GB832293A - A process for concentrating urea solutions - Google Patents
A process for concentrating urea solutionsInfo
- Publication number
- GB832293A GB832293A GB38923/57A GB3892357A GB832293A GB 832293 A GB832293 A GB 832293A GB 38923/57 A GB38923/57 A GB 38923/57A GB 3892357 A GB3892357 A GB 3892357A GB 832293 A GB832293 A GB 832293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- urea
- liquid
- inert
- recovered
- inert liquid
- 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
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
- C07C273/16—Separation; Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Aqueous urea solutions are concentrated by bringing the aqueous urea into a chamber at a pressure of less than 200 mm. Hg and containing a liquid which is inert to and does not mix with urea and at a temperature such that the urea solution separates into water vapour which is removed and solid urea which is dispersed in the inert liquid and subsequently recovered. The inert liquid may be a mineral oil and should have a low vapour pressure at the temperature and pressure used. The urea may be recovered by heating to melt the urea and separating the urea layer from the inert liquid; the liquid urea may be sprayed conventionally to obtain it in granular form. Where urea has been synthesized in a viscous inert liquid, e.g. mineral oil, the reaction mixture may be passed to the evaporating chamber and urea recovered dispersed in the viscous liquid. Two stages may be used in series. Specification 819,030 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL832293X | 1956-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB832293A true GB832293A (en) | 1960-04-06 |
Family
ID=19843007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB38923/57A Expired GB832293A (en) | 1956-12-15 | 1957-12-13 | A process for concentrating urea solutions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB832293A (en) |
-
1957
- 1957-12-13 GB GB38923/57A patent/GB832293A/en not_active Expired
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