物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2012年
9期
2141-2147
,共7页
杨芳%许响生%顾辉子%陈傲昂%严新焕
楊芳%許響生%顧輝子%陳傲昂%嚴新煥
양방%허향생%고휘자%진오앙%엄신환
N-烷基化%原位液相加氢%芳香硝基化合物%N-烷基芳胺%铂锡双金属催化剂
N-烷基化%原位液相加氫%芳香硝基化閤物%N-烷基芳胺%鉑錫雙金屬催化劑
N-완기화%원위액상가경%방향초기화합물%N-완기방알%박석쌍금속최화제
N-alkylation%In situliquid hydrogenation%Nitroaromatic%N-alkyl aniline%Pt-Sn bimetallic catalyst
采用吸附法制备了组合型Pt3Sn/AI2O3双金属催化剂,将该催化剂用于芳香硝基化合物原位液相加氢-锅法合成N-烷基芳胺.研究表明,在503 K,空速为7.5h-1,水体积分数为5％时,1％(质量分数)Pt3Sn/Al2O3催化剂具有较高的催化性能,硝基苯的转化率为100％,N-乙基苯胺和N,N-二乙基苯胺的总选择性为98.2％.同时,该催化剂对原位液相加氢烷基化反应具有一定普适性,本文研究的14种芳香硝基化合物与低级脂肪醇反应,均具有较高的N-烷基化产率.
採用吸附法製備瞭組閤型Pt3Sn/AI2O3雙金屬催化劑,將該催化劑用于芳香硝基化閤物原位液相加氫-鍋法閤成N-烷基芳胺.研究錶明,在503 K,空速為7.5h-1,水體積分數為5％時,1％(質量分數)Pt3Sn/Al2O3催化劑具有較高的催化性能,硝基苯的轉化率為100％,N-乙基苯胺和N,N-二乙基苯胺的總選擇性為98.2％.同時,該催化劑對原位液相加氫烷基化反應具有一定普適性,本文研究的14種芳香硝基化閤物與低級脂肪醇反應,均具有較高的N-烷基化產率.
채용흡부법제비료조합형Pt3Sn/AI2O3쌍금속최화제,장해최화제용우방향초기화합물원위액상가경-과법합성N-완기방알.연구표명,재503 K,공속위7.5h-1,수체적분수위5％시,1％(질량분수)Pt3Sn/Al2O3최화제구유교고적최화성능,초기분적전화솔위100％,N-을기분알화N,N-이을기분알적총선택성위98.2％.동시,해최화제대원위액상가경완기화반응구유일정보괄성,본문연구적14충방향초기화합물여저급지방순반응,균구유교고적N-완기화산솔.
N-alkyl anilines were obtained from nitroaromatics by a one-pot method using assembled Pt3Sn/AI2O3 catalyst for heterogeneous in situ hydrogenation in a continuous-flow fixed-bed reactor.At the optimum reaction conditions (503 K,liquid hourly space velocity (LHSV) of 7.5 h-1,5％ (volume fraction)water,1％ (mass fraction) Pt3Sn/AI2O3 catalyst),nitrobenzene conversion was 100％,with a total N-ethyl and N,N-diethyl aniline yield of 98.2％.Moreover,the Pt3Sn/AI2O3 catalyst had a great conjoint effect for all in situ hydrogenation reactions for N-alkylation.High yields of N-alkylation products were obtained in aliphatic alcohol/water systems for 14 selected nitroaromatics.
