闽江学院学报
閩江學院學報
민강학원학보
JOURNAL OF MINJIANG UNIVERSITY
2012年
2期
112-115,120
,共5页
稀土固体超强酸%催化合成%柠檬酸三戊酯
稀土固體超彊痠%催化閤成%檸檬痠三戊酯
희토고체초강산%최화합성%저몽산삼무지
rare-earth solid excess strong acid%catalytic synthesis%Tri( n-amyl )citrate
以柠檬酸和正戊醇为原料，采用自制的稀土固体超强酸SO4^2-／TiO2／La^3＋、SO4^2-／SnO2／La^3＋、SO4^2-／ZrO2／La^3＋、SO4^2-／Fe2O3／La^3＋为催化剂催化合成增塑剂柠檬酸三戊酯．通过单因素和正交实验考察了各反应因素对反应酯化率的影响．实验表明：当柠檬酸与正戊醇摩尔比为1：4．0、S04^2-／TiO2／La^3＋催化剂用量为柠檬酸总量的4％、催化荆活化温度为250℃、反应温度140-150℃和反应时间3．0h条件下，柠檬酸三戊酯的酯化率可达到97．3％，催化剂重复使用多次，活性未见明显降低．产品经红外光谱定性分析，纯度经气相色谱分析大于99％．
以檸檬痠和正戊醇為原料，採用自製的稀土固體超彊痠SO4^2-／TiO2／La^3＋、SO4^2-／SnO2／La^3＋、SO4^2-／ZrO2／La^3＋、SO4^2-／Fe2O3／La^3＋為催化劑催化閤成增塑劑檸檬痠三戊酯．通過單因素和正交實驗攷察瞭各反應因素對反應酯化率的影響．實驗錶明：噹檸檬痠與正戊醇摩爾比為1：4．0、S04^2-／TiO2／La^3＋催化劑用量為檸檬痠總量的4％、催化荊活化溫度為250℃、反應溫度140-150℃和反應時間3．0h條件下，檸檬痠三戊酯的酯化率可達到97．3％，催化劑重複使用多次，活性未見明顯降低．產品經紅外光譜定性分析，純度經氣相色譜分析大于99％．
이저몽산화정무순위원료，채용자제적희토고체초강산SO4^2-／TiO2／La^3＋、SO4^2-／SnO2／La^3＋、SO4^2-／ZrO2／La^3＋、SO4^2-／Fe2O3／La^3＋위최화제최화합성증소제저몽산삼무지．통과단인소화정교실험고찰료각반응인소대반응지화솔적영향．실험표명：당저몽산여정무순마이비위1：4．0、S04^2-／TiO2／La^3＋최화제용량위저몽산총량적4％、최화형활화온도위250℃、반응온도140-150℃화반응시간3．0h조건하，저몽산삼무지적지화솔가체도97．3％，최화제중복사용다차，활성미견명현강저．산품경홍외광보정성분석，순도경기상색보분석대우99％．
Tri （n-amyl） citrate was synthesized from citric acid and n-amyl alcohol using selfCmade rareearth solid excess strong acid SO4^2-/TiO2/La^3＋、SO4^2-/SnO2/La^3＋、SO4^2-/ZrO2/La^3＋、SO4^2-/Fe2O3/La^3＋. Effects of different factors on the reaction were investigated by single-factor and orthogonal experiment. Experiment shows ： when file ration of citric acid to n-amyl alcohol molar is 1 ： 4. 0, the amount of catalyst is 4% of the total citric acid,the catalyst activation temperature is 250 ℃, the reaction temperature is 140 - 150 ℃ ,and the reaction time is 3 h ,Tri（ n-amyl ） citrate yield of 97.3% was attained. When the catalyst was repetitively used, the active didn＇t reduce obviously. The product was identified by IR and the purity determined by GC is over 99%.
