Acetate anhydrous

Acetates. Anhydrous iron(II) acetate [3094-87-9J, Ee(C2H202)2, can be prepared by dissolving iron scraps or turnings in anhydrous acetic acid ( 2% acetic anhydride) under an inert atmosphere. It is a colorless compound that can be recrystaUized from water to afford hydrated species. Iron(II) acetate is used in the preparation of dark shades of inks (qv) and dyes and is used as a mordant in dyeing (see Dyes and dye intermediates). An iron acetate salt [2140-52-5] that is a mixture of indefinite proportions of iron(II) and iron(III) can be obtained by concentration of the black Hquors obtained by dissolution of scrap iron in acetic acid. It is used as a catalyst of acetylation and carbonylation reactions. 

Other preparations and isolations. If damp methylenedi(nitroformamide) is allowed to stand for several days, the odor of formic acid is noticed, and MEDINA can be isolated from the residue (Ref 11, p 14). The details of scale-up to 150 lb batches, including exp details and flow sheets, and further scale-up with the aim of prodn of 1000 lbs are given. The report describes a fume-off and fire which occurred during the S3rd run. The cause was attributed to a stuck valve which allowed nitric acid to build up in the reactor (Ref 13, p 57). In Ref 16, p 73 there are cost analysis data for pilot plant and large scale prodn, flow sheet for a proposed coml plant, and material balances. The action of acet anhydr on N,Nf-bis(hydroxy-methyl)MEDlNA regenerates MEDINA (Ref 6) the diNa salt of N. N trinitrotrimethylene-diamine, on warming with me ale, ppts the Na salt of MEDINA... 

Other Uses of Nitric Acid. As mentioned earlier, fuming nitric acid (FNA) when mixed with ale, toluene or acet anhydr will cause an expln. However, there are many other uses for FNA in energetic materials technology. As either red fuming nitric acid (RFNA) or as nitrogen tetrox-ide, it is used extensively as the oxidizer in pro-pint systemsnfor ram-jets, jet motors, space rockets and other missiles (Refs 37, 38 39). See also under Liquid Propellants in Vol 7, L24-Rff... 

Was prepd by passing 15% ozone thru a soln of o-xylene in acetic anhydr-ether, cooled to about... 

Schneider and Ziervogel (Ref 2) obtained nitric esters of pectin as intermediate products which were then esterified by means of acet anhydr to the corresponding acetates. In 1949, Rogovin, Treyvas and Shorygina (Ref 5) prepd pectin nitric esters by nitrating pectic acid for 4 hrs at 20° in a mixt composed of 48% HN03,... 

Note. With silyl ketene acetals, anhydrous zinc bromide (lmol%) is the preferred catalyst. 

A good grade of commercial pyridine was used. The reaction can also be carried out under anhydrous conditions (anhydrous cupric acetate, anhydrous methanol) then the pyridine is distilled from potassium hydroxide pellets. The jnelds are similar, and, in fact, water may be added as co-solvent if desired. 

HC1, then crystd from dilute HC1 (charcoal) to remove benzenesulphonic acid. It has been crystd from EtOH/water. Dried in a vacuum desiccator over solid KOH and CaCl2. p-Toluenesulphonic acid can be dehydrated by azeotropic distn with benzene or by heating at 100° for 4h under water-pump vacuum. The anhydrous acid can be crystd from benzene, CHCI3, ethyl acetate, anhydrous MeOH, or from acetone by adding a large excess of benzene. It can be dried under vacuum at 50°. 

Sodium acetate, anhydrous, 197 Sodium acetylide, 896, 899 Sodium amalgam, 194, 769, 964 Sodium anthraqumone-(3 -eulphonate, 981... 

Nitroglycerine is readily dissolved in most organic solvents and itself behaves as a good solvent. Thus, it is completely miscible in all proportions at room temperature with the following liquids methyl alcohol, ethyl acetate, anhydrous acetic add, benzene, toluene, xylenes, phenol, nitrobenzene, nitrotoluenes, pyridine, chloroform, dichloroethane, dichloroethylene, and the like. 

N 54.87% ndls (from eth), columns (from methanol plus eth) mp, deton at 128—-30°. Sol in aniline, warm ethanol, acetic acid, and acetic anhydr sparingly sol in chlf and carbon disulfide insol in benz. Prepn is by reacting a cold Na nitrite soln with an aq soln of thiosemicarbazide hydrochloride. The hydrochloride of the thiotriazole is also an expl 5-Amino-1,2,3t4-Thiotriazole Hydrochloride, CH2N4S+HC1 mw 138.59 N 40.43% cryst mp, deton at 96°. V sol in w Ref Beil 27,781... 

A mixture of 0.212 g (2 mmol) of benzaldehyde lb and 0.13 g (1 mmol) of hydrazine sulfate was placed in an open glass container sodium acetate anhydrous/ calcium chloride (0.3 g+0.3 g) was added and the mixture was irradiated in a mi-... 

Weigha 125-mLErlentneyerflaskonabalanceplacedinthehood,add4.5 gofbrominebya Pasteur pipette (avoid breathing the vapor), and add 50 mL of acetic acid and 0.4 g of sodium acetate (anhydrous). 

To one-half of the diaminonaphthol dihydrochloride solution saved from Section 1 add 3 mL of acetic anhydride, stir vigorously, and add a solution of 3 g of sodium acetate (anhydrous) and about 100 mg of sodium hydrosulfite in 20-30 mL of water. The diacetate may precipitate as a white powder or it may separate as an oil that solidifies when chilled in ice and rubbed with a rod. Collect the product and, to hydrolyze any triacetate present, dissolve it in 5 mL of 10% sodium hydroxide and 50 mL of water by stirring at room temperature. If the solution is colored, a pinch of sodium hydrosulfite may bleach it. Filter by suction and acidify by gradual addition of well-diluted hydrochloric acid (2 mL of concentrated acid). The diacetate tends to remain in supersaturated solution hence, either to initiate crystallization or to ensure maximum separation, it is advisable to... 

Sodium acetate, anhydrous Buffer, pH adjuster, solubilizing agent, stabilizer im... 

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