Internorth, Inc.

James R Hatfield

James Richard Graham

Merlin H Moseman

Edward J Burns

Thomas J Hirt

A dust suppressant composition is described which is comprised of at least about 0.001 percent of polyethylene oxide with a molecular weight of at least about 6500, with the balance being water. Also described is a method for suppressing the formation of dust particles by applying the aforementioned composition to a dust-producing material such that at least about 0.01 grams of polyethylene oxide is applied per 100 square inches of flat surface area of dust-producing material.

Dust suppressant

An improved method for reducing the halogen content of a particulate polyolefin formed by catalytic polymerization of an olefin in the presence of a Ziegler-Natta catalyst is taught which comprises the steps of causing the polyolefin in the dry state to flow into a gas phase fluidized bed, contacting the polyolefin in the fluidized bed with a gas comprising 0.05% to 0.2% alkylene oxide, 5% to 30% water, and the balance inert gas such that the alkylene oxide reacts with halogens present in the polyolefin to form an alkylene halohydrin, removing the alkylene halohydrin from the fluidized bed and thus reducing the halogen content of the polyolefin. The improvement comprises regenerating the alkylene oxide by contacting the inert gas containing alkylene halohydrin with a caustic solution in alcohol or water and recovering therefrom alkylene oxide formed by the reaction of the alkylene halohydrin and the caustic solution.

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Omaha, NE, United States of America

James R Hatfield