초록 ▼

In a pressure swing adsorption system used to recover an oil-soluble solvent, monomer or hydrocarbon vapor such as 1,1,1-trichloroethane or styrene from a gaseous stream such as air, an oil-sealed vacuum pump may be used without substantial absorption of vapor into the oil if the oil in the pump is

In a pressure swing adsorption system used to recover an oil-soluble solvent, monomer or hydrocarbon vapor such as 1,1,1-trichloroethane or styrene from a gaseous stream such as air, an oil-sealed vacuum pump may be used without substantial absorption of vapor into the oil if the oil in the pump is heated to a temperature substantially above the dew point of vapor in the gas stream leaving the pump.

대표청구항 ▼

A process for recovering oil-soluble solvent, monomer or hydrocarbon vapor from a gaseous feedstream comprising the steps of (1) passing said gaseous feedstream containing oil-soluble vapor through a first adsorption bed containing a material that is effective to adsorb said oil-soluble vapor under

A process for recovering oil-soluble solvent, monomer or hydrocarbon vapor from a gaseous feedstream comprising the steps of (1) passing said gaseous feedstream containing oil-soluble vapor through a first adsorption bed containing a material that is effective to adsorb said oil-soluble vapor under conditions at which substantial oil-soluble vapor is adsorbed; (2) redirecting the flow of said gaseous feedstream to a second adsorption bed; (3) placing said first adsorption bed under reduced pressure generated by an oil-sealed vacuum pump in the presence of a backpurge gas stream running counter to the direction in which said gaseous feedstream flowed, under conditions such that oil-soluble vapor adsorbed upon said bed is desorbed and flows out of said bed with said backpurge stream; (4) drawing said desorbed oil-soluble vapor and backpurge gas stream through said oil-sealed vacuum pump while maintaining the oil in said pump at a temperature such that adsorption of vapor into the oil is restricted; and (5) passing desorbed oil-soluble vapor and backpurge gas from said vacuum pump to a vapor receiving step wherein said desorbed vapor is used, recovered or disposed of.