The reaction kinetics of dilute acetic acid with methanol using NKC-9 as catalyst was studied at temperatures of 308 K, 318 K, 323 K, 328 K. The kinetic model based on Langmuir-Hinshelwood rate model was derived and t...The reaction kinetics of dilute acetic acid with methanol using NKC-9 as catalyst was studied at temperatures of 308 K, 318 K, 323 K, 328 K. The kinetic model based on Langmuir-Hinshelwood rate model was derived and the activation energy was 6.13 × 10^4 kJ/kmol. The experiment of recovery of dilute acetic acid was conducted in a packed bed catalytic distillation column. The optireal process parameters and operational conditions determined to make up to 85.9% conversion of acetic acid are as follows：the height of catalyst bed is 1 100 mm, reflux ratio is 4： 1, and the ratio of methanol to acetic acid is 2： 1. The method can be used as a guide in industrial scale recovery of 15% 30% dilute acetic acid.展开更多
采用3A分子筛吸附脱水技术,以阳离子交换树脂NKC–9为催化剂,棕榈酸和甲醇为原料合成棕榈酸甲酯。考察了醇酸摩尔比、催化剂用量、反应时间等因素对酯化反应的影响,并测定了动力学数据。确定了最佳反应条件:n(甲醇)∶n(棕榈酸)=2.5∶1...采用3A分子筛吸附脱水技术,以阳离子交换树脂NKC–9为催化剂,棕榈酸和甲醇为原料合成棕榈酸甲酯。考察了醇酸摩尔比、催化剂用量、反应时间等因素对酯化反应的影响,并测定了动力学数据。确定了最佳反应条件:n(甲醇)∶n(棕榈酸)=2.5∶1、阳离子交换树脂NKC–9的用量为棕榈酸和甲醇总质量的8%、反应温度≤70℃、反应时间4 h。最佳反应条件下棕榈酸的转化率为92.95%;反应总级数为二级,表观活化能为64.50 k J/mol,指前因子为2.95×108 L/(mol·min)。展开更多
文摘The reaction kinetics of dilute acetic acid with methanol using NKC-9 as catalyst was studied at temperatures of 308 K, 318 K, 323 K, 328 K. The kinetic model based on Langmuir-Hinshelwood rate model was derived and the activation energy was 6.13 × 10^4 kJ/kmol. The experiment of recovery of dilute acetic acid was conducted in a packed bed catalytic distillation column. The optireal process parameters and operational conditions determined to make up to 85.9% conversion of acetic acid are as follows：the height of catalyst bed is 1 100 mm, reflux ratio is 4： 1, and the ratio of methanol to acetic acid is 2： 1. The method can be used as a guide in industrial scale recovery of 15% 30% dilute acetic acid.
文摘采用3A分子筛吸附脱水技术,以阳离子交换树脂NKC–9为催化剂,棕榈酸和甲醇为原料合成棕榈酸甲酯。考察了醇酸摩尔比、催化剂用量、反应时间等因素对酯化反应的影响,并测定了动力学数据。确定了最佳反应条件:n(甲醇)∶n(棕榈酸)=2.5∶1、阳离子交换树脂NKC–9的用量为棕榈酸和甲醇总质量的8%、反应温度≤70℃、反应时间4 h。最佳反应条件下棕榈酸的转化率为92.95%;反应总级数为二级,表观活化能为64.50 k J/mol,指前因子为2.95×108 L/(mol·min)。
