CAJ | 학술논문

以丁二酸和正辛醇为原料、环境友好型磷钨杂多酸为催化剂、甲苯为带水剂,合成了丁二酸二辛酯.采用均匀设计法设计实验,考察了醇/酸摩尔比、催化剂用量、带水剂用量和反应时间对丁二酸酯化率的影响.经单因素实验优化得到的最佳工艺条件:醇/酸摩尔比3.1,催化剂和带水剂用量分别为酸质量的1.2%和70%,反应时间3 h.在较佳工艺条件下,丁二酸酯化率达99.27%.同时建立了该酯化反应的表观动力学模型,得到了相应的反应速率方程.
이정이산화정신순위원료、배경우호형린오잡다산위최화제、갑분위대수제,합성료정이산이신지.채용균균설계법설계실험,고찰료순/산마이비、최화제용량、대수제용량화반응시간대정이산지화솔적영향.경단인소실험우화득도적최가공예조건:순/산마이비3.1,최화제화대수제용량분별위산질량적1.2%화70%,반응시간3 h.재교가공예조건하,정이산지화솔체99.27%.동시건립료해지화반응적표관동역학모형,득도료상응적반응속솔방정.
Dioctyl succinate was synthesized from succinic acid and n-octanol, by using environment-friendly phosphotungstic acid as catalyst and toluene as azeotropic agent. Effects of molar ratio of n-octanol to succinic acid, amounts of catalyst and azeotropic agent and reaction time on the esterification rate of succinic acid were investigated according to uniform design. The optimal reaction conditions optimized by single-factor experiment were that the molar ratio of alcohol to acid was 3.1, the amounts of catalyst and azeotropic agent were 1.2% and 70% by mass of acid respectively, and reaction time was 3 h. Under these conditions, the esterification rate of succinic acid could reach 99. 27%. At the same time, the apparent kinetics model for esterification of succinic acid was established, and the equation of reaction rate was obtained.