FERTILIZER MIXTURE CONTAINING NITRIFICATION INHIBITOR

• US 20170050894A1
• Filed: 12/12/2014
• Published: 02/23/2017
• Est. Priority Date: 12/13/2013
• Status: Active Grant

• Current Assignee: Eurochem Agro GmbH
• Original Assignee: Eurochem Agro GmbH
• Inventors: PETERS, Nils, HAEHNDEL, Reinhardt
• Granted Patent: US 10,640,431 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C05C 1/02 Granulation apparatus B01J2/00; Pelletisation; Stabilisation; Colouring
• CPC Class Codes: C05C 3/005 Post-treatment
• CPC Class Codes: C05G 3/90 for affecting the nitrification of ammonium compounds or urea in the soil
• CPC Class Codes: C07D 231/12 with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
• CPC Class Codes: C09K 15/20 containing nitrogen and oxygen
• CPC Class Codes: Y02P 60/21 Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Abstract

The invention relates to a fertilizer mixture comprising

• • A. calcium ammonium nitrate mineral fertilizer which, besides ammonium nitrate and calcium carbonate and/or magnesium carbonate and optionally water, may contain up to 15 wt %, based on the calcium ammonium nitrate mineral fertilizer without water, of further ingredients,
  • B. 100 to 10 000 ppm by weight, based on component A without water, of 2-(N-3,4-dimethylpyrazole)succinic acid.

Claims

1. A fertilizer mixture comprising

A. calcium ammonium nitrate mineral fertilizer which, besides ammonium nitrate and calcium carbonate and/or magnesium carbonate and optionally water, may contain up to 15 wt %, based on the calcium ammonium nitrate mineral fertilizer without water, of further ingredients,

B. 100 to 10 000 ppm by weight, based on component A without water, of 2-(N-3,4-dimethylpyrazole)succinic acid.

2. The fertilizer mixture as claimed in claim 1, characterized in that in component A, based on the calcium ammonium nitrate mineral fertilizer without water, the nitrogen content is at least 22 wt %, preferably 25 to 29 wt %, more preferably 26 to 28 wt %.

3. The fertilizer mixture as claimed in claim 1, characterized in that in component A, based on the calcium ammonium nitrate mineral fertilizer without water, the calcium and/or magnesium content is 6 to 15 wt %, preferably 7 to 13 wt %, more particularly 9 to 11 wt %.

4. The fertilizer mixture as claimed in claim 1, characterized in that component A contains 0.5 to 7 wt %, preferably 1 to 5 wt %, more preferably 3 to 5 wt %, based on the calcium ammonium nitrate mineral fertilizer without water, of MgO and/or Mg salt.

5. The fertilizer mixture as claimed in claim 1, characterized in that component A contains 0.01 to 1 wt %, preferably 0.1 to 0.5 wt %, more particularly 0.15 to 0.3 wt%, based on the calcium ammonium nitrate mineral fertilizer without water, of boron as element or in the form of boron compounds.

6. A process for producing a fertilizer mixture as claimed in claim 1 by introducing 2-(N-3,4-dimethylpyrazole)succinic acid into the calcium ammonium nitrate mineral fertilizer and/or applying 2-(N-3,4-dimethylpyrazole)succinic acid to the calcium ammonium nitrate mineral fertilizer.

7. A process for fertilizing soils exploited agriculturally or horticulturally, characterized in that a fertilizer mixture comprising

A. calcium ammonium nitrate mineral fertilizer which, besides ammonium nitrate and calcium carbonate and/or magnesium carbonate and optionally water, may contain up to 15 wt %, based on the calcium ammonium nitrate mineral fertilizer without water, of further ingredients,

B. 100 to 10 000 ppm by weight, based on component A without water, of 2-(N-3,4-dimethylpyrazole)succinic acid,

or components A and B separately, but within a period of 0 to 5 hours, is applied to the soils.

8. A process for preparing 2-(N-3,4-dimethylpyrazole)succinic acid by reaction of 3,4-dimethylpyrazole with maleic acid and/or maleic anhydride in the absence of organic solvents or diluents, and subsequent crystallization from the resulting reaction product in the absence of organic solvents or diluents.

9. The process as claimed in claim 8, characterized in that the reaction takes place in water as solvent and the crystallization takes place from the aqueous reaction product.

10. The process as claimed in claim 8, characterized in that aqueous solutions or pastes of 3,4-dimethylpyrazole and/or maleic acid and/or maleic anhydride are reacted.

11. The process as claimed in claim 8, characterized in that the crystallization takes place by cooling of the aqueous reaction product, optionally with accompanying use of seed crystals.

12. The process as claimed in claim 8, characterized in that the 2-(N-3,4-dimethylpyrazole)succinic acid obtained after the crystallization has a purity of at least 99.7%, preferably of at least 99.9%.

13. An aqueous solution of 2-(N-3,4-dimethylpyrazole)succinic acid having a pH of greater than 7.

14. The aqueous solution as claimed in claim 13, characterized in that the fraction of 2-(N-3,4-dimethylpyrazole)succinic acid, based on the aqueous solution, is 20 to 40 wt %, preferably 25 to 35 wt %, more preferably 27.5 to 32.5 wt %.

15. The aqueous solution as claimed in claim 13, characterized in that the aqueous solution contains 0.5 to 20 wt %, preferably 1 to 10 wt %, more particularly 1.5 to 7 wt %, based on the aqueous solution, of one or more phosphates or polyphosphates.