Disclosed is a method for removing factor XI (FXI) during plasma protein purification, more specifically a method for removing FXI including dialyzing and concentrating a plasma protein fraction II paste containing FXI and a plasma protein, and then removing the FXI using a ceramic-based cation exchange resin. The method for removing factor XI (FXI) can improve removal efficiency of impurities and thrombogenic substances, thereby producing stable plasma proteins with improved quality.

A process for purifying washing waters of a production plant of the cosmetics sector includes subjecting the washing waters to an ultrafiltration treatment that produces an ultrafiltration concentrate and ultrafiltration water, and subjecting ultrafiltration water to a biological treatment with separation of sludges to be disposed of or further treated and treated water to be disposed of or to undergo subsequent treatments.

The present invention provides an improved process for isolating 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine (DIOPAT) from an aqueous alkaline mixture M having a pH of 10 or more and comprising the 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-dihydroxybenzophenone, and aluminum salts, wherein the process comprises a nanofiltration step, a precipitation step, and a further filtration step.

The present invention provides an improved process for isolating 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine (DIOPAT) from an aqueous alkaline mixture M having a pH of 10 or more and comprising the 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-dihydroxybenzophenone, and aluminum salts, wherein the process comprises a nanofiltration step, a precipitation step, and a further filtration step.

The present invention relates to a method for the production of drinking water. In addition, the present invention also relates to the use of minerals extracted from a feed water stream by using a combination of a Donnan dialysis unit and a membrane unit as a source of minerals for the production of drinking water originating from said feed water stream.

There is provided a process for effecting separation of an operative material from a gaseous feed material via a membrane that includes a polymeric phase and a liquid phase, comprising: over a first time interval, within a first apparatus, separating a first fraction of the operative material in response to permeation of the first fraction of the operative material through the membrane, with effect that residual material, including unseparated operative material is discharged and, within a second apparatus, from the residual material, separating a second fraction of the operative material in response to permeation of the second fraction of the operative material through the membrane; and after the first time interval, disposing a liquid material relative to the membrane of the first apparatus, such that a first fraction of the liquid material replenishes the liquid phase of the membrane of the first apparatus, and residual liquid material is collected by a redistributor and redistributed such that the residual liquid material becomes disposed relative the membrane of the second apparatus, such that a second fraction of the liquid material replenishes the liquid phase of the membrane of the second apparatus.

A desalination system includes a desalination platform, a first skid disposed on a first deck of the desalination platform, the first skid including at least one of a first filtration unit configured to produce a first filtrate stream, and a first permeate unit configured to produce a first permeate stream, a first interconnecting pipework coupled to the first skid, and a first pipework support disposed on the first deck, wherein the first interconnecting pipework is disposed on the first pipework support.

A submersible reverse osmosis desalination apparatus and method employs airlift to remove desalinated water from the apparatus via as annular flow regime over a substantial portion of the product water discharge conduit. Use of a high air fraction for airlift operation and an annular flow regime significantly lowers the weight of the product water column, as well as the backpressure on the downstream side of the osmotic membranes and at the bottom of the discharge water conduit. This permits deployment of the apparatus at reduced depths and in many eases closer to shore. In preferred embodiments the apparatus relies wholly upon hydrostatic pressure to drive seawater through the osmotic membranes, and continuously desalinates seawater and delivers pure water to the discharge water conduit without using any submerged moving parts subject to wear or breakage.

A method for separation and enrichment of lithium includes the following steps: pretreatment: diluting and filtering salina aged brine to obtain pretreated brine; separation: separating the pretreated brine via a nanofiltration separation system to obtain nanofiltration permeate and nanofiltration concentrate; first concentration: carrying out first concentration on the nanofiltration permeate via a reverse osmosis system to obtain reverse osmosis concentrate and reverse osmosis permeate; second concentration: carrying out second concentration on the reverse osmosis concentrate via an electrodialysis system to obtain electrodialysis concentrate and electrodialysis permeate, and the electrodialysis concentrate is solution enriching lithium ions. The present application couples several different membrane separation technologies by utilizing the advantages of different membrane separation technologies, thereby achieving the purposes of improving the separation efficiency of magnesium and lithium and improving the enrichment efficiency of lithium.

A method for efficient separation and enrichment of lithium includes the following steps: pretreatment: diluting and filtering salina aged brine to obtain pretreated brine; separation: separating the pretreated brine via a nanofiltration separation system to obtain nanofiltration permeate and nanofiltration concentrate, wherein the operation pressure of the nanofiltration separation system is 1.0 MPa˜5.0 MPa; first concentration: carrying out first concentration on the nanofiltration permeate via a reverse osmosis system to obtain reverse osmosis concentrate and reverse osmosis permeate; and second concentration: carrying out second concentration on the reverse osmosis concentrate via an electrodialysis system to obtain electrodialysis concentrate and electrodialysis permeate, wherein the electrodialysis concentrate is a solution enriching lithium ions. The present application couples several different membrane separation technologies and adopts the monovalent ion selective nanofiltration membrane having good separation performance in the process of nanofiltration.