CH93273A - Process for the preparation of acetaldehyde. - Google Patents
Process for the preparation of acetaldehyde.Info
- Publication number
- CH93273A CH93273A CH93273DA CH93273A CH 93273 A CH93273 A CH 93273A CH 93273D A CH93273D A CH 93273DA CH 93273 A CH93273 A CH 93273A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- preparation
- acetaldehyde
- elevated temperature
- acetylene
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 4
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 title description 4
- 239000003054 catalyst Substances 0.000 claims description 8
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 3
- 239000002574 poison Substances 0.000 claims description 3
- 231100000614 poison Toxicity 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100045711 Aspergillus terreus (strain NIH 2624 / FGSC A1156) terI gene Proteins 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Landscapes
- Catalysts (AREA)
Description
Verfahren zur Darstellung von teetaldeliyd. Bei dem Verfahren zur @ceta@dehvddar- stellung aus Azetylen und -#Ajasserdampi' bei Gegenwart von Oxyden als Katalysatoren hat es sich gezeigt, dass trotz sorgfältiger Fernhaltung von Kataly satorgiften bei län gerem Betrieb ein 'Nachlassen der Wirklain- keit des Katalysator. eintritt.
Das nähere Studium dieser Erscheinung hat gezeigt. dA die Ursachen für dieses Nachlassen sowohl physikalische wie chemische sein können. Als physikalische Ursache in diesem Sinne wird die Abscheidung von Kohlenstoff auf dent Katalyt, auch wenn sie nur geringfügig ist. angeleben, lind als chemische Ursache eine teilweise Reduktion höherer Oxyde zu nie- dern Oxydationsstufen.
In beiden Fürlleii kann. selbstredend immer bei strengster Fern haltung von Katalysatorgiften. dein Kataly 1 seine ursprüngliche Wirksamkeit wieder gegeben werden, wenn man bei erhöhter Tem peratur einen Luftstrom durch (las Reaktions gefäss leitet.
Dadurch wird entweder abge schiedener Kohlenstoff verbrannt oder e wird das teilweise in niedere Oxydations-
EMI0001.0034
stufen <SEP> übergeführte <SEP> Metalloxyd <SEP> wieder <SEP> in
<tb> das <SEP> von <SEP> haus <SEP> sauhöhere <SEP> Oxyd <SEP> zuriicl@ver wandelt. <SEP> Wie <SEP> schon <SEP> besagt, <SEP> haben <SEP> die <SEP> auf
<tb> diese <SEP> Weise <SEP> re-enerierten <SEP> Katalysatoren
<tb> n:icli <SEP> erfolgter <SEP> l3eh@i.ndliin" <SEP> ihre <SEP> ursprüng liche <SEP> Wirl;la.nikeit <SEP> wieder <SEP> erlangt, <SEP> und <SEP> es <SEP> ist,
<tb> damit <SEP> die <SEP> Möglichkeit <SEP> gegeben. <SEP> mit <SEP> geringen
<tb> Mengün <SEP> Metalloxyd <SEP> grosse <SEP> Mengen <SEP> von <SEP> Aze tv@en <SEP> in <SEP> _@cetaldchvd <SEP> über-rnführcri.
<tb>
<I>re-1st@iel:</I>
<tb> Durch <SEP> ein <SEP> in <SEP> eirein <SEP> geeigneten <SEP> Ofen <SEP> auf
<tb> zirka <SEP> <B>()CM</B> <SEP> " <SEP> erhitztes <SEP> Rohr <SEP> mit <SEP> einer <SEP> 35 <SEP> cm.
<tb> langen <SEP> Sebieht <SEP> eines <SEP> etwa, <SEP> 33 <SEP> \igen <SEP> 31o1377) wird <SEP> ein. <SEP> Geniiseh <SEP> von <SEP> -100 <SEP> Li terI>ampf <SEP> imil <SEP> 1a <SEP> Liter <SEP> voii-#7erunreinignn gen <SEP> sorpFÜltig <SEP> befreitem <SEP> Azetylen <SEP> so <SEP> durch ,eleitet, <SEP> <B>d. <SEP> '111</B> <SEP> p<B>1.0</B> <SEP> cri" <SEP> Querschnitt <SEP> in <SEP> der <SEP> Minute
<tb> etwa <SEP> 1 <SEP> Liter <SEP> passiert. <SEP> Die <SEP> Ausbeute <SEP> an <SEP> Aeetal deby <SEP> d <SEP> beträgt <SEP> zirka. <SEP> 17 <SEP> ä.
