Zirconium oxide, hydrated

Hydrous Oxides and Hydroxides. Hydroxide addition to aqueous zirconium solutions precipitates a white gel formerly called a hydroxide, but now commonly considered hydrous zirconium oxide hydrate [12164-98-6], 7 0 - 112 0. However, the behavior of this material changes with time and temperature. 

Zirconium (IV) oxide is formed when zirconium oxide hydrates or zirconium salts of volatile, oi rgen-containing acids (nitrates, oxalates, acetates, etc.) are dehydrated and then calcined. 

Zirconium oxychloride is an important intermediate from which other zirconium chemicals are produced. It readily effloresces, and hydrates with 5—7 H2O are common. The salt caimot be dried to the anhydrous form, and decomposes to hydrogen chloride and zirconium oxide. 

Aqueous solutions of zirconium oxide dinitrate [13826-66-9] (zirconium oxynitrate) and zirconium oxychloride behave very similarly these two compounds have been cocrystallized in soHd solution (202) where ZrO(N03 -5H2 O was the stable hydrate. 

Kobayashi, E., Sugai, M., Imajyo, S., Adsorption of arsenate ion by the zirconium(iv) oxide hydrate active carbon complex. Nihon Kagaku Kaishi 1984, 656-660. 

The other abrasive agents used are tin oxide, chromic oxide, sand, carbides (silicon carbide and boron carbide), zirconium silicate, zinc oxide, garnet, rouge (fine red powder of iron oxide), kieselgurh, tripoli, magnesium oxide, hydrated silica etc. 

Zirconium Oxide Chloride Zirconium Oxychloride Zirconium Oxychloride Hydrate Zirconium Sulfate Zirconium Sulfate Tetrahydrate Zirconyl Chloride... 

Precipitation of the coating from aqueous solutions onto the suspended Ti02 particles. Batch processes in stirred tanks are preferred various compounds are deposited one after the other under optimum conditions. There is a very extensive patent literature on this subject. Continuous precipitation is sometimes used in mixing lines or cascades of stirred tanks. Coatings of widely differing compounds are produced in a variety of sequences. The most common are oxides, oxide hydrates, silicates, and/or phosphates of titanium, zirconium, silicon, and aluminum. For special applications, boron, tin, zinc, cerium, manganese, antimony, or vanadium compounds can be used [2.40], [2.41],... 

Zirconium oxide, Zr02 is widely known, both as a mineral, baddeleyite, and as an industrial product obtained horn zircon, Z1SO4. Moreover, the precipitate obtained by action of alkali hydroxides upon solutions of tetravalent zirconium is a hydrated oxide. The latter is readily soluble in acids to form oxysalts, which arc usually formulated in terms of the Zr02+ ion, without including its water of hydration, e.g., as Zr0(H2P04)2. The hydrated Zr02+ ion is not amphiprotic it does not dissolve in alkali hydroxides, While it does react on alkali carbonate fusions, the compounds formed have been shown to be mixed oxides rather than zirconates. 

The XRD spectra of the Sn02 catalysts showed the degree of crystallization of the sulfated Sn02 to be much lower than that of SnO, without the sulfate treatment (145). The analogous phenomena were also observed with the Zr02 and Ti02 catalysts (129). Amorphous hydrated zirconium oxide crystallizes at 410°C, and the Zr02 heat treated at 500°C consists of... 

According to XRD, the initial anhydrous zirconium oxide is a monoclinic crystalline modification of Zr02 anhydrous silicon oxide and hydrated zirconium and silicon oxides are X-ray amorphous substances. Fig. 

Inorganic ion exchangers include both naturally occurring materials such as mineral zeolites (sodalite and clinoptilolite), the greensands, and clays (themontmorillonite group) and synthetic materials such as gel zeolites, the hydrous oxides of polyvalent metal (hydrated zirconium oxide) and the insoluble salts of polybasic acids with polyvalent metals (zirconium phosphate). 

Zr0Cl2-8H20 Zirconium oxychloride 8-hydrate, 2 121 Zr02 Zirconium oxide, 3 76... 

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