Method for synthesizing biodiesel from renewable oils
US7473791B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2004 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Aug 23, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E50/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention provides a process for synthesizing biodiesel from renewable oils, comprising: carrying out a transesterification reaction, in the presence of an enzyme catalyst, between a low carbon fatty acid ester RCOOR′ as an acyl acceptor and a renewable oil, wherein the molar ratio of the low carbon fatty acid ester to the renewable oil is in the range of from 3:1 to 20:1, the transesterification reaction producing a glycerine tri-(low carbon) carboxylic ester by-product, and reacting the glycerine tri-(low carbon) carboxylic ester by-product with a low carbon alcohol R′OH to obtain the low carbon fatty acid ester, wherein the low carbon fatty acid ester is capable of being recycled in a further round of biodiesel synthesis, wherein R and R′ are independently selected from the group consisting of alkyls with one to four carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.