Abstract: Provided is a method for preparing a polyethylene polymerization catalyst including a first mixed solution preparation step of mixing a magnesium compound, a first hydrocarbon compound, and alcohol to prepare a first mixed solution; a viscosity adjustment step of adding a second hydrocarbon compound to the first mixed solution to adjust a viscosity of the first mixed solution; a second mixed solution preparation step of adding a first internal electron donor to the first mixed solution having an adjusted viscosity to prepare a second mixed solution; and a recrystallization step of adding a transition metal compound to the second mixed solution to perform recrystallization.

Abstract: Provided is a polyethylene manufacturing which is a manufacturing process of supplying a first mixed solution including a monomer, a solvent, and a scavenger and a second mixed solution including a Ziegler-Natta unsupported catalyst and a solvent to a continuous reactor to perform polymerization at a high temperature of 200° C. or more, and may solve a problem of an increase in an added catalyst amount during operation for a long time while having excellent catalytic activity is provided.

Abstract: The present disclosure relates to a method of producing polyethylene. More particularly, the present disclosure relates to a method of producing polyethylene capable of reducing wax produced after polymerization by washing a catalyst used in polymerization of ethylene under optimal conditions.