Toluene → Ethylbenzene

HRID 580098Notes

Reaction equation

HRID 580098 reaction equation
[C:1]1([CH3:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:8]1([CH3:15])[C:9]([CH3:14])=[CH:10][CH:11]=[CH:12][CH:13]=1>S(=O)(=O)(O)O>[CH2:7]([C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1)[CH3:8].[CH2:1]=[CH:15][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.[CH2:14]1[C:9]2[C:8](=[CH:13][CH:12]=[CH:11][CH:10]=2)[CH2:15][CH2:2][CH2:1]1

Participants

6

Reactant 2

HCID 1140TolueneHCID 7237O-Xylene

Product 3

HCID 7500EthylbenzeneHCID 7501StyreneHCID 8404Tetralin

Reagents, catalysts & solvents 1

HCID 1118Sulfuric AcidCatalyst

Procedure

Both about 200 g of a fraction containing 99% of compounds having at least four aromatic rings, the compounds having been obtained by alkylation of toluene, xylene and ethylbenzene with styrene in the presence of a sulfuric acid catalyst, and about 200 g of tetralin were charged in a one-liter autoclave, followed by charging therein hydrogen at an initial pressure of 100 kg/cm2G and reacting the whole mass at 430° C. for 240 minutes. The resultant decomposition product was subjected to distillation to obtain a fraction boiling at 300° to less than 400° C. and a fraction boiling at 400° to 450° C. Both fractions were mixed in a ratio of 3:2 so that the mixture had a viscosity of about 30 cSt. at 40° C. The mixed fraction was subjected to nuclear hydrogenation under an initial hydrogen pressure of 70 kg/cm2G in the presence of a rhodium-active carbon catalyst at 100° to 200° C. for about 11 hours and then filtered under reduced pressure through a glass filter to remove the catalyst, thereby obtaining a traction drive fluid.

Sources & evidence

ORD record
ord-062bc83f20a0475aba440077894461cb
Source dataset
uspto-grants-1988_06
Patent number
US04751335

Reaction notes

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