Whitehurst Associates, Inc.

Encee Chemical Sales, Inc.

Other

Garnett B Whitehurst

Brooks M Whitehurst

Donald F Clemens

Taylor King

Solutions are prepared by dissolving N-(n-butyl)-thiophosphoric triamide (NBPT) in one or more N-substituted morpholines and mixtures thereof. The solutions may be used in urea fertilizers to reduce nitrogen volatilization, or to reduce the odor of animal waste or urine. Methods of preparing urea fertilizers and the resultant products are also described.

NBPT solutions for preparing urease inhibited urea fertilizers prepared from N-substituted morpholines

A method of producing reduced volatility of urea fertilizers comprising: dissolving N-(n-butyl)-thiophosphoric triamide (NBPT) in an amino alcohol having the formula 1&#x2014;(H)&#x2014;N&#x2014;((CH)&#x2014;OH)where m is 1-3, x is 0 or 1, and n is 2 when x is 1 and 3 when x is 0: or the formula 2&#x2014;(H)&#x2014;N&#x2014;((CH)&#x2014;CHOH&#x2014;CH)such that the length of the carbon chain where the secondary hydroxyl group is located is 3, y is 0 or 1, and z is 2 when y is 1 and 3 when y is 0 to form an NBPT solution; and combining a urea fertilizer in granular or liquid form with the NBPT solution.

Amino alcohol solutions of N-(n-butyl)thiophosphoric triamide (NBPT) and urea fertilizers using such solutions as urease inhibitors

Reduced volatility of urea fertilizers are prepared in accordance with the present invention by first preparing an N-(n-butyl)-thiophosphoric triamide (NBPT) solution by dissolving NBPT in a mixture of an amino alcohol having the formula 1&#x2014;(H)&#x2014;N&#x2014;((CH)&#x2014;OH)where m is 1-3, x is 0 or 1, and n is 2 when x is 1 and 3 when x is 0: or the formula 2&#x2014;(H)&#x2014;N&#x2014;((CH)&#x2014;CHOH&#x2014;CH)such that the length of the carbon chain where the secondary hydroxyl group is located is 3, y is 0 or 1, and z is 2 when y is 1 and 3 when y is 0, and a carboxylic acid having 6 or fewer carbon atoms. The solution is then combining with a urea fertilizer in granular or liquid form.

Buffered amino alcohol solutions of N-(n-butyl)thiophosphoric triamide (NBPT) and urea fertilizers using such solutions as urease inhibitors

Volatility-inhibited fertilizers are prepared by coating granular urea with a coating that includes a binding agent having a boron anion and a hydrogen bonding group to adhere the binding agent to the granular urea. The binding agent may be an amino alcohol borate in which the amino alcohol is selected from the group consisting of ethanolamine, diethanolamine, triethanolamine, and mixtures thereof, or a borate of an amino alcohol complex of a divalent metal. The borates are preferably prepared as an aqueous solution of the amino alcohol and boric acid, or the amino alcohol, a divalent metal salt, and boric acid, with the aqueous solution being applied to the urea granules. Additional plant nutrients may also be coated onto the urea granules.

Volatility-inhibited urea fertilizers

A method of coating urea by first wetting urea pellets with water or an aqueous acid solution, and then blended the wetted urea pellets with a phosphate salt. During the coating process, when using an aqueous acid solution, the acid liberates a portion of the phosphate to a form available to the plant, and reduces the loss of urea nitrogen due to volatilization.

Phosphate coated urea

This invention discloses processes and resulting products for the manufacture of metal heptonates from saccharides via a Kiliani-Fisher reaction and subsequent reaction with the desired metal. Manganese, iron, copper zinc and magnesium heptonates are each made by a slightly different process but the resulting metal chelates provide a soluble form of the metal for agricultural, industrial, environmental and construction uses. The amount of metal chelated is directly related to the percentage of fructose in the initial monosaccharide mixture. For cations with no color, the chelating agent can be decolorized with H.sub.2 O.sub.2 to give a lighter colored product providing the NH.sub.3 concentration is reduced below 0.35% prior to the decolorizing step. An equivalent strong oxidizing agent may be used instead of H.sub.2 O.sub.2.

Process for making compounds containing chelated metal ions and

This invention teaches the development of a chemical reagent useful as an aluminum brightening bath. The reagent's composition is primarily wet-process phosphoric acid to which has been added small quantities of nitric acid, copper, and optionally traces of several other substances. The reagent does not require expensive removal of the natural impurities found in wet-process phosphoric acid.

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New Bern, NC, United States of America

Garnett B Whitehurst