1360648-A is referenced by 3 patents.
1360648 Removing metals from liquids; cement compositions NIPPON SODA CO Ltd 21 Dec 1971 [23 Dec 1970 29 Dec 1970 (2) 28 July 1971 3 Sept 1971 22 Sept 1971 1 Nov 1971] 59361/71 Headings C1C and C1H [Also in Division C3] A process for adsorbing Cu, Hg, Ag or Cd or compounds thereof present in a liquid or gas comprises contacting the liquid or gas with an adsorbent comprising a resin prepared from an aldehyde and thiourea and/or rubeanic acid. Other compounds which may be used in the preparation of the resin are urea, melamine and aromatic compounds having one or more -OH, -SH, -NH 2 , -COOH and (COO) n Me groups (Me = metal, n = valency of Me). The adsorbent may comprise a carrier impregnated with resin in an amount of 0À1-100% by wt. of carrier. The liquid or gas may be passed through a column of adsorbent or treated in a fluidized bed of adsorbent.; The adsorbent may be mixed with cement (e.g. Portland, alumina, silica or Portland blast furnace cement) in an amount of 0À1-50% by wt. of cement to form a mixture which can be used to make boxes to contain waste containing said metals or compounds or which can be mixed with the waste to form a solid piece. The adsorbent may be treated with acid or alkali, prior to use. Aldehydes specified are formaldehyde, acetaldehyde and furfural. Carriers specified are diatomaceous earth, pumice stone, zeolite, kaolin, vermiculite, alumina, silica gel, coke, activated charcoal, graphite, bentonite and foamed polyurethane. Aromatic compounds specified include phenol, thiophenol, benzoic and hydroxybenzoic acids and salts thereof, benzenedithiol, cresol, xylenol, resorcinol, toluenethiol, hydroxybenzene sulphonic acid and salts thereof, benzyl hydrazine and pyridine.; Compounds which can be adsorbed include chlorides, oxides, nitrates, sulphates, carbonates, sulphides and organometallic compounds.