1-ethylanthracene-9,10-dione

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 1.75-liter continuously stirred tank-type reactor with internal filters to retain the catalyst inside the reactor, operating at a volume of 1.25 liters, a temperature of 43°-45° C. and pressure of 15 psig, a working solution was circulated at a flow rate of 50 ml/min. The working solution initially contained 18 wt % ethylanthraquinone, of which 45 wt % was tetrahydroethylanthraquinone, 58 wt % of an aromatic solvent (alkylated benzenes - heavy naphtha fraction, Aromatic 150), and 24 wt % tetra-n-butylurea. The hydrogen feed rate was controlled to give a maximum reduction level (anthrahydroquinone or HQ titer) of 0.408 g mol/l. 2.254 g of a 2.6 wt % palladium on gamma alumina catalyst was added to the reactor. a temperature of 43°-45° C. and pressure of 15 psig

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 1.75-liter continuously stirred tank-type reactor with internal filters to retain the catalyst inside the reactor, operating at a volume of 1.25 liters, a temperature of 43°-45° C. and pressure of 15 psig, a working solution was circulated at a flow rate of 50 ml/min. The working solution initially contained 18 wt % ethylanthraquinone, of which 45 wt % was tetrahydroethylanthraquinone, 58 wt % of an aromatic solvent (alkylated benzenes - heavy naphtha fraction, Aromatic 150), and 24 wt % tetra-n-butylurea. The hydrogen feed rate was controlled to give a maximum reduction level (anthrahydroquinone or HQ titer) of 0.408 g mol/l. 2.254 g of a 2.6 wt % palladium on gamma alumina catalyst was added to the reactor. a temperature of 43°-45° C. and pressure of 15 psig

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 1.75-liter continuously stirred tank-type reactor with internal filters to retain the catalyst inside the reactor, operating at a volume of 1.25 liters, a temperature of 43°-45° C. and pressure of 15 psig, a working solution was circulated at a flow rate of 50 ml/min. The working solution initially contained 18 wt % ethylanthraquinone, of which 45 wt % was tetrahydroethylanthraquinone, 58 wt % of an aromatic solvent (alkylated benzenes - heavy naphtha fraction, Aromatic 150), and 24 wt % tetra-n-butylurea. The hydrogen feed rate was controlled to give a maximum reduction level (anthrahydroquinone or HQ titer) of 0.408 g mol/l. 2.254 g of a 2.6 wt % palladium on gamma alumina catalyst was added to the reactor. a temperature of 43°-45° C. and pressure of 15 psig