The isopentyl lactate had the yield of 93 8% when amount of Mo/HZSM 5(38) zeolite was 1 g/mol·Lactic acid,acid/alcohol molar ratio of reactant was 1∶1 2 and reaction temperature was 150℃.
当 Mo/ H Z S M5 (38) 分子筛催化剂用量为1 g/m ol乳酸, 乳酸与异戊醇的摩尔比为1v12, 控制反应温度为150℃时, 乳酸异戊酯的产率可达938% 。
Isopentyl lactate was synthesis by 0.1mol lactic acid with 0.2mol isopentyl alcohol refluxing and water segregating for 60min, by using 1.0g (0.002mol) ammonium ferric sulfate dodechydrate as catalyst, the yield of the ester could reach 90%.
The optimum conditions are as follows: molar ratio of lactic acid to isopentyl alcohol is 1 : 2.0, reaction time of reflux 1 h, mass of catalyst 5 % of lactic acid. The yield of isopentyl lactate reaches 93 % .
In the experiment described in the paper, the catalyt of polyvinyle chloride - ferric chloride (PVCFecl3)was used in the synthesis of isopentyl lactate. In its presence, isopentyl alcohol reacted with lactic acid and then isopentyl lactate formed. When the mixture of 0. 1mol lactic acid, 0.4mol isopenilyl alcohol and 0.75g catalyst were heated for 60 minutes at the refluxing temperature, the product was 95% and the catalyst could be reused.
Isopentyl Lactate was catalytic synthesized over HZSM 5(38)、Mo/HZSM 5(38)、Fe/HZSM 5(38) zeolites. The Mo/HZSM 5(38) zeolite had the best catalytic performance.The isopentyl lactate had the yield of 93 8% when amount of Mo/HZSM 5(38) zeolite was 1 g/mol·Lactic acid,acid/alcohol molar ratio of reactant was 1∶1 2 and reaction temperature was 150℃.The catalyst is reclaimable and utilizable repeatedly,the yield of the isopentyl lactate could maintain 93% within 6 hours ...
For the Mo/HZSM5 zeolites with different Mo loading, the state of Mo and acidity were studied by XRD,IR,NH 3TPD and BET methods.The Mo/HZSM5 zeolites were used to catalytic synthesis isopentyl propionate and isopentyl lactate in liquid phase.The results indicate that the state of Mo on Mo/HZSM5 zeolites is mainly present as microcrystalline MoO 3.With increasing Mo loading,the total number of acid sites decreases and the number of L acid sites increases. The Mo/HZSM5 zeolites has higher ...