Patent EP0062494A2 successfully refreshed from Google Patents.
EP0062494A2
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EP
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Method and device for separating mixed liquid components
Assignee: Kuraray Co Ltd
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Filing: 1982-03-31
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Granted: —
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Expires: 2002-03-31
Abstract
Abstract Two liquid components A and B of a mixed liquid are efficiently separated from each other by allowing the mixed liquid to permeate a membrane M A having a separation factor of more than 1 and removing component B from the liquid which has permeated membrane M A by means of a membrane M B having a separation factor of more than 1. Devices for carrying out this method are also disclosed.
Inventors
- 👤 Yoshinobu Tanaka
- 👤 Akira Mochizuki
- 👤 Yoshio Sato
- 👤 Hisashi Ogawara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 15:43
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/36; B01D61/362; B01D69/00; B01D69/12; B01D69/1212; B01D71/00; B01D71/02; B01D71/0213; B01D71/06; B01D71/28; B01D71/281; B01D71/40; B01D2319/00; B01D2319/02; B01D2319/022; B01D2325/00; B01D2325/38
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
83 words
A method of separating components of a mixed liquid, which comprises allowing a mixed liquid containing at least two components A and B which are different in polarity from each other to permeate a membrane M A having a separation factor of more than 1 and removing component B from the liquid that has permeated membrane M A by means of a membrane M B having a separation factor of more than 1, whereby components A and B are separated from each other.
Claim 2
Independent Claim
83 words
A method of separating components of a mixed liquid, which comprises allowing a mixed liquid containing at least two components A and B which are different in polarity from each other to permeate a membrane M A having a separation factor of more than 1 and removing component B from the liquid that has permeated membrane M A by means of a membrane M B having a separation factor of more than 1, whereby components A and B are separated from each other.
Claim 3
Dependent Claim
38 words
A method as claimed in Claim 1, in which the separation factor of membrane M A is in the range 1.5 to 100 and the separation factor of membrane M B is in the range 1.5 to 100.
Claim 4
Dependent Claim
36 words
A method as claimed in Claim 1 or 2, in which the separation factor of membrane M A is not less than 5 and the separation factor of membrane M B is not less than 5.
Claim 5
Dependent Claim
49 words
A method as claimed in Claim 1, 2 or 3, in which the flux L A through membrane M A is in the range 20 to 20,000 g/m 2 hr and the flux L B through membrane M B is in the range 20 to 20,000 g/m 2 .hr.
Claim 6
Independent Claim
29 words
A method as claimed in any preceding claim in which components A and B are separated from each other by pervaporation using membranes M A and M B .
Claim 7
Dependent Claim
31 words
A method as claimed in Claim 5, in which the mixed liquid containing at least two components A and B is allowed to permeate membrane M A after or with heating.
Claim 8
Dependent Claim
34 words
A method as claimed in Claim 5 or 6, in which the vaporized component that has permeated membrane M A is condensed and then allowed to permeate membrane M B after or with heating.
Claim 9
Independent Claim
53 words
A method as claimed in any preceding claim, in which the component that has permeated membrane M B is recycled in such a manner that the said component is blended with the said mixed liquid containing at least A and B and the resulting blend is allowed to permeate membrane M A .
Claim 10
Independent Claim
151 words
A method as claimed in any preceding claim, in which one of the membranes M A and M B has an active layer composed of a hydrophobic material that is either (i) a membrane of a hydrophobic material or (ii) a composite membrane composed of an active layer of hydrophobic material and a layer of hydrophilic material with which the mixed liquid to be treated is to come into contact, so as to allow permeation of the less polar component, and the other of membranes M A and M B has an active layer composed of a hydrophilic material that is either (i) a membrane of a hydrophilic material or (ii) a composite membrane composed of an active layer of hydrophilic material and a layer of hydrophobic material with which the mixed liquid to be treated is to come into contact, so as to allow permeation of a more polar component.
Claim 11
Dependent Claim
48 words
A method as claimed in Claim 9, in which, in the said one of membranes M A and M B , the hydrophobic material is silicone rubber and the layer of hydrophilic material, if any, is composed of a mixture of polyvinyl alcohol and an amide-group-containing hydrophilic polymer.
Claim 12
Dependent Claim
55 words
A method as claimed in Claim 9 or 10 in which, in the said other of the membranes M A and M B , the hydrophilic material is a cellulosic polymer, polyvinyl alcohol or a mixture of polyvinyl alcohol and an amide-group-containing polymer, and the hydrophobic material layer, if any, is composed of silicone rubber.
Claim 13
Dependent Claim
21 words
A method as claimed in Claim 10 or 11, in which the amide-group-containing polymer is polyvinylpyrrolidone, polyvinylpiperidone, polyvinylpyridone, polyvinyl-N-methylacetamide or poly-N,N-dialkylacrylamide.
Claim 14
Dependent Claim
113 words
A method as claimed in Claim 9, 10 or 11, in which each of membrane M A and membrane M B is a composite membrane composed of a hydrophobic material layer and a hydrophilic material layer, the mixed liquid coming into contact with the hydrophobic material layer of membrane M A and the mixed liquid that has permeated membrane M A coming into contact with the hydrophilic material layer of membrane M B , or the mixed liquid coming into contact with the hydrophilic material layer of membrane M A and the mixed liquid that has permeated membrane M A coming into contact with the hydrophobic material layer of membrane M B .
Claim 15
Independent Claim
184 words
A device for separating components of a mixed liquid that comprises (i) a first module (2) containing a membrane M A (3) having a separation factor of more than 1, the said module (2) having an inlet (1) for a mixed liquid containing at least two components A and B different in polarity from each other, an outlet (4) for the fraction that has not permeated membrane M A (3) (first nonpermeating fraction) and an outlet (5) for the fraction that has permeated membrane M A (3) (first permeating fraction), (ii) a second module (8) containing a membrane M B (9) having a separation factor of more than 1, the said module (8) having an inlet (7) for the first permeating fraction, an outlet (10) for the fraction that has not permeated membrane M B (second nonpermeating fraction) and an outlet (11) for the fraction that has permeated membrane M B (9) (second permeating fraction), and (iii) a passageway (6) connecting the first permeating fraction outlet (5) of the first module (2) with the first permeating fraction inlet (7) of the second module (8).
Claim 16
Independent Claim
184 words
A device for separating components of a mixed liquid that comprises (i) a first module (2) containing a membrane M A (3) having a separation factor of more than 1, the said module (2) having an inlet (1) for a mixed liquid containing at least two components A and B different in polarity from each other, an outlet (4) for the fraction that has not permeated membrane M A (3) (first nonpermeating fraction) and an outlet (5) for the fraction that has permeated membrane M A (3) (first permeating fraction), (ii) a second module (8) containing a membrane M B (9) having a separation factor of more than 1, the said module (8) having an inlet (7) for the first permeating fraction, an outlet (10) for the fraction that has not permeated membrane M B (second nonpermeating fraction) and an outlet (11) for the fraction that has permeated membrane M B (9) (second permeating fraction), and (iii) a passageway (6) connecting the first permeating fraction outlet (5) of the first module (2) with the first permeating fraction inlet (7) of the second module (8).
Claim 17
Dependent Claim
35 words
A device as claimed in Claim 14, in which a passageway (12) is provided for recycling the second permeating fraction to the initial stream of mixed liquid before its introduction into the first module (2).
Claim 18
Dependent Claim
49 words
A device as claimed in Claim 14 or 15, in which the passageway (8) connecting the first permeating fraction outlet (5) of the first module (2) with the first permeating fraction inlet (7) of the second module (8) has a means (15) for condensing the first vaporized permeating fraction.
Claim 19
Dependent Claim
44 words
A device according to Claim 16 including a means (19) for heating the mixed liquid before its introduction into the first module (2) and a means (17) for heating the condensate from the first permeating fraction before its introduction into the second module (18).
Claim 20
Dependent Claim
45 words
A device according to Claim 16 or 17 including a means (15) for condensing the second vaporized permeating fraction, and the passageway (12) recycles the condensate from the means (15) to the initial stream of mixed liquid before its introduction into the first module (2).
Claim 21
Independent Claim
94 words
A device as claimed in any one of Claims 14 to 18, in which there are two or more modules containing a membrane M A connected to each other so as to introduce nonpermeating fraction from.each module into the next module to obtain nonpermeating fractions enriched with B component from the preceding module, and there are two or more modules containing a membrane M B connected to each other so as to introduce nonpermeating fraction from each module into the next module to obtain nonpermeating fractions enriched with A component from the preceding module.
Claim 22
Dependent Claim
23 words
A device according to Claim 14, in which the module (2) is for hydraulic permeati and the second module (8) is for pervaporation.
References Cited (Backward Citations)
No citation records indexed.
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