Title:
METHOD FOR THE MANUFACTURE OF A UREA-BASED COMPOSITION COMPRISING THE ADDITION OF AN ADDITIVE IN AN AQUEOUS FORM
Document Type and Number:
WIPO Patent Application WO/2022/136360
Kind Code:
A3
Abstract:
A method is disclosed for the manufacture of a homogeneous, solid, particulate, urea- based composition comprising urea and one or more additives in a urea production plant comprising at least an evaporator section and a particulation section, further comprises one or more of a mixing section, an effluent gas treatment section and a scrubber solution storage section, wherein the method comprises at least the steps of: (i) in the evaporator section, concentrating a urea melt of about 80 weight% to about 95 to 99 weight% of urea; (ii) in the particulation section, particulating a urea or urea-based melt into a urea or urea- based composition; and further comprises one or more of the steps of: (iii) in the mixing section, if present, mixing the urea melt of about 95 to 99 weight% with other fertilizer components to produce a urea-based melt; (iv) in the effluent gas treatment section, if present, treating the effluent gas from the particu¬ lation section comprising urea-based dust particles and ammonia gas with water to produce a scrubber solution; and (v) in the scrubber solution storage section, if present, storing the scrubber solution from the effluent gas treatment section; wherein the additive is introduced into the urea or urea-based composition as an aqueous suspension, an aqueous dispersion, or an aqueous liquid, by adding the additive to one or more of: (a) said effluent gas treatment section, if present; (b) said scrubber solution storage section containing the scrubber solution, if present. (c) said urea melt of about 80 weight% upstream of the evaporation section. (d) said urea-based melt in the mixing section, if present;
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Inventors:
VAN BELZEN RUUD (NL)
COLPAERT FILIP (BE)
LEDOUX FRANCOIS (FR)
COLPAERT FILIP (BE)
LEDOUX FRANCOIS (FR)
Application Number:
PCT/EP2021/086967
Publication Date:
August 11, 2022
Filing Date:
December 21, 2021
Export Citation:
Assignee:
YARA INT ASA (NO)
International Classes:
C05C9/00; C05G3/90
Foreign References:
| EP3626697A1 | 2020-03-25 | |||
| GB1113735A | 1968-05-15 | |||
| EP1761484A1 | 2007-03-14 | |||
| EP1670735A1 | 2006-06-21 | |||
| US20150052960A1 | 2015-02-26 |
Attorney, Agent or Firm:
DE CLERCQ & PARTNERS (BE)
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