<SEP> Bei <SEP> Wiederholung
<tb> des <SEP> @'ersuclies <SEP> unter <SEP> völlig <SEP> gleichen <SEP> Umstän den <SEP> sinkt <SEP> die <SEP> Ausbeute <SEP> auf <SEP> 12 <SEP> ö. <SEP> bei <SEP> aber maliger <SEP> -\Viederholung <SEP> auf <SEP> 8 <SEP> l0 <SEP> usw. <SEP> Nacli
<tb> I'lierleiten <SEP> von <SEP> Inift <SEP> bei <SEP> höherer <SEP> Temperatur
<tb> steigt <SEP> die <SEP> Anbente <SEP> wieder <SEP> auf <SEP> 17 <SEP> ö, <SEP> und <SEP> es können also auf diese Weise eine vollständi;-e Regeneration erzielt und mit einer gegebe nen @Tenge Katalysator unbegrenzte l@ren- gen Acetaldehy(l dargestellt werden.
Process for the representation of teetaldeliyd. In the process of @ ceta @ dehvdrepresentation from acetylene and - # Ajasserdampi 'in the presence of oxides as catalysts, it has been shown that, despite careful keeping away from catalyst poisons, a' decrease in the efficiency of the catalyst during prolonged operation. entry.
Closer study of this phenomenon has shown. that the causes of this decline can be both physical and chemical. The physical cause in this sense is the deposition of carbon on the catalytic converter, even if it is only slight. live, and the chemical cause is a partial reduction of higher oxides to lower oxidation levels.
In both cases you can. of course, always with the strictest avoidance of catalyst poisons. Your Kataly 1 can be restored to its original effectiveness if a stream of air is passed through the reaction vessel at a higher temperature.
As a result, either deposited carbon is burned or it is partially converted into lower oxidation
EMI0001.0034
stages <SEP> transferred <SEP> metal oxide <SEP> again into <SEP>
<tb> the <SEP> from <SEP> house <SEP> very high <SEP> Oxyd <SEP> is transformed back. <SEP> As <SEP> says <SEP>, <SEP> have <SEP> the <SEP> on
<tb> this <SEP> way <SEP> re-energized <SEP> catalysts
<tb> n: icli <SEP> completed <SEP> l3eh@i.ndliin "<SEP> your <SEP> original <SEP> Wirl; la.nikeit <SEP> regained <SEP>, <SEP> and < SEP> it is <SEP>,
<tb> with <SEP> the <SEP> option <SEP> is given. <SEP> with <SEP> low
<tb> Mengün <SEP> metal oxide <SEP> large <SEP> amounts <SEP> of <SEP> Aze tv @ en <SEP> in <SEP> _ @ cetaldchvd <SEP> over-rnführcri.
<tb>
<I> re-1st @iel: </I>
<tb> With <SEP> a <SEP> in <SEP> a <SEP> suitable <SEP> furnace <SEP> on
<tb> about <SEP> <B> () CM </B> <SEP> "<SEP> heated <SEP> pipe <SEP> with <SEP> a <SEP> 35 <SEP> cm.
<tb> long <SEP> See <SEP> of a <SEP> for example, <SEP> 33 <SEP> \ igen <SEP> 31o1377) becomes <SEP>. <SEP> Geniiseh <SEP> from <SEP> -100 <SEP> Li terI> ampf <SEP> imil <SEP> 1a <SEP> liter <SEP> completely contaminated <SEP> thoroughly <SEP> freed <SEP > Acetylene <SEP> so <SEP> through, conducts, <SEP> <B> d. <SEP> '111 </B> <SEP> p <B> 1.0 </B> <SEP> cri "<SEP> Cross section <SEP> in <SEP> of the <SEP> minute
<tb> about <SEP> 1 <SEP> liter <SEP> happens. <SEP> The <SEP> yield <SEP> of <SEP> Aeetal deby <SEP> d <SEP> is <SEP> approximately. <SEP> 17 <SEP> Ä.
<SEP> With <SEP> repetition
<tb> of the <SEP> @ 'ersuclies <SEP> under <SEP> completely <SEP> the same <SEP> circumstances <SEP> <SEP> the <SEP> yield <SEP> drops to <SEP> 12 <SEP> ö. <SEP> with <SEP> but repeated <SEP> - \ Repetition <SEP> on <SEP> 8 <SEP> l0 <SEP> etc. <SEP> Nacli
<tb> I lead <SEP> from <SEP> Inift <SEP> at <SEP> higher <SEP> temperature
<tb> increases <SEP> the <SEP> advisor <SEP> again <SEP> to <SEP> 17 <SEP> ö, <SEP> and <SEP> a complete regeneration can be achieved in this way and with a given tight catalyst unlimited long acetaldehyde (l can be represented.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE93273X | 1916-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH93273A true CH93273A (en) | 1922-02-16 |
Family
ID=5644573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH93273D CH93273A (en) | 1916-06-17 | 1917-05-24 | Process for the preparation of acetaldehyde. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH93273A (en) |
-
1917
- 1917-05-24 CH CH93273D patent/CH93273A/en unknown
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