Naphtha furan

Several substituted benzo[ ]furans were synthesized efficiently in one-pot procedures by reaction of salicyaldehydes and ethyl diazoacetate in the presence of HBF/EtjO in high yields as shown below. A plausible mechanism was also given <0681711>. Two types of naphtha[2,3-fc]furan derivatives were made respectively by Lewis acid and HCl catalyzed ring cyclizations <06T8045>. AuBrj-catalyzed [4+2] benzannulation between enynal units and enol ethers was also applied to prepare benzo[Z)]furans <06JOC5249>. 

A direct one-pot synthesis of naphtha[2,3-b]furan, 9-dione daivalives was recorded via C,0-dialkylation of p-dicarbonyl with 2,3-dichloro-l,4-naphthoquinones<05S1605>. 

Desulfurization of petroleum feedstock (FBR), catalytic cracking (MBR or FI BR), hydrodewaxing (FBR), steam reforming of methane or naphtha (FBR), water-gas shift (CO conversion) reaction (FBR-A), ammonia synthesis (FBR-A), methanol from synthesis gas (FBR), oxidation of sulfur dioxide (FBR-A), isomerization of xylenes (FBR-A), catalytic reforming of naphtha (FBR-A), reduction of nitrobenzene to aniline (FBR), butadiene from n-butanes (FBR-A), ethylbenzene by alkylation of benzene (FBR), dehydrogenation of ethylbenzene to styrene (FBR), methyl ethyl ketone from sec-butyl alcohol (by dehydrogenation) (FBR), formaldehyde from methanol (FBR), disproportionation of toluene (FBR-A), dehydration of ethanol (FBR-A), dimethylaniline from aniline and methanol (FBR), vinyl chloride from acetone (FBR), vinyl acetate from acetylene and acetic acid (FBR), phosgene from carbon monoxide (FBR), dichloroethane by oxichlorination of ethylene (FBR), oxidation of ethylene to ethylene oxide (FBR), oxidation of benzene to maleic anhydride (FBR), oxidation of toluene to benzaldehyde (FBR), phthalic anhydride from o-xylene (FBR), furane from butadiene (FBR), acrylonitrile by ammoxidation of propylene (FI BR)... 

Early methods of separation employed such solvents as oleic acid/ crude coal-tar solvent naphtha, light pyridine,5 etc. Based on the selective solution of phenanthrene by the coal-tar naphtha, and of carbazole liy the light pyridine, Clark proposed a complicated scheme for the separation and recovery of all three of these constituents. Recently, organic liquid compounds containing the furan nucleus have been found to have a highly selective solvent action on phenanthrene and carbazole." Thns, furfural while dissolving phenanthrene and carbazole does not have a marked solvent action on anthracene at low temperatures. However, at elevated temperatures it does dissolve anthracene with the result that it is possible... 

Chem. Descrip. Methyl methacrylate/modified PVC-based polymer Uses Heat-sealing raw material for pkg. of foods and pharmaceuticals adhesive/bonding agent for finishing PVC leatherette and film binder in printing inks and spray paints for PVC, ABS, PS coatings and films Properties Bead in powd. form sol. in ethyl acetate, MEK, acetone, cyclohexanone, butyl acetate, butyl glycol acetate, aromatics, tetrahydro-furan, chlorinated hydrocarbons insol. in naphtha and alcohols dens. 1.36 g/cm reduced vise. 45-55 em /g (20 C)... 

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