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reason it is always present in crude wood spirit, from which the greater portion of it may be re-covered by fractional distillation. On the large See also:

scale it is pre-pared by the dry distillation of See also:

CALCIUM [symbol Ca, atomic weight 40.0 (o= x6)]

calcium acetate (CH3CO2)2Ca= CaCO3+CH3000H3. E. R. Squibb (Journ. Amer. Chem. See also:

Soc., 1895, 17, p. 187) manufactures it by passing the vapour of acetic See also:

ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid through a rotating See also:

IRON [symbol Fe, atomic weight 55.85 (0=16)]

iron See also:

CYLINDER (Gr. KvAwSpos, from KvXivaety, to roll)

cylinder containing a mixture of See also:

PUMICE (Lat. purnex, spumex, spuma, froth)

pumice and precipitated See also:

BARIUM (symbol Ba, atomic weight 137'37 [0=16])

barium carbonate, and kept at a temperature of from 500° C. to 600° C. The mixed vapours of acetone, acetic acid and See also:

WATER

water are then led through a. condensing apparatus so that the acetic acid and water are first condensed, and then the acetone is condensed in a second See also:

VESSEL (O. Fr. vaissel, from a rare Lat. vascellum, dim. of vas, vase, urn)

vessel.

The barium carbonate used in the See also:

PROCESS

process acts as a contact substance, since the temperature at which the operation is carried out is always above the decomposition point of barium acetate. Crude acetone may be purified by converting it into the crystal-See also:

LINE

line See also:

SODIUM [symbol Na, from Lat. natrium; atomic weight 23.00 (0=16)]

sodium bisulphite See also:

compound, which is separated by filtration and then distilled with sodium carbonate. 2 CHa\C< +Na2CO3=2CH3>C0+2Na2S03+See also:

CO2+H20. See also:

CH3/ S03Na CH3 It is then dehydrated and redistilled. Acetone is largely used in the manufacture of See also:

CORDITE

cordite (q.v.). For this purpose the crude distillate is redistilled over sulphuric acid and then fractionated. Acetone is a colourless See also:

MOBILE

mobile liquid of pleasant See also:

SMELL (connected etymologically with " smoulder " and " smoke ")

smell, boiling at 56.53°C., and has a specific gravity o• 819 (o%4° C.) . It is readily soluble in water, See also:

ALCOHOL

alcohol, See also:

ETHER, (C2H5)2O

ether, &c. In addition to its application in the cordite See also:

INDUSTRY (Lat. industria, from indu-, a form of the pre, position in, and either stare, to stand, or struere, to pile up)

industry, it is used in the manufacture of See also:

CHLOROFORM (trichlor-methane), CHC13

chloroform (q.v.) and See also:

SULPHONAL

sulphonal, and as a solvent. It forms a See also:

HYDRAZONE

hydrazone with phenyl See also:

HYDRAZINE (DIAMIDOGEN), N2H4

hydrazine, and an oxime with hydroxyl-amine. Reduction by sodium See also:

AMALGAM

amalgam converts it into isopropyl alcohol; oxidation by chromic acid gives See also:

CARBON (symbol C, atomic weight 12)

carbon dioxide and acetic acid. With See also:

AMMONIA (NH3)

ammonia it reacts to See also:

FORM (Lat. forma)

form di- and triacetoneamines.

It also unites directly with hydrocyanic acid to form the nitrile of a-oxyisobutyric acid. By the See also:

ACTION

action of various reagents such as See also:

lime, See also:

CAUSTIC (Gr. rcavvraubs, burning)

caustic potash, hydrochloric acid, &c., acetone is converted into condensation products, mesityl See also:

OXIDE

oxide C6H160, phorone C9H140, &c., being formed. On distillation with sulphuric acid, it is converted into mesitylene C9H12(symmetrical trimethyl See also:

BENZENE, C6H6

benzene). Acetone has also been used in the artificial See also:

PRODUCTION (Lat. productionem, from producere, to pro-duce)

production of See also:

INDIGO (earlier indico, from Lat. indicum, the Indian sub-stance or dye; the Sans. name was niti, from nila, dark blue, and this through Arab. al-nil, annil, gives " aniline ")

indigo. In the presence of See also:

IODINE (symbol I, atomic weight '26.92)

iodine and an See also:

ALKALI

alkali it gives See also:

IODOFORM, CHI3

iodoform. Acetone has been employed medicinally in cases of dyspnoea. With See also:

POTASSIUM [symbol K (from kalium), atomic weight 39.114 0=16)]

potassium iodide, See also:

GLYCERIN, GLYCERINE

glycerin and water, it forms the preparation spirone, which has been used as a spray inhalation in paroxysmal See also:

SNEEZING (0. Eng. fneosung, from fneosan, to sneeze, cf. Dutch fniezen, allied to the obsolete neeze, and ultimately to be referred to root seen in Gr. irveiv, to breathe; the initial s is due to association with numerous words, such as snort, snuff, snor

sneezing and See also:

ASTHMA (Gr. avBµa, gasping, whence lio-Ogaivw, I gasp for breath)

asthma.

End of Article: ACETONE, or DIMETHYL KETONE

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