精细石油化工
精細石油化工
정세석유화공
SPECIALITY PETROCHEMICALS
2009年
5期
20-23
,共4页
杂多酸%二氧化硅%负载催化%乙酸苄酯%苯甲醇%冰乙酸
雜多痠%二氧化硅%負載催化%乙痠芐酯%苯甲醇%冰乙痠
잡다산%이양화규%부재최화%을산변지%분갑순%빙을산
heteropolyacid%silica%supported%catalysis%benzyl acetate%glacial acetic acid
采用苯甲醇和冰乙酸为原料,以PW_(12)/SiO_2为催化剂合成了乙酸苄酯,并通过红外光谱、XRD等对其结构进行了表征.最佳合成的工艺条件为:n(苯甲醇):n(冰乙酸)=1:2.5,回流温度,反应时间2 h,w(催化剂)=3.08%,W(甲苯)=15%.在此条件下,酯化率可达90%以上.
採用苯甲醇和冰乙痠為原料,以PW_(12)/SiO_2為催化劑閤成瞭乙痠芐酯,併通過紅外光譜、XRD等對其結構進行瞭錶徵.最佳閤成的工藝條件為:n(苯甲醇):n(冰乙痠)=1:2.5,迴流溫度,反應時間2 h,w(催化劑)=3.08%,W(甲苯)=15%.在此條件下,酯化率可達90%以上.
채용분갑순화빙을산위원료,이PW_(12)/SiO_2위최화제합성료을산변지,병통과홍외광보、XRD등대기결구진행료표정.최가합성적공예조건위:n(분갑순):n(빙을산)=1:2.5,회류온도,반응시간2 h,w(최화제)=3.08%,W(갑분)=15%.재차조건하,지화솔가체90%이상.
Benzyl acetate was synthesized from benzaldehyde and glacial acetic acid catalyzed by tugstophosphoric acid(PW_(12))supported over silica.Structure of the catalyst was characterized by BET,IRand XRD.The optimum conditions were found as follows:molar ratio of benzyl alcohol to acetic acid 1:2.5,3.08%catalyst based on all the reagents and reaction time 2.0 h at refluxing temperature.Under these conditions,the yield of benzyl acetate was up to 90%.The results showed that PW_(12)/SiO_2 is a good catalyst,having high reactivity under mild conditions.
