Process for producing olefins

A method of converting an olefin into another kind of olefin by a metathesis reaction while suppressing conversion of the olefin to paraffins, the method comprising:

• feeding a gas of the olefin through a catalyst bed in the presence of hydrogen gas at 0.05 to 10.0% by volume of the total volume of the gas at a superficial velocity of the gas of 0.01 to 2.0 m/sec, the catalyst bed comprising a catalyst and a co-catalyst, the catalyst comprising at least one metal selected from the group consisting of tungsten, molybdenum, rhenium, niobium, tantalum, and vanadium, and the co-catalyst comprising a basic compound having at least one metal selected from the group consisting of Group Ia (alkali metals), Group IIa (alkaline earth metals), Group IIb and Group IIIa of the periodic table.

A method of selectively producing olefins, comprising:

• converting an olefin into another kind of olefin by a metathesis reaction by feeding a gas of the olefin through a catalyst bed;
• and
• suppressing conversion of the olefin to paraffins, wherein the gas of the olefin is fed through the catalyst bed in the presence of hydrogen gas at 0.05 to 10.0% by volume of the total volume of the gas at a superficial velocity of the gas of 0.01 to 2.0 m/sec, the catalyst bed comprising a catalyst and a co-catalyst, the catalyst comprising at least one metal selected from the group consisting of tungsten, molybdenum, rhenium, niobium, tantalum, and vanadium, and the co-catalyst comprising a basic compound having at least one metal selected from the group consisting of Group Ia (alkali metals), Group IIa (alkaline earth metals), Group IIb and Group IIIa of the periodic table.