The present invention provides a method for improved preparation of Sugammadex sodium.

The present invention provides a method for improved preparation of Sugammadex sodium.

A surface-modified filter membrane for filtering blood, in particular for separating blood plasma and blood serum, and a method for the production thereof, a filter provided therewith and the use thereof.

A method of operating an immersed microporous membrane module includes a step of monitoring membrane performance to sense the onset of sludging in the module. Differences in permeability between permeation in backwashes, or trends in permeability during backwashing and permeability during permeation, or both, are monitored. Solid deposits formed during the onset of sludging may be removed with an in situ de-sludging process. For example, the deposits may be removed by stopping permeation while aerating the module, optionally at an increased rate. At other times, the module is optionally aerated while permeate is withdrawn at an aeration rate correlated to flux. The method may be used in particular with a membrane module having parallel textured flat sheet membranes suspended between a pair of vertically oriented headers. An aerator may be made from an open bottomed channel having an array of holes rising and concentrated towards the center of the channel.

A method for removing dust from flue gas using an emulsion liquid membrane, including: a) dissolving a surfactant into a membrane solvent to yield a membrane-forming liquid; stirring and injecting an internal phase liquid into the membrane-forming liquid to yield an emulsion; b) stirring and adding the emulsion to an external phase liquid to disperse the emulsion into the external phase liquid to yield an emulsion liquid membrane; c) allowing the emulsion liquid membrane to contact with a flue gas for removing dust; d) separating a dust-loaded emulsion, and demulsifying the dust-loaded emulsion under an electrostatic field to release the dust from the membrane-forming liquid; recycling the membrane-forming liquid to a); and e) allowing the dust released from the demulsification to precipitate in the form of a slurry and discharging the slurry.

Provided is method of extracting and separating gallium by emulsion liquid membrane. The method of extracting and separating gallium by emulsion liquid membrane includes preparation of the emulsion liquid membrane, extraction and deextraction. By establishing a proper emulsion liquid membrane system, gallium is selectively extracted from the gallium leaching solution. In the scheme of the present disclosure, chosen factors are optimized through fractional fractorial design and central composite design so as to obtain an optimal processing scheme. The influences of gallium solution/emulsion volume ratio, extractant concentration, H.sub.2SO.sub.4 concentration, emulsion stirring duration and emulsion stirring speed on the gallium extraction rate are studied, and efficient enrichment of gallium is achieved. Besides, reproducibility of the emulsion liquid membrane is also studied, and after demulsification, the separated oil is used again for experiments, without obvious difference from newly prepared emulsion liquid membrane.

Provided is method of extracting and separating gallium by emulsion liquid membrane. The method of extracting and separating gallium by emulsion liquid membrane includes preparation of the emulsion liquid membrane, extraction and deextraction. By establishing a proper emulsion liquid membrane system, gallium is selectively extracted from the gallium leaching solution. In the scheme of the present disclosure, chosen factors are optimized through fractional fractorial design and central composite design so as to obtain an optimal processing scheme. The influences of gallium solution/emulsion volume ratio, extractant concentration, H.sub.2SO.sub.4 concentration, emulsion stirring duration and emulsion stirring speed on the gallium extraction rate are studied, and efficient enrichment of gallium is achieved. Besides, reproducibility of the emulsion liquid membrane is also studied, and after demulsification, the separated oil is used again for experiments, without obvious difference from newly prepared emulsion liquid membrane.