| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c85d78c6a4459b5dbbc49c82a4c5c107 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-301
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2103-365
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2103-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2311-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-40 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0013
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-125
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0088
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0093
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-025
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-441 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D63-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D61-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-02 |
| filingDate |
2014-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2022-01-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a74a8558707be86318b59396c742f600
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3502a94148f371b76b0174583f71d512
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d11122305e1949f114b944b4680579a2
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_73945158c8900a2b7110027be909f017 |
| publicationDate |
2022-01-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2935680-C |
| titleOfInvention |
Treatment of aqueous mixtures containing anionic surfactants using fouling resistant reverse osmosis membrane |
| abstract |
A method for treating an aqueous mixture containing an anionic surfactant including the step of passing the mixture through a spiral wound element to produce a permeate stream and concentrate stream wherein the concentrate stream has a relatively higher concentration of the anionic surfactant than the permeate stream, wherein the spiral wound element includes a composite polyamide membrane comprising a porous support and a thin film polyamide layer, and wherein the membrane is characterized by having: i) a NaCl rejection and an anionic rejection of at least 99% when tested with an aqueous solution containing 2000 ppm NaCl and 2 ppm an anionic surfactant at 25°C, pH 8 and ImPa (150 psi); and ii) a dissociated carboxylate content of at least 0.3 moles/kg of polyamide at pH 9.5 as measured by Rutherford Backscattering (RBS). |
| priorityDate |
2014-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |