Lipid rich compositions, production of lipid rich compositions, production of fatty acid alkyl esters from heterogeneous lipid mixtures
US6855838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2003 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Jan 7, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11C3/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method for producing fatty acid alkyl esters, involving esterifying a material containing free fatty acids (FFA) with an alcohol and an inorganic acid catalyst to form a product containing fatty acid alkyl esters, wherein (i) the material contains at least about 40% FFA and is produced by reacting a feedstock with steam and sulfuric acid at a pH of about 1-about 2 or (ii) the material contains at least about 80% FFA and is produced by reacting a feedstock with steam and alkali at a pH of about 11-about 13 and further reacting the feedstock with steam and sulfuric acid at a pH of about 1-about 2. The feedstock may be selected from the oils or soapstocks of soy, coconut, corn, cotton, flax, palm, rapeseed/canola, safflower, sunflower; animal fats; waste greases; and mixtures thereof; or other fully or partially hydrolyzed preparations of such feedstocks. The present invention also relates to a method for producing a lipid rich composition containing at least about 80% FFA, the method involving reacting a feedstock with steam and alkali at a pH of about 11-about 13 and further reacting the feedstock with steam and sulfuric acid at a pH of about 1-abo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.