The present disclosure relates to the field of making high molecular weight adenosine-based coenzymes available on a large scale. In particular, it relates to a method for purifying high molecular weight adenosine-based coenzymes by implementing a tangential diafiltration, or even dia-ultrafiltration step. This method is, for example, applicable to the purification of coenzyme A disulfide ((CoAS).sub.2), coenzyme A (CoA), nicotinarnide adenine dinucleotide (NAD+), nicotinarnide adenine dinucleotide phosphate (NADP.sup.+) or flavin adenine dinucleotide (FAD).

The present invention addresses the problem of providing a separating membrane mainly comprising a thermoplastic resin having high permeability. The present invention relates to a separating membrane including a thermoplastic resin, wherein the width of voids in the separating membrane is at least equal to 1 nm and at most equal to 1000 nm, and the curvature rate of the voids is at least equal to 1.0 and at most equal to 6.0.

The present invention addresses the problem of providing a separating membrane mainly comprising a thermoplastic resin having high permeability. The present invention relates to a separating membrane including a thermoplastic resin, wherein the width of voids in the separating membrane is at least equal to 1 nm and at most equal to 1000 nm, and the curvature rate of the voids is at least equal to 1.0 and at most equal to 6.0.

A method and device for purifying heptafluoroisobutyronitrile and a dilution gas from a used gas mixture comprising heptafluoroisobutyronitrile, a dilution gas and arcing by-products. The method comprising the steps of (a) contacting the used gas mixture with at least one adsorbent material to generate a gas stream depleted in arcing by-products; (b) contacting the gas stream depleted in by-products with a first membrane to obtain a first permeate stream rich in the dilution gas, and a first retentate stream rich in heptafluoroisobutyronitrile; (c) contacting the first permeate stream rich in the dilution gas with a second membrane to obtain a second permeate stream rich in the dilution gas and a second retentate stream rich in heptafluoroisobutyronitrile; and (d) combining the first and second retentate streams rich in heptafluoroisobutyronitrile.

A method and device for purifying heptafluoroisobutyronitrile and a dilution gas from a used gas mixture comprising heptafluoroisobutyronitrile, a dilution gas and arcing by-products. The method comprising the steps of (a) contacting the used gas mixture with at least one adsorbent material to generate a gas stream depleted in arcing by-products; (b) contacting the gas stream depleted in by-products with a first membrane to obtain a first permeate stream rich in the dilution gas, and a first retentate stream rich in heptafluoroisobutyronitrile; (c) contacting the first permeate stream rich in the dilution gas with a second membrane to obtain a second permeate stream rich in the dilution gas and a second retentate stream rich in heptafluoroisobutyronitrile; and (d) combining the first and second retentate streams rich in heptafluoroisobutyronitrile.

A thin-film composite polyamide reverse osmosis membrane with anti-bacterial and anti-biofouling effects and a preparation method thereof are disclosed. The preparation method includes: dissolving a highly water-stable metal organic framework CuBTTri in an n-hexane solution containing trimesoyl chloride by ultrasonic wave, immersing a polyethersulfone ultrafiltration membrane in an aqueous solution of m-phenylene diamine and taking out, and then immersing the ultrafiltration membrane in the trimesoyl chloride-n-hexane solution containing the aforementioned metal organic framework for reaction and modification, so as to obtain the thin-film composite polyamide reverse osmosis membrane. The resulting composite reverse osmosis membrane integrated with the anti-bacterial metal organic framework CuBTTri has a high reverse osmosis membrane permeability and possesses greatly improved and persistent anti-bacterial and anti-biofouling properties. The preparation method is simple and conducive to promotion, and has mild conditions.

A thin-film composite polyamide reverse osmosis membrane with anti-bacterial and anti-biofouling effects and a preparation method thereof are disclosed. The preparation method includes: dissolving a highly water-stable metal organic framework CuBTTri in an n-hexane solution containing trimesoyl chloride by ultrasonic wave, immersing a polyethersulfone ultrafiltration membrane in an aqueous solution of m-phenylene diamine and taking out, and then immersing the ultrafiltration membrane in the trimesoyl chloride-n-hexane solution containing the aforementioned metal organic framework for reaction and modification, so as to obtain the thin-film composite polyamide reverse osmosis membrane. The resulting composite reverse osmosis membrane integrated with the anti-bacterial metal organic framework CuBTTri has a high reverse osmosis membrane permeability and possesses greatly improved and persistent anti-bacterial and anti-biofouling properties. The preparation method is simple and conducive to promotion, and has mild conditions.

Disclosed herein are mixed matrix membranes, the mixed matrix membranes comprising a metal organic framework CA dispersed in a continuous polymer phase and methods of making and use thereof. The mixed matrix membranes can comprise a plurality of metal organic framework particles comprising UiO-66-(COOH).sub.2 dispersed in a continuous polymer phase. The mixed matrix membranes can comprise a plurality of metal organic framework particles dispersed in a continuous polymer phase comprising polyethersulfone, polyphenylsulfone, Matrimid, Torlon, cellulose acetate, or combinations thereof. Also disclosed herein are mixed matrix membranes for separating a target ion from a non-target ion in a liquid medium. Also described herein methods of separating a target ion from a non-target ion in a liquid medium using a mixed matrix membrane, wherein the mixed matrix membrane comprises a plurality of metal organic framework particles dispersed in a continuous polymer phase.

A gas separation membrane module includes a center pipe; a plurality of separation membranes each having a feed surface and a permeate surface, the separation membranes arranged such that the feed surfaces face each other and the permeate surfaces face each other; a feed channel material arranged between the feed surfaces; and a permeate channel material arranged between the permeate surfaces, wherein the separation membranes, the feed channel material, and the permeate channel material are wound around the center pipe, an average pore size on a front surface and an average pore size on a back surface of the feed channel material are each 0.95 mm or less, and an average pore size on a front surface and an averaged pore size on a back surface of the permeate channel material are each 0.95 mm or less.

A gas separation membrane module includes a center pipe; a plurality of separation membranes each having a feed surface and a permeate surface, the separation membranes arranged such that the feed surfaces face each other and the permeate surfaces face each other; a feed channel material arranged between the feed surfaces; and a permeate channel material arranged between the permeate surfaces, wherein the separation membranes, the feed channel material, and the permeate channel material are wound around the center pipe, an average pore size on a front surface and an average pore size on a back surface of the feed channel material are each 0.95 mm or less, and an average pore size on a front surface and an averaged pore size on a back surface of the permeate channel material are each 0.95 mm or less.