Abrégé

A method for producing phosphoryl triamide OP(NH2)3 or thiophosphoryl triamide SP(NH2)3, in which: a) phosphoryl trichloride OPCl3 or thiophosphoryl trichloride SPCl3, respectively, is reacted with gaseous ammonia in an apolar liquid phase to give a first precipitate comprising, respectively, phosphoryl triamide or thiophosphoryl triamide, and ammonium chloride, and b) the first precipitate is treated with sodium carbonate or potassium carbonate, in a polar organic liquid phase, to give a second precipitate comprising NaCl and the phosphoryl triamide or thiophosphoryl triamide remaining in said polar organic liquid phase, and the second precipitate is separated from the polar organic liquid phase, the latter possibly undergoing a further concentration step to enrich it in phosphoryl triamide or thiophosphoryl triamide.

Classes IPC  ?

• C05G 3/90 - Mélanges d'un ou plusieurs engrais avec des additifs n'ayant pas une activité spécifique d'engrais pour influer sur la nitrification des composés d’ammonium ou de l’urée dans le sol
• C01B 21/097 - Composés contenant de l'azote et des non-métaux contenant un ou plusieurs atomes de phosphore
• C05C 9/00 - Engrais contenant de l'urée ou ses composés

Abrégé

The invention relates to a method for preparing a fertilizer enriched with selenium and to a device for implementing this method. The method comprises the following steps: - providing or preparing a spraying composition by mixing a first liquid or viscous phase, called the "coating liquid phase", and a second liquid phase containing selenium atoms, the selenium atoms preferably having been added to this second liquid phase as sodium selenate, and the second liquid phase preferably being an aqueous phase; - circulating a solid nitrogen fertilizer on a conveyor belt at a predetermined mass flow rate; - spraying the spraying composition onto the circulating solid nitrogen fertilizer by means of spray nozzles at a predetermined volume flow rate.

Classes IPC  ?

• C05D 9/02 - Autres engrais inorganiques contenant des éléments à l'état de traces
• C05G 5/30 - Engrais caractérisés par leur forme en couches ou enrobés, p. ex. enrobages anti-poussière
• C05F 17/10 - Addition ou élimination de substances autres que l’eau ou l’air aux ou des matières pendant le traitement

Abrégé

Disclosed is a method for producing phosphoryl triamide OP(NH2)3 or thiophosphoryl triamide SP(NH2)3, wherein a) phosphoryl trichloride OPCI3 or thiophosphoryl trichloride SPCl3, respectively, is reacted with gaseous ammonia in an apolar liquid phase to give a first precipitate comprising, respectively, phosphoryl triamide or thiophosphoryl triamide, and ammonium chloride, b) said first precipitate is treated with sodium carbonate or potassium carbonate, preferably with sodium carbonate, in a polar organic liquid phase, to give a second precipitate comprising NaCI and the remaining phosphoryl triamide or thiophosphoryl triamide in said polar organic liquid phase, and said second precipitate is separated from said polar organic liquid phase, said phase optionally being further subjected to a concentration step to enrich it in phosphoryl triamide or thiophosphoryl triamide.

Classes IPC  ?

• C01B 21/097 - Composés contenant de l'azote et des non-métaux contenant un ou plusieurs atomes de phosphore
• C05G 3/90 - Mélanges d'un ou plusieurs engrais avec des additifs n'ayant pas une activité spécifique d'engrais pour influer sur la nitrification des composés d’ammonium ou de l’urée dans le sol
• C07F 9/06 - Composés du phosphore sans liaisons P—C

Abrégé

2333 or thiophosphoryl trichloride SPCl3, respectively, is reacted with gaseous ammonia in an apolar liquid phase to give a first precipitate comprising, respectively, phosphoryl triamide or thiophosphoryl triamide, and ammonium chloride, b) said first precipitate is treated with sodium carbonate or potassium carbonate, preferably with sodium carbonate, in a polar organic liquid phase, to give a second precipitate comprising NaCI and the remaining phosphoryl triamide or thiophosphoryl triamide in said polar organic liquid phase, and said second precipitate is separated from said polar organic liquid phase, said phase optionally being further subjected to a concentration step to enrich it in phosphoryl triamide or thiophosphoryl triamide.

Classes IPC  ?

• C07F 9/06 - Composés du phosphore sans liaisons P—C
• C01B 21/097 - Composés contenant de l'azote et des non-métaux contenant un ou plusieurs atomes de phosphore
• C05G 3/90 - Mélanges d'un ou plusieurs engrais avec des additifs n'ayant pas une activité spécifique d'engrais pour influer sur la nitrification des composés d’ammonium ou de l’urée dans le sol