A high yielding extraction process for the purification of N-(2,4-dichloro-5-(4-(difluoromethyl)-3-methyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)methanesulfonamide (sulfentrazone) by selectively partitioning the desired product from the crude mixture, thereby increasing its purity by decreasing the presence of unwanted impurities and improving the color and particle size distribution of the final sulfentrazone product. The selective partitioning is achieved by the sequential use of an organic solvent, water, aqueous inorganic base and a concentrated aqueous inorganic acid.

The present disclosure provides a system for refining long chain dicarboxylic acid, comprising: a first membrane filtration unit, for a first membrane filtration of a long chain dicarboxylic acid fermentation broth or a treated liquid therefrom; a first decolorization unit, for carrying out a first decolorization treatment to the filtrate obtained after the membrane filtration; a first acidification/crystallization unit, for carrying out a first acidification/crystallization of a filtrate obtained after the membrane filtration to give a solid-liquid mixture; a first separation unit, for a solid-liquid separation of the solid-liquid mixture; a drying unit, for drying the solid separated by the separation unit to give a first solid. By using the refining system according to the present disclosure, the purity of the obtained product is high, and the disadvantages such as poor quality of the product obtained by crystallization from a solvent and environment pollution caused by a solvent can be overcome.

There is disclosed a process for recovering monoethanolamine from an aqueous mother liquor solution comprising the steps of: (a) adding excess ammonia or alkali hydroxide and a solvent to the aqueous solution comprised of monoethanolamine sulfate and at least one component selected from the group of inorganic salts consisting of ammonium sulfate, ammonium sulfite, alkali sulfite, and alkali sulfate, to precipitate the inorganic salts, wherein the alkali is lithium, sodium, or potassium; (b) separating the inorganic salts by means of a solid-liquid separation to yield an aqueous solution comprised of the monoethanolamine; and (c) distilling the solvent to yield an aqueous solution comprised of the monoethanolamine and optionally purifying the MEA by distillation. The recovered MEA is recycled to produce taurine.

Described are liquid-flowable, porous polyethylene filter membranes that include two opposing sides and that have an asymmetric pore structure; filter components and filters that include this type of porous polyethylene filter membrane; methods of making the porous polyethylene filter membranes, filter components, and filters; and methods of using a porous polyethylene filter membrane, filter component, or filter, to filter a fluid such as a liquid chemical to remove unwanted material from the fluid.

Described are liquid-flowable, porous polyethylene filter membranes that include two opposing sides and that have an asymmetric pore structure; filter components and filters that include this type of porous polyethylene filter membrane; methods of making the porous polyethylene filter membranes, filter components, and filters; and methods of using a porous polyethylene filter membrane, filter component, or filter, to filter a fluid such as a liquid chemical to remove unwanted material from the fluid.

The present invention relates to the field of radiopharmaceuticals for in vivo imaging, in particular to a method of purifying a radiotracer which comprises .sup.18F-labelled aminoxy-functionalised biological targeting moiety. The invention provides radioprotectant-containing radiopharmaceutical compositions of the tracers, as well as associated automated methods and cassettes.

The present invention relates to the field of radiopharmaceuticals for in vivo imaging, in particular to a method of purifying a radiotracer which comprises .sup.18F-labelled aminoxy-functionalised biological targeting moiety. The invention provides radioprotectant-containing radiopharmaceutical compositions of the tracers, as well as associated automated methods and cassettes.

The present invention refers to new purified compositions of long chain polyunsaturated fatty acids, or their salts or esters, characterized by being essentially free from other usually present—but structurally different—components, such as furan fatty acids, phytanic and pristanic acids, squalene, and some oligomers, as well as several “persistent” environmental pollutants, such as polychlorinated dibenzo-dioxins and polychlorinated dibenzo-furans, polychlorinated biphenyls, polybrominated diphenyl-ethers, polycyclic aromatic hydrocarbons, and others, which are also usually present and extremely toxic. The invention also refers to the purification method to obtain said compositions and the use thereof as food, food for special medical use, food and diet supplement, and drug.

The present invention provides a method for obtaining a specifically-shaped crystal (specifically, spherocrystal) of a compound with good reproducibility. This method for producing a specifically-shaped crystal (specifically spherocrystal) of a compound comprises: (1) a step for preparing a supersaturated solution of a compound having a degree of supersaturation equal to or higher than a critical degree of supersaturation; and (2) a step for precipitating a specifically-shaped crystal (specifically spherocrystal) of a compound from the supersaturated solution.

The present invention provides a method for obtaining a specifically-shaped crystal (specifically, spherocrystal) of a compound with good reproducibility. This method for producing a specifically-shaped crystal (specifically spherocrystal) of a compound comprises: (1) a step for preparing a supersaturated solution of a compound having a degree of supersaturation equal to or higher than a critical degree of supersaturation; and (2) a step for precipitating a specifically-shaped crystal (specifically spherocrystal) of a compound from the supersaturated solution.