Method for preparing pure EPA and pure DHA

US6846942B2 · kind B2 · utility

Inventor

• David Rubin · San Diego, US

Key dates

• Filing date: May 20, 2003
• Grant date: Jan 25, 2005
• Expiry date: Jun 25, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11C1/005
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Pure DHA and pure EPA can be obtained from a mixture of EPA and DHA in a solution by forming salts of DHA and EPA which have different solubilities in the solvent, cooling the solution until the salt of EPA is formed, filtering the solution to recover the salt of EPA, and acidifying the EPA salt and the DHA salt to obtain pure EPA and pure DHA.