Method for preparing 1,3-propanediol with high space-time yield and high concentration
US12365641B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2024 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Sep 23, 2044 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/3768
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for preparing 1,3-propanediol with a high space-time yield, in which A methyl 3-hydroxypropionate solution is pumped into a tubular fixed-bed reactor loaded with a surface modifier-coated nano-Cu-based catalyst for continuous hydrogenation to obtain a reaction mixture, where the catalyst includes Cu as active component, a metal oxide XOn/2 as additive and a SiO2—SnO2 composite carrier. The reaction mixture is subjected to rectification to separate light components from heavy components, where the light components include methanol, n-propanol, methyl propionate, methyl 3-hydroxypropionate and 1,3-propanediol, and the heavy components include 1,3-propanediol mono-propionate and 1,3-propanediol mono-3-hydroxypropionate. The heavy components are fed back to the tubular fixed-bed reactor for secondary hydrogenation, and the light components are separated to obtain 1,3-propanediol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.