当前位置: X-MOL 学术Green Synth. Catal. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
1,5-Pentanediol production from 3,4-dihydro-2H-pyran and acetic acid via successive reactions of esterification and hydrogenation
Green Synthesis and Catalysis ( IF 8.2 ) Pub Date : 2024-02-24 , DOI: 10.1016/j.gresc.2024.02.005
Siyuan Zhao , Hong Du , Qi Fang , Yuying Li , Lei Wu , Xiumei Liu , Feng Wang

1,5-Pentanediol as an important chemical intermediate is commonly used for the manufacture of polyesters and polyurethanes. A novel process was developed for the production of bio-based 1,5-pentanediol (1,5-PDO) from 3,4-dihydro-2H-pyran (DHP) and acetic acid (AA) in this work. The esterification of DHP and AA achieved a 59.8% DHP conversion and 91.2% tetrahydropyran-2-yl acetate selectivity (THPOAc) at 373 ​K for 1 ​h and DHP/AA molar ratio of 1 without catalyst. Then the 1,5-PDO with selectivity of 54.5% was obtained from THPOAc via hydrogenation over Cu/Zn8/Al catalyst under the conditions of 453 ​K and 50 ​bar. The higher dispersion of Cu nanoparticles, the larger surface area of metallic Cu, the higher amount of Cu+ active sites and the lower acidity of Cu/Zn8/Al catalyst were beneficial for the hydrogenation of THPOAc to 1,5-PDO.

中文翻译:


由 3,4-二氢-2H-吡喃和乙酸通过酯化和氢化的连续反应生成 1,5-戊二醇



1,5-戊二醇作为重要的化学中间体,常用于制造聚酯和聚氨酯。在本研究中,开发了一种从 3,4-二氢-2 H-吡喃 (DHP) 和乙酸 (AA) 生产生物基 1,5-戊二醇 (1,5-PDO) 的新工艺。DHP 和 AA 的酯化反应在 373 K 下实现了 59.8% 的 DHP 转化率和 91.2% 的四氢吡喃-2-基乙酸酯选择性 (THPOAc),持续 1 h,DHP/AA 摩尔比为 1,无催化剂。然后在 453 K 和 50 bar 的条件下,通过 Cu/Zn 8/Al 催化剂加氢从 THPOAc 获得选择性为 54.5 % 的 1,5-PDO。Cu 纳米颗粒的较高分散性、金属 Cu 的表面积较大、Cu+ 活性位点的含量较高以及 Cu/Zn8/Al 催化剂的酸度较低,有利于 THPOAc 加氢制 1,5-PDO。
更新日期:2024-02-24
down
wechat
bug