DE3669873D1 - Hohe festigkeit und lagerbestaendigkeit aufweisende harnstoffkoerner und verfahren zur herstellung. - Google Patents

Hohe festigkeit und lagerbestaendigkeit aufweisende harnstoffkoerner und verfahren zur herstellung.

Info

Publication number
DE3669873D1
DE3669873D1 DE8686111136T DE3669873T DE3669873D1 DE 3669873 D1 DE3669873 D1 DE 3669873D1 DE 8686111136 T DE8686111136 T DE 8686111136T DE 3669873 T DE3669873 T DE 3669873T DE 3669873 D1 DE3669873 D1 DE 3669873D1
Authority
DE
Germany
Prior art keywords
production
high strength
storage life
grain grades
urea grain
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE8686111136T
Other languages
English (en)
Inventor
Glenn M Blouin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tennessee Valley Authority (ATV)
Original Assignee
Tennessee Valley Authority (ATV)
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 Tennessee Valley Authority (ATV) filed Critical Tennessee Valley Authority (ATV)
Application granted granted Critical
Publication of DE3669873D1 publication Critical patent/DE3669873D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/30—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using agents to prevent the granules sticking together; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Fertilizers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
DE8686111136T 1985-08-26 1986-08-12 Hohe festigkeit und lagerbestaendigkeit aufweisende harnstoffkoerner und verfahren zur herstellung. Expired - Lifetime DE3669873D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/769,095 US4587358A (en) 1985-08-26 1985-08-26 Production of high-strength, storage-stable particulate urea

Publications (1)

Publication Number Publication Date
DE3669873D1 true DE3669873D1 (de) 1990-05-03

Family

ID=25084445

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686111136T Expired - Lifetime DE3669873D1 (de) 1985-08-26 1986-08-12 Hohe festigkeit und lagerbestaendigkeit aufweisende harnstoffkoerner und verfahren zur herstellung.

Country Status (5)

Country Link
US (1) US4587358A (de)
EP (1) EP0216108B1 (de)
CA (1) CA1276803C (de)
DE (1) DE3669873D1 (de)
ES (1) ES2000228A6 (de)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786438A (en) * 1983-03-08 1988-11-22 Georgia-Pacific Corporation Lignosulfonate/urea binder for particulate composites
US4676821A (en) * 1986-12-12 1987-06-30 Tennessee Valley Authority Sulfur-coated urea
US5041153A (en) * 1987-03-10 1991-08-20 Daishowa Chemicals Inc. Lignosulfonate treated fertilizer particles
US4846871A (en) * 1987-03-10 1989-07-11 Reed Lignin Inc. Lignosulfonate treated fertilizer particles
US4994100A (en) * 1988-12-29 1991-02-19 Freeport Mcmoran Resource Partners Homogeneous granular nitrogen fertilizer
US5238480A (en) * 1989-06-29 1993-08-24 Vigoro Industries, Inc. Fertilizer compositions and method of making such compositions
US5174804A (en) * 1989-09-29 1992-12-29 Vigoro Industries, Inc. Fertilizer/pesticide composition and method of treating plants
US5360465A (en) * 1989-09-29 1994-11-01 Georgia-Pacific Corporation Particulate fertilizer dust control
US5032164A (en) * 1990-05-25 1991-07-16 Daishowa Chemicals, Inc. Modified lignosulfonate conditioning agent for urea particles
US5158026A (en) * 1990-12-26 1992-10-27 Ralph's Industrial Sewing Machine Company Kit assembly adapted for use with a programmable sewing machine
GB2253621B (en) * 1991-03-14 1994-11-23 Intevep Sa Fertilizer composition
US5328497A (en) * 1992-01-21 1994-07-12 Georgia-Pacific Corporation Particulate fertilizer dust control
US5316554A (en) * 1992-06-03 1994-05-31 Hansen Charles N Method for processing crystalline ammonium carbamate
US5501720A (en) * 1994-06-13 1996-03-26 Georgia-Pacific Corporation Spray-dried urea-formaldehyde and lignosulfonate compositions
US6030659A (en) * 1998-05-28 2000-02-29 Whitehurst Associates, Inc. Phosphate coated urea
US6217630B1 (en) 1999-05-03 2001-04-17 Cargill, Incorporated Conditioned fertilizer product, method for conditioning fertilizer, and method for using conditioned fertilizer product
WO2002020471A2 (en) * 2000-09-07 2002-03-14 Holland Novochem B.V. Method of improving the crushing strength and the impact resistance of urea, and urea composition
US6491736B1 (en) 2001-04-30 2002-12-10 Montana Sulphur & Chemical Company Polyhydric alcohol anti-dust agent for inorganic materials
US7237679B1 (en) 2001-09-04 2007-07-03 Aveka, Inc. Process for sizing particles and producing particles separated into size distributions
NO321761B1 (no) * 2004-06-30 2006-07-03 Yara Int Asa Fremgangsmate for a forbedre knusestyrke og redusere stovdannelse og tendens til kaking av urea, partikler, og anvendelse av karbohydrater og eventuelt polyvinylforbindelser som additiv til smeltet urea
CA2600771C (en) * 2005-04-18 2016-06-07 Dsm Ip Assets B.V. Process for the production of urea-comprising particles
US7862642B2 (en) * 2006-12-14 2011-01-04 Georgia-Pacific Chemicals Llc Extended-release urea-based granular fertilizer
US8986581B2 (en) 2012-07-27 2015-03-24 Carbron Basis Company Ltd. Biochar products and method of manufacture thereof
CN103396266A (zh) * 2013-08-12 2013-11-20 东营万鑫肥料有限公司 一种有机质缓释尿素及制备工艺
MX2016008719A (es) 2014-01-09 2016-09-06 Shell Int Research Fertilizador de urea con dureza mejorada.
AU2015205603B2 (en) * 2014-01-09 2017-08-10 Shell Internationale Research Maatschappij B.V. Fertiliser having reduced biuret content
CN108138028A (zh) 2015-10-08 2018-06-08 碳基有限公司 生物炭产品及其制造方法
EP3594194A1 (de) * 2018-07-12 2020-01-15 Casale Sa Harnstoffgranulationsverfahren
EP3995487A1 (de) * 2020-11-06 2022-05-11 Casale Sa Harnstoffprillverfahren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949238C (de) * 1954-10-22 1956-09-13 Basf Ag Verfahren zur UEberfuehrung von Harnstoffloesungen in feste, harte, gleichmaessige und lagerbestaendige Kuegelchen
US3697245A (en) * 1970-08-12 1972-10-10 Joseph T Dilday Coated fertilizer
JPS5424942B2 (de) * 1974-04-09 1979-08-24

Also Published As

Publication number Publication date
US4587358A (en) 1986-05-06
ES2000228A6 (es) 1988-01-16
EP0216108A1 (de) 1987-04-01
CA1276803C (en) 1990-11-27
EP0216108B1 (de) 1990-03-28

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee