Adsorption separation of sterols from tall oil pitch with carbon adsorbent
US4849112A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Dec 11, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D15/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An adsorptive separation process for separating sterols from a tall oil feed mixture, which process comprises contacting the feed mixture with an adsorbent comprising a carbon sieve having average pore diameters greater than about 20 .ANG., especially 30-90 .ANG., and a surface area greater than about 300 m.sup.2 /g, especially 700-1100 m.sup.2 /g, and, preferably, a carbonaceous pyropolymer or carbonized resin, selectively adsorbing substantially all of the sterols to be separated to the substantial exclusion of the other components and thereafter recovering high purity sterols. A desorption step is used to desorb the adsorbed sterols with an aromatic liquid hydrocarbons, e.g., toluene or chlorobenzene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.