Zirconyl nitrate

Example. (Ca, ZrO) nitrates - - (COOH)2 — (Ca, ZrO)(COO)2 calcium and zirconyl nitrates solution to which oxalic acid is added. The oxalate solid solution of cations is then fired to 1300 K... 

Tin chloride pentahydrate (SnCU-5H20) and zirconyl nitrate hydrate (Zr0(N03)2 6H20) were used as precursors of catalysts. These precursors were dissolved in the distilled water with stirring. Ammonium hydroxide solution was dropped into an aqueous solution of the... 

Rh(N03)3 stock solution (10.37% Rhby wt.) - Engelhard Corp. Perrhenic Acid stock solution (52.091% Re by wt.) - Engelhard Corp. Zirconyl Nitrate, hydrate - Aldrich Chemical Co. 

The addition of zirconium to activated carbon may substantially increase the removal of arsenic from water (Daus, Wennrich and Weiss, 2004 Schmidt et al., 2008). (Daus, Wennrich and Weiss, 2004) used batch and column tests to evaluate the ability of five materials (activated carbon, zirconium-loaded activated carbon, zerovalent iron, granulated Fe(III) hydroxide, and a commercial product, Absorptionsmittel 3 ) to sorb As(III) and As(V) from water. The GAC had grain sizes between 1.0 and 1.5 mm. The material was primarily chosen as a comparison with the zirconium-loaded sample. The zirconium-loaded activated carbon contained 28 mg zirconium g 1 activated carbon and was produced by shaking activated carbon in a solution of zirconyl nitrate (Zr0(N03)2). The zerovalent iron (Fe(0)) primarily had particle sizes of 1.2-1.7 mm. Absorptionsmittel 3 is a mixture of calcite, brucite, fluorite, and iron hydroxides. The granular iron hydroxides consisted of mostly amorphous Fe(III) hydroxide coatings on sand grains (particle sizes of 3-4mm) (Daus, Wennrich and Weiss, 2004, 2950). 

Reactions of zirconium(IV) [zirconyl Zr02+] ions To study these reactions use a 01m solution of zirconyl nitrate, Zr0(N03)2.2H20, or zirconyl chloride, Zr0Cl2.8H20. These solutions must contain some free acid. 

Zirconyl nitrate (011m). Dissolve 26 2 g zirconyl nitrate dihydrate, Zr0(N03)2.2H20, in 100 ml 2m nitric acid and dilute with water to 1 litre. 

The individual elements produced various results. Additions of antimony oxide, tin(ll) oxide, and samarium oxide gave no evidence of reactions with the nitrate melt or solubility. The addition of zirconyl nitrate resulted in the evolution of nitrogen dioxide from the melt and the formation of a white insoluble precipitate. Addition of palladium nitrate to the melt produced a black melt and black insoluble solids. Dissolution of the cooled and solidified salt cake with distilled water indicated that a palladium mirror had formed at the meniscus of the melt. Niobium was added as potassium hexaniobate, KgNb Oj I6H2O. 

An yttrium-based strong Lewis acid, prepared by treatment of aqueous solutions of yttrium nitrate and zirconyl nitrate (molar ratio 16 84) with aqueous ammonia (28%), was an active catalyst of a wide range of Diels-Alder reactions [51], Among the reactions investigated was that of acrolein with dihydropyran (Scheme 2). In contrast with reactions with H-form zeolites [11] no regio- and stereoisomers were formed. 

Crystals of zirconium nitrate, Zr(N03)4-5H2 0, can be obtained by evaporating a solution of ZrOj in strong nitric acid at a temperature not hi er than 1S°C. Evaporation at hi er temperatures or low acid concentration yields zirconyl nitrate, Zr0(N03)2 2H2 0. Zirconyl nitrate is less readily extracted by tributyl phosphate than zirconium nitrate, a property made use of in separating thorium from flssion-pioduct zirconium. Chap. 10. 

Zr02 zirconyl nitrate, zirconium SpanSO/heptane/isopropyl alcohol/ 2 nm-10 mm Support material 57 >3 0... 

Zr02 zirconyl nitrate, SpanSO/heptane/isopropylalcohol/ water 2 nm-10 mm - Support material 59... 

Zirconium phosphate, which is easily prepared by the addition of a solution of zirconyl nitrate or chloride to a phosphate solution is extremely insoluble and will not dissolve in solutions of high or low pH. It is an inorganic polymer of composition Zr(H2P04)2-H20 and a relative... 

