cyclohexane


Also found in: Dictionary, Wikipedia.

cyclohexane

(sī'kləhĕk`sān), C6H12, colorless liquid hydrocarbon. It is a cyclic alkane that melts at 6°C; and boils at 81°C;. It is nearly insoluble in water. Cyclohexane is found naturally to some extent in petroleum but is prepared commercially by catalytic hydrogenation of benzene. It is widely used as a solvent and in making certain compounds used in the preparation of nylon.

Cyclohexane

 

a saturated alicyclic hydrocarbon. A cycloalkane, cyclohexane has the structural formula

It is a colorless liquid with a characteristic odor. It has a melting point of 6.55°C, a boiling point of 80.74°C, and a density of 0.778 g/cm3 at 20°C. Insoluble in water, cyclohexane is miscible with ether, acetone, and benzene. It has two possible conformations —the “boat” and “chair” forms; the latter predominates at normal temperatures.

Cyclohexane is a component of virtually all petroleums, but it is present only in small amounts. It is therefore produced in industry mainly by the catalytic hydrogenation of benzene. It is used as a raw material for the production of cyclohexanol and cyclohexanone (by oxidation with oxygen), nitrocyclohexane (by the action of 30-percent nitric acid or nitrogen dioxide), and cyclohexanone oxime (by nitrosation using NOCl); all of these substances are intermediates in the production of caprolactam and adipic acid by catalytic oxidation. Both caprolactam and adipic acid are used in the production of polyamides.

cyclohexane

[¦sī·klō′hek‚sān]
(organic chemistry)
C6H12 A colorless liquid that is a cyclic hydrocarbon synthesized by hydrogenation of benzene; used in organic synthesis. Also known as hexamethylene.
References in periodicals archive ?
A form of the finite IGC method was used to evaluate the effect of water on the behavior of cyclohexane and 1-octene in low density polyethylene.
Firstly, they show that cyclohexane and R-227ea have always the highest and lowest efficiencies, respectively, among the other examined working fluids.
1999a, "Growth of organic solvent-tolerant Pseudomonas aeruginosa LST-03 in the presence of various organic solvents and production of lipolytic enzyme in the presence cyclohexane," Biochem.
The oxidation of cyclohexane is carried out industrially at a temperature of 150-180[degrees]C and pressure of 1.
Paul Booth, president of Sabic UK Petrochemicals, says: "On Teesside, Sabic UK Petrochemicals remains fully committed to its Olefins Cracker operations at Wilton, Cyclohexane production at North Tees and to continuing its investment in the major Low Density Polyethylene (LDPE) project at Wilton.
C[pounds sterling]On Teesside, Sabic UK Petrochemicals remains fully committed to its olefins cracker operations at Wilton and cyclohexane production at North Tees.
Paul Booth, president of SABIC UK Petrochemicals, commented: "On Teesside, SABIC UK Petrochemicals remains fully committed to its Olefins Cracker operations at Wilton, Cyclohexane production at North Tees and to continuing its investment in the major Low Density Polyethylene (LDPE) project at Wilton.
Mr Booth said: "On Teesside, Sabic UK Petrochemicals remains fully committed to its olefins cracker operations at Wilton, cyclohexane production at North Tees and to continuing its investment in the major low density polyethylene project at Wilton.
By changing the solvent from cyclohexane to pentane and other n-alkanes, different sized luminescent silica nanoparticles have been synthesized with a highly reproducible results and a uniformed size distribution.
ASTM has also announced revisions to the standard D 1555, "Test Method for Calculation of Volume and Weight of Industrial Aromatic Hydrocarbons and Cyclohexane," and its metric equivalent, D 1555M.
Although fermentation of benzoate to cyclohexane carboxylate and acetate by a pure culture of S.
Two solutions of stable emulsions (water-inoil) are prepared and mixed to form precipitates, using cyclohexane as the continuous oil phase and aqueous solutions of Pb2+, Zr4+, Ti4+ ions and KOH as the suspending droplets.