An endoluminal prosthesis for placing in a body passage of a patient, includes a ureteral stent, the ureteral stent having a generally tubular housing having a proximal end and a distal end and a lumen longitudinally disposed therethrough, with cation-exchange resin beads disposed within the tubular housing, and at least one anchoring mechanism disposed on a distal end of the tubular housing, where at least one retention screen is disposed within the lumen of the ureteral stent configured to retain the plurality of beads.

An endoluminal prosthesis for placing in a body passage of a patient, includes a ureteral stent, the ureteral stent having a generally tubular housing having a proximal end and a distal end and a lumen longitudinally disposed therethrough, with cation-exchange resin beads disposed within the tubular housing, and at least one anchoring mechanism disposed on a distal end of the tubular housing, where at least one retention screen is disposed within the lumen of the ureteral stent configured to retain the plurality of beads.

A method for preparing a crystallized solid material of formula LiCl.2Al(OH).sub.3.nH.sub.2O with n being comprised between 0.01 and 10, includes mixing in an aqueous medium, at least one source of alumina and at least one source of lithium in order to obtain a suspension, filtering the resulting suspension obtained for obtaining a slurry, followed by drying the obtained slurry and shaping the dried slurry after the drying to obtain a shaped solid material. The shaping is carried out in absence of a binder followed by drying and a hydrothermal treatment to obtain the shaped crystallized solid material of formula LiCl.2Al(OH).sub.3.nH.sub.2O. A method for extracting lithium from saline solutions uses the thereby prepared material.

A method for preparing a crystallized solid material of formula LiCl.2Al(OH).sub.3.nH.sub.2O with n being comprised between 0.01 and 10, includes mixing in an aqueous medium, at least one source of alumina and at least one source of lithium in order to obtain a suspension, filtering the resulting suspension obtained for obtaining a slurry, followed by drying the obtained slurry and shaping the dried slurry after the drying to obtain a shaped solid material. The shaping is carried out in absence of a binder followed by drying and a hydrothermal treatment to obtain the shaped crystallized solid material of formula LiCl.2Al(OH).sub.3.nH.sub.2O. A method for extracting lithium from saline solutions uses the thereby prepared material.

The present disclosure relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products.

The present disclosure relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products.

A method for producing a nonatitanate of an alkali metal, the method having: a first step for reacting an alkali metal hydroxide with titanium tetrachloride and producing Ti(OH).sub.4; a second step for mixing the resulting Ti(OH).sub.4 and an alkali metal hydroxide; and a third step for heating the mixture obtained in the second step, the alkali metal hydroxide being used so that the A/Ti molar ratio (A represents an alkali metal element) falls within a range of 1.0-5.0 in the second step, wherein a nonatitanate of an alkali metal can be produced economically.

An aspect of the disclosure relates to a dialysate regenerator, including: a purification means; at least one reversible retainer including an ion reservoir; a dialysate flow path including a dialysate inlet for receiving a dialysate, a dialysate outlet for dispensing the dialysate, the purification means and the at least one reversible retainer: a pump connected to the dialysate flow path and configured to generate a flow of the dialysate from the dialysate inlet via the reversible retainer and the purification means to the dialysate outlet, wherein a direction of the dialysate flow path through the reversible retainer is reversible.

An aspect of the disclosure relates to a dialysate regenerator, including: a purification means; at least one reversible retainer including an ion reservoir; a dialysate flow path including a dialysate inlet for receiving a dialysate, a dialysate outlet for dispensing the dialysate, the purification means and the at least one reversible retainer: a pump connected to the dialysate flow path and configured to generate a flow of the dialysate from the dialysate inlet via the reversible retainer and the purification means to the dialysate outlet, wherein a direction of the dialysate flow path through the reversible retainer is reversible.

A process for mechanical separation of sorbent particles in a Direct Lithium Extraction (DLE) process using an ultrafiltration membrane and/or nanofiltration membrane. Also disclosed is a system for mechanical separation of sorbent particles in a Direct Lithium Extraction (DLE) process using an ultrafiltration membrane and/or nanofiltration membrane. Also disclosed is an improved DLE process with a pH controlled upload step.