ES332202A1 - A procedure for the recyclation of ammonia and carbon dioxide not converted in urea, to the autoclave of synthesis, in the urea synthesis. (Machine-translation by Google Translate, not legally binding) - Google Patents
A procedure for the recyclation of ammonia and carbon dioxide not converted in urea, to the autoclave of synthesis, in the urea synthesis. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES332202A1 ES332202A1 ES0332202A ES332202A ES332202A1 ES 332202 A1 ES332202 A1 ES 332202A1 ES 0332202 A ES0332202 A ES 0332202A ES 332202 A ES332202 A ES 332202A ES 332202 A1 ES332202 A1 ES 332202A1
- Authority
- ES
- Spain
- Prior art keywords
- ammonia
- expansion
- urea
- carbon dioxide
- synthesis
- 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
- C07C273/04—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 from carbon dioxide and ammonia
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A procedure for the recycling of ammonia and carbon dioxide not converted to urea, to the synthesis autoclave, in the synthesis of urea from ammonia and carbon dioxide carried out with excess ammonia at elevated pressure and at elevated temperature, characterized in that the mixture of urea, water, ammonium carbamate and excess ammonia, which exits, from the synthesis autoclave that is under high pressure, is expanded in (at least) two stages of pressure for the separation of the exhaust gases not converted to urea , so that the expansion gases of ammonia and carbon dioxide that result in the first expansion stage, together with the gases expelled from the melt remaining by heating at the same pressure, which consist of excess ammonia and ammonia and carbon dioxide from decomposed ammonium carbamate, are conducted to a condenser that is under the same pressure, and because the expansion and decomposition resulting in a second stage of expansion under lower pressure, are absorbed in aqueous solution of ammonium carbonate, solution that is then brought to the pressure of the first stage of expansion and is released by heating the absorbed ammonia and carbon dioxide , after which the expelled gases, considerably dehydrated, are conducted to the condenser which is under the same pressure as the first stage of expansion and there they are condensed together with the expansion and decomposition gases of the first stage of expansion to obtain a Very concentrated solution of ammonia and carbon dioxide in little water, solution that is then pumped back to the synthesis reactor. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1427665A CH456569A (en) | 1965-10-15 | 1965-10-15 | Process for the separation and recycling of starting gases not converted in the synthesis of urea from ammonia and carbon dioxide into the synthesis reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES332202A1 true ES332202A1 (en) | 1967-11-16 |
Family
ID=4399474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0332202A Expired ES332202A1 (en) | 1965-10-15 | 1966-10-13 | A procedure for the recyclation of ammonia and carbon dioxide not converted in urea, to the autoclave of synthesis, in the urea synthesis. (Machine-translation by Google Translate, not legally binding) |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH456569A (en) |
| DE (1) | DE1568879A1 (en) |
| ES (1) | ES332202A1 (en) |
| NL (1) | NL6614496A (en) |
-
1965
- 1965-10-15 CH CH1427665A patent/CH456569A/en unknown
-
1966
- 1966-09-30 DE DE19661568879 patent/DE1568879A1/en active Pending
- 1966-10-13 ES ES0332202A patent/ES332202A1/en not_active Expired
- 1966-10-14 NL NL6614496A patent/NL6614496A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH456569A (en) | 1968-07-31 |
| DE1568879A1 (en) | 1970-04-02 |
| NL6614496A (en) | 1967-04-17 |
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