Close-coupled process for improving the stability of soybean oil
US4816189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1986 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Aug 7, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11B3/001
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A close-coupled method of treating unrefined, unbleached soybean oil to produce a stable edible frying oil. The close-coupled process involves performing a series of steps to refine and bleach unrefined, unbleached soybean oil in a continuous sequence without intermediate storage and without substantial exposure to oxygen in the air which can lead to oxidation of heated oil, as follows: treating unrefined, unbleached soybean oil with a caustic agent; heating and water washing the treated soybean oil; degassing the soybean oil to remove a substantial portion of any oxygen and water entrained in the oil; dispersing into the oil a minor amount of finely divided, activated metallic salts and oxides including bleaching earths, clays, etc.; and heating the resulting dispersion in a carbon dioxide atmosphere. The treated oil is then degassed to remove entrained carbon dioxide, filtered to remove particulates and then cooled to provide a refined, bleached soybean oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.