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1. (US6176892) Method for making nitrogen-potassium fertilizer containing calcium nitrate and products thereof

Office : United States of America
Application Number: 09051958 Application Date: 21.07.1998
Publication Number: 6176892 Publication Date: 23.01.2001
Grant Number: 6176892 Grant Date: 23.01.2001
Publication Kind : B1
Prior PCT appl.: Application Number:NO96000244 ; Publication Number: Click to see the data
IPC:
C05C 5/00
C05C 13/00
C05C 1/00
C05C 5/02
C05C 5/04
C05C 7/02
C CHEMISTRY; METALLURGY
05
FERTILISERS; MANUFACTURE THEREOF
C
NITROGENOUS FERTILISERS
5
Fertilisers containing other nitrates
C CHEMISTRY; METALLURGY
05
FERTILISERS; MANUFACTURE THEREOF
C
NITROGENOUS FERTILISERS
13
Mixtures of nitrogenous fertilisers covered by more than one of main groups C05C1/-C05C11/128
C CHEMISTRY; METALLURGY
05
FERTILISERS; MANUFACTURE THEREOF
C
NITROGENOUS FERTILISERS
1
Ammonium nitrate fertilisers
C CHEMISTRY; METALLURGY
05
FERTILISERS; MANUFACTURE THEREOF
C
NITROGENOUS FERTILISERS
5
Fertilisers containing other nitrates
02
containing sodium or potassium nitrate
C CHEMISTRY; METALLURGY
05
FERTILISERS; MANUFACTURE THEREOF
C
NITROGENOUS FERTILISERS
5
Fertilisers containing other nitrates
04
containing calcium nitrate
C CHEMISTRY; METALLURGY
05
FERTILISERS; MANUFACTURE THEREOF
C
NITROGENOUS FERTILISERS
7
Fertilisers containing calcium or other cyanamides
02
Granulation; Pelletisation; De-gassing; Hydrating; Hardening; Stabilisation; Oiling
Applicants: Norsk Hydro ASA
Inventors: Obrestad, Torstein
Isaksen, Jan Birger
Moland, Lars Gustav
Agents: Wenderoth, Lind & Ponack, L.L.P.
Priority Data: 954336 27.10.1995 NO
Title: (EN) Method for making nitrogen-potassium fertilizer containing calcium nitrate and products thereof
Abstract: front page image
(EN)

The invention relates to a method for making NK-fertilizers basically from calcium nitrate fertilizers and potassium nitrate and homogeneous NK-fertilizer products. Calcium nitrate fertilizer is melted together with potassium nitrate to form a melt or suspension thereof which is particulated to form a homogeneous NK-fertilizer. The calcium nitrate fertilizer and the potassium nitrate are melted at 90-120° C. and then heated to the desired particulation temperature being 160-190° C. for prilling and 90-140° C. for granulation. The components are mixed in ratios giving a melt or suspension comprising 40-14 weight % calcium nitrate, 55-85 weight % potassium nitrate, 0.5-6 weight % water, 0-4 weight % ammonium nitrate and 0-5 weight % magnesium nitrate.


Also published as:
CZPV1998-1238IL124244ES2155208EP0857167KE1996000075RU02146663
JP2000505409 CN1204309CA2235577DE000069611457PT857167NZ321691
AU1996075092WO/1997/015536