性显著提高.
在2,2,6,6-四甲基哌啶酮連續化加氫生成2,2,6,6-四甲基哌啶醇的反應中,Cu30Cr5/堿性氧化鋁比Cu30Cr5/γ-Al2O3具有更優異的催化性能,反應的轉化率和選擇性分彆高達99.0％和97.2％.N2物理吸附-脫附、X射線光電子能譜、X射線衍射和氨氣程序升溫脫附結果錶明,Cu0作為催化加氫反應的活性中心,在Cu30Cr5/堿性氧化鋁中具有更好的分散性,且隨著堿性氧化鋁的引入,催化劑痠性大幅下降,從而有效抑製副產物2,6-二甲基-4-庚酮的生成,因而產物2,2,6,6-四甲基哌啶醇的選擇性顯著提高.
재2,2,6,6-사갑기고정동련속화가경생성2,2,6,6-사갑기고정순적반응중,Cu30Cr5/감성양화려비Cu30Cr5/γ-Al2O3구유경우이적최화성능,반응적전화솔화선택성분별고체99.0％화97.2％.N2물리흡부-탈부、X사선광전자능보、X사선연사화안기정서승온탈부결과표명,Cu0작위최화가경반응적활성중심,재Cu30Cr5/감성양화려중구유경호적분산성,차수착감성양화려적인입,최화제산성대폭하강,종이유효억제부산물2,6-이갑기-4-경동적생성,인이산물2,2,6,6-사갑기고정순적선택성현저제고.
Alumina B (basic alumina,pH ＞ 8) was used as the support of copper-chromium catalysts for continuous hydrogenation of 2,2,6,6-tetramethylpiperidin-4-one (TAA) to 2,2,6,6-tetramethylpiperidin-4-ol (TMP).It was found that Cu30Cr5/alumina B exhibited better catalytic performance than Cu30Cr5/γ-Al2O3.99.0％ conversion of TAA and 97.2％ selectivity for TMP were obtained over Cu30Cr5/alumina B under optimized conditions.Cu30r5/γ-Al2O3 and Cu30Cr5/alumina B were characterized by N2 adsorption-desorption,X-ray diffraction,X-ray photoelectron spectroscopy,and NH3 temperature-programmed desorption.The results showed that Cu particles dispersed better in Cu30Cr5/alumina B than in Cu30Cr5/γ-Al2O3.
