Selective purification of mono-terpenes for removal of oxygen containing species
US7727401B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2004 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Feb 3, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D15/203
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for purifying monoterpenes, including the steps of: providing a monoterpene comprising alpha terpinene of about 90% or greater purity and comprising an oxygen-containing impurity compound selected from the group consisting of 1,8-cineole, 1,4,-cineole, and mixtures thereof; providing an activated silica gel preparative chromatographic column; contacting the monoterpene with the column, wherein the oxygen-containing impurity compounds are retained on the column; recovering monterpenes depleted of oxygen-containing impurity compounds from the column by applying a pressure above atmospheric from a gas source without the use of a solvent; and removing the oxygen-containing impurity compounds by contacting the column with an alcohol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.