WO2002020471A3 - Method of improving the crushing strength and the impact resistance of urea, and urea composition - Google Patents

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

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Publication number
WO2002020471A3
WO2002020471A3 PCT/NL2001/000663 NL0100663W WO0220471A3 WO 2002020471 A3 WO2002020471 A3 WO 2002020471A3 NL 0100663 W NL0100663 W NL 0100663W WO 0220471 A3 WO0220471 A3 WO 0220471A3
Authority
WO
WIPO (PCT)
Prior art keywords
urea
improving
impact resistance
crushing strength
radical
Prior art date
Application number
PCT/NL2001/000663
Other languages
French (fr)
Other versions
WO2002020471A2 (en
Inventor
Der Hoeven John Van
Johannes Joseph Noordover
Erik Alexander Bijpost
Arjen Wim Velzel
Original Assignee
Holland Novochem B V
Der Hoeven John Van
Johannes Joseph Noordover
Erik Alexander Bijpost
Arjen Wim Velzel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Holland Novochem B V, Der Hoeven John Van, Johannes Joseph Noordover, Erik Alexander Bijpost, Arjen Wim Velzel filed Critical Holland Novochem B V
Priority to EP01975023A priority Critical patent/EP1315688A2/en
Priority to AU2001294392A priority patent/AU2001294392A1/en
Publication of WO2002020471A2 publication Critical patent/WO2002020471A2/en
Publication of WO2002020471A3 publication Critical patent/WO2002020471A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
    • C07C273/14—Separation; Purification; Stabilisation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/005—Post-treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Fertilizers (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

The invention relates to a method of improving the crushing strength and impact resistance of urea granules by the addition of an additive comprising a polyvinyl compound of the general formula (CHX-CHY)n, where n = 4-10 000, and X and Y independently of one another are selected from the group consisting of a hydrogen atom, a hydroxyl radical, carboxylic acid radical, amine radical or amide radical. This method is characterized in that it starts with a urea melt.
PCT/NL2001/000663 2000-09-07 2001-09-07 Method of improving the crushing strength and the impact resistance of urea, and urea composition WO2002020471A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01975023A EP1315688A2 (en) 2000-09-07 2001-09-07 Method of improving the crushing strength and the impact resistance of urea, and urea composition
AU2001294392A AU2001294392A1 (en) 2000-09-07 2001-09-07 Method of improving the crushing strength and the impact resistance of urea, and urea composition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1016123 2000-09-07
NL1016123 2000-09-07

Publications (2)

Publication Number Publication Date
WO2002020471A2 WO2002020471A2 (en) 2002-03-14
WO2002020471A3 true WO2002020471A3 (en) 2002-08-08

Family

ID=19772036

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2001/000663 WO2002020471A2 (en) 2000-09-07 2001-09-07 Method of improving the crushing strength and the impact resistance of urea, and urea composition

Country Status (3)

Country Link
EP (1) EP1315688A2 (en)
AU (1) AU2001294392A1 (en)
WO (1) WO2002020471A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL206119B1 (en) 2003-10-06 2010-07-30 Yara International Asayara International Asa Method of improving the crushing strength, impact resistance and compressibility of urea, and urea composition
NO321761B1 (en) 2004-06-30 2006-07-03 Yara Int Asa Process for improving crushing strength and reducing dust formation and tendency to cook urea, particles, and use of carbohydrates and optionally polyvinyl compounds as additive to molten urea
US7824565B2 (en) * 2005-01-14 2010-11-02 Yara International Asa Urea composition having reduced compressibility, cake formation and dust formation, and process for its preparation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1217106A (en) * 1968-04-01 1970-12-31 Kurashiki Rayon Kk Anti-caking urea compositions
DD131062A3 (en) * 1973-09-06 1978-05-31 Friedrich Wolf METHOD FOR PRODUCING STORAGE-RICH DYES
SU698967A1 (en) * 1978-01-06 1979-11-25 Предприятие П/Я А-1676 Method of producing non-caking urea
US4587358A (en) * 1985-08-26 1986-05-06 Tennessee Valley Authority Production of high-strength, storage-stable particulate urea

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1217106A (en) * 1968-04-01 1970-12-31 Kurashiki Rayon Kk Anti-caking urea compositions
DD131062A3 (en) * 1973-09-06 1978-05-31 Friedrich Wolf METHOD FOR PRODUCING STORAGE-RICH DYES
SU698967A1 (en) * 1978-01-06 1979-11-25 Предприятие П/Я А-1676 Method of producing non-caking urea
US4587358A (en) * 1985-08-26 1986-05-06 Tennessee Valley Authority Production of high-strength, storage-stable particulate urea

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 107, no. 19, 1987, Columbus, Ohio, US; abstract no. 175082h, BARANYI: "Granulation of urea with addition of aluminium and zinc salts" XP002191014 *
CHEMICAL ABSTRACTS, vol. 94, no. 19, 11 May 1981, Columbus, Ohio, US; abstract no. 155642, KIRSANOV: "Increase in the mechanical strength of urea" XP002191013 *
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; KUZNETSOVA, A. E. ET AL: "Noncaking urea", XP002191015, retrieved from STN Database accession no. 92:75271 CA *
KHIM.PROM-ST., no. 1, 1981, pages 45 - 47 *

Also Published As

Publication number Publication date
EP1315688A2 (en) 2003-06-04
AU2001294392A1 (en) 2002-03-22
WO2002020471A2 (en) 2002-03-14

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