Acetate of lime

Acid—Base Chemistry. Acetic acid dissociates in water, pK = 4.76 at 25°C. It is a mild acid which can be used for analysis of bases too weak to detect in water (26). It readily neutralizes the ordinary hydroxides of the alkaU metals and the alkaline earths to form the corresponding acetates. When the cmde material pyroligneous acid is neutralized with limestone or magnesia the commercial acetate of lime or acetate of magnesia is obtained (7). Acetic acid accepts protons only from the strongest acids such as nitric acid and sulfuric acid. Other acids exhibit very powerful, superacid properties in acetic acid solutions and are thus useful catalysts for esterifications of olefins and alcohols (27). Nitrations conducted in acetic acid solvent are effected because of the formation of the nitronium ion, NO Hexamethylenetetramine [100-97-0] may be nitrated in acetic acid solvent to yield the explosive cycl o trim ethyl en etrin itram in e [121 -82-4] also known as cyclonit or RDX. 

Acetyl chlotide was formerly manufactured by the action of thionyl chlotide [7719-09-7], CI2OS, on gray acetate of lime, but this route has been largely supplanted by the reaction of sodium acetate or acetic acid and phosphoms ttichlotide [7719-12-2] (24). A similar route apparently is stiU being used in the Soviet Union (25). Both pathways ate inherently costly. 

Calcium Acetate(Acetate of Lime), (CHjCOO) Ca, mw 158.17. Cryst from w as col ndls contg 2 mo Is of water of crystn. The transition of the di- to the monohydrate(89.77% of anhyd salt) takes place at 84°. The normal commercial salt contains 82-85% of anhyd salt. 

SYNS ACETATE of LIME BROWN ACETATE CALCIUM DIACETATE GRAY ACETATE LIME ACETATE LIME PYROLIGNITE SORBO-CALCIAN SORBO-CALCION TELTOZAN VINEGAR SALTS... 

Acetate of Lime.—One cord of wood will give from 180 to 220 gal. of solution which is usually concentrated from about 6 to 28 per cent and sometimes as high as 30 per cent solids. With a steam pressure of 5 lb., and a vacuum of 27 in., the capacity is from to 2 gal. per square foot in double or triple effects of the vertical-tube or rapid-circulation type. Evaporator shells are made of cast iron with copper or steel tubes. 

For smaller installations, the concentration of the crude pyroligneous acid and acetate of lime is done in a double-effect evaporator, with the acid in the second effect. 

Derivation Action of pyroligneous acid on calcium hydroxide the solution, on being filtered and evaporated to dryness, yields gray acetate of lime. 

Aluminium acetate, known as red liquor, or mordant rouge, is used in dyeing for the production of red colour. One method of preparation is to add a solution of alum to acetate of lime liquor. The lime is precipitated as sulphate, its place being taken by the aluminium forming the acetate. 

To obtain ordinary commercial acetic add, acetate of lime is mixed with calcium chloride in proper proportions, and the solution concentrated until it crystallizes. The mother liquid is poured off and concentrated with the production of a second crop of crjstals this is repeated Until about four crops have been obtained. The crystals are then dissolved in water, filtered through animal charcoal mixed with about 10 per cent, of calcium chloride and recr . S callized. The crystals are distilled with a mixture of T part sulphuric acid of specific gravity i S4 and 2 parts water, and the resulting acetic acid concentrated. This acid should contain 33 per cent, by weight of hydrogen acetate. 

Acetate of lime, natural Acetone, natural Annato extract Brazilwood extract Brewers pitch, product of softwood distillation... 

Acetone, a valuable solvent for oils, and employed largely in the manufacture of explosives, is found in the free state in the products of the destructive distillation of wood, and is obtained by the dry distillation of acetate of lime, which substance is also produced from pyroligneous acid. 

The salt obtained by evaporating the solution to dryness is called gray acetate of lime. Commercial acetic acid is obtained from the calcium acetate so prepared by distilling with concentrated hydrochloric acid in copper stills. The acid is a slightly-colored liquid which contains about 50 per cent of acetic acid. It may be further purified by redistilling over a little potassium bichromate, which oxidizes some of the impurities, and by filtering through charcoal. 

Acetate fast yellow G. See Disperse yellow 3 Acetate of lime. See Calcium acetate Acetate PA. See Allyl phenoxyacetate 1-Acetate-1,2,3-propanetriol. See Glyceryl acetate... 

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