Method for synthesizing polyoxymethylene dimethyl ethers catalyzed by an ionic liquid
US8816131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2011 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Nov 11, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
It is related to a method for preparing polyoxymethylene dimethyl ethers by a continuous acetalation reaction of trioxymethylene and methanol or methylal catalyzed by an ionic liquid. The processing apparatus used in the method includes a reaction zone, a separation zone, a catalyst regeneration zone and a product dehydration zone. A manner of circulating tubular reaction is used, resulting in a high external heat exchange efficiency, a simple structure of design and a low investment. A film evaporator is used, realizing a rapid separation and recycling of the light component, with a high separation efficiency. The separation of the catalyst solution from the crude product is simple, thereby realizing the regeneration and recycling of the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.