# US 2017/0283334 A1 · Micronutrient fertilizer

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- Number: US 2017/0283334 A1
- Document ID: US20170283334A1
- Status: Published application
- Kind: A1
- Application number: 15/509,672
- Filed: 2015-09-10
- Published: 2017-10-05
- Earliest claimed: 2014-09-12
- Assignees: Sun Chemical Corporation
- Applicants: Sun Chemical Corporation
- Inventors: Anthony Rohrer; Jonathan Doll; Lisa Clapp
- Web page: https://patentgrep.com/patent/US20170283334A1

## CPC

- C05D 9/02: containing trace elements
- C05D 5/00: Fertilisers containing magnesium (C05D7/00 takes precedence)
- C05F 11/00: Other organic fertilisers
- C05G 5/23: Solutions
- C05G 5/27: Dispersions, e.g. suspensions or emulsions
- C05D: INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05F: ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05G: MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS (organic fertilisers containing added bacterial cultures, mycelia, or the like C05F11/08; organic fertilisers containing plant vitamins or hormones C05F11/10); FERTILISERS CHARACTERISED BY THEIR FORM

## Abstract

The present technology relates to a micronutrient fertilizer comprising immediate release and sustained release components contained within a hydrated polyelectrolyte solution. The fertilizer is readily dispersed and stable over long periods of time.

## Claims

### Claim 1

A liquid micronutrient fertilizer composition comprising an aqueous dispersion of soluble and insoluble micronutrients, wherein the micronutrients may be immediate release, sustained release, or a mixture thereof, a polyelectrolyte, and a metal complexing agent.

### Claim 2 (depends on 1)

The composition of claim 1 wherein the soluble micronutrient may be any form of micronutrient that is soluble in water or aqueous systems and present at a concentration of about 0.5-25% by weight.

### Claim 3 (depends on 1)

The composition of claim 1 wherein the insoluble micronutrient may be any form of micronutrient that is not soluble in water or aqueous systems and is present at a concentration range of about 1%-80% by weight.

### Claim 4 (depends on 1)

The composition of claim 1 wherein the soluble micronutrient comprises boric acid, borax, boron trichloride, boron trifloride, boron tribromide, boron triiodide, boron trioxide, sodium borohydride, disodium octaborate tetrahydrate, orthoboric acid, potassium tetraborate, calcium borate, magnesium chloride, magnesium fluoride, magnesium bromide, magnesium iodide, magnesium nitrate, magnesium sulfate, magnesium sulfite, magnesium acetate, magnesium citrate, magnesium chromate, magnesium bicarbonate, magnesium perchlorate, aluminum nitrate, aluminum chloride, aluminum fluoride, aluminum bromide, aluminum iodide, aluminum sulfate, aluminum hydroxide, aluminum molybdate, potassium aluminum sulfate, sodium silicate, silicic acid, sulfuric acid, sodium sulfide, calcium carbonate, calcium chloride, calcium sulfate, calcium nitrate, lime, calcium ammonium citrate, calcium citrate, chromium (III) chloride, chromium (III) bromide, chromium (III) iodide, chromium (III) nitrate, hydrated chromium (III) sulfate, chromic acid, potassium chromate, potassium dichromate, manganese nitrate, manganese chloride, manganese bromide, manganese iodide, manganese sulfate, manganese oxysulfate, manganese acetate, manganese citrate, permanganic acid, potassium permanganate, sodium manganate, silver nitrate, silver fluoride, iron (II) chloride, iron (II) bromide, iron (II) sulphate, iron (II) acetate, iron (II) citrate, iron (II) gluconate, iron (II) lactate, iron (III) nitrate, iron (III) chloride, iron (III) oxychloride, potassium ferrite, potassium ferricyanide, potassium ferrioxalate, potassium chloride, potassium iodide, potassium bromide, potassium nitrate, potassium bicarbonate, potassium chromate, potassium dichromate, potassium phosphate, potassium hydroxide, potassium sulfate, and mixtures thereof.

