Process for the preparation of particles with antibacterial coating, which comprises the following steps: (a) providing an aqueous suspension containing a polyamine, a crosslinker and a porous organic or inorganic carrier material in particle form at a temperature lower than or equal to 10° C. in a mixer for coating the inorganic carrier material with the polyamine; (b) crosslinking the organic polymer in the pores of the inorganic carrier material and simultaneously removing water.

Process for the preparation of particles with antibacterial coating, which comprises the following steps: (a) providing an aqueous suspension containing a polyamine, a crosslinker and a porous organic or inorganic carrier material in particle form at a temperature lower than or equal to 10° C. in a mixer for coating the inorganic carrier material with the polyamine; (b) crosslinking the organic polymer in the pores of the inorganic carrier material and simultaneously removing water.

A sorbent cartridge device includes an ion-exchange material containing zirconium phosphate and no more than about 0.1 mg of leachable phosphate ions per about 1 g of the ion-exchange material. In one example, the cartridge also includes a phosphate-adsorbing material containing zirconium oxide. In this example, the weight ratio between zirconium phosphate and zirconium oxide in the cartridge is from about 10:1 to about 40:1. The zirconium phosphate may be alkaline zirconium phosphate prepared by a process including the following steps: (i) drying acid zirconium phosphate to obtain a dry acid zirconium phosphate; (ii) combining the dry acid zirconium phosphate with an aqueous solution to obtain an aqueous slurry; and (iii) combining the slurry with an alkali hydroxide to obtain the alkaline zirconium phosphate. During step (ii), any free phosphate ions in the dry acid zirconium phosphate leach out into the aqueous phase of the slurry.

A sorbent cartridge device includes an ion-exchange material containing zirconium phosphate and no more than about 0.1 mg of leachable phosphate ions per about 1 g of the ion-exchange material. In one example, the cartridge also includes a phosphate-adsorbing material containing zirconium oxide. In this example, the weight ratio between zirconium phosphate and zirconium oxide in the cartridge is from about 10:1 to about 40:1. The zirconium phosphate may be alkaline zirconium phosphate prepared by a process including the following steps: (i) drying acid zirconium phosphate to obtain a dry acid zirconium phosphate; (ii) combining the dry acid zirconium phosphate with an aqueous solution to obtain an aqueous slurry; and (iii) combining the slurry with an alkali hydroxide to obtain the alkaline zirconium phosphate. During step (ii), any free phosphate ions in the dry acid zirconium phosphate leach out into the aqueous phase of the slurry.

The present invention relates to zirconium silicate compositions having a lead content that is below 0.6 ppm and methods of manufacturing zirconium silicate at reactor volumes exceeding 200-L with a lead content below 1.1 ppm. The lead content of the zirconium silicate of this invention are within the levels that are considered acceptable for extended use given the dose requirements for zirconium silicate.

The present invention relates to zirconium silicate compositions having a lead content that is below 0.6 ppm and methods of manufacturing zirconium silicate at reactor volumes exceeding 200-L with a lead content below 1.1 ppm. The lead content of the zirconium silicate of this invention are within the levels that are considered acceptable for extended use given the dose requirements for zirconium silicate.

A lithium ion sorbent includes an organosilane-grafted lithium ion sieve. The organosilane-grafted lithium ion sieve is a reaction product of a lithium ion sieve and an organosilane. The lithium ion sieve is either a delithiated orthosilicate or a delithiated metal oxide. The organosilane reagent is of the general formula: R.sup.1—(CH.sub.2).sub.n—Si—R.sup.4.sub.3 where R.sup.1 is an organic moiety containing a functional group selected from an acrylate, methacrylate or vinyl group or their derivatives, R.sup.4 is either a hydrolysable alkoxy group or a methyl group, where at least one of the three R.sup.4 groups is a hydrolysable alkoxy group and n is 1-3. This lithium ion sorbent is durable and useful for adsorbing lithium from aqueous resources. The lithium ion sorbent can also be used in the manufacture of a composite material where the organosilane-grafted lithium ion sieve is covalently incorporated into a porous crosslinked polymeric support scaffold.

A method for treating a fluid waste, comprising adding one or more process additives to the fluid waste in an amount sufficient to change the wasteform chemistry is disclosed. The addition step may be chosen from adding a dispersant or a deflocculant an additive to decrease the reactive metal components, to bind fission products and decrease volatilization of toxic or radioactive elements or species during thermal treatment, or to target and react with the fine particle size component of the waste to decrease dusting and immobilize components in a durable phase. After mixing the fluid waste with the described additives the waste is eventually hot-isostatic pressing, to form a durable and stable waste form.

A method for treating a fluid waste, comprising adding one or more process additives to the fluid waste in an amount sufficient to change the wasteform chemistry is disclosed. The addition step may be chosen from adding a dispersant or a deflocculant an additive to decrease the reactive metal components, to bind fission products and decrease volatilization of toxic or radioactive elements or species during thermal treatment, or to target and react with the fine particle size component of the waste to decrease dusting and immobilize components in a durable phase. After mixing the fluid waste with the described additives the waste is eventually hot-isostatic pressing, to form a durable and stable waste form.

A proton-conductive membrane includes a hydrophobic organic polymer and a hydrophilic proton-conductive component. The hydrophilic proton-conductive component includes one of an urea-containing material and a complex formed from an acidic substance and a basic substance, and a combination thereof. The hydrophilic proton-conductive component is present in an amount ranging from 23 parts by weight to 70 parts by weight based on 100 parts by weight of the proton-conductive membrane.