Cumene


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Related to Cumene: cumene hydroperoxide

cumene

[′kyü‚mēn]
(organic chemistry)
C6H5CH(CH3)2 A colorless, oily benzenoid hydrocarbon cooling at 152.4°C; used as an additive for high-octane motor fuel.

Cumene

 

(also isopropylbenzene), C6H5CH(CH3)2, a colorless liquid with a pleasant odor. Melting point, —96.03°C; boiling point, 152.39°C; density, 0.8618 g/cm3 (at 20°C); and refractive index, nD20, 1.4913.

Cumene is readily soluble in organic solvents and poorly soluble in water. It forms explosive vapor-air mixtures (flash point, 38°C). Internal introduction of cumene leads to acute and chronic damage of the hematopoietic organs. Cumene is obtained by vapor-phase (in the presence of phosphoric acid) or liquid-phase (in the presence of AlCl3) alkylation of benzene by propylene. Cumene is used as a solvent and a high-octane additive to aviation gasolines; it is also used in the production of phenol and acetone.

References in periodicals archive ?
The Asia-Pacific is the largest benzene market, which consumed more than 45.0% of the total demand in 2012, and also for most of its derivatives that include ethylbenzene, cyclohexane, cumene, nitrobenzene, and alkylbenzene.
Changing the substrate with another one having lower [k.sub.p] and 2[k.sub.t] such as cumene usually overcomes this problem.
LLC (Saint Louis, MO, USA); as well as the antioxidant standard 6-hydroxy2,5,7,8-tetramethylchroman-2- carboxylic acid (Trolox, Lot: BCBJ8170V), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS, Lot: 061M538V), potassium persulfate ([greater than or equal to] 99%, Ref: 216224), Cumene hydroperoxide ([greater than or equal to] 99%, Ref: 247502), 3-(4,5-dimethyl-2-thiazolyl)2,5- diphenyl-2H-tetrazolium bromide (MTT), tert-butyl hydroperoxide (t-BuOOH, Lot: BCBJ2885V), 2,2'-azobis(2-methylpropionamidine) dihydrochloride (AAPH, Ref.
The amount of cumene hydroperoxide (CHP) equivalents induced by different systems is shown in Figure 1.
GPx was measured by NADPH oxidation, using a coupled reaction system consisting of GSH, GR, and cumene hydroperoxide (Tappel 1978).
The cross-linking of the unsaturated polyester with styrene was then initiated by adding 0.12 g of cumene hydroperoxide and 0.01 g of ferrous sulphate.
* Cumene industry supply scenario in France from 2005 to 2019, comprising plant capacity growth and installed plant capacity by production process and technology
Cumene is used in the production of phenol, acetone and alpha-methylstyrene, all of which are building blocks for a range of everyday products including plywood and oriented strand board, engineered plastics, pharmaceuticals, and paints, acrylics and varnishes.
Thymol, p-cumenol and gamma-terpinene proved to be excellent free-radical scavengers followed by S-(+)-carvone, R-(-)-carvone and 4- methoxy cumene, whereas, cuminal, cuminyl alcohol and p-cymene showed weak activity as shown in Table-1.
Three substances have been added as reasonably anticipated to be human carcinogens: 1-bromopropane, used as a cleaning solvent and spray adhesive; cumene, used to make phenol and acetone, and also found in fuel products and tobacco smoke; and the wood preservative mixture pentachlorophenol.
Furthermore, the aromatics plant will also produce mixed xylenes like toluene, orthoxylene and meta-xylene from the integrated BTX units, as well as cumene, glycols, phenol, export LPG and light naphtha.