### Claim 5 (depends on 1)

The composition of claim 1 wherein the insoluble micronutrient comprises elemental boron, boron nitride, boron carbide, elemental magnesium, magnesium carbonate, dolomite, hydrated dolomite, magnesium hydroxide, magnesium oxide, magnesium oxalate, struvite, elemental aluminum, aluminum dodecaboride, aluminum oxide, aluminum hydroxide, bauxite, elemental silicon, silicon dioxide, elemental sulfur, calcium sulfate, gypsum, calcium carbonate, calcium phosphate, calcitic limestone, eggshells, bonemeal, calcium apatite, elemental chromium, chromium phosphate, chromium (III) oxide, elemental manganese, rhodochrosite, manganese (II) oxide, elemental iron, iron (II) oxide, iron (III) oxide, iron hydroxide, iron sucrate, elemental cobalt, cobalt (II) oxide, cobalt (III) oxide, cobalt (II, III) oxide, cobalt (II) hydroxide, cobalt (III) hydroxide, Cobalt (II) sulfide, cobalt (II) selenide, cobalt (II) phosphide, cobalt (II) cyanide, elemental nickel, nickel (II) oxide, nickel (III) oxide, nickel oxyhydroxide, nickel (II) carbonate, nickel (II) chromate, nickel (II) hydroxide, millerite, nickel (II) selenide, nickel titanate, nickel phosphide, elemental copper, copper (I) cyanide, copper chromite, copper (I) oxide, chalcocite, copper (I) selenide, copper (I) phosphide, copper (II) oxide, copper (II) carbonate, copper (II) phosphate, covellite, copper (II) selenide, copper (II) arsenate, elemental silver, silver chloride, silver bromide, silver iodide, silver oxide, elemental zinc, zinc cyanide, zinc chromate, zinc molybdate, zinc oxide, zinc hydroxide, zinc nitride, zinc blende, wurtzite, zinc selenide, zinc telluride, zinc pyrophosphate, zinc phosphide, zinc phosphate, tin (II) oxide, tin (II) hydroxide, tin (II) sulfide, tin (II) selenide, tin (IV) oxide, tin (IV) sulfide, and mixtures and alloys thereof.

### Claim 6 (depends on 1)

The composition of claim 1 wherein the micronutrient fertilizer is applied at least once during a growing season.

### Claim 7 (depends on 1)

The composition of claim 1 wherein the polyelectrolyte is a polymer that has an ionic charge repeated along the polymer.

### Claim 8 (depends on 7)

The composition of claim 7 wherein the charge on the polymer is positive, negative or a mixture of positive and negative charges.

### Claim 9 (depends on 1)

The composition of claim 1 wherein the polyelectrolyte is soluble in water.

### Claim 10 (depends on 1)

The composition of claim 1 wherein the polyelectrolyte is soluble in a polar solvent.

### Claim 11 (depends on 1)

The composition of claim 1 wherein the polyelectrolyte is added to the aqueous micronutrient fertilizer dispersion at a concentration of about 0.1% - 10%, by weight, with respect to the total weight of the micronutrient fertilizer composition.

### Claim 12 (depends on 1)

The composition of claim 1 wherein the polyelectrolyte is a natural polymer.

### Claim 13 (depends on 1)

The composition of claim 1 wherein the polyelectrolyte is a synthetic polymer.

### Claim 14 (depends on 1)

The composition of claim 1 wherein the polyelectrolyte is a polyelectrolyte comprises at least one polymer selected from alginic acid, sodium alginate, humic acid, pectin, chitosan, gelatin, polylysine, polyarginine, polyhistidine, polyaspartate, polygluconate, DNA, RNA, polylactate, soluble lingo sulfonate, gelatin, humic acid, polyacrylic acid, polystyrene sulfonate, poly(allylamine hydrochloride), poly(ethylenimine hydrochloride), N-alkyl-polyethylenimine, nafion.

### Claim 15 (depends on 1)

The composition of claim 1, wherein the metal complexing agent is present in a concentration of about 1% - 20% by weight, with respect to total weight of the micronutrient fertilizer composition.

### Claim 16 (depends on 1)

The composition of claim 1, wherein the metal complexing agent is an organic or inorganic molecule that forms a complex with a metal.

### Claim 17 (depends on 1)

The composition of claim 1, wherein the metal complexing is selected from ammonia, citric acid, folic acid, ethylenediamine, ethylenediaminetetracetic acid, N-(hydroxyethyl)ethylenediaminetriacetic acid, diethylenetriamine pentacetic acid, ethylenediaminedi(o-hydroxyphenylacetic) acid, ethylenediaminedi(o-hydroxy-p-methylphenyl)acetic acid, ethylenediaminedi(5-carboxy-2-hydroxyphenyl)acetic acid, nitrilotriacetic acid, glucoheptonic acid, ascorbic acid, fumaric acid, gluconic acid, lactic acid, malic acid, nitrilotriacetic acid, pentetic acid, tartaric acid, glycine, alanine, proline, leucine, isoleucine, threonine, serine, tryptophan, tyrosine, valine, phenylalanine, methionine, lysine, arginine, histidine, glutamine, glutamic acid, aspartic acid, asparagine, cysteine, taurine, lanthionine, 2-aminoisobutyric acid, dehydroalanine, citruline, ornithine, pantothenic acid, oxalic acid, tetrathiooxalate salts, 12-crown-4, 15-crown-5, 18-crown-6, dibenzo-18-crown-6, and diaza-18-crown-6, [2.2.2] cryptand, ethylene glycol-bis(2-aminoethylether)-N,N,N′,N′-tetraacetic acid, and mixtures thereof.

### Claim 18 (depends on 1)

The composition of claim 1, wherein pH of the micronutrient fertilizer composition is from about 6.0 to about 10.0.