CA2091129A1 - Urea granules coated with melamine powder - Google Patents
Urea granules coated with melamine powderInfo
- Publication number
- CA2091129A1 CA2091129A1 CA002091129A CA2091129A CA2091129A1 CA 2091129 A1 CA2091129 A1 CA 2091129A1 CA 002091129 A CA002091129 A CA 002091129A CA 2091129 A CA2091129 A CA 2091129A CA 2091129 A1 CA2091129 A1 CA 2091129A1
- Authority
- CA
- Canada
- Prior art keywords
- melamine
- urea granules
- weight
- urea
- powder
- 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.)
- Abandoned
Links
Classifications
-
- 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
- C05C11/00—Other nitrogenous fertilisers
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/10—Feeding-stuffs specially adapted for particular animals for ruminants
- A23K50/15—Feeding-stuffs specially adapted for particular animals for ruminants containing substances which are metabolically converted to proteins, e.g. ammonium salts or urea
Landscapes
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Husbandry (AREA)
- Zoology (AREA)
- Birds (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fertilizers (AREA)
- Glanulating (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Medicinal Preparation (AREA)
Abstract
Abstract Urea granules coated with a powder in order to prevent clumping, where the powder coating comprises from 0.01 to 0.6 % by weight of melamine, based on the total weight of the urea granules.
Description
t.
~rea granule~ coated with ~elamine powder The invention relates to urea granules coa~ed with melamine powder in order to prevent clumping.
Many granuLated or crystalline indu~trial products, including urea, tend to clump on extended storage or during transportation. This property generally has an adverse effect on the quality, removal from storage, scattering pxoperties, grain stability, int~r alia.
In order to protect these products again~t clumping, it i8 known to coat them with a dust. Suitable ~usts are finely divided lime, kieselguhr, talc, clay~
and the like. Furthermore, DE-A-2,039,599 discloses that urea, mixed with biuret, ha~ virtually no tendency toward clumping. However, in order to reduce clumping, these agents must be added in larqe amounts in order to achieve a satisfactory action.
Furthermore, US Patent 3,837,835 discloses that granular substance~, such as, for example, fertilizers based on ammonium nitrata, can be trea~ed with s-~ri-azines which are substituted by relatively lon~ alkyl chains or by ether groups. However, substituted s-tri-azin~s of this type are relatively complex compounds which~ in addition, have an in~er~ering effect during any ~5 further conversion o~ the urea granules into melamine.
It has now been found, unexpectedly, that clump-ing of urea granule~ can be reduced to a large extent by admixiny melamine powder with the urea granules.
The invention therefore relates to urea granules ~hich haYe been coated with a powder in order to preYent clumping, which are char~cterized in that the po~der coating comprises from 0.01 to 0.6 percent by weight of melamine, ba~ed on the total w2ight of the urea granules.
Melamine can be employed here as a commercially available, purified product. However, it is also possible ~o use Lmpure melamine from the melamine syn~hesis process~ known as mother liquor melamine, since the small 0~29 amounts of impurities, for example, ammelinP or a~melide, do not have any interfering effect during any further conversion of the urea granules into melamine, since the~e impurities are for the moat part re~converted into melamine in the melamine process.
Even if the urea granules coated with mother liquor melamine are usedt for example in the fertilizer or feeds industries, no disadvantage arises due to the small amounts of impurities. The mel~mine in powder form is admixed with the urea granules in powder drum~, vibration channels or other suitable devic~s at room t~mperature. In order to ~implify distribution onto the urea granules and in order to achieve a uniform action with the greatest possible e~fect u~ing the smalle3t possible amount of additive, melamine i8 used in the most finely divided form possible. The duration of the mixi~g operation depends on the choice of mixing unit and on the desired throughput. The amount of melamine is from 0oO1 to 0.6 % by weight, preferably from about 0.02 to 0.4 ~
by weight, based on the total weight of the urea granules.
The reduction in clumping of urea due to admix-ture of melamine was determined by determining the hear force by the method of Jenike (for example Chem. Tech-nologie, Winnacker-K~chlex, 4th Edition, Volume 1, page 120). In thi~ determination, the s~mple8 were in each CaBe loaded for 23 hours at room temperature with a piston having a surface area of 22.9 cm2 or a diameter of 5.4 cm. ~he pre~ure exerted was 15.5 N/c~2.
The experiments carried out show that, after admixture of 0.1 ~ by weight or 0.035 ~ by weight of pure melamlne or of 0.1 ~ by weight of mother liquor melamine;
the shear force was reduced by up to in excs~s of 50 %, wherea~ ~ig~ificantly larger amounts, for example 5 % by weight, had to be added to achieve the ~ame action in the case of dust~ alrea~y known from the lit~rature, such a , for example, biuret.
2~9~29 ~xample 1:
1000 g of urea granule~ having a water content of 0.26 %, determined by the method of Karl-Fischer, were mixed with 1 g (0.1 % by weight) or 2 g ~0.2 % by weight) of melamisle having a water content of 0.13 ~ ~y weight for lS minutes by means of a laboratory mixer. Admixture of only 0.1 ~ of melamine reduced th~ shear force from 43.7 N by half (22 N~. Admixture of 0.2 % of melamine achieved a reduction in the ~hear force to 16.8 N.
~xample 2:
1000 g of urea granules having a water content of 0O25 % ~y weight, were mixed with 1 g (0.1 % by weight~
of mother liguor melamine having a water content of 1.3 by weight for 15 minute~ in a laboratory mixer. A reduc-tion in the shear force from 24.2 N to 14.0 N wa8 achieved.
~xample 3:
37,500 g of urea granules having a water content of 0.30 ~ were mixed with melamine having a water content of 0. 06 ~ for 15 minutes in a concrete mixer. Addition o 13 g (0.035 % by weight) of melamine, ba~ed on the urea granule~, reduced the shear force by mora than hal~, from 52.2 N to 22.5 N.
Bxample 4: Comparative ~xample 1000 g of urea granule~ having a wat0r content of 0.26 % were mixed with biuret, p.a. grade from Merck, having a water content of 2.9~ % for 15 minute~ in a laboratory mixer. Only on admixture of 53 g (5 % by weight) of biuret was an approximate halving of the shear force from 50 N to 29 N achieved.
~rea granule~ coated with ~elamine powder The invention relates to urea granules coa~ed with melamine powder in order to prevent clumping.
Many granuLated or crystalline indu~trial products, including urea, tend to clump on extended storage or during transportation. This property generally has an adverse effect on the quality, removal from storage, scattering pxoperties, grain stability, int~r alia.
In order to protect these products again~t clumping, it i8 known to coat them with a dust. Suitable ~usts are finely divided lime, kieselguhr, talc, clay~
and the like. Furthermore, DE-A-2,039,599 discloses that urea, mixed with biuret, ha~ virtually no tendency toward clumping. However, in order to reduce clumping, these agents must be added in larqe amounts in order to achieve a satisfactory action.
Furthermore, US Patent 3,837,835 discloses that granular substance~, such as, for example, fertilizers based on ammonium nitrata, can be trea~ed with s-~ri-azines which are substituted by relatively lon~ alkyl chains or by ether groups. However, substituted s-tri-azin~s of this type are relatively complex compounds which~ in addition, have an in~er~ering effect during any ~5 further conversion o~ the urea granules into melamine.
It has now been found, unexpectedly, that clump-ing of urea granule~ can be reduced to a large extent by admixiny melamine powder with the urea granules.
The invention therefore relates to urea granules ~hich haYe been coated with a powder in order to preYent clumping, which are char~cterized in that the po~der coating comprises from 0.01 to 0.6 percent by weight of melamine, ba~ed on the total w2ight of the urea granules.
Melamine can be employed here as a commercially available, purified product. However, it is also possible ~o use Lmpure melamine from the melamine syn~hesis process~ known as mother liquor melamine, since the small 0~29 amounts of impurities, for example, ammelinP or a~melide, do not have any interfering effect during any further conversion of the urea granules into melamine, since the~e impurities are for the moat part re~converted into melamine in the melamine process.
Even if the urea granules coated with mother liquor melamine are usedt for example in the fertilizer or feeds industries, no disadvantage arises due to the small amounts of impurities. The mel~mine in powder form is admixed with the urea granules in powder drum~, vibration channels or other suitable devic~s at room t~mperature. In order to ~implify distribution onto the urea granules and in order to achieve a uniform action with the greatest possible e~fect u~ing the smalle3t possible amount of additive, melamine i8 used in the most finely divided form possible. The duration of the mixi~g operation depends on the choice of mixing unit and on the desired throughput. The amount of melamine is from 0oO1 to 0.6 % by weight, preferably from about 0.02 to 0.4 ~
by weight, based on the total weight of the urea granules.
The reduction in clumping of urea due to admix-ture of melamine was determined by determining the hear force by the method of Jenike (for example Chem. Tech-nologie, Winnacker-K~chlex, 4th Edition, Volume 1, page 120). In thi~ determination, the s~mple8 were in each CaBe loaded for 23 hours at room temperature with a piston having a surface area of 22.9 cm2 or a diameter of 5.4 cm. ~he pre~ure exerted was 15.5 N/c~2.
