GB937447A - Improvements in and relating to the pelleting of prillable chemical materials - Google Patents
Improvements in and relating to the pelleting of prillable chemical materialsInfo
- Publication number
- GB937447A GB937447A GB2806761A GB2806761A GB937447A GB 937447 A GB937447 A GB 937447A GB 2806761 A GB2806761 A GB 2806761A GB 2806761 A GB2806761 A GB 2806761A GB 937447 A GB937447 A GB 937447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- pellets
- molten
- contact
- ammonium nitrate
- 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.)
- Expired
Links
Classifications
-
- 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
-
- 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
- B01J2/06—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 in a liquid medium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/44—Preparation in the form of granules, pieces, or other shaped products
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
- C05C1/02—Granulation; Pelletisation; Stabilisation; Colouring
Abstract
Ammonium nitrate and caustic soda pellets are formed by bringing discrete molten quantities of the material into contact with an organic cooling liquid such as liquid halogenated aliphatic hydrocarbons for ammonium nitrate and unsubstituted hydrocarbons and unreactive halogenated hydrocarbons for caustic soda. The cooling liquid must have a boiling point lower than the temperature of the molten material at the time of contact so that the liquid provides a vapour filled region between the pellets and the liquid until the pellets have assumed a quasispherical shape. Surface active agents can be added to the molten ammonium nitrate such as the condensation product of formaldehyde with the disodium salt of methylene dinaphthalene sulphonic acid and nonylphenol with ethylene oxide.ALSO:Urea pellets are formed by bringing discrete quantities of molten urea into contact with an organic cooling liquid such as a chlorinated aliphatic hydrocarbon or an unsubstituted aliphatic hydrocarbon, e.g. a petroleum fraction; the boiling point of the liquid must be lower than the temperature of the molten material at the time of contact so that the liquid around the material is vaporised to provide a vapor filled region between the pellets and the liquid until the pellets have assumed a quasi-spherical shape and then separating them from the liquid.ALSO:Ammonium nitrate and urea prills are formed by bringing discrete molten quantities of the material into contact with an organic cooling liquid such as carbon tetrachloride, trichloroethylene, perchloroethylene, tetrachloroethylene, chloroform, methylene chloride, methyl chloroform and other substituted methanes, ethanes and ethylenes in which hydrogen is replaced wholly or partly by bromine, fluorine or chlorine. For pelleting urea petroleum fractions may be used. Surface active agents can be added to the molten ammonium nitrate such as the condensation product of, formaldehyde with the disodium salt of methylene dinaphthalene sulphonic acid, and nonyl phenol with ethylene oxide. The boiling point of the liquid must be lower than the temperature of the molten material at the time of contact so that the liquid provides a vapour filled region between the pellets and the liquid until the pellets have assumed a quasi-spherical shape.ALSO:A process for pelleting ammonium nitrate, urea and sodium hydroxide comprises bringing discrete molten quantities of the material into contact with an organic cooling liquid in which the material is insoluble and the boiling point of which is lower than the temperature of the molten material at the time of contact so that the liquid around the material is vaporised to provide a vapour-filled region between the pellets and the liquid until the pellets have assumed a quasi-spherical shape and then separating them from the liquid. The molten material may be dropped into the liquid or a jet of the material may be injected directly on to a moving stream of a cooling liquid, or into a container. There are also examples describing the effects of different water content and additives in the pelleting material and various cooling liquids and jet sizes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU63581/60A AU247619B2 (en) | 1960-08-15 | Method of pelleting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB937447A true GB937447A (en) | 1963-09-18 |
Family
ID=3748377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2806761A Expired GB937447A (en) | 1960-08-15 | 1961-08-02 | Improvements in and relating to the pelleting of prillable chemical materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB937447A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600119699A1 (en) * | 2016-11-25 | 2018-05-25 | Eurotecnica Melamine Luxemburg Zweigniederlassung In Ittigen | PLANT AND PROCESS OF PRODUCTION OF SOLID UREA IN GRANULES |
| CN114073914A (en) * | 2020-08-21 | 2022-02-22 | 博特化工装置股份公司 | Granulating device |
-
1961
- 1961-08-02 GB GB2806761A patent/GB937447A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600119699A1 (en) * | 2016-11-25 | 2018-05-25 | Eurotecnica Melamine Luxemburg Zweigniederlassung In Ittigen | PLANT AND PROCESS OF PRODUCTION OF SOLID UREA IN GRANULES |
| WO2018096495A1 (en) * | 2016-11-25 | 2018-05-31 | Eurotecnica Melamine, Luxemburg, Zweigniederlassung In Ittigen | Plant and process for the production of solid urea in granules |
| CN114073914A (en) * | 2020-08-21 | 2022-02-22 | 博特化工装置股份公司 | Granulating device |
| WO2022038087A1 (en) * | 2020-08-21 | 2022-02-24 | Bertrams Chemieanlagen Ag | Apparatus and method for the granulation of alkali hydroxides |
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