Patent US3862901A successfully refreshed from Google Patents.
US3862901A
Expired / Lapsed
US
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Method of recovering organic material from aqueous solutions thereof
Assignee: Svenska Cellulosa AB
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Filing: 1971-11-18
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Granted: 1975-01-28
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Expires: 1991-11-18
Abstract
Abstract The invention comprises a method of isolating at least some of the high molecular weight organic compounds containing basic groups such as proteins, polypeptides, bacteria, virus and enzymes, from solutions containing them, by the steps of bringing the solution into contact with a lignocellulosic material which has been sulphonated to such an extent that its ion exchange capacity reaches to at least 0.15 milliequivalents per gram, and separating the solution from the sulphonated lignocellulosic material.
Inventors
- 👤 Bengt Axel Wennerblom
- 👤 Sven Erik Jorgensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/286; B; B01; B01J; B01J47/00; B01J47/014; A; A23; A23V; A23V2002/00; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/814; Y10S530/00; Y10S530/82; Y10S530/825; Y10S530/826; Y10S530/827; Y10S530/832; Y10S530/833; Y10S530/859
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A METHOD OF PURIFYING A WASTE WATER CONTAINING A HIGH MOLECULAR ORGANIC COMPOUND WITH A BASIC GROUP OF THE GROUP CONSISTING OF PROTEINS, POLYPEPTIDES, BACTERIA, VIRUS AND ENZYMES, WHICH COMPRISES BRINGING THE WASTE WATER, AT A PH LESS THAN APPROXIMATELY 8, INTO CONTACT WITH A SULPHITE PULP RESULTING FROM SULPHITE DIGESTION OF LIGNOCELLULOSIC MATERIAL WHICH HAS BEEN SULPHONATED TO AN EXTENT SUCH THAT ITS ION EXCHANGE CAPACITY IS AT LEAST 0.15 MEQU/GR AND THEREAFTER SEPARATING THE SO-TREATED WATER FROM SAID MATERIAL.
Claim 2
Independent Claim
81 words
A METHOD OF PURIFYING A WASTE WATER CONTAINING A HIGH MOLECULAR ORGANIC COMPOUND WITH A BASIC GROUP OF THE GROUP CONSISTING OF PROTEINS, POLYPEPTIDES, BACTERIA, VIRUS AND ENZYMES, WHICH COMPRISES BRINGING THE WASTE WATER, AT A PH LESS THAN APPROXIMATELY 8, INTO CONTACT WITH A SULPHITE PULP RESULTING FROM SULPHITE DIGESTION OF LIGNOCELLULOSIC MATERIAL WHICH HAS BEEN SULPHONATED TO AN EXTENT SUCH THAT ITS ION EXCHANGE CAPACITY IS AT LEAST 0.15 MEQU/GR AND THEREAFTER SEPARATING THE SO-TREATED WATER FROM SAID MATERIAL.
Claim 3
Dependent Claim
24 words
A method according to claim 1, wherein the sulphite pulp is formed into granule-like fiber agglomerates prior to being contacted with the waste water.
Claim 4
Dependent Claim
21 words
A method according to claim 1, wherein the waste water is caused to flow through a column containing said sulphite pulp.
Claim 5
Dependent Claim
110 words
In the purification of waste water containing proteinaceous material, a method comprising the combination of steps of treating the waste water in a first step with precipitating agents to remove from said liquid by precipitation and sedimentation the major part of the impurities contained therein, and in a second step bringing the thus partially cleansed water into contact with a sulphite pulp resulting from sulphite digestion of lignocellulosic material which has been sulphonated to an extent such that its ion exchange capacity of at least 0.15 mequ/gr, at a pH lower than 8, to remove residual proteinaceous material, such as residual proteins, polypeptides, bacteria, virus and enzymes, from said water.
Claim 6
Dependent Claim
110 words
In the purification of waste water containing proteinaceous material, a method comprising the combination of steps of treating the waste water in a first step with precipitating agents to remove from said liquid by precipitation and sedimentation the major part of the impurities contained therein, and in a second step bringing the thus partially cleansed water into contact with a sulphite pulp resulting from sulphite digestion of lignocellulosic material which has been sulphonated to an extent such that its ion exchange capacity of at least 0.15 mequ/gr, at a pH lower than 8, to remove residual proteinaceous material, such as residual proteins, polypeptides, bacteria, virus and enzymes, from said water.
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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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |