FR2429194A1 - METHYLENE-UREA LIQUID FERTILIZERS AND THEIR PREPARATION PROCESS - Google Patents
METHYLENE-UREA LIQUID FERTILIZERS AND THEIR PREPARATION PROCESSInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0095913A2 (en) * | 1982-05-27 | 1983-12-07 | Montedison S.p.A. | A process for preparing fertilizers |
Families Citing this family (1)
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)
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 |
-
1979
- 1979-06-14 IT IT23588/79A patent/IT1121801B/en active
- 1979-06-18 GB GB7921166A patent/GB2025387A/en not_active Withdrawn
- 1979-06-19 FR FR7915696A patent/FR2429194A1/en active Granted
- 1979-06-19 DE DE19792924693 patent/DE2924693A1/en not_active Ceased
- 1979-06-19 BE BE0/195840A patent/BE877100A/en unknown
Patent Citations (7)
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 (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0095913A2 (en) * | 1982-05-27 | 1983-12-07 | Montedison S.p.A. | A process for preparing fertilizers |
EP0095913A3 (en) * | 1982-05-27 | 1984-04-11 | Montedison S.P.A. | A process for preparing fertilizers |
Also Published As
Publication number | Publication date |
---|---|
FR2429194B1 (en) | 1983-01-21 |
DE2924693A1 (en) | 1980-01-10 |
IT7923588A0 (en) | 1979-06-14 |
BE877100A (en) | 1979-10-15 |
GB2025387A (en) | 1980-01-23 |
IT1121801B (en) | 1986-04-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |