公开(公告)号：US20220324763A1

公开(公告)日：2022-10-13

申请号：US17850137

申请日：2022-06-27

Applicant: YARA INTERNATIONAL ASA

Inventor： Amund MYRSTAD ,  Petr CHLADEK ,  Torstein OBRESTAD

IPC: C05C5/02 ,  C05C5/04 ,  C05G5/30

Abstract: The present disclosure concerns fertilizer particles comprising calcium nitrate and potassium nitrate. It is found that fertilizer particles comprising 43 to 47% w/w calcium nitrate and 46 to 54% w/w potassium nitrate can be produced by melt granulation. Due to undercooling problems, such particles were not expected to be suitable for industrial production by melt granulation. However, the present disclosure provides a composition which forms a low viscosity melt with short solidification time. This was successfully achieved by reducing the water content of a fertilizer melt comprising 43 to 47% w/w calcium nitrate and 46 to 54% w/w potassium nitrate to less than 3% w/w of the melt.

公开(公告)号：US20190389783A1

公开(公告)日：2019-12-26

申请号：US16476942

申请日：2018-01-15

Applicant: YARA INTERNATIONAL ASA

Inventor： Amund MYRSTAD ,  Petr CHLADEK ,  Torstein OBRESTAD

IPC: C05C5/02 ,  C05C5/04 ,  C05G3/00

Abstract: The present disclosure concerns fertilizer particles comprising calcium nitrate and potassium nitrate. It is found that fertilizer particles comprising 43 to 47% w/w calcium nitrate and 46 to 54% w/w potassium nitrate can be produced by melt granulation. Due to undercooling problems, such particles were not expected to be suitable for industrial production by melt granulation. However, the present disclosure provides a composition which forms a low viscosity melt with short solidification time. This was successfully achieved by reducing the water content of a fertilizer melt comprising 43 to 47% w/w calcium nitrate and 46 to 54% w/w potassium nitrate to less than 3% w/w of the melt.

公开(公告)号：US20170283339A1

公开(公告)日：2017-10-05

申请号：US15518557

申请日：2015-11-25

Applicant: YARA INTERNATIONAL ASA

Inventor： Torstein OBRESTAD ,  Terje TANDE

IPC: C05G3/00 ,  B01J2/30 ,  C05C5/00 ,  C05C5/04 ,  C05C3/00 ,  C05C9/00

CPC classification number: C05G3/0088 ,  B01J2/30 ,  C05C3/005 ,  C05C5/005 ,  C05C5/04 ,  C05C9/005 ,  C05G3/0029 ,  C05G3/0035 ,  C05G3/0041

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.

公开(公告)号：US20150344762A1

公开(公告)日：2015-12-03

申请号：US14427518

申请日：2013-09-17

Applicant: YARA INTERNATIONAL ASA

Inventor： Torstein OBRESTAD ,  Amund MYRSTAD ,  Tore FROGNER

IPC: C09K5/12

CPC classification number: C09K5/12

Abstract: The present invention relates to the use of a double salt of Ca(NO3)2 and KNO3 for the manufacture of a melt, in particular a nitrate-based heat transfer fluid (HTF) and/or thermal energy storage fluid, for example in solar energy applications, such as in solar electrical power plant systems using a parabolic through, a central receiver or a linear Fresnel, which have both a low melting temperature and a high decomposition temperature, as well as to methods for the manufacture thereof. Using said double salt, a melt could be manufactured comprising at least NaNO3, KNO3 and Ca(NO3)2, preferably, an eutectic ternary melt comprising Ca(NO3)2, NaNO3 and KNO3 in a weight ratio of about 42:15:43 with an operating temperature of about 131° C. to about 560° C.

Abstract translation: 本发明涉及使用Ca（NO 3）2和KNO 3的双重盐来制造熔体，特别是硝酸盐基传热流体（HTF）和/或热能储存流体，例如在太阳能 能量应用，例如具有低熔点温度和高分解温度的具有抛物线通过的中央接收器或线性菲涅尔的太阳能发电厂系统以及其制造方法。 使用所述双重盐，可以制造至少含有NaNO 3，KNO 3和Ca（NO 3）2的熔体，优选包含重量比为约42:15:43的Ca（NO 3）2，NaNO 3和KNO 3的共晶三元熔体 工作温度约131℃至约560℃