当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2014年
8期
1417-1420
,共4页
苯甲醛1,2-丙二醇缩醛%Y-β复合分子筛负载磷钨酸%缩合反应
苯甲醛1,2-丙二醇縮醛%Y-β複閤分子篩負載燐鎢痠%縮閤反應
분갑철1,2-병이순축철%Y-β복합분자사부재린오산%축합반응
Benzylaldehyde 1,2-propanediol acetal%H3PWl2O40/Y-β%Acetalization
采用Y-β复合分子筛负载H3PWl2O40为催化剂，对苯甲醛与1,2-丙二醇发生缩合反应合成苯甲醛1,2-丙二醇缩醛进行了研究，考察了催化剂用量、醇醛摩尔比、反应时间、带水剂用量及催化剂重复使用次数等因素对收率的影响。结果表明，该催化剂具有催化性能高，易回收并有较好的重复使用性能等优势。最佳反应条件为：苯甲醛0.1 mol，醇醛摩尔比1.2，催化剂用量0.6 g，带水剂环己烷用量为10 mL，反应40 min后收率为92.3％。
採用Y-β複閤分子篩負載H3PWl2O40為催化劑，對苯甲醛與1,2-丙二醇髮生縮閤反應閤成苯甲醛1,2-丙二醇縮醛進行瞭研究，攷察瞭催化劑用量、醇醛摩爾比、反應時間、帶水劑用量及催化劑重複使用次數等因素對收率的影響。結果錶明，該催化劑具有催化性能高，易迴收併有較好的重複使用性能等優勢。最佳反應條件為：苯甲醛0.1 mol，醇醛摩爾比1.2，催化劑用量0.6 g，帶水劑環己烷用量為10 mL，反應40 min後收率為92.3％。
채용Y-β복합분자사부재H3PWl2O40위최화제，대분갑철여1,2-병이순발생축합반응합성분갑철1,2-병이순축철진행료연구，고찰료최화제용량、순철마이비、반응시간、대수제용량급최화제중복사용차수등인소대수솔적영향。결과표명，해최화제구유최화성능고，역회수병유교호적중복사용성능등우세。최가반응조건위：분갑철0.1 mol，순철마이비1.2，최화제용량0.6 g，대수제배기완용량위10 mL，반응40 min후수솔위92.3％。
Synthesis of benzylaldehyde 1,2-propanediol acetal by acetalization of benzylaldehyde with 1,2-propanediol catalyzed by H3PWl2O40/Y-β was studied. The effect of different factors, such as amount of catalysts, ratio of 1,2-propanediol to benzylaldehyde, reaction time,amount of water-carrying agent and repeated times of the catalyst on the yield of benzylaldehyde 1,2-propanediol acetal was investigated. The results show that the catalyst has many advantages, such as high catalytic activity, easy to recycle and good reusability. The best reaction conditions are as follows:amount of benzylaldehyde 0.1 mol, ratio of 1,2-propanediol to benzylaldehyde 1.2,amount of cyclohexane as water-carrying agent 10 mL, catalyst dosage 0.6 g, reaction time 40 min; Under above conditions, the yield of benzylaldehyde 1,2-propanediol acetal can reach to 92.3%.
