BE332036A - - Google Patents
Info
- Publication number
- BE332036A BE332036A BE332036DA BE332036A BE 332036 A BE332036 A BE 332036A BE 332036D A BE332036D A BE 332036DA BE 332036 A BE332036 A BE 332036A
- Authority
- BE
- Belgium
- Prior art keywords
- alkali
- gas mixture
- sodium
- ammonia
- synthesis
- Prior art date
Links
- 239000007789 gas Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 4
- 150000001408 amides Chemical class 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 230000002194 synthesizing Effects 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ODZPKZBBUMBTMG-UHFFFAOYSA-N Sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 sodium Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/04—Preparation of ammonia by synthesis in the gas phase
- C01C1/0405—Preparation of ammonia by synthesis in the gas phase from N2 and H2 in presence of a catalyst
-
- 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
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Description
<Desc/Clms Page number 1>
"PROCEDE DE FABRICATION SYNTHETIQUE DE L'AMMONIAQUE A PARTIR DE SES ELEMENTS"
Lorsque,dans la synthèse de l'ammoniaque, on fait usage de catalyseurs très actifs, on constate que ces derniers sont ex- trêmement sensibles aux plus minimes traces d'impuretés, telles .que l'oxygène, la vapeur d'eau et l'oxyde de carbone, en présence dans le mélange gazeux employé pour la synthèse, et que, par con- séquent, la durée de leur existence est très limitée.
On a essayé de diverses manières de débarrasser le mélange gazeux de ces impuretés, avant la catalyse, par l'action d'agents d'épuration spéciaux, mais jusqu'à, présent les substances pro- posées ne se sont pas montrées suffisamment efficaces pour permet- tre, d'une manière durable, l'emploi d'un catalyseur de grande activité.
Par exemple, on a proposé d'épurer le mélange de gaz, immé- diatement avant catalyse, à l'aide de sodium ou d'une amide de sodium. Ces deux substances, à l'état liquide ou solide, laissent toutefois subsister de faibles quantités d'oxygène,, lesquelles influent de façon désavantageuse, et en un temps relativement court, sur l'activité du catalyseur.
On a d'autre part également proposé de dissoudre du sodium métallique dans l'ammoniaque liquide, à l'effet d'obtenir, par suite de l'état de fine division du sodium colloïdal dissous, une action améliorée. Ce moyen est outefois insuffi-
<Desc/Clms Page number 2>
sant, en ce sens que, l'opération s'effectuant nécessaire- ment à la température ordinaire, ou même en-dessous, la vi- tesse de la réaction est trop! peu élevée pour permettre la rétention de traces d'oxygène d'un ordre de grandeur de
0,00001% en volume.
On a constaté que la dissolution d'un métal alcalin ou alcalino-terreux, tel le sodium, dans l'amide fondue d'un alcali, et par exemple l'amide, de sodium, permet d'obtenir un agent d'épuration qui répond à toutes les conditions,
En pareil cas, non seulement le métal dissous sous forme colloïdale, mais également l'agent de dispersion agissent comme agents d'épuration, et il est en outre possible de faire passer le mélange'gazeux à des températures comprises entre 200 et 300 C, en augmentant par conséquent, de façon sensible, la capacité de réaction. Il s'en suit la possibili- té d'épurer le mélange gazeux tout en maintenant au cataly- seur son activité pendant une durée presque illimitée.
Avantageusement, le passage du mélange gazeux est ef- fectué sous pression, et l'on pourrait également faire passer séparément les gaz hydrogène et azote dans l'agent d'épura- tion avant leur mélange.
<Desc / Clms Page number 1>
"PROCESS FOR THE SYNTHETIC MANUFACTURING OF AMMONIA FROM ITS ELEMENTS"
When very active catalysts are used in the synthesis of ammonia, they are found to be extremely sensitive to the smallest traces of impurities, such as oxygen, water vapor and water. carbon monoxide, present in the gas mixture employed for the synthesis, and that, consequently, the duration of their existence is very limited.
Various attempts have been made to rid the gas mixture of these impurities, prior to catalysis, by the action of special scavenging agents, but so far the proposed substances have not been shown to be effective enough to achieve this. allow, in a sustainable manner, the use of a high activity catalyst.
For example, it has been proposed to purify the gas mixture, immediately before catalysis, with sodium or a sodium amide. These two substances, in the liquid or solid state, however leave small quantities of oxygen, which influence disadvantageously, and in a relatively short time, the activity of the catalyst.
On the other hand, it has also been proposed to dissolve metallic sodium in liquid ammonia, with the effect of obtaining, as a result of the state of fine division of the dissolved colloidal sodium, an improved action. However, this means is insufficient.
<Desc / Clms Page number 2>
in the sense that, since the operation is necessarily carried out at room temperature, or even below, the rate of the reaction is too high! low to allow the retention of traces of oxygen of an order of magnitude of
0.00001% by volume.
It has been found that the dissolution of an alkali or alkaline earth metal, such as sodium, in the molten amide of an alkali, and for example the amide, of sodium, makes it possible to obtain a purifying agent which meets all the conditions,
In such a case, not only the dissolved metal in colloidal form, but also the dispersing agent acts as scavenging agents, and it is furthermore possible to pass the gas mixture at temperatures between 200 and 300 ° C. thereby significantly increasing the reaction capacity. This results in the possibility of purifying the gas mixture while maintaining the activity of the catalyst for an almost unlimited period of time.
Advantageously, the passage of the gas mixture is carried out under pressure, and it is also possible to pass the hydrogen and nitrogen gases separately into the purifying agent before they are mixed.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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BE332036A true BE332036A (en) |
Family
ID=11026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE332036D BE332036A (en) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE332036A (en) |
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0
- BE BE332036D patent/BE332036A/fr unknown
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