公开(公告)号：US10017428B2

公开(公告)日：2018-07-10

申请号：US15325793

申请日：2015-07-14

Applicant: YARA INTERNATIONAL ASA

Inventor： Terje Tande ,  Francois Ledoux

IPC: C05G3/00 ,  C01C1/18 ,  C05C1/02

CPC classification number: C05G3/0047 ,  C01C1/18 ,  C01C1/185 ,  C05C1/02 ,  C05G3/0029 ,  C05G3/0041

Abstract: The present invention relates to a solid, particulate, non-explosive composition comprising ammonium nitrate-based particles, in particular a fertilizer composition, of which, on the one hand, the potential misuse as a precursor for an explosive composition is limited without, on the other hand, hampering its legitimate use by farmers for food production. The solid, particulate, non-explosive composition further comprises a gelling agent which is able to form a substantially water-insoluble and non-filterable hydrogel after the solid fertilizer composition is contacted with water. The gelling agent is selected from the group of gum-based gelling agents, in particular xanthan gum-based agents and guar gum-based agents, most preferably is a xanthan gum-based agent.

公开(公告)号：US11034626B2

公开(公告)日：2021-06-15

申请号：US16462643

申请日：2017-11-30

Applicant: YARA INTERNATIONAL ASA

Inventor： Petrus Cornelis Maria Mutsaers ,  Terje Tande

IPC: C05G5/30 ,  A01C21/00 ,  C05B7/00 ,  C05G3/20 ,  C05C1/00 ,  C05C3/00 ,  C05B19/00

Abstract: The present disclosure provides robust fertilizer particles suitable for fertigation. A composition comprising mineral oil, primary alkylamines and water-insoluble particles may coat fertilizer particles and make them suitable for fertigation. Furthermore, the coated particles display reduced dusting tendency. The coating composition may be applied as a thin, single, continuous layer covering the particle core. The coating may avoid surface film problems when the particles are dissolved in water, even if the very hydrophobic mineral oil is less dense than water. It may be counterintuitive to include water-insoluble particles in a fertilizer particle for fertigation, however the claimed particles may be dissolved to make a fertigation solution that avoid problems in tanks, nozzles and piping of the fertigation systems.

公开(公告)号：US10294170B2

公开(公告)日：2019-05-21

申请号：US15518557

申请日：2015-11-25

Applicant: YARA INTERNATIONAL ASA

Inventor： Torstein Obrestad ,  Terje Tande

IPC: C09D191/06 ,  C05G3/00 ,  B01J2/30 ,  C05C1/00 ,  C05C11/00 ,  C05C9/00 ,  C05C3/00 ,  C05C5/00 ,  C05C5/04

Abstract: The invention relates to a conditioning agent for reducing water absorption and dust formation of a particulate fertilizer, comprising 10 to 50 weight % of wax, 40 to 90 weight % of mineral oil and 1 to 15 weight % of a resin being mineral oil-soluble and miscible with wax and mineral oil, wherein the agent further comprises 0.1 to 1 weight % of a viscoelastic elastomer selected from the group of polyisobutylene and styrene-isoprene-styrene block copolymer which is soluble in mineral oil and has an average molecular weight of 30.000 to 5.000.000. The invention further relates to a particulate fertilizer composition, preferably a urea-ammonium sulfate (UAS) fertilizer, a urea fertilizer or a calcium nitrate fertilizer, comprising a particulate substrate, preferably an hygroscopic fertilizer, preferably a nitrogen-containing fertilizer, and 0.05 to 2 weight % of said coating thereon for reducing moisture uptake and dust formation of said fertilizer.