US 5,683,619 A · De-icing composition and method for making same

Abstract

A method of making a vegetation-friendly ice melting composition with sub-zero ice melting characteristics is described. The method of making the composition includes mixing from about 60-90 parts by weight non-fully hydrated ice melter, which is preferably calcium chloride with from about 10-40 parts by weight of fertilizer, which is preferably urea. The most preferred composition is about 70 parts by weight of calcium chloride and about 30 parts by weight urea. The calcium chloride and urea are preferably admixed first to coat the calcium chloride. To this mixture is added a measured amount of powdered non-fully hydrated calcium chloride as a solid coatant. The non-fully hydrated calcium chloride by hydration forms a coating around the ice melt base. The resultant mixture is discharged from the mixer, screened and packaged.

Claims13

Dependent claims

A process of preparing a uniform free flowing vegetation-friendly ice melting composition, said process comprising:

admixing an ice melter selected from the group consisting of
non-fully hydrated calcium chloride and non-fully hydrated magnesium chloride with a fertilizer selected from the group consisting of potassium chloride and urea;
uniformly coating for a time sufficient such that the ice melter and fertilizer are tacky and wetted but such that the fertilizer does not soak into the ice melter;
applying as a solid coating non-fully hydrated calcium chloride particles, wherein the calcium chloride particles have a size of from 80 mesh to 200 mesh;
and thereafter
quick mixing for from one minute to five minutes to provide a second coating surrounding the added dry materials mix;
and thereafter
screening and packaging the ice melt composition.

5 more elements

Dependencies are inferred from the claim text.

De-icing composition and method for making same

Life of this patent

De-icing composition and method for making same

Life of this patent

Abstract

Claims13