CH88187A - Simultaneous manufacturing process of acetone and carbonic acid. - Google Patents
Simultaneous manufacturing process of acetone and carbonic acid.Info
- Publication number
- CH88187A CH88187A CH88187DA CH88187A CH 88187 A CH88187 A CH 88187A CH 88187D A CH88187D A CH 88187DA CH 88187 A CH88187 A CH 88187A
- Authority
- CH
- Switzerland
- Prior art keywords
- peroxide
- acetone
- carbonic acid
- process according
- manganese
- Prior art date
Links
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 title claims description 16
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 16
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 150000002978 peroxides Chemical class 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 2
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical compound [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 description 2
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- -1 manganese peroxides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Procédé de fabrication Simultanée d'acétone et d'acide carbonique. On connaît depuis longtemps la possi bilité de fabriquer de l'acétone par déconr- position catalytique de l'acide acétique en faisant passer cet acide sur un certain nombre de substances minérales, et en particulier sur l'oxyde manganeux (procédé Sabatier), mais les divers auteurs qui se sont occupés de la question, insistent sur la nécessité d'employer un oxyde manganeux pur très pulvérulent, préparé de façon spéciale,
dont l'altérabilité. est très grande et qui ne travaille bien que dans un intervalle restreint de température. Quand on passe à la réalisation industrielle de ces procédés, le pouvoir catalytique de la masse tombe eu général très rapidement.
Selon le procédé qui fait l'objet de la présente invention, on fait passer des vapeurs d'acide acétique à une température de 350 à 450 C au contact de peroxyde de man- ganèse. Il se produit ainsi des vapeurs d'acé tone et de l'acide carbonique.
Le peroxyde de manganèse est enipluyé de préférence à l'état de peroxyde naturel simplement concassé en petits morceaux; la pyrolusite, en particulier, permet de catalyser la décomposition de l'acide acétique sans réactions secondaires, et d'obtenir un rende ment égal au rendement théorique. Le pou voir catalytique se conserve presque indéfini ment si l'on prend le soin de chauffer de temps en temps le peroxyde de manganèse dans un courant d'air qui oxyde et entraîne les impuretés qui tendraient à encrasser la masse.
Le peroxyde de manganèse précipité peut aussi être employé avec succès.
L'utilisation des peroxydes de manganèse a l'avantage de ne pas nécessiter l'emploi d'acide acétique cristallisable (l'acide à<B>90</B> suffit parfaitement), de laisser une grande marge entre les températures maximum et minimum qu'il convient de ne pas dépasser et de réduire l'influence nuisible des irrégu- larités inévitables de chauffage.
On peut mettre le procédé cri application par exemple cri faisant passer les vapeurs d'acide acétique à travers turc colonne<B>(le</B> pyrolusite concassée chauffée extérieurement par tout moyen approprié.
A la sortie de la colonne les produits de réaction sont de pré férence soumis à la condensation à la tempé rature ordinaire: environ 80 0'o de l'acétone produite se condensent ainsi; l'acide carbo nique entraînant le restant des vapeurs d'acé tone est alors acantageuseinent lavé dans des tours arrosées d eau, et grâce à une circula tion méthodique de l'eau de lavage on peut récupérer la presque totalité des vapeurs d'acétone, sous une forme directement recti- fiable. L'acide carbonique produit peut être employé tel quel à tous ses usages habituels.
.lu lieu de pyrolusite seule, on peut em ployer un mélange de coke et de pyrolusite concassés et bien tamisés. Le chauffage peut être obtenu au moyen d'un courant électrique qui traverse ce mélange.
Simultaneous manufacturing process of acetone and carbonic acid. The possibility of producing acetone by catalytic decomposition of acetic acid by passing this acid over a certain number of mineral substances, and in particular over manganous oxide (Sabatier process), has long been known. the various authors who have dealt with the question insist on the need to use a very pulverulent pure manganous oxide, prepared in a special way,
including alterability. is very large and works well only in a limited temperature range. When we move on to the industrial realization of these processes, the catalytic power of the mass generally falls very quickly.
According to the process which is the subject of the present invention, acetic acid vapors are passed at a temperature of 350 to 450 ° C. in contact with manganese peroxide. Acetone vapors and carbonic acid are thus produced.
The manganese peroxide is preferably enipluyé in the state of natural peroxide simply crushed into small pieces; pyrolusite, in particular, makes it possible to catalyze the decomposition of acetic acid without side reactions, and to obtain a yield equal to the theoretical yield. The catalytic louse is preserved almost indefinitely if care is taken to heat the manganese peroxide from time to time in a current of air which oxidizes and entrains the impurities which would tend to clog the mass.
Precipitated manganese peroxide can also be used successfully.
The use of manganese peroxides has the advantage of not requiring the use of crystallizable acetic acid (<B> 90 </B> acid is perfectly sufficient), of leaving a large margin between the maximum temperatures and minimum which should not be exceeded and the harmful influence of inevitable heating irregularities reduced.
The method can be applied, for example, by passing the vapors of acetic acid through a Turkish column <B> (the </B> crushed pyrolusite heated externally by any suitable means.
On leaving the column, the reaction products are preferably subjected to condensation at room temperature: about 80% of the acetone produced thus condenses; the carbonic acid entraining the rest of the acetone vapors is then washed in towers sprayed with water, and thanks to a methodical circulation of the washing water, almost all the acetone vapors can be recovered, in a directly correctable form. The carbonic acid produced can be used as is for all of its usual uses.
Instead of pyrolusite alone, a mixture of crushed and well-sieved coke and pyrolusite can be used. Heating can be obtained by means of an electric current flowing through this mixture.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR88187X | 1918-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH88187A true CH88187A (en) | 1921-02-16 |
Family
ID=8768663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH88187D CH88187A (en) | 1918-11-16 | 1919-11-13 | Simultaneous manufacturing process of acetone and carbonic acid. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH88187A (en) |
-
1919
- 1919-11-13 CH CH88187D patent/CH88187A/en unknown
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