广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2014年
19期
34-36
,共3页
固体酸催化剂%磺化硅胶%催化%乙酸正丙酯
固體痠催化劑%磺化硅膠%催化%乙痠正丙酯
고체산최화제%광화규효%최화%을산정병지
solid acid catalyst%silica sulfuric acid%catalyze%normal propyl acetate
磺化硅胶是一种以化学键键合而成,性能稳定的固体酸催化剂。实验以磺化硅胶为催化剂,乙酸和正丙醇为原料合成了乙酸正丙酯。以单因素法分别考察了酸醇摩尔比、反应时间、催化剂用量以及催化剂的重复使用次数对酯化率的影响。最佳合成条件为: n(乙酸):n(正丙醇)=1:1,回流时间为60 min,催化剂用量为反应物总质量的1.2%,反应的酯化率可达93.4%,催化剂重复使用10次后的酯化率仍达81.1%。研究结果表明:磺化硅胶对乙酸正丙酯的合成具有良好的催化活性。
磺化硅膠是一種以化學鍵鍵閤而成,性能穩定的固體痠催化劑。實驗以磺化硅膠為催化劑,乙痠和正丙醇為原料閤成瞭乙痠正丙酯。以單因素法分彆攷察瞭痠醇摩爾比、反應時間、催化劑用量以及催化劑的重複使用次數對酯化率的影響。最佳閤成條件為: n(乙痠):n(正丙醇)=1:1,迴流時間為60 min,催化劑用量為反應物總質量的1.2%,反應的酯化率可達93.4%,催化劑重複使用10次後的酯化率仍達81.1%。研究結果錶明:磺化硅膠對乙痠正丙酯的閤成具有良好的催化活性。
광화규효시일충이화학건건합이성,성능은정적고체산최화제。실험이광화규효위최화제,을산화정병순위원료합성료을산정병지。이단인소법분별고찰료산순마이비、반응시간、최화제용량이급최화제적중복사용차수대지화솔적영향。최가합성조건위: n(을산):n(정병순)=1:1,회류시간위60 min,최화제용량위반응물총질량적1.2%,반응적지화솔가체93.4%,최화제중복사용10차후적지화솔잉체81.1%。연구결과표명:광화규효대을산정병지적합성구유량호적최화활성。
Silica sulfuric acid ( SSA) is a kind of solid acid catalyst with chemical bonding and stable performance.Normal propyl acetate was synthesized from n -propyl alcohol and glacial acetic acid with SSA as catalyst.The optimal reaction conditions were as follows:when the molar ratio of acetic to propyl alcohol was 1:1 , and the reaction time was 60 min, the quality of the catalyst to total material was 1.2%, the esterification rate was up to 93.4%.the catalyst was reused after 10 timeed , the esterification rate was still up to 81.8%.SSA showed good catalytic activity for the synthesis of normal propyl acetate.