I acetone

Reactions.—i. Acetone gives the iodoform reaction like ethyl alcohol (p. 50). 2. Dissolve a few crystals of /-bromophenyl-... 

IS solv I, acetone(20.8g) solv II, acetonitrile 5.0Fe/AC with acetone and acetonitrile. 

Although acetone was a major product, it was not observed by infrared spectroscopy. Flowing helium/acetone over the catalyst at room temperature gave a prominent carbonyl band at 1723 cm 1 (not show here). In this study, a DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy) cell was placed in front of a fixed reactor DRIFTS only monitored the adsorbed and gaseous species in the front end of the catalyst bed. The absence of acetone s carbonyl IR band in Figure 3 and its presence in the reactor effluent suggest the following possibilities (i) acetone formation from partial oxidation is slower than epoxidation to form PO and/or (ii) acetone is produced from a secondary reaction of PO. 

Acetic acii Acetoin FrCA°87 Acetol Sd Al i Acetone ... 

The enzyme may show I acetone an abnormal Km or Vmax for substrates or coenzymes. 

Figure 28-6 Energy profile for the thermal dissociation of 3,3,4,4-tetra-methyldioxacyclobutane, 8, to acetone, showing that the transition state is above the threshold required to produce either excited singlet (S,) or triplet (I,) acetone.

Figure 1.2. Isolation of the cyclosporins A-Z. (a) Sephadex LH-20, methanol (b) silica-gel, water-saturated ethyl acetate (c) silica-gel, hexane I acetone (2 1) (d) silica-gel, chloroform/methanol (98 2) (e) silica-gel, diethyl ether/methanol (95 5) (f) silica-gel, methylene chloride/methanol (96 4) ...

The boundary curves for the systems CA-I-acetone-water and CA-11-dioxane-water are shown in Fig.3.(a,b). 

Until World War I acetone was manufactured commercially by the dry distillation of calcium acetate from lime and pyroligneous acid (wood distillate) (9). During the war processes for acetic acid from acetylene and by fermentation supplanted the pyroligneous acid (10). In turn these methods were displaced by the process developed for the bacterial fermentation of carbohydrates (cornstarch and molasses) to acetone and alcohols (11). At one time Pubhcker Industries, Commercial Solvents, and National Distillers had combined bio fermentation capacity of 22,700 metric tons of acetone per year. Bio fermentation became noncompetitive around 1960 because of the economics of scale of the isopropyl alcohol dehydrogenation and cumene hydroperoxide processes. 

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