Abstract: The present invention relates to a process to control the molecular weight distribution of polyethylene and to reduce the smoke quantity during the formation of polyethylene, wherein the process for preparing polyethylene having narrow molecular weight distribution, comprising the following steps: a) continuously polymerizing ethylene by subjecting ethylene stream, hydrogen, solvent, Ziegler-Natta catalyst comprising titanium, co-catalyst, external electron donor selected from alkoxysilane compound into the reactor to produce polymer slurry; b) removing residue reaction gas from the polymer slurry stream obtained from a) and c) separating polymer stream in b) from the solvent.

Abstract: An aspect of the present invention is a preparation of a magnesium halide support for using as a composition of a catalyst in an olefin polymerization, wherein the magnesium halide support is a solid substance prepared by an aliphatic alcohol non-ionic surfactant, preferably is ethoxylated aliphatic alcohol. Another aspect of the present invention is a method for the preparation of the magnesium halide support for using as the composition of the catalyst in the olefin polymerization comprising the following steps: (a) adding a magnesium halide compound into an organic solvent, and heating; (b) cooling down the mixture from (a) rapidly to the room temperature or lower in the inert organic solvent and the aliphatic alcohol non-ionic surfactant; and (c) washing the magnesium halide with the anhydrous inert organic solvent, and drying, wherein the aliphatic alcohol non-ionic surfactant is ethoxylated aliphatic alcohol.

Abstract: An aspect of the present invention is a preparation of a magnesium halide support for using as a composition of a catalyst in an olefin polymerization, wherein the magnesium halide support is a solid substance prepared by an aliphatic alcohol non-ionic surfactant, preferably is ethoxylated aliphatic alcohol. Another aspect of the present invention is a method for the preparation of the magnesium halide support for using as the composition of the catalyst in the olefin polymerization comprising the following steps: (a) adding a magnesium halide compound into an organic solvent, and heating; (b) cooling down the mixture from (a) rapidly to the room temperature or lower in the inert organic solvent and the aliphatic alcohol non-ionic surfactant; and (c) washing the magnesium halide with the anhydrous inert organic solvent, and drying, wherein the aliphatic alcohol non-ionic surfactant is ethoxylated aliphatic alcohol.