Resorcinol or phloroglucinol condensation product for aqueous mixture purification

In a dialysis machine containing means to absorb urea, or other waste products normally excreted in the urine, or mixtures thereof the improvement wherein said absorbtion means comprises an incompletely condensed phenol aldehyde resin having a large surface area consisting essentially of the condensation product of a phenol or mixture of phenols selected from resorcinol or phloroglucinol, condensed under acidic or alkaline conditions with the addition of water and a catalyst, with up to 4 Mol of formaldehyde per Mol of phenol or a mixture of formaldehyde and other aldehydes and wherein the condensation is carried out under mild conditions in the presence of comparatively large quantities of water and if needed with the addition of another phenol and/or aldehyde or an additive to the extent such that in the ortho-position relative to the phenol hydroxyl group, free methylol groups still remain and the further condensation thereof is prevented, said condensation product being comminuted and dried without substantial heat.

A filter cartridge for the absorption of waste products including urea, ammonia and the like from swimming pools, aquariums or the like, or for use in a dialysis machine, the improvement wherein said cartridge contains as an absorption medium an incompletely condensed phenol aldehyde resin having a large surface area, said incompletely condensed phenol/aldehyde resin consisting essentially of a condensation product of an aldehyde and resorcinol or phloroglucinol, said incompletely condensed phenol/aldehyde resin having free methylol groups in the ortho-position relative to the phenol hydroxyl group.

A container element containing means to absorb urea, or other waste products normally excreted in the urine, or mixtures thereof the improvement wherein said absorption means comprises an incompletely condensed phenol/aldehyde resin having a large surface area, said incompletely condensed phenol/aldehyde resin comprising a condensation product of an aldehyde and resorcinol or phloroglucinol, said incompletely condensed phenol/aldehyde resin having free methylol groups in the ortho-position relative to the phenol hydroxyl group.