Patent application number | Description | Published |
20120248027 | COMPOSITE SEMIPERMEABLE MEMBRANE AND METHOD FOR PRODUCING SAME - A composite semipermeable membrane comprising a porous support membrane on which a separating functional polyamide layer resulting from the polycondensation reaction of polyfunctional aromatic amines with polyfunctional acid halides is formed, wherein the separating functional polyamide layer has carboxy groups, amino groups, phenolic hydroxyl groups, and azo groups, wherein X | 10-04-2012 |
20120261332 | SEMIPERMEABLE MEMBRANE AND MANUFACTURING METHOD THEREFOR - Provided is a semipermeable membrane having at least a separating functional layer, wherein azo compounds are retained in the separating functional layer, and the separating functional layer has a yellow index of 10 to 40. Also provided is a method of producing the semipermeable membrane. The present invention provides a semipermeable membrane having not only high water permeability but also high rejection performance even for substances that are nondissociative in the neutral range, such as boric acid, and showing high durability and a manufacturing method therefor. | 10-18-2012 |
20130175214 | SEPARATION MEMBRANE, SEPARATION MEMBRANE ELEMENT, AND METHOD FOR PRODUCING SEPARATION MEMBRANE - The present invention provides a separation membrane having a plurality of concavoconvex parts which have a height difference of from 100 μm to 2000 μm and are formed on at least one surface of the separation membrane, in which an average value d1 of a minimum thickness and an average value d2 of a maximum thickness in the concavoconvex parts satisfy the following relational expression | 07-11-2013 |
20130213880 | SEPARATION MEMBRANE, SEPARATION MEMBRANE ELEMENT AND SEPARATION MEMBRANE PRODUCTION METHOD - A separation membrane is provided containing hydrophilic molecules and having, as formed on at least one surface of a feed side and a permeate side thereof, a height difference of from 80 μm to 2000 μm, in which a weight of the hydrophilic molecules in a bone-dry separation membrane is from 0.1% to 40% based on a weight of the bone-dry separation membrane from which the weight of the hydrophilic molecules has been subtracted. | 08-22-2013 |
20130284664 | SEPARATION MEMBRANE FOR WATER TREATMENT AND PRODUCTION METHOD FOR SAME - A separation membrane for water treatment, comprising a porous layer that is obtained by a phase separation method using a solution containing a resin and at least one of either an N,N-disubstituted isobutylamide or an N-monosubstituted isobutylamide. | 10-31-2013 |
20140151286 | SEPARATION MEMBRANE, SEPARATION MEMBRANE ELEMENT, AND METHOD FOR PRODUCING SEPARATION MEMBRANE - A separation membrane includes a separation membrane main body having at least a substrate and a separation function layer; and a channel material having a composition different from that of the separation membrane main body and affixed to a substrate-side surface of the separation membrane main body, wherein the channel material is discontinuous in a first direction and continuous in a second direction from one end to another end of the separation membrane main body. | 06-05-2014 |
20150041388 | SEPARATION MEMBRANE AND SEPARATION MEMBRANE ELEMENT - A separation membrane includes a separation membrane main body that includes a supply-side surface and a filtrate-side surface; and a supply-side channel member disposed on the supply-side surface of the separation membrane main body, wherein when a thickness of the supply-side channel member in a direction perpendicular to a flowing direction of a supplied water that flows on the supply-side surface is a width d of the supply-side channel member, a ratio of height/width (h/d) of the supply-side channel member is 0.7 or greater and 3.0 or less. | 02-12-2015 |
20150068971 | SEPARATION MEMBRANE ELEMENT AND PRODUCTION METHOD FOR SAME - A spiral separation membrane element includes a water collection tube; a separation membrane wound around the water collection tube, having a feed-side surface and a permeate-side surface, and including a band-shaped region on at least one end of the feed-side surface in an axial direction of the water collection tube; and a channel material fused to the band-shaped region. | 03-12-2015 |
20150144550 | SEPARATION MEMBRANE ELEMENT - A separation membrane element includes a water collecting pipe, a separation membrane main body having a feed-side face and a permeate-side face, a feed-side channel material and permeate-side channel materials. The separation membrane main body, the feed-side channel material and the permeate-side channel materials are spirally wound around the water collecting tube. A plurality of the permeate-side channel materials are discontinuously provided on the permeate-side face of the separation membrane main body, along a first direction that is a longitudinal direction of the water collecting pipe. The feed-side channel material has a thickness of from 0.15 to 0.5 mm. | 05-28-2015 |
20150298064 | SEPARATION MEMBRANE AND SEPARATION MEMBRANE ELEMENT - A separation membrane ( | 10-22-2015 |