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US 12,064,731 B2Granted
Porous membranes for high pressure filtration
AssigneeSolvay Specialty Polymers USA, LLC
InventorEmanuele Di Nicolo′
Life of this patent
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Abstract
The present invention relates to a porous membrane suitable for use in high pressure filtration method.
Claims15
A method for purifying a fluid containing at least one contaminant, said method comprising the steps of
- (i) providing a fluid containing at least one contaminant;
- (ii) providing a flat membrane [membrane (PP)] comprising at least one porous layer [layer (PP)] comprising at least one polyphenylene polymer [polymer (PP)];
- contacting said fluid containing at least one contaminant and said membrane (PP) by applying a pressure higher than 1 bar to said fluid;
- and
- (iv) recovering the fluid free from said at least one contaminant;
- wherein said polymer (PP) comprises at least about 10 mole percent (per 100 moles of polymer (PP)) of repeating units (Rpm) represented by the following formula:
- and at least about 10 mol percent repeat units (Rpp) represented by the following formula:
- wherein R1, R2, R3, R4, R5, R6, R7, and R8 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, aryloxy, alkylketone, arylketone, fluoroalkyl, fluoroaryl, bromoalkyl, bromoaryl, chloroalkyl, chloroaryl, alkylsulfone, arylsulfone, alkylamide, arylamide, alkylester, arylester, fluorine, chlorine, and bromine,
- and
- wherein said flat membrane is characterized by:
- a tensile modulus (measured according ASTM D638 type V) of at least 201 MPa;
- a gravimetric porosity of at least 0.55;
- and
- a ratio between the tensile modulus and the gravimetric porosity of at least 243 MPa.
11 more elements
A flat membrane [membrane (PP*)] comprising at least one porous layer [layer (PP*)] obtained from a composition [composition (C*)] comprising at least one polyphenylene polymer [polymer (PP)] and at least one solvent [medium (L)], wherein said polymer (PP) is in an amount from 7 wt. % to less than 60 wt. % based on the weight of said composition (C*);
- wherein said polymer (PP) comprises at least about 10 mole percent (per 100 moles of polymer (PP)) of repeating units (Rpm) represented by the following formula:
- and at least about 10 mol percent repeat units (Rpp) represented by the following formula:
- wherein R1, R2, R3, R4R5, R6, R1, and R8 are each independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, aryloxy, alkylketone, arylketone, fluoroalkyl, fluoroaryl, bromoalkyl, bromoaryl, chloroalkyl, chloroaryl, alkylsulfone, arylsulfone, alkylamide, arylamide, alkylester, arylester, fluorine, chlorine, and bromine,
- wherein said flat membrane is characterized by:
- a tensile modulus (measured according to ASTM D638 type V) of at least 201 MPa;
- a gravimetric porosity of at least 0.55;
- a ratio between the tensile modulus and the gravimetric porosity of at least 243 MPa.
4 more elements
Dependencies are inferred from the claim text.