AT72292B - Process for the preparation of acid chlorides using phosgene. - Google Patents
Process for the preparation of acid chlorides using phosgene.Info
- Publication number
- AT72292B AT72292B AT72292DA AT72292B AT 72292 B AT72292 B AT 72292B AT 72292D A AT72292D A AT 72292DA AT 72292 B AT72292 B AT 72292B
- Authority
- AT
- Austria
- Prior art keywords
- phosgene
- preparation
- acid chlorides
- acid
- desc
- Prior art date
Links
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 title claims description 6
- 239000002253 acid Substances 0.000 title claims description 6
- 150000001805 chlorine compounds Chemical class 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 2
- 235000005985 organic acids Nutrition 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 150000007513 acids Chemical class 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- UHZYTMXLRWXGPK-UHFFFAOYSA-N phosphorus pentachloride Chemical compound ClP(Cl)(Cl)(Cl)Cl UHZYTMXLRWXGPK-UHFFFAOYSA-N 0.000 description 1
- FAIAAWCVCHQXDN-UHFFFAOYSA-N phosphorus trichloride Chemical compound ClP(Cl)Cl FAIAAWCVCHQXDN-UHFFFAOYSA-N 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- YBBRCQOCSYXUOC-UHFFFAOYSA-N sulfuryl dichloride Chemical compound ClS(Cl)(=O)=O YBBRCQOCSYXUOC-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
<Desc/Clms Page number 1>
EMI1.1
Dass sich auch Phosgen zur Darstellung von Säurechloriden aus organischen Säuren und deren Salzen analog anderen, hier zu viel verwendeten Chloriden, z. B. Phosphortrichlorid, Phosphorpentachlorid, Sulfurylchlorid, verwenden lässt, ist bereits bekannt.
EMI1.2
Phosgen durch Erhitzen im zugeschmolzenen Rohr.
Beide Arbeitsmethoden sind technisch nicht brauchbar. Die erste, weil sie vorwiegend Anhydrid liefert, und die zweite, deren allgemeine Anwendbarkeit auf andere Säuren übrigens erst durch die vorliegende Erfindung dargetan worden ist, weil bei derselben pro Grammolekül Säurechlorid zwei Grammolekül Gas (etwa 45 1) entstehen, welches, sofern nicht der Druck im Autoklaven allzusehr steigen soll, allmählich abgelassen werden muss, wobei der Chlorwassorstoff die Ventito stark angreift und beträchtliche Mengen von Phosgen mitgerissen werden.
Nach der vorliegenden Erfindung lassen sich diese Schwierigkeiten wenigstens bei den destillierbaren Säuren in der einfachsten Weise dadurch umgehen, dass man den Dampf
EMI1.3
quantitative Ausbeute ethöht werden kann, wenn man die von den entweichenden Gasen mitgeführten Dämpfe durch Kälte oder auf sonstige Weise zurückhält.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
EMI1.1
That phosgene can also be used to prepare acid chlorides from organic acids and their salts analogously to other chlorides that are used too much here, e.g. B. phosphorus trichloride, phosphorus pentachloride, sulfuryl chloride, can be used, is already known.
EMI1.2
Phosgene by heating in the sealed tube.
Both working methods are technically unsuitable. The first, because it mainly supplies anhydride, and the second, the general applicability of which to other acids has only been demonstrated by the present invention, because it produces two gram molecules of gas (about 45 liters) per gram molecule of acid chloride, which, if not the If the pressure in the autoclave is supposed to rise too much, it has to be gradually drained, whereby the hydrogen chloride strongly attacks the Ventito and considerable amounts of phosgene are entrained.
According to the present invention, these difficulties can be avoided in the simplest way, at least in the case of the distillable acids, by using the steam
EMI1.3
quantitative yield can be increased if the vapors carried along by the escaping gases are retained by cold or in some other way.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT72292T | 1912-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT72292B true AT72292B (en) | 1916-08-25 |
Family
ID=3593958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT72292D AT72292B (en) | 1912-08-17 | 1912-08-17 | Process for the preparation of acid chlorides using phosgene. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT72292B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0028327A1 (en) * | 1979-10-26 | 1981-05-13 | Bayer Ag | Process for the preparation of carboxylic acid halides |
-
1912
- 1912-08-17 AT AT72292D patent/AT72292B/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0028327A1 (en) * | 1979-10-26 | 1981-05-13 | Bayer Ag | Process for the preparation of carboxylic acid halides |
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