FR2429194A1 - METHYLENE-UREA LIQUID FERTILIZERS AND THEIR PREPARATION PROCESS - Google Patents

METHYLENE-UREA LIQUID FERTILIZERS AND THEIR PREPARATION PROCESS

Info

Publication number
FR2429194A1
FR2429194A1 FR7915696A FR7915696A FR2429194A1 FR 2429194 A1 FR2429194 A1 FR 2429194A1 FR 7915696 A FR7915696 A FR 7915696A FR 7915696 A FR7915696 A FR 7915696A FR 2429194 A1 FR2429194 A1 FR 2429194A1
Authority
FR
France
Prior art keywords
urea
nitrogen
leaves
degrees
stage
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.)
Granted
Application number
FR7915696A
Other languages
French (fr)
Other versions
FR2429194B1 (en
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.)
Ashland LLC
Original Assignee
Ashland Oil Inc
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 Ashland Oil Inc filed Critical Ashland Oil Inc
Publication of FR2429194A1 publication Critical patent/FR2429194A1/en
Application granted granted Critical
Publication of FR2429194B1 publication Critical patent/FR2429194B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/02—Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/20—Liquid fertilisers
    • C05G5/23—Solutions
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/20—Liquid fertilisers
    • C05G5/27—Dispersions, e.g. suspensions or emulsions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Dispersion Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

On prépare des engrais liquides à base de méthylène-urées constitués de solutions aqueuses de mono- di- et triméthylène-urées constituant une source efficace d'azote pour les végétaux, dans lesquels moins de 25 % de l'azote total sont insolubles dans l'eau chaude, selon un procédé constitué d'un premier stade dans lequel on fait réagir l'urée et le formaldéhyde dans des rapports molaires inférieurs à 1 entre 80 et 105 degrés C à un pH de 4,7 à 5,2, pour former des composés méthyléniques de bas poids moléculaire ayant des teneurs relativement faibles en azote et un second stade dans lequel on abaisse la température à 55-75 degrés C et le pH à 3,5-4,5, on ajoute de l'urée pour porter le rapport de l'urée au formaldéhyde à une valeur de 1,4 à 3,0 et on fait réagir pendant 30 à 90 minutes pour obtenir des quantités importantes de monométhylène-diurée, diméthylène-triurée et triméthylène-tétraurée. L'invention concerne en particulier des engrais destinés à être appliqués directement aux feuilles des cultures et des gazons sans risque d'altération ou de brûlures des feuilles.Liquid methylene urea-based fertilizers are prepared consisting of aqueous solutions of mono-di- and trimethylene-ureas constituting an efficient source of nitrogen for plants, in which less than 25% of the total nitrogen is insoluble in the nitrogen. hot water, according to a process consisting of a first stage in which urea and formaldehyde are reacted in molar ratios of less than 1 between 80 and 105 degrees C at a pH of 4.7 to 5.2, to to form low molecular weight methylenic compounds having relatively low nitrogen contents and a second stage in which the temperature is lowered to 55-75 degrees C and the pH to 3.5-4.5, urea is added to bring the urea to formaldehyde ratio to a value of 1.4 to 3.0 and react for 30 to 90 minutes to obtain significant amounts of monomethylene diurea, dimethylene triurea and trimethylene tetraurea. The invention relates in particular to fertilizers intended to be applied directly to the leaves of crops and lawns without risk of spoilage or burns of the leaves.

FR7915696A 1978-06-19 1979-06-19 METHYLENE-UREA LIQUID FERTILIZERS AND THEIR PREPARATION PROCESS Granted FR2429194A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US91688078A 1978-06-19 1978-06-19

Publications (2)

Publication Number Publication Date
FR2429194A1 true FR2429194A1 (en) 1980-01-18
FR2429194B1 FR2429194B1 (en) 1983-01-21

Family

ID=25437984

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7915696A Granted FR2429194A1 (en) 1978-06-19 1979-06-19 METHYLENE-UREA LIQUID FERTILIZERS AND THEIR PREPARATION PROCESS

Country Status (5)

Country Link
BE (1) BE877100A (en)
DE (1) DE2924693A1 (en)
FR (1) FR2429194A1 (en)
GB (1) GB2025387A (en)
IT (1) IT1121801B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095913A3 (en) * 1982-05-27 1984-04-11 Montedison S.P.A. A process for preparing fertilizers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20010877A1 (en) 2001-04-26 2002-10-26 Sadepan Chimica S R L PROCEDURE FOR THE MANUFACTURE OF A VERY HIGH STABILITY AND CONTROLLED RELEASE NITROGEN AND FERTILIZAN LIQUID FERTILIZER

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232740A (en) * 1962-10-24 1966-02-01 Exxon Research Engineering Co Agricultural nutrient containing urea
FR1570129A (en) * 1967-06-06 1969-06-06
US3649598A (en) * 1969-08-22 1972-03-14 Sumitomo Chemical Co Method for producing condensation products of urea and formaldehyde using sodium borate as an alkalizer
FR2103997A5 (en) * 1970-08-06 1972-04-14 Azote Sa Cie Neerlandaise
FR2160273A1 (en) * 1971-11-17 1973-06-29 Mitsui Toatsu Chemicals Slow-acting nitrogenous fertilizers - contg condensates of urea, formaldehyde and acetaldehyde
FR2308606A1 (en) * 1975-04-22 1976-11-19 Chem & Phosphates Ltd NEW FORMAL UREE-ALDEHYDE FERTILIZER
US4033745A (en) * 1976-06-03 1977-07-05 Slo Release, Inc. Non-burning storable liquid fertilizer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232740A (en) * 1962-10-24 1966-02-01 Exxon Research Engineering Co Agricultural nutrient containing urea
FR1570129A (en) * 1967-06-06 1969-06-06
US3649598A (en) * 1969-08-22 1972-03-14 Sumitomo Chemical Co Method for producing condensation products of urea and formaldehyde using sodium borate as an alkalizer
FR2103997A5 (en) * 1970-08-06 1972-04-14 Azote Sa Cie Neerlandaise
FR2160273A1 (en) * 1971-11-17 1973-06-29 Mitsui Toatsu Chemicals Slow-acting nitrogenous fertilizers - contg condensates of urea, formaldehyde and acetaldehyde
FR2308606A1 (en) * 1975-04-22 1976-11-19 Chem & Phosphates Ltd NEW FORMAL UREE-ALDEHYDE FERTILIZER
US4033745A (en) * 1976-06-03 1977-07-05 Slo Release, Inc. Non-burning storable liquid fertilizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095913A3 (en) * 1982-05-27 1984-04-11 Montedison S.P.A. A process for preparing fertilizers

Also Published As

Publication number Publication date
IT7923588A0 (en) 1979-06-14
GB2025387A (en) 1980-01-23
IT1121801B (en) 1986-04-23
FR2429194B1 (en) 1983-01-21
DE2924693A1 (en) 1980-01-10
BE877100A (en) 1979-10-15

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