Zirconium carbonate basic

Zirconium acetylacetonate. See Zirconium tetraacetylacetonate Zirconium ammonium carbonate. See Ammonium zirconium carbonate Zirconium anhydride. See Zirconium oxide Zirconium basic carbonate. See Zirconium carbonate basic... 

Tripropylene glycol Tristearin Zirconium carbonate basic soaps, arsenical taxidermy Sodium arsenite soaps, dry cleaning Isopropanolamine Ricinoleic acid soaps, liq. hand cleaners Potassium oleate soaps, medicinal Iodine... 

Zirconium carbonate basic zirconium oxide precursor, hydrolyzable Zirconium propionate zirconium oxide source Zirconium silicate zirconium source, metallic Zirconium silicate... 

Carbonates. Basic zirconium carbonate [37356-18-6] is produced in a two-step process in which zirconium is precipitated as a basic sulfate from an oxychloride solution. The carbonate is formed by an exchange reaction between a water slurry of basic zirconium sulfate and sodium carbonate or ammonium carbonate at 80°C (203). The particulate product is easily filtered. Freshly precipitated zirconium hydroxide, dispersed in water under carbon dioxide in a pressure vessel at ca 200—300 kPa (2—3 atm), absorbs carbon dioxide to form the basic zirconium carbonate (204). Washed free of other anions, it can be dissolved in organic acids such as lactic, acetic, citric, oxaUc, and tartaric to form zirconium oxy salts of these acids. 

Basic zirconium carbonate is nominally 2Zr02 -C02 -2 112 0 but the Zr02 C02 ratio may range from 4 1 to 1 1 depending on the methods and techniques of preparation. 

Basic zirconium carbonate reacts with sodium or ammonium carbonate solutions to give water-soluble double carbonates. The ammonium double carbonate is nominally NH4[Zr20(0H)2(C02)3]. These solutions are stable at room temperature, but upon heating they lose carbon dioxide and hydrous zirconia precipitates. 

The most common basic sulfate is 5Zr02 ASO 535. [84583-91-5] which is precipitated in good yield when a zirconium oxychloride solution is heated with the stoichiometric amount in sulfate ion. It is used to prepare high purity oxides and ammonium zirconium carbonate. 

Ammonium carbonate solution white precipitate of basic zirconium carbonate, readily soluble in excess of the reagent, but reprecipitated on boiling. 

Studies of the Zr0Cl2-Na2C03-H20 system and the equivalent potassium carbonate (356) and ammonium carbonate (339) systems have led the authors to conclude that the solid phase contains a mixture of basic zirconium carbonates and hydroxocarbonates of composition M[Zr(0H)3C03] and ZrOCOs JiHgO and that the solution phase contains anions of compositions [Zr0(C03)2] " and [Zr(0H)4(C03)2] . The [Zr0(C03) ] anion has also been obtained in a barium salt (31). 

Synonyms Zirconium basic carbonate Zirconium carbonate Zirconyl carbonate... 

One important aspect of such coating processes is the generality of the procedure. It would appear that specific surface characteristics of the preformed particles are not necessarily essential for the successful deposition of the new layer. For example, yttrium basic carbonate coatings were produced on zirconium basic sulfate... 

Pospelova and Zaitsev393 have reported a series of basic carbonate complexes of zirconium in which the metal-to-carbonate ratio varies from 1 1 to 1 3. Typical compositions are M Zr20(0H)6 B(C03)n(H20), (n = 2, 3, 4 or 6) and M Zr20(C03)5(H20), (M =Na, K, NH4, C(NH2)3, etc.). Analogous carbonato-oxalato complexes such as M4Zr20(C03) (C204)6- (H20)x (n = 2 or 4) are also known.396 IR studies have shown that the basic carbonate complexes contain bidentate carbonate ligands,39S but only the 1 3 complexes... 

T. Curtius and A. Darapsky prepared a basic salt, lanthanum hydroxyazide, La(0H)(N3)2l H20, by boiling a soln. of lanthanum nitrate and sodium azide. The white, slimy mass of basic lanthanum azide is obtained by evaporating the mixed soln. in vacuo, or by treatment of the soln. with a mixture of alcohol and ether. They also made rose-coloured didymium hydroxyazide, Dy(OH)(N3)2, by evaporating a soln. of didymium carbonate in hydrazoic acid. Freshly precipitated yttrium hydroxide dissolves in hydrazoic acid, forming a soluble yttrium hydroxyazide boiling a soln. of yttrium sulphate and sodium azide gives a precipitate of yttrium hydroxide. L. M. Dennis found that zirconium hydroxide is precipitated when a soln. of zirconium salt is treated with potassium azide. 

It must also be pointed out that other basic materials have been synthesized which present no surface oxygens and hydroxyls, but other types of active sites whose exact nature remains controversial. These type of solids are, for example, impregnated imides and nitrides on zeolites and alumina, amorphous oxynitrides obtained by treatment with ammonia or aluminium orthophosphate, zirconium phosphate, aluminium vanadate or galloaluminophosphate, and KF supported on alumina/1,3,41 One of the main advantages of these solids with respect to basic oxides is their resistance to carbon dioxide or water. 

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