US4018752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrafiltration process for the recovery of proteins from milk
Assignee: Nestec SA
•
Filing: 1974-07-25
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Granted: 1977-04-19
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Expires: 1994-07-25
Abstract
Abstract A process for isolating a protein fraction from an aqueous solution or suspension containing the said fraction in admixture with other substances, which comprises subjecting the aqueous solution or suspension to ultrafiltration to obtain a retentate, diluting the retentate, subjecting the diluted retentate to at least one further ultrafiltration treatment and recovering a retentate containing the protein fraction.
Inventors
- 👤 Marcel Buhler
- 👤 Hans-Ueli Bohren
- 👤 Theodore Hodel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/20; A23J1/205; A23C; A23C19/00; A23C19/02; A23C19/028; A23C19/0285; A23C9/00; A23C9/14; A23C9/142; A23C9/1422; A23V; A23V2002/00; Y; Y10; Y10S; Y10S426/00; Y10S426/804; Y10S530/00; Y10S530/827; Y10S530/832; Y10S530/833
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
81 words
A process for isolating a protein fraction from milk containing said fraction in admixture with other substances, which comprises subjecting said milk to ultrafiltration to obtain a first retentate and a permeate, diluting said retentate with a volume of acidic aqueous liquid having a pH between 3 and 5, said volume being equal to or greater than that of said permeate, subjecting the diluted retentate to at least one further ultrafiltration treatment and recovering a second retentate containing said protein fraction.
Claim 2
Dependent Claim
81 words
A process for isolating a protein fraction from milk containing said fraction in admixture with other substances, which comprises subjecting said milk to ultrafiltration to obtain a first retentate and a permeate, diluting said retentate with a volume of acidic aqueous liquid having a pH between 3 and 5, said volume being equal to or greater than that of said permeate, subjecting the diluted retentate to at least one further ultrafiltration treatment and recovering a second retentate containing said protein fraction.
Claim 3
Dependent Claim
20 words
A process as claimed in claim 1, wherein the milk has a non-fat solids content of from 5 to 30%.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 1, wherein the milk is skimmed milk or acidified milk.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 2, wherein the milk has a fats content of 0 to 5%.
Claim 6
Dependent Claim
25 words
A process as claimed in claim 1, wherein the ultrafiltration treatments are carried out at a temperature in the range from 5 to 30° C.
Claim 7
Dependent Claim
24 words
A process as claimed in claim 1, wherein the ultrafiltration treatments are carried out under an initial pressure of from 1 to 20 atms.
Claim 8
Dependent Claim
32 words
A process as claimed in claim 1, wherein the retentate is diluted by the addition of a volume of an aqueous phase substantially equal to the volume of permeate produced during ultrafiltration.
Claim 9
Dependent Claim
14 words
A process as claimed in claim 1, wherein the aqueous liquid is acidified water.
Claim 10
Dependent Claim
83 words
A process for isolating a protein fraction from acidic milk containing said fraction in admixture with other substances, which comprises subjecting said acidic milk to ultrafiltration to obtain a first retentate and a permeate, diluting said retentate with a volume of acidified water having a pH of from 5 to 3, said volume being equal to or greater than that of said permeate, subjecting the diluted retentate to at least one further ultrafiltration treatment and recovering a second retentate containing said protein fraction.
Claim 11
Dependent Claim
83 words
A process for isolating a protein fraction from acidic milk containing said fraction in admixture with other substances, which comprises subjecting said acidic milk to ultrafiltration to obtain a first retentate and a permeate, diluting said retentate with a volume of acidified water having a pH of from 5 to 3, said volume being equal to or greater than that of said permeate, subjecting the diluted retentate to at least one further ultrafiltration treatment and recovering a second retentate containing said protein fraction.
References Cited (Backward Citations)
US3707770A
Cited
US3814745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |