Method for producing polyoxymethylene dimethyl ethers
US9266990B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 21, 2015 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Jan 21, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2/34
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for producing polyoxymethylene dimethyl ethers using fluidized bed reactor is provided. The fluidized bed reactor gives high conversion of feedstock during synthesis of polyoxymethylene dimethyl ethers. The product separation process includes pre-rectification, extractive rectification and vacuum rectification in series. In the pre-rectification process, the side-draw fraction PODE2 is recycled into the fluidized bed reactor, thus product distribution and selectivity to target components in the reactor can be improved. The extractive rectification process realizes coupling of neutralization, extraction, recovery of unconverted feedstock and products separation, thus significantly simplifies the process. The method for preparation of polyoxymethylene dimethyl ethers in this invention is simple, and has high conversion of feedstock, low energy cost and high selectivity to products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.