Yara International Asa

Uhde Fertilizer Technology B.v.

Thyssen Krupp Ag

Thyssenkrupp Fertilizer Technology Gmbh

Uhde Fertilzer Technology B.v.

Luc Albert Vanmarcke

Matthias Potthoff

Harald Franzrahe

Ruud Van Belzen

Erik Alexander Bijpost

Roeland Elderson

Francois Ledoux

Howard Volke

Thomas Krawczyk

John Van Der Hoeven

Peter De Bakker

Jaap Voorhans

Remco De Fouw

André Kayaert

Rune Ingels

Paul Niehues

Jacobus Gerardus Korver

Rob Stevens

Alexander Maslow

Rudy Nevejans

Jon Gunstein Klonteig

Thomas Johner

Mathias Potthoff

A spray nozzle for production of urea fertilizer granules and/or urea-sulfur fertilizer granules has a conveying channel and an atomizing gas channel. The conveying channel has at least one separating pin and the atomizing channel has at least one swirl element. The swirl element has inserts, cutouts and moving and fixed elements. The disclosure also sets out a fluidized bed granulator with a spray nozzle for production of a urea-sulfur fertilizer, a process for producing a urea-sulfur fertilizer, and the use of the spray nozzle for production of fertilizer granules.

Spray nozzle for producing a urea-sulfur fertilizer

A particulate, urea-containing composition and use of an additive for producing a particulate, urea-containing composition and methods of producing a particulate, urea-containing composition.

Urea-containing fertilizers and process for production thereof

Method and fluidized bed reactor for the production of granules, such as granules of urea or ammonium nitrate. The fluidized bed reactor comprises at least one granulation compartment with air inlets, and an air moving device downstream of the granulation compartment, e.g., downstream of at least one scrubbers. The air moving device is configured to draw air through said at least one air inlet into at least one granulation compartment.

Fluidized bed granulation

Method and fluidized bed reactor for the production of granules, such as granules of urea or ammonium nitrate. The reactor comprises at least one granulation compartment with air inlets, and an air moving device downstream the granulation compartment, e.g., downstream one or more scrubbers. The air moving device is configured to draw air through said one or more air inlets into the granulation compartment.

Disclosed is a particulate, urea-containing composition, to a method and apparatus for producing it, to the use thereof as fertilizer, as technical urea or as feed additive, and to the use of an additive for producing a particulate, urea-containing composition.

Urea composition and method for producing same

A urea granulation process with a scrubbing system may involve at least one gaseous waste stream for removal of dust and ammonia whereby the waste stream may be processed through a combination of process steps. In some examples, the process steps may involve washing the dust and ammonia laden stream with water and/or an aqueous urea solution whereby a dust-laden liquid stream and a dust-reduced stream is generated. The process steps may further involve reacting the dust-reduced stream with formaldehyde to form a stream comprising hexamethylenetetramine and urea-formaldehyde and clean off-gas. In some cases, the gas stream may be directed first through the washing step and then through the reacting step.

Urea granulation process with scrubbing system

A method for processing of granules, by forming at least one injection zone in a fluidized bed where a feed stream of seed particles is contacted or coated by a liquid product by simultaneous injection of the feed stream of the seed particles and a feed stream of the liquid product, forming at least one granulation zone in the fluidized bed where the contacted or coated seed particles may be at least one of dried, shaped, and cooled to form granules, extracting the granules from the at least one granulation zone and sorting the extracted granules into undersize granules, on-size granules, and oversize granules, passing the on-size granules to post-processing treatment, removing the oversize granules, and passing the undersize granules back into the feed stream of the seed particles, wherein the extracted granules are made to pass through at least one classifier located in the at least one granulation zone.

Method and device for processing of granules

Disclosed is a method for producing granular urea and reducing ammonia emissions in a gaseous waste stream of the urea granulation process. The method includes the steps of granulating urea and generating a gaseous waste stream from the granulation of the urea, first washing the waste stream in a first scrubber dust stage to remove dust form the gaseous waste stream, and then reacting the gaseous waste stream with formaldehyde in a formaldehyde stage to generate a hexamethylenetetramine and urea-formaldehyde liquid stream, and an ammonia-reduced off-gas stream.

The invention relates to a method for reducing aerosol emissions from a urea granulation plant with a recovery of the resulting scrubber bleeds, with

Method for reducing the visible downwind detached plume opacity

A method for producing urea granules having low moisture absorption capacity, with a urea granulator, having a granule flow inlet side and oppositely a granule flow outlet side, forming an axis alongside which granules from a urea solution and a urea/ammonium salt-stream are formed, whereby the solution and the salt-stream are sprayed as a mixture or separately via a feed system unit via various nozzles into the granulator onto a seed material. In this process the highest amount of the salt-stream is sprayed into the granulator at the granule flow inlet side and the amount of the salt-stream is decreased alongside the axis of the granulator from the granule flow inlet side to the granule flow outlet side.

Method for producing urea fertilizer with low moisture absorption tendencies

A method of improving the properties of urea granulates, more especially the caking tendency, the dust formation and the foaming tendency in aqueous media, by the addition of an additive to the urea, wherein the additive comprises a carboxylic acid compound with the general formula XY&#x2014;(Z)&#x2014;COOH, in which Z is a saturated or unsaturated hydrocarbon with 1-25 carbon atoms and X and Y are selected from the group consisting of a hydrogen atom or a polar organic functional group, and in that the additive is added as a solution in a polar solvent to the urea granulates, which are subsequently dried.

Method of improving the properties of urea granules

A method of improving the crushing strength, impact resistance and the compressibility of urea granules by the addition of a compound to the molten urea, wherein the compound comprises both a polyvinyl compound and an organic molecule consisting of 1-10 carbon atoms and 1-10 polar organic groups.

Method of improving the crushing strength, impact resistance and compressibility of urea, and urea composition

Colorfast urea composition having reduced compressibility, cake formation and tendency of re-crystallization of the urea granulate, wherein the granulate further contains at least two different biodegradable polymers, of which at least one polymer is preferably a polyalkenyl amine compound. The other polymer is preferably polyaspartic acid or polyvinyl alcohol. The invention further relates to a process for the preparation of such a urea composition.

Urea composition having reduced compressibility, cake formation and dust formation, and process for its preparation

The invention relates to a method of improving the crushing strength and reducing the dust formation and the caking tendency of urea particles by the addition of an organic compound to the molten urea, where at least one carbohydrate and optionally a polyvinyl compound is added to the urea. The invention also relates to a composition to be used as a urea additive.

Growing community of inventors

Lembecke, Belgium

Luc Albert Vanmarcke