Neogen has filed a patent for spiral wound reverse osmosis devices that have reduced lateral leakage and increased salt rejection. The devices are made by compacting a microporous layer within a composite reverse osmosis membrane along its lengthwise periphery. The patent also discloses a method for creating longitudinal indentations in the membrane during manufacturing. The spirally wound membrane device is capable of producing potable water from seawater through reverse osmosis. It consists of sequential layers including feed water channel spacer, reverse osmosis membrane, permeate water channel spacer, and reverse osmosis membrane. The reverse osmosis membrane has a nonwoven web support, a microporous plastic layer, and a semipermeable salt rejecting polymer layer. The device is characterized by having at least one longitudinally indented surface strip along each lengthwise edge of the membrane, in contact with a compacted strip of the microporous plastic coating. GlobalData’s report on Neogen gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Neogen, fluorescence flow cytometry was a key innovation area identified from patents. Neogen's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
Spiral wound reverse osmosis device with reduced lateral leakage
A recently filed patent (Publication Number: US20230126220A1) describes a spirally wound membrane device that can produce potable water from seawater using reverse osmosis. The device consists of sequential layers of feed water channel spacer, reverse osmosis membrane, permeate water channel spacer, and reverse osmosis membrane. The reverse osmosis membrane is composed of a nonwoven web support, a microporous plastic layer, and a semipermeable salt rejecting polymer layer. The device is further characterized by having longitudinally indented surface strips along the lengthwise edges of the membrane, which are in contact with a compacted strip of the microporous plastic coating. This design helps to restrict lateral microleakage of seawater through the microporous plastic layer, ensuring efficient water purification.
The patent also describes a method for making a reverse osmosis membrane with reduced lateral leakage. The method involves embossing a sheet of the membrane along its length to create longitudinally indented surfaces adjacent to the side edges. This embossing process can be done using a cylindrical disk with a raised ridge positioned on its circumference. The sheet used in the method is part of a continuous web that includes a nonwoven web coated with a microporous plastic layer and an ultrathin salt-rejecting layer. The embossing can be performed by contacting the sheet with the embossing disk, while the nonwoven web is supported by an idler roller, a drive roller, or a stationary shoe at the point of contact. Multiple longitudinally indented surfaces can be generated, with at least one adjacent to each edge of the web. This method allows for the production of reverse osmosis membranes that effectively reduce lateral leakage, improving the overall performance of the membrane device.
In summary, the filed patent describes a spirally wound membrane device and a method for making reverse osmosis membranes with reduced lateral leakage. The device consists of sequential layers and features longitudinally indented surface strips that restrict seawater leakage. The method involves embossing a membrane sheet to create these indented surfaces, resulting in improved membrane performance. These innovations have the potential to enhance the efficiency and effectiveness of reverse osmosis systems for producing potable water from seawater.