The present invention relates to a method and arrangement for recovering lithium hydroxide from a mineral containing lithium, by pulping the raw material containing lithium in the presence of water and an alkali metal carbonate, leaching the obtained slurry twice, first at an elevated temperature, and secondly in an aqueous solution containing an alkali earth metal hydroxide, separating the thus obtained slurry into solids and a solution containing lithium hydroxide, the latter being purified, whereby lithium hydroxide monohydrate can be recovered from the purified solution by 10 crystallising, and finally separating the solution obtained during the crystallization from the process and recycling it to one or more of the previous process steps.

A process for the preparation from a partially decomposed organic material like peat a granulated or pelletized sorption medium using low-temperature, thermal activation of the sorption medium to produce a high degree of granule or pellet hardness balanced against an efficacious level of ion-exchange and adsorption capacity, followed by chemical treatment of the thermally-activated sorption material via an acid solution and a salt solution to increase its ion-exchange and adsorption performance while minimizing the transfer of natural impurities found in the sorption medium to an aqueous solution is provided by this invention. The sorption medium of this invention can be used in a variety of aqueous solution treatment processes, such as wastewater treatment.

A process for the preparation from a partially decomposed organic material like peat a granulated or pelletized sorption medium using low-temperature, thermal activation of the sorption medium to produce a high degree of granule or pellet hardness balanced against an efficacious level of ion-exchange and adsorption capacity, followed by chemical treatment of the thermally-activated sorption material via an acid solution and a salt solution to increase its ion-exchange and adsorption performance while minimizing the transfer of natural impurities found in the sorption medium to an aqueous solution is provided by this invention. The sorption medium of this invention can be used in a variety of aqueous solution treatment processes, such as wastewater treatment.

One object of the present invention is to produce a weakly acidic cation exchanger under mild conditions. Another object of the present invention is to produce a more firm weakly acidic cation exchange film. Still another object of the present invention is to provide a weakly acidic cation exchanger capable of realizing high-level separation of monovalent cation and simultaneously analyzing monovalent cation and divalent cation and also provide a chromatography column using the ion exchanger. In the production method of a weakly acidic cation exchanger of the invention, a solvent incapable of dissolving a polymer having a double bond within the molecule is used and the weakly acidic cation exchanger is produced by polymerization at temperature of 100 C. or less.

A method of producing ammonium phosphates from at least one mineral containing phosphate and an element which is calcium, magnesium, iron, or aluminum. The method includes contacting the at least one mineral (or a combination of them) with a cation exchanger for a time and at a temperature sufficient to yield phosphoric acid from the mineral.

A method of producing ammonium phosphates from at least one mineral containing phosphate and an element which is calcium, magnesium, iron, or aluminum. The method includes contacting the at least one mineral (or a combination of them) with a cation exchanger for a time and at a temperature sufficient to yield phosphoric acid from the mineral.

This disclosure relates to an proanthocyanidin extract, extract comprising sugars of a fruit juice processes for preparing same as well as the use of the extract or a composition thereof as food or neutraceutical composition.

This disclosure relates to an proanthocyanidin extract, extract comprising sugars of a fruit juice processes for preparing same as well as the use of the extract or a composition thereof as food or neutraceutical composition.

Disclosed are a method for preparing a Schiff base-modified ionic framework material and use thereof in advanced purification of .sup.177Lu-containing medical wastewater, including: using a conventional sponge as a substrate material and employing the Schiff base reaction principle with an amine-based reagent as a bridge and an aldehyde-based reagent as an active excitation reaction monomer to prepare an amino acid-based metal ionic Schiff base-modified ionic framework material by a one-pot synthesis method; and packing the Schiff base-modified ionic framework material in a chromatographic column for the advanced purification of the .sup.177Lu-containing medical wastewater. The material preparation process of this disclosure is simple with stable performance, and the functionalized modified material possesses ion exchange functionality, exhibiting superior adsorption performance for metal cations. Furthermore, the combined process method of this disclosure demonstrates good treatment effects on the .sup.177Lu-containing medical wastewater.

Disclosed are a method for preparing a Schiff base-modified ionic framework material and use thereof in advanced purification of .sup.177Lu-containing medical wastewater, including: using a conventional sponge as a substrate material and employing the Schiff base reaction principle with an amine-based reagent as a bridge and an aldehyde-based reagent as an active excitation reaction monomer to prepare an amino acid-based metal ionic Schiff base-modified ionic framework material by a one-pot synthesis method; and packing the Schiff base-modified ionic framework material in a chromatographic column for the advanced purification of the .sup.177Lu-containing medical wastewater. The material preparation process of this disclosure is simple with stable performance, and the functionalized modified material possesses ion exchange functionality, exhibiting superior adsorption performance for metal cations. Furthermore, the combined process method of this disclosure demonstrates good treatment effects on the .sup.177Lu-containing medical wastewater.