CH509275A - Procédé de production d'urée en granules à faible teneur en biuret - Google Patents

Procédé de production d'urée en granules à faible teneur en biuret

Info

Publication number
CH509275A
CH509275A CH851670A CH851670A CH509275A CH 509275 A CH509275 A CH 509275A CH 851670 A CH851670 A CH 851670A CH 851670 A CH851670 A CH 851670A CH 509275 A CH509275 A CH 509275A
Authority
CH
Switzerland
Prior art keywords
granular urea
producing granular
biuret content
low biuret
low
Prior art date
Application number
CH851670A
Other languages
English (en)
Inventor
Zardi Umberto
Donato Milanese San
Lagana Vincenzo
Mantegazza Carlo
Original Assignee
Snam Progetti
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 Snam Progetti filed Critical Snam Progetti
Publication of CH509275A publication Critical patent/CH509275A/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/005—Post-treatment
    • 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
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Fertilizers (AREA)
CH851670A 1969-05-29 1970-05-29 Procédé de production d'urée en granules à faible teneur en biuret CH509275A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1749969 1969-05-29

Publications (1)

Publication Number Publication Date
CH509275A true CH509275A (fr) 1971-06-30

Family

ID=11150389

Family Applications (1)

Application Number Title Priority Date Filing Date
CH851670A CH509275A (fr) 1969-05-29 1970-05-29 Procédé de production d'urée en granules à faible teneur en biuret

Country Status (16)

Country Link
US (1) US3936499A (fr)
JP (1) JPS4919263B1 (fr)
AT (1) AT309458B (fr)
BE (1) BE751232A (fr)
CH (1) CH509275A (fr)
CS (1) CS157663B2 (fr)
DE (1) DE2026373B2 (fr)
ES (1) ES380871A1 (fr)
FR (1) FR2048809A5 (fr)
GB (1) GB1284524A (fr)
IE (1) IE34221B1 (fr)
LU (1) LU61021A1 (fr)
NL (1) NL169466B (fr)
NO (1) NO134420C (fr)
RO (1) RO60516A2 (fr)
YU (1) YU34031B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5514307A (en) * 1992-10-13 1996-05-07 Laroche Industries, Inc. Process for the reducing emissions during prilling of material such as ammonium nitrate
US6277311B1 (en) 1999-08-10 2001-08-21 Costal States Management Corporation Method of forming flowable urea having low biuret content
US7862642B2 (en) * 2006-12-14 2011-01-04 Georgia-Pacific Chemicals Llc Extended-release urea-based granular fertilizer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025571A (en) * 1960-01-29 1962-03-20 Du Pont Process for producing prilled urea of low biuret content
US3398191A (en) * 1963-12-09 1968-08-20 Cominco Ltd Process for the production of granular nitrogenous compounds

Also Published As

Publication number Publication date
DE2026373B2 (de) 1973-03-01
CS157663B2 (fr) 1974-09-16
IE34221L (en) 1970-11-29
JPS4919263B1 (fr) 1974-05-16
NL169466B (nl) 1982-02-16
IE34221B1 (en) 1975-03-05
NO134420C (no) 1978-08-17
DE2026373A1 (de) 1970-12-17
NL7007479A (fr) 1970-12-01
NO134420B (fr) 1976-06-28
AT309458B (de) 1973-08-27
GB1284524A (en) 1972-08-09
RO60516A2 (fr) 1976-06-20
LU61021A1 (fr) 1970-07-29
YU130070A (en) 1978-05-15
YU34031B (en) 1978-10-31
ES380871A1 (es) 1972-09-16
FR2048809A5 (fr) 1971-03-19
BE751232A (fr) 1970-11-03
US3936499A (en) 1976-02-03

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Legal Events

Date Code Title Description
PL Patent ceased