Fertilizer-polymer mixtures which inhibit nitrification in soils
AssigneeSpecialty Fertilizer Products, LLC
InventorsJohn Larry Sanders, Grigory Mazo, Jacob Mazo
Life of this patent
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Abstract
Improved, low-pH aqueous polymer mixtures are provided which can be applied directly to soils or incorporated within ammoniacal nitrogen-containing fertilizers to inhibit nitrification in soils, thus enhancing plant uptake of ammonium and yields. The polymers are advantageously used as metal (e.g., Ca) salts or complexes at pH levels of up to about 2. The polymers have anionic functional groups and are highly water dispersible.
Claims30
An aqueous liquid fertilizer material comprising an ammoniacal nitrogen-containing fertilizer and an aqueous polymer mixture having a pH prior to incorporation with said fertilizer of up to about 2, said polymer mixture including a polymer comprising recurring polymeric subunits each made up of at least two different moieties individually and respectively taken from the group consisting of A, B, and C moieties, or recurring C moieties, and C moieties which are not different, wherein moiety A is of the general formula
- moiety B is of the general formula
- and moiety C is of the general formula
- wherein R1, R2 and R7 are individually and respectively selected from the group consisting of H, OH, C1-C30 straight, branched chain and cyclic alkyl or aryl groups, C1-C30 straight, branched chain and cyclic alkyl or aryl C1-C30 based ester groups (formate (C0), acetate (C1), propionate (C2), butyrate (C3), etc. up to C30), R′CO2 groups, and OR′ groups, wherein R′ is selected from the group consisting of C1-C4 straight, branched chain and cyclic alkyl or aryl groups;
- R3 and R4 are individually and respectively selected from the group consisting of H, C1-C30 straight, branched chain and cyclic alkyl or aryl groups;
- R5, R6, R10 and R11 are individually and respectively selected from the group consisting of H, the alkali metals, NH4 and the C1-C4 alkyl ammonium groups, Y is selected from the group consisting of Fe, Mn, Mg, Zn, Cu, Ni, Co, Mo, V, Cr, Si, B, and Ca;
- R8 and R9 are individually and respectively selected from the group consisting of nothing, CH2, C2H4, and C3H6.
An aqueous polymer mixture having a pH of up to about 2, said polymer mixture including a polymer comprising recurring polymeric subunits each made up of at least two different moieties individually and respectively taken from the group consisting of A, B, and C moieties, or recurring C moieties, and C moieties which are not different, wherein moiety A is of the general formula
- moiety B is of the general formula
- and moiety C is of the general formula
- wherein R1, R2 and R7 are individually and respectively selected from the group consisting of H, OH, C1-C30 straight, branched chain and cyclic alkyl or aryl groups, C1-C30 straight, branched chain and cyclic alkyl or aryl C1-C30 based ester groups (formate (C0), acetate (C1), propionate (C2), butyrate (C3), etc. Lip to C30), R′CO2 groups, and OR′ groups, wherein R′ is selected from the group consisting of C1-C30 straight, branched chain and cyclic alkyl or aryl groups;
- R3 and R4 are individually and respectively selected from the group consisting of H, C1-C30 straight, branched chain and cyclic alkyl or aryl groups;
- R5, R6, R10 and R11 are individually and respectively selected from the group consisting of H, the alkali metals, NH4 and the C1-C4 alkyl ammonium groups, Y is selected from the group consisting of Fe, Mn, Mg, Zn, Cu, Ni, Co, Mo, V, Cr, Si, B, and Ca;
- R8 and R9 are individually and respectively selected from the group consisting of nothing, CH2, C2H4, and C3H6.
An aqueous liquid fertilizer material comprising a ammoniacal nitrogen-containing fertilizer and a polymer present in said mixture at a level of up to about 2% by volume based upon the total volume of the liquid fertilizer material taken as 100% by weight, said polymer comprising recurring polymeric subunits each made up of at least two different moieties individually and respectively taken from the group consisting of A, B, and C moieties, or recurring C moieties, and C moieties which are not different, wherein moiety A is of tile general formula
- moiety B is of the general formula
- and moiety C is of the general formula
- wherein R1, R2 and R7 are individually and respectively selected from the group consisting of H, OH, C1-C30 straight, branched chain and cyclic alkyl or aryl groups, C1-C30 straight, branched chain and cyclic alkyl or aryl C1-C30 based ester groups (formate (C0), acetate (C1), propionate (C2), butyrate (C3), etc. up to C30), R′CO2 groups, and OR′ groups, wherein R′ is selected from the group consisting of C1-C30 straight, branched chain and cyclic alkyl or aryl groups;
- R3 and R4 are individually and respectively selected from the group consisting of H, C1-C30 straight, branched chain and cyclic alkyl or aryl groups;
- R5, R6, R10 and R11 are individually and respectively selected from the group consisting of H, the alkali metals, NH4 and the C1-C4 alkyl ammonium groups, Y is selected from the group consisting of Fe, Mn, Mg, Zn, Cu, Ni, Co, Mo, V, Cr, Si, B, and Ca;
- R8 and R9 are individually and respectively selected from the group consisting of nothing, CH2, C2H4, and C3H6.
Dependencies are inferred from the claim text.