Process for making and using a low beverage soluble iron content adsorbent and composition made thereby
US6555151B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Jan 12, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/46
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An adsorbent removes certain undesirable components from beverages, such as beer, and has a low beverage soluble iron (BSI) content. These undesirable components include contaminants which cause chill haze. The adsorbent includes two components, a silica component and a polyphosphate sequestering agent component, such as sodium tripolyphosphate (STPP). The process for using the adsorbent involves first contacting a beverage with an adsorbent to adsorb at least a portion of the undesirable components then separating the adsorbent from the beverage. The adsorbent may be formed by one of two methods or a combination of both. The first method involves adding the polyphosphate sequestering agent to a reactant, such as a sodium or potassium silicate solution, prior to or during the gelation stage. A second method involves adding the polyphosphate sequestering agent to the water wash after a hydrogel is formed. The BSI of the adsorbent is substantially reduced using the first method, but the total iron content of the adsorbent appears to increase. The second method decreases both the BSI and the total iron content of the silica gel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.