Small batches ( 10 g) of powders were prepared by the glycine-nitrate process (GNP) [5], Appropriate amounts of metal salts (barium-, cerium-, yttrium-, and zirconyl nitrates, ammonium cerium [IV] nitrate, and barium acetate were [Alfa Aesar, Ward Hill, MA]) and glycine were dissolved in deionized water. The solution was heated on a hot plate in a stainless steel beaker until a sufficient amount of solvent had evaporated allowing the precursor to ignite. The resulting ash was sieved (100-mesh) and calcined for 20 min to 30 min at 1,200°C to produce the desired single-phase perovskite. Additional material was obtained commercially (Praxair). The following compositions were synthesized ... 

Zirconium acetylacetonate was first prepared by Biltz and Clinch by the reaction of zirconyl nitrate and sodium acetylacetonate in water solution. The compound was crystallized as the 10-hydrate from a slightly acid solution and dehydrated by several crystallizations from alcohol. Von Hevesy and Logstrup later developed a method for the preparation of hafnium acetylacetonate that has been found applicable to the synthesis of the zirconium compound and this forms the basis of the present procedure. 

A similar double microemulsion method for zirconia particle preparation was also reported by Wang etal. [255], where 53 wt% cyclohexane and 35 wt% NP-5/ NP-9 (wt ratio 1 1) were used as the oil (continuous) phase and the surfactant respectively. The water (dispersed) phases in the two microemulsions were 12 wt% of Q.75M zirconyl nitrate and 2.0M ammonia solutions. 

Martinez-Arias et al. [259] prepared Zr-Ce (1 1) mixed oxide (as will be seen below, the product is not a multiple oxide but a solid solution) by a two-microemulsion method. They used the basic reverse micelle system containing Triton X-lOO/heptane/hexanol with an aqueous solution of zirconyl nitrate and cerium(III) nitrate hexahydrate in one microemulsion and tetramethyl ammonium hydroxide in another to serve as the aqueous phase. The mixed system was stirred for 24 h and centrifuged, and the product washed with ethanol. After drying the product, it was calcined first at llO C and then at 500"C. A pseudocubic (t ) phase of zirconia with about 5 nm particle size was the end product. 

A process has been developed by Ayres for the purification of zirconium, in which the various impurities are absorbed upon a cation-exchange resin. The zirconium itself is not absorbed as it is in the colloidal condition. This state is not difficult to achieve with, for example, zirconyl nitrate ZrO(NOs)2, since it is normally hydrolysed to the highly insoluble hydrated oxide in a neutral or near neutral solution. A zirconium ore is therefore broken in concentrated sulphuric acid and the soluble zirconium sulphate converted to the nitrate by suitable means and passed through a column of resin in the usual manner. Amberlite I.R.-100 has been used, in the hydrogen form. Impurities such as iron, beryllium and rare earth elements are absorbed completely, together with about 80 per cent of the titanium. The resin capacity for zirconium, however, is as low as 0-84 mmoles/100 cm of resin, and it is therefore recovered virtually completely in the pure column effluent. The very small amount of zirconium taken up by the resin is probably retained by a surface absorption process rather than true ion-exchange. The zirconium can be precipitated by alkah from the effluent as the hydrated oxide, in massive form, for conversion to other compounds and finally to metal. The resin is regenerated for further use by elution of the cation impurities with, for example, dilute sulphuric acid. 

Selvam, J. J. R Suresh, V. Rajesh, K. Reddy, S. R. Venkateswarlu, Y. Highly efficient nitration of phenolic compounds by zirconyl nitrate. Tetrahedron Lett. 2006, 47, 2507-2509. 

Zr(OCH2CH2CH2CH3)4 Chemical formula of Zirconium -butoxide Zr0(N03)2-5H20 Chemical formula of Zirconyl nitrate Zr(OR)4 Chemical formula for a Zirconium alkoxide... 

The amorphous hydrous zirconia precursor particles that was then calcined to yield Zr02 nanoparticles CO2 Zirconyl nitrate hydrate, aqueous ammonia solution as a precipitating agent PFPE Not reported Particles formed from precursors synthesized atl5.3MPa 1 0-30 nm, quasispherical particles formed from precursors synthesized at [57]... 

The sintering behavior of an amorphous zircon powder synthesized by sol-gel processing has been studied by Veytizou et al. (2002). Gel samples were prepared from a reactive precursor solution of zirconyl nitrate and tetraethoxy silane. N2-adsorption-desorption measurements on the porous precursor powder of surface area 412 m /g indicated the presence of spheroidal mesoporous cavities with narrow necks created by a packing of spherical particles. The precursor powder with irregularly shaped and different sized agglomerates or aggregates had a microporous volmne of 27 mm /g and a... 

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