公开(公告)号：US11767240B2

公开(公告)日：2023-09-26

申请号：US17274157

申请日：2019-09-17

Applicant: YARA INTERNATIONAL ASA

Inventor： Petr Chladek ,  Clive M. H. Brereton ,  Eric Robin Mielke

IPC: C02F1/44 ,  C02F1/467 ,  C02F101/12 ,  C02F103/34

CPC classification number: C02F1/445 ,  C02F1/4674 ,  C02F1/4678 ,  C02F2101/12 ,  C02F2103/34 ,  C02F2201/461 ,  C02F2301/08

Abstract: The present application relates to a method for removing a contaminant from wastewater from industrial fertilizer plant. The method comprises the steps of concentrating the wastewater, of electrolyzing the wastewater and of recirculating the electrolyzed wastewater to the fertilizer plant. The present application further relates to a system arranged to perform the method according to the present application.

公开(公告)号：US12103896B2

公开(公告)日：2024-10-01

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

CPC classification number: 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：US11485689B2

公开(公告)日：2022-11-01

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 ,  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.