Mississippi Chemical Corporation

Elmer Ladelle Blanton

Gerald L Tucker

A particulate fertilizer comprising urea particles having a fertilizing quantity of available zinc in the form of zinc oxide which is homogeneously dispersed throughout the urea particles. The urea-zinc oxide particles may be prepared by dissolving zinc oxide into molten urea containing less than 12% by weight water, based on water/urea + water, and solidifying the molten urea-zinc oxide blend into particles of any desired form.

Urea-zinc oxide composition and process

Urea particles uniformly coated with zinc oxide having excellent adherence and uniformity of the zinc oxide coating are obtained by using a zinc oxide composition characterized by having a purity of 90 to 99% zinc oxide and a uniform particle size of at least 90% smaller than 12 microns and at least 95% smaller than 37 microns. Outstanding coatings are obtained if the zinc oxide composition additionally contains traces of carbon, iron oxide, magnesium oxide, or calcium oxide. High zinc-content coatings of excellent uniformity and adherence may be obtained with these coating compositions.

Zinc oxide coated urea

Potassium cyanate is prepared by reacting from 1.75 to 2.15 moles of urea per mole of potassium hydroxide.

Growing community of inventors

Yazoo City, MS, United States of America

Elmer Ladelle Blanton