Patent · US Active

Method for producing urea fertilizer with low moisture absorption tendencies

US8945271B2 · kind B2 · utility

0Cited by

12References

20Claims

0Family size

Assignee

UHDE FERTILIZER TECHNOLOGY B.V. · NL

Inventors

Paul Niehues · Dortmund, DE
Harald Franzrahe · Dortmund, DE
Matthias Potthoff · Dortmund, DE
Luc Vanmarcke · Eeklo, BE

Key dates

Filing date	Aug 31, 2011
Grant date	Feb 3, 2015
Priority date	—
Expiry date	Aug 31, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC05C9/005
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.