The experiments carried out show that, after admixture of 0.1 ~ by weight or 0.035 ~ by weight of pure melamlne or of 0.1 ~ by weight of mother liquor melamine;
the shear force was reduced by up to in excs~s of 50 %, wherea~ ~ig~ificantly larger amounts, for example 5 % by weight, had to be added to achieve the ~ame action in the case of dust~ alrea~y known from the lit~rature, such a , for example, biuret.
2~9~29 ~xample 1:
1000 g of urea granule~ having a water content of 0.26 %, determined by the method of Karl-Fischer, were mixed with 1 g (0.1 % by weight) or 2 g ~0.2 % by weight) of melamisle having a water content of 0.13 ~ ~y weight for lS minutes by means of a laboratory mixer. Admixture of only 0.1 ~ of melamine reduced th~ shear force from 43.7 N by half (22 N~. Admixture of 0.2 % of melamine achieved a reduction in the ~hear force to 16.8 N.
~xample 2:
1000 g of urea granules having a water content of 0O25 % ~y weight, were mixed with 1 g (0.1 % by weight~
of mother liguor melamine having a water content of 1.3 by weight for 15 minute~ in a laboratory mixer. A reduc-tion in the shear force from 24.2 N to 14.0 N wa8 achieved.
~xample 3:
37,500 g of urea granules having a water content of 0.30 ~ were mixed with melamine having a water content of 0. 06 ~ for 15 minutes in a concrete mixer. Addition o 13 g (0.035 % by weight) of melamine, ba~ed on the urea granule~, reduced the shear force by mora than hal~, from 52.2 N to 22.5 N.
Bxample 4: Comparative ~xample 1000 g of urea granule~ having a wat0r content of 0.26 % were mixed with biuret, p.a. grade from Merck, having a water content of 2.9~ % for 15 minute~ in a laboratory mixer. Only on admixture of 53 g (5 % by weight) of biuret was an approximate halving of the shear force from 50 N to 29 N achieved.
Claims (4)
1. Urea granules coated with powder in order to prevent clumping, characterized in that the powder coating comprises from 0.01 to 0.6 % by weight of melamine, based on the total weight of the urea granules.
2. Urea granules according to claim 1,characterized in that the powder coating comprises from 0.02 to 0.4 %
by weight of melamine, based on the total weight of the urea granules.
by weight of melamine, based on the total weight of the urea granules.
3. Urea granules according to claim 1, characterized in that the powder coating comprises impure mother liquor melamine produced in the melamine synthesis process.
4. Use of the urea granules according to claim 1 in the melamine synthesis.
O.Z. 970 10.03.1992
O.Z. 970 10.03.1992
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA544/92 | 1992-03-18 | ||
| AT0054492A AT397503B (en) | 1992-03-18 | 1992-03-18 | UREA GRANULATE WITH A MELAMINE POWDER LAYER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2091129A1 true CA2091129A1 (en) | 1993-09-19 |
Family
ID=3493417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002091129A Abandoned CA2091129A1 (en) | 1992-03-18 | 1993-03-05 | Urea granules coated with melamine powder |
Country Status (21)
| Country | Link |
|---|---|
| EP (1) | EP0561235B1 (en) |
| JP (1) | JPH0753287A (en) |
| KR (1) | KR930019590A (en) |
| CN (1) | CN1078453A (en) |
| AR (1) | AR247830A1 (en) |
| AT (2) | AT397503B (en) |
| AU (1) | AU3406193A (en) |
| BR (1) | BR9301227A (en) |
| CA (1) | CA2091129A1 (en) |
| CZ (1) | CZ43793A3 (en) |
| DE (1) | DE59302552D1 (en) |
| HR (1) | HRP930372A2 (en) |
| HU (1) | HU210739B (en) |
| LV (1) | LV10445A (en) |
| MX (1) | MX9301529A (en) |
| NZ (1) | NZ247034A (en) |
| PL (1) | PL298091A1 (en) |
| SI (1) | SI9300132A (en) |
| SK (1) | SK21293A3 (en) |
| TR (1) | TR26944A (en) |
| ZA (1) | ZA931790B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB876676A (en) * | 1958-12-17 | 1961-09-06 | Ici Ltd | Improvements in and relating to urea compositions |
| DE1164392B (en) * | 1963-02-06 | 1964-03-05 | Basf Ag | Process for the production of shelf stable, non-caking urea |
| US3202501A (en) * | 1963-03-12 | 1965-08-24 | Stockholms Superfosfat Fab Ab | Anticaking agents |
| DE1178057B (en) * | 1963-03-16 | 1964-09-17 | Basf Ag | Process for the production of storage-stable urea |
| CH421938A (en) * | 1963-10-24 | 1966-10-15 | Lonza Ag | Process for improving the storage properties of urea |
| FR1557853A (en) * | 1968-01-02 | 1969-02-21 | ||
| DE2039599A1 (en) * | 1970-08-10 | 1972-02-17 | Union Rheinische Braunkohlen | Feed urea |
| BE790487A (en) * | 1971-10-25 | 1973-04-24 | Chemie Linz Ag | PROCESS FOR THE PRODUCTION OF GRANULAR FERTILIZERS WHICH DO NOT FORM DUST AND DO NOT AGGLOMERATE IN MASS |
| DE2922436A1 (en) * | 1979-06-01 | 1980-12-18 | Sueddeutsche Kalkstickstoff | METHOD FOR OBTAINING UREA GRAINS WITH IMPROVED PROPERTIES |
| DD145370A1 (en) * | 1979-08-02 | 1980-12-10 | Friedrich Wolf | METHOD FOR THE PRODUCTION OF GRANULATED UREA |
-
1992
- 1992-03-18 AT AT0054492A patent/AT397503B/en not_active IP Right Cessation
-
1993
- 1993-03-01 NZ NZ247034A patent/NZ247034A/en unknown
- 1993-03-05 DE DE59302552T patent/DE59302552D1/en not_active Expired - Fee Related
- 1993-03-05 EP EP93103529A patent/EP0561235B1/en not_active Expired - Lifetime
- 1993-03-05 AT AT93103529T patent/ATE137993T1/en active
- 1993-03-05 CA CA002091129A patent/CA2091129A1/en not_active Abandoned
- 1993-03-08 AU AU34061/93A patent/AU3406193A/en not_active Abandoned
- 1993-03-12 ZA ZA931790A patent/ZA931790B/en unknown
- 1993-03-12 JP JP5052422A patent/JPH0753287A/en not_active Withdrawn
- 1993-03-16 HR HR930372A patent/HRP930372A2/en not_active Application Discontinuation
- 1993-03-16 KR KR1019930003971A patent/KR930019590A/en not_active Application Discontinuation
- 1993-03-16 PL PL29809193A patent/PL298091A1/en unknown
- 1993-03-17 SK SK21293A patent/SK21293A3/en unknown
- 1993-03-17 TR TR00244/93A patent/TR26944A/en unknown
- 1993-03-17 HU HU9300760A patent/HU210739B/en not_active IP Right Cessation
- 1993-03-17 CN CN 93104065 patent/CN1078453A/en active Pending
- 1993-03-18 AR AR93324536A patent/AR247830A1/en active
- 1993-03-18 BR BR9301227A patent/BR9301227A/en not_active Application Discontinuation
- 1993-03-18 LV LV930258A patent/LV10445A/en unknown
- 1993-03-18 MX MX9301529A patent/MX9301529A/en not_active Application Discontinuation
- 1993-03-18 SI SI19939300132A patent/SI9300132A/en unknown
- 1993-03-18 CZ CZ93437A patent/CZ43793A3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AT397503B (en) | 1994-04-25 |
| NZ247034A (en) | 1994-06-27 |
| HRP930372A2 (en) | 1995-08-31 |
| EP0561235A3 (en) | 1993-11-03 |
| CZ43793A3 (en) | 1993-12-15 |
| HU9300760D0 (en) | 1993-07-28 |
| BR9301227A (en) | 1993-09-21 |
| PL298091A1 (en) | 1993-11-15 |
| AU3406193A (en) | 1993-09-23 |
| EP0561235A2 (en) | 1993-09-22 |
| AR247830A1 (en) | 1995-04-28 |
| DE59302552D1 (en) | 1996-06-20 |
| EP0561235B1 (en) | 1996-05-15 |
| TR26944A (en) | 1994-08-29 |
| SK21293A3 (en) | 1993-10-06 |
| CN1078453A (en) | 1993-11-17 |
| ZA931790B (en) | 1993-09-30 |
| MX9301529A (en) | 1994-01-31 |
| SI9300132A (en) | 1993-09-30 |
| LV10445A (en) | 1995-02-20 |
| ATE137993T1 (en) | 1996-06-15 |
| JPH0753287A (en) | 1995-02-28 |
| KR930019590A (en) | 1993-10-18 |
| ATA54492A (en) | 1993-09-15 |
| HUT63620A (en) | 1993-09-28 |
| HU210739B (en) | 1995-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |