Filtration of vegetable based matter
US4202910A · kind A · utility
6Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1978 |
| Grant date | May 13, 1980 |
| Priority date | — |
| Expiry date | Jul 28, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12H1/0408
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A low beverage soluble iron content filter aid, especially diatomite, is disclosed, as is the method for its production, which comprises contacting the granular filter aid with tannic acid, gallic acid, or mixtures thereof, preferable in aqueous solution. Color control agents such as citric acid may also be present in the solution. The treated filter diatomite is useful in the filtration of vegetable based beverages, especially beer, wine, ale and fruit juices. The invention is also applicable to other filter aids which contain beverage soluble iron, such as perlite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.