Methylene Diphenyl Diisocyanate (MDI) CAS:101-68-8 MDI is produced by a 4 steps reaction based on benzene as feedstock. There are 3 isomers of MDI : 2,2-MDI, 2,4-MDI, and 4,4-MDI. The 4,4 isomer is known as pure or monomeric MDI (mMDI).The Polymeric MDI so called Crude MDI contains monomeric MDI and products with higher MW (pMDI). […]
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Cyclohexane also known as CYX, hexamethylene, hexahydrobenzene, hexanaphthene, and benzenehexahydride is a colourless, volatile, and flammable liquid with the molecular formula C6H12, CAS: 110-82-7. It has a mild odour and is insoluble in water but soluble in alcohol, ether, acetone, benzene, and ligroin. Cyclohexane occurs naturally in petroleum crude oil, volcanic gases and cigarette smoke.
Cyclohexane can be produced by two methods. The first is the catalytic hydrogenation of benzene using rhodium on carbon, and the second method is via fractional distillation of petroleum.
It has a specific gravity of 0.78 and a flashpoint of -20° C and is highly flammable
Cyclohexane is used predominately in the nylon industry where approximately 90% of it is consumed in the industrial production of adipic acid and caprolactam, which are themselves used to generate nylon6 and nylon6.6. The rest is used both as a solvent for paints, resins, varnish and oil, and as a plasticiser. Cyclohexane can also be used as an intermediate in the manufacture of other industrial chemicals such as cyclohexanone and nitrocyclohexanone.