In some embodiments, the present disclosure pertains to methods of removing heteroatoms from a fluid by associating the fluid with one or more adsorbents, where the association results in the removal of the heteroatoms from the fluid. The association may occur by associating the fluid with a single adsorbent or a plurality of adsorbents in a sequential manner that maximizes heteroatom removal efficacy. The methods may be utilized to remove heteroatom-containing compounds from various fluids, such as fuels, hydrocarbons, alcohols, water, organic solvents, and combinations thereof. The one or more adsorbents may include, without limitation, activated carbon, zeolites, ion exchanged zeolites, ion impregnated zeolites, alumina, alumina nanowires, carbon-based supports, and combinations thereof. The methods of the present disclosure can be utilized to reduce heteroatoms in the fluid by more than about 50%, by more than about 80%, or by more than about 99%.

The invention discloses a separation matrix comprised of porous spherical particles to which antibody-binding protein ligands have been covalently immobilized, wherein the density of said ligands is in the range of 10.5-15 mg/ml and the volume-weighted median diameter of said particles is in the range of 30-55 m. The invention further discloses a method of separation of antibodies by affinity chromatography which employs the said separation matrix within a chromatography column.

A hydrogen gas recovery system according to the present ingestion is configured by a condensation and separation apparatus (A) that condenses and separates chlorosilanes from a hydrogen-containing reaction exhaust gas exhausted from a polycrystalline silicon production step, a compression apparatus (B) that compresses the hydrogen-containing reaction exhaust gas, an absorption apparatus (C) that absorbs and separates hydrogen chloride by contacting the hydrogen-containing reaction exhaust gas with an absorption liquid, a first adsorption apparatus (D) comprising an adsorption column filled with activated carbon for adsorbing and removing methane, hydrogen chloride, and part of the chlorosilanes each contained in the hydrogen-containing reaction exhaust gas, a second adsorption apparatus (E) comprising an adsorption column filled with synthetic zeolite that adsorbs and removes methane contained in the hydrogen-containing reaction exhaust gas, and a gas line (F) that recovers a purified hydrogen gas having a reduced concentration of methane.

The invention relates to a technique for handling liquid radioactive waste from a nuclear fuel-energy cycle, and may be used in a process for processing liquid radioactive waste for maximally reducing the volume thereof and removing radionuclides by concentrating same in a solid phase. The aim is achieved by means of a method for processing liquid radioactive waste and for the recovery thereof, including waste oxidation, separating sludge, colloids and suspended particles from a liquid phase, and removing, from the liquid phase, radionuclides to be subsequently recovered using selective sorbents and filters; the method is characterized in that, prior to the stage for separating sludge, colloids and suspended particles from the liquid phase of the radioactive waste, selective sorbents in the form of powders are added and mixed into the liquid waste.

A continuous chromatography system includes a plurality of treatment columns, each column of the plurality of columns including an adsorbent. The system further includes a valve system configured to operate the plurality of columns as a simulated moving bed system. The valve system includes a first valve configuration having an injection of a brine into a first column of the plurality of columns and an extraction of an eluate from a second column of the plurality of columns. The second column being a different column than the first column. The valve system further includes a second valve configuration comprising a recirculation of fluid through the plurality of columns.

The present invention provides a composite layer agglomerating adsorbent, comprising an outer adsorbent layer containing a low silica X molecular sieve and an inner adsorbent layer containing a high silica X molecular sieve, the low silica X molecular sieve has a silica/alumina molar ratio of 2.07-2.18, the high silica X molecular sieve has a silica/alumina molar ratio of 2.2-2.5, based on the total amount of the adsorbent, the adsorbent comprises 95.0-100 mass % of the X molecular sieve and 0-5.0 mass % of the matrix, the cation sites of the X molecular sieve in the adsorbent are occupied by a metal of Group IIA or occupied together by a metal of Group IA and a metal of Group IIA. The adsorbent is suitable for the process of adsorptive separation of PX from C.sub.8 aromatic hydrocarbons using light aromatic hydrocarbons as desorbent, and has high adsorption selectivity and good mass transfer performance.