US4622303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoamers for yeast fermentation
Assignee: Henkel AG and Co KGaA
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Filing: 1985-01-29
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Granted: 1986-11-11
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Expires: 2005-01-29
Abstract
Abstract Troublesome foaming in the fermentation of yeast is suppressed by the addition of polyglycol ethers which are derived from saturated and monounsaturated C 16 -C 18 fatty alcohols and which contain on an average of from 1 to 4 ethylene and/or propylene glycol ether groups. Preferred defoamers contain oleyl and cetyl alcohol residues in a ratio of from 3:1 to 1:1, and on average 2 ethylene glycol ether groups. The defoamers do not inhibit yeast growth or lead to premature softening and liquefaction of the compressed yeast.
Inventors
- 👤 Karl Schmid
- 👤 Joachim Schindler
- 👤 Adolf Asbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:23
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; C; C12; C12N; C12N1/00; C12N1/38; Y; Y10; Y10S; Y10S435/00; Y10S435/812
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
84 words
A method for defoaming an aqueous yeast fermentation broth comprising adding to such broth an effective quantity of polyglycol ethers of linear, primary, saturated and unsaturated C 16-18 alcohols containing an average of from 1 to 4 glycol ether groups which are ethylene glycol ether groups, propylene glycol ether groups, or a mixture of ethylene glycol ether and propylene glycol ether groups and wherein said polyglycol ethers contain from about 30 to about 80% by weight of oleyl alcohol component as the alcohol component.
Claim 2
Independent Claim
84 words
A method for defoaming an aqueous yeast fermentation broth comprising adding to such broth an effective quantity of polyglycol ethers of linear, primary, saturated and unsaturated C 16-18 alcohols containing an average of from 1 to 4 glycol ether groups which are ethylene glycol ether groups, propylene glycol ether groups, or a mixture of ethylene glycol ether and propylene glycol ether groups and wherein said polyglycol ethers contain from about 30 to about 80% by weight of oleyl alcohol component as the alcohol component.
Claim 3
Dependent Claim
23 words
A method in accordance with claim 1 wherein the polyglycol ethers contain an average of from 1 to 3 ethylene glycol ether groups.
Claim 4
Dependent Claim
23 words
A method in accordance with claim 2 wherein the polyglycol ethers contain an average of from 1 to 3 ethylene glycol ether groups.
Claim 5
Dependent Claim
25 words
A method in accordance with claim 1 wherein from about 0.005 to about 1 g/l of said polyglycol ethers are added to the fermentation broth.
Claim 6
Dependent Claim
25 words
A method in accordance with claim 4 wherein from about 0.01 to about 0.2 g/l of said polyglycol ethers are added to the fermentation broth.
Claim 7
Dependent Claim
51 words
A method in accordance with claim 1 wherein the alcohol component of the polyglycol ethers is a mixture of oleyl alcohol and cetyl alcohol components in a ratio by weight of from about 3:1 to about 1:1, and wherein the polyglycol ethers contain an average of 2 ethylene glycol ether groups.
Claim 8
Dependent Claim
78 words
A yeast fermentation broth which contains an effective foam inhibiting quantity of polyglycol ethers of linear, primary, saturated and unsaturated C 16-18 alcohols containing an average of from 1 to 4 glycol ether groups which are ethylene glycol ether groups, propylene glycol ether groups, or a mixture of ethylene glycol ether and propylene glycol ether groups and wherein said polyglycol ethers contain from about 30 to about 80% by weight of oleyl alcohol component as the alcohol component.
Claim 9
Dependent Claim
78 words
A yeast fermentation broth which contains an effective foam inhibiting quantity of polyglycol ethers of linear, primary, saturated and unsaturated C 16-18 alcohols containing an average of from 1 to 4 glycol ether groups which are ethylene glycol ether groups, propylene glycol ether groups, or a mixture of ethylene glycol ether and propylene glycol ether groups and wherein said polyglycol ethers contain from about 30 to about 80% by weight of oleyl alcohol component as the alcohol component.
Claim 10
Dependent Claim
24 words
A fermentation broth in accordance with claim 7 wherein the polyglycol ethers contain an average of from 1 to 3 ethylene glycol ether groups.
Claim 11
Dependent Claim
24 words
A fermentation broth in accordance with claim 8 wherein the polyglycol ethers contain an average of from 1 to 3 ethylene glycol ether groups.
Claim 12
Dependent Claim
26 words
A fermentation broth in accordance with claim 7 wherein from about 0.005 to about 1 g/l of said polyglycol ethers are present in the fermentation broth.
Claim 13
Dependent Claim
26 words
A fermentation broth in accordance with claim 10 wherein from about 0.01 to about 0.2 g/l of said polyglycol ethers are present in the fermentation broth.
Claim 14
Dependent Claim
52 words
A fermentation broth in accordance with claim 7 wherein the alcohol component of the polyglycol ethers is a mixture of oleyl alcohol and cetyl alcohol components in a ratio by weight of from about 3:1 to about 1:1, and wherein the polyglycol ethers contain an average of 2 ethylene glycol ether groups.
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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) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |