DE1235288B - Verfahren zur Herstellung von Harnstoff mit verminderter Backneigung - Google Patents
Verfahren zur Herstellung von Harnstoff mit verminderter BackneigungInfo
- Publication number
- DE1235288B DE1235288B DEG36337A DEG0036337A DE1235288B DE 1235288 B DE1235288 B DE 1235288B DE G36337 A DEG36337 A DE G36337A DE G0036337 A DEG0036337 A DE G0036337A DE 1235288 B DE1235288 B DE 1235288B
- Authority
- DE
- Germany
- Prior art keywords
- crystals
- urea
- heated
- flame
- temperature
- 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.)
- Pending
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims description 49
- 239000004202 carbamide Substances 0.000 title claims description 49
- 238000000034 method Methods 0.000 title claims description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000013078 crystal Substances 0.000 claims description 81
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001140714 Citrus latifolia Species 0.000 description 1
- 239000001692 EU approved anti-caking agent Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/005—Post-treatment
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15482961A | 1961-11-24 | 1961-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1235288B true DE1235288B (de) | 1967-03-02 |
Family
ID=22552974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEG36337A Pending DE1235288B (de) | 1961-11-24 | 1962-11-07 | Verfahren zur Herstellung von Harnstoff mit verminderter Backneigung |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE1235288B (enrdf_load_stackoverflow) |
| FR (1) | FR1339400A (enrdf_load_stackoverflow) |
| GB (1) | GB953291A (enrdf_load_stackoverflow) |
| NL (1) | NL285729A (enrdf_load_stackoverflow) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT194867B (de) * | 1955-04-01 | 1958-01-25 | Inventa Ag | Verfahren zur Herstellung eines rieselfähigen, tropenfesten Harnstoffes |
| DE1168416B (de) * | 1962-10-08 | 1964-04-23 | Stamicarbon | Verfahren zur Herstellung biuretarmer Harnstoffprills |
-
0
- NL NL285729D patent/NL285729A/xx unknown
-
1962
- 1962-11-02 GB GB41600/62A patent/GB953291A/en not_active Expired
- 1962-11-07 DE DEG36337A patent/DE1235288B/de active Pending
- 1962-11-23 FR FR916366A patent/FR1339400A/fr not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT194867B (de) * | 1955-04-01 | 1958-01-25 | Inventa Ag | Verfahren zur Herstellung eines rieselfähigen, tropenfesten Harnstoffes |
| DE1168416B (de) * | 1962-10-08 | 1964-04-23 | Stamicarbon | Verfahren zur Herstellung biuretarmer Harnstoffprills |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1339400A (enrdf_load_stackoverflow) | 1963-10-04 |
| NL285729A (enrdf_load_stackoverflow) | |
| GB953291A (en) | 1964-03-25 |
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