US4134857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of tannic or gallic acid to produce low beverage soluble iron content filter aid
Assignee: CELITE Corp A CORP OF DELAWARE
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Filing: 1977-02-07
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Granted: 1979-01-16
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Expires: 1997-02-07
Abstract
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.
Inventors
- 👤 Timothy G. Bradley
- 👤 Raymond L. McAdam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:53
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103; B01J20/106; B01D; B01D37/00; B01D37/02; B01J20/14; C; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C12H1/0408; Y; Y10; Y10S; Y10S502/00; Y10S502/519
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
36 words
A method for the reduction of the beverage soluble iron content of a filter aid comprising diatomite or perlite which comprises contacting the filter aid in granular form with tannic acid, gallic acid or mixtures thereof.
Claim 2
Independent Claim
36 words
A method for the reduction of the beverage soluble iron content of a filter aid comprising diatomite or perlite which comprises contacting the filter aid in granular form with tannic acid, gallic acid or mixtures thereof.
Claim 3
Dependent Claim
12 words
A method as in claim 1 wherein said filter aid comprises diatomite.
Claim 4
Dependent Claim
19 words
A method as in claim 2 wherein said tannic acid, gallic acid or mixture thereof is in aqueous solution.
Claim 5
Dependent Claim
20 words
A method as in claim 3 wherein said aqueous solution has a concentration of 1% to 20% acid by weight.
Claim 6
Dependent Claim
14 words
A method as in claim 3 wherein solution also contains a color control agent.
Claim 7
Dependent Claim
23 words
A method as in claim 5 wherein said color control agent is citric acid, sodium sulfite, potassium bromate or ethylene diamine tetraacetic acid.
Claim 8
Dependent Claim
16 words
A method as in claim 2 wherein said contacting comprises spraying the diatomite with the acid.
Claim 9
Dependent Claim
16 words
A method as in claim 2 wherein said contacting comprises washing the diatomite with the acid.
Claim 10
Dependent Claim
25 words
A method as in claim 2 wherein the acid is contacted in an amount of 0.1 to 1.5 gm-moles of acid per ton of diatomite.
Claim 11
Dependent Claim
25 words
A method as in claim 9 wherein the acid is contacted in an amount of 0.2 to 1.2 gm-moles of acid per ton of diatomite.
Claim 12
Dependent Claim
12 words
A method as in claim 2 wherein said acid comprises tannic acid.
Claim 13
Dependent Claim
12 words
A method as in claim 2 wherein said acid comprises gallic acid.
Claim 14
Dependent Claim
18 words
A method as in claim 2 wherein said acid comprises a mixture of tannic acid and gallic acid.
Claim 15
Dependent Claim
30 words
A filter aid comprising diatomite or perlite which has had its initial content of beverage soluble iron reduced by treating the diatomite in accordance with the method of claim 1.
Claim 16
Dependent Claim
29 words
A filter aid comprising granulated diatomite which has had its initial content of beverage soluble iron reduced by treating the diatomite in accordance with the method of claim 2.
Claim 17
Dependent Claim
29 words
A filter aid comprising granulated diatomite which has had its initial content of beverage soluble iron reduced by treating the diatomite in accordance with the method of claim 9.
Claim 18
Dependent Claim
29 words
A filter aid comprising granulated diatomite which has had its initial content of beverage soluble iron reduced by treating the diatomite in accordance with the method of claim 11.
Claim 19
Dependent Claim
29 words
A filter aid comprising granulated diatomite which has had its prior content of beverage soluble iron reduced by treating the diatomite in accordance with the method of claim 5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |