Titanic acid

Dicarboxyhc acids, eg, succinic or adipic, do not dissolve titanic acid. A phthalate has been prepared by adding acidic titanium sulfate solution to sodium phthalate solution. 

Titan-s ure, /. titanic acid. -sMureonhydrid, n. titanic anhydride, titanium dioxide (TiOj). -schwefelsdure,/. titanosulfmic acid, -stahl, m. titanium steel, -stickstoff, m. titanium nitride, -verbindung, /. titanium compound, -weiss, n. titanium white. 

Titanium Dioxide (Titania, Titanium White, Rutile, Anatase, Brookite, Titanic Anhydride, Titanic Acid Anhydride, Titanic Oxide). Ti02, mw 79.90, Selected Parameters of the Allotropic Forms of Ti02... 

Synonyms titanic oxide titanic acid anhydride titanium anhydride titania titanium white... 

This report, which was entitled "Chemical investigation of the residues of Ural platinum ore and of the metal ruthenium, occupied one hundred and eighty-eight pages in the Scientific Annals of Kazan University for 1844. In the following year it was published in book form. For patriotic reasons and also in recognition of the earlier work of Professor Osann, Klaus retained the name ruthenium, which means Russia. The white substance which Osann had taken for the oxide of this new metal consisted chiefly of silicic and titanic acids, iron peroxide, and zirconia (37). Klaus also found ruthenium in the osmiridium from American ores (36, 128). It constituted only from 1 to l1/o per cent of these residues and did not occur in the portion which is soluble in aqua regia (126). 

The specimen Scheerer analyzed was given to him by Professor B. M. Keilhau (51). Using a very small sample, Scheerer made an appioximate quantitative analysis, from which he reported the presence of tantalic and titanic acids, yttria, uranous, cerous, and lanthanum oxides, lime, magnesia, and water. He named the mineral euxenite because of... 

Analytical Delicate qual tests for H202 are its reactions with titanic chromate or sulfate in acid to produce the bright blue peroxychromic or bright yellow peroxy titanic acid both of which are sol in ether. Quantitatively H202 may be detd by its oxidation of I- and titration of the I2 (or I3) thus formed (Ref 2)... 

Titanium forms three series of salts in which the element is respectively tetra-, tri-, and mono-valent. Thus, titanium and chlorine form titanium tetrachloride, TiCl4, titanium trichloride, TiCl3, and titanium monochloride, TiCl. The two last are unstable and readily pass into the higher chloride. Titanium tetrachloride shows a marked resemblance to tin tetrachloride it unites easily with hydrochloric acid in solution, with formation of the complex acid, ehloro-titanic acid, [TiCl6]tI2, and forms many crystalline products with other chlorides. It also unites with ammonia, forming ammines. 

Hexammino-titanic Chloride, [Ti(NH3)6]Cl4, is prepared by allowing a stream of dry hydrogen saturated with gaseous titanic chloride to come in contact with dry ammonia gas in a specially designed flask. A voluminous yellow powder remains, which is unaltered in dry air, and does not lose its yellow colour over freshly ignited calcium chloride in absence of air. Water decomposes the substance, with formation of titanic acid and ammonium chloride thus ... 

Rosenheim described a tetrammino-derivative, TiCl NHj, which he obtained by allowing the product from the action of dry ammonia on an ethereal suspension of titanic chloride to stand over dry calcium chloride. The substance so obtained was white, but further examination proved it to be a mixture of titanic acid and ammonium chloride produced by moisture in the air and in the imperfectly dried calcium chloride. 

Pyridino-chloro-titanic Acid, (C5H3N)2.H2TiCl6, is deposited from a solution of pyridine hydrochloride and titanic chloride in hydrochloric acid as a yellow powder which decomposes on exposure to air or when treated with water. The corresponding quinoline derivative is more stable. 

Pyridino-bromo-titanic Acid, (CsHsN)2.H2TiBr6, is formed by saturating a solution of pyridine hydrobromide and titanic acid in alcoholic hydrobromic acid with hydrogen bromide.1... 

Titanic Acid. Add a 10% ammonia solution to 10 ml of a solution of titanium tetrachloride in hydrochloric acid with constant stirring up to the complete precipitation of titanic acid. Let the precipitate settle, pour off the solution, and rinse it several times with water by decantation. 

See how titanic acid reacts with 10% solutions of acids and alkalies. Shake a small amount of titanic acid in a test tube with water and boil it. Pour oft the water and again see how the titanic acid reacts with acids and alkalies. How and why did the reactivity of the titanic acid change ... 

Put a small amount of the titanic acid on the lid of a crucible, dry it in a drying cabinet, and then roast it. What is obtained Write the equation of the reaction. How does the colour of the preparation change when roasted Is the previous colour restored after the substance has been cooled Dry the remaining amount of the titanic acid in the air and hand it in to the laboratory assistant. 

What hydrates are called alpha- and beta-titanic acids, how are they prepared, and what are their properties How, having at hand titanium(IV) oxiue, can you prepare potassium titanate and titanyl sulphate ... 

The Ziegler-Natta catalysts are prepared by the reduction of TiIV compounds, e.g., TiCl4 or esters of titanic acid, by organoaluminum compounds. A higher catalyst activity and thus an improved polymer color is achieved by the use of MgCh as support component. 

Thus, the above mentioned additives, as well as the refining of the esters, can be eliminated. The use of auxiliary liquids is also unnecessary. The esterification process patented in the Federal Republic of Germany in 1951 (6) now makes it possible (besides other processes developed on a similar basis (16, 22)) to produce plasticizer esters of excellent quality, simply and cheaply. In this connection we should like to mention the use of titanic acid esters as esterification and trans-esterification catalysts known since 1955 (29), and 1951 (15). 

Stable selenium sols may be obtained by the reducing action of quadrivalent titanium. If a solution of titanium trichloride (1-5 per cent.) is boiled for some time, hydrolysis and oxidation occur on addition of this solution to one of selenium dioxide (0-2 per cent.) reduction to selenium occurs and any unchanged titanic acid, Ti(OII)4, remains in colloidal solution and exerts a protective action.4... 

Chemical Properties. Titanium dioxide is amphoteric with very weak acidic and basic character. Accordingly, alkali-metal titanates and free titanic acids are unstable in water, forming amorphous titanium oxide hydroxides on hydrolysis. 

The removal of titanium from mixed niobic and tantalic acids is a difficult matter. Although titanium and niobium compounds display considerable differences in their general behaviour, when the two elements occur together they appear to undergo a change, in consequence of which they become difficult to separate. Niobic acid, for instance, is precipitated from a much more concentrated boiling sulphuric acid solution than is titanic acid but when the two acids are dissolved... 

Titanyl Arsenate has been described6 as a floeeulent precipitate formed by adding aqueous arsenic acid to a solution of titanic acid in hydrochloric add made as nearly neutral as possible. It is soluble in excess of either titanic or hydrochloric acid. The composition of the product has not been verified. 

O 18.80% ndls (from petr eth), mp 96.5°, bp 103° at 1.2mm, d 1.15 at 4° was obtd by bubbling O thru coml decalin at the rate of 5cc per min under UV radiation for 200 hrs at 70°. The hydroperoxide liberates iodine from HI solns, colors titanic acid solns, and after treatment with CHzO decolorizes an alk soln of methylene blue (Refs 2 3)... 

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