The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are chromatographic materials comprising having a narrow particle size distribution.

A variety of compositions and materials are provided for water purification and remediation. The compositions including multiple functionalities for treating a variety of pollutants or contaminants. The compositions can include a porous organic polymer with one or more of a variety of functional groups for binding the contaminants and with a hierarchical pore size distribution over a range of pore sizes to facilitate enhanced removal of the contaminants. Functional groups can include one, two, or more different functional groups such as amines, halides, ammoniums, pyridiuiums, thiols, imidazoliums, salts thereof, or others. The range of pore sizes can be about 1 nm to 10 nm or more. Contaminants can include antimony, arsenic, barium, beryllium, cadmium, chromium, copper, lead, mercury, selenium, technetium, thallium, uranium, radium, urea, and phosphate. Methods of removing the contaminants from water using the compositions are also provided.

Use of an alkyltrichlorosilane of the following formula I: R-SiCl.sub.3, wherein: R represents an alkyl group, Si represents a silicon atom and Cl represents a chlorine atom, and/or of a silsesquioxane of the following formula II: [RSiO.sub.3/2].sub.n, wherein: R represents an alkyl group, Si represents a silicon atom, O represents an oxygen atom and n represents an integer, for the removal of microplastic particles from water and/or for the treatment of water. Further, a method for the removal of microplastic particles from water and/or for the purification of water is provided, as well as an inclusion and/or intercalation compound, a kit for the removal of microplastic particles from water and/or for the purification of water as well as a water treatment system.

Use of an alkyltrichlorosilane of the following formula I: R-SiCl.sub.3, wherein: R represents an alkyl group, Si represents a silicon atom and Cl represents a chlorine atom, and/or of a silsesquioxane of the following formula II: [RSiO.sub.3/2].sub.n, wherein: R represents an alkyl group, Si represents a silicon atom, O represents an oxygen atom and n represents an integer, for the removal of microplastic particles from water and/or for the treatment of water. Further, a method for the removal of microplastic particles from water and/or for the purification of water is provided, as well as an inclusion and/or intercalation compound, a kit for the removal of microplastic particles from water and/or for the purification of water as well as a water treatment system.

The present disclosure relates to a mixed matrix carbon molecular sieve (CMS) membrane, a preparation method of the mixed matrix CMS membrane, and use of the mixed matrix CMS membrane in C.sub.2H.sub.4/C.sub.2H.sub.6 separation, and belongs to the technical field of membrane separation. The present disclosure solves the problem that the CMS materials in the prior art exhibit low selectivity and low flux during an ethylene/ethane separation process. In this patent, C.sub.3N.sub.4 is used as a filling particle to prepare a mixed matrix membrane (MMM), and the MMM is pyrolyzed to prepare a CMS membrane. The C.sub.3N.sub.4/6FDA-DAM MMM has prominent C2 separation performance.

The present disclosure relates to a mixed matrix carbon molecular sieve (CMS) membrane, a preparation method of the mixed matrix CMS membrane, and use of the mixed matrix CMS membrane in C.sub.2H.sub.4/C.sub.2H.sub.6 separation, and belongs to the technical field of membrane separation. The present disclosure solves the problem that the CMS materials in the prior art exhibit low selectivity and low flux during an ethylene/ethane separation process. In this patent, C.sub.3N.sub.4 is used as a filling particle to prepare a mixed matrix membrane (MMM), and the MMM is pyrolyzed to prepare a CMS membrane. The C.sub.3N.sub.4/6FDA-DAM MMM has prominent C2 separation performance.

This disclosure provides methods for separating multi-ring naphthenes from a hydrocarbon feedstock. The hydrocarbon feedstock includes at least normal paraffins, isoparaffins, 1-ring naphthenes attached with a paraffinic alkyl chain, and multi-ring naphthenes. The methods comprise passing the hydrocarbon feedstock and a solvent, at a temperature and pressure through a bed of an adsorbent comprising a metal-organic framework (MOF) adsorbent, to adsorb the multi-ring naphthenes from the hydrocarbon feedstock, thereby producing a base stock product that is depleted in multi-ring naphthenes. The metal-organic framework adsorbent is a porous crystalline material comprised of metal functionalities connected by organic linkers to form a repeating 2-D or 3-D lattice. The base stock product has a viscosity index (VI) greater than the viscosity index of the hydrocarbon feedstock. The methods of this disclosure upgrade Group II base stocks (also Group II+ base stocks) to Group III or Group III+ base stocks, and also upgrade Group III base stocks to Group III+ base stocks.

A visible light-reactive photocatalyst includes: a metal-organic framework (MOF) including pores; and an active material doped on the surface of the metal-organic framework, wherein the active material includes molybdenum disulfide (MoS.sub.2) or titanium oxide (TiO.sub.2).

A polymer matrix composite comprising a porous polymeric network; and a plurality of functional particles distributed within the polymeric network structure, and wherein the polymer matrix composite has an air flow resistance at 25° C., as measured by the “Air Flow Resistance Test,” of less than 300 seconds/50 cm.sup.3/500 micrometers; and wherein the polymer matrix composite has a density of at least 0.3 g/cm.sup.3; and methods for making the same. The polymer matrix composites are useful, for example, as filters.

A polymer matrix composite comprising a porous polymeric network; and a plurality of functional particles distributed within the polymeric network structure, and wherein the polymer matrix composite has an air flow resistance at 25° C., as measured by the “Air Flow Resistance Test,” of less than 300 seconds/50 cm.sup.3/500 micrometers; and wherein the polymer matrix composite has a density of at least 0.3 g/cm.sup.3; and methods for making the same. The polymer matrix composites are useful, for example, as filters.