DE29669C - Process for the preparation of organic acid anhydrides - Google Patents
Process for the preparation of organic acid anhydridesInfo
- Publication number
- DE29669C DE29669C DENDAT29669D DE29669DA DE29669C DE 29669 C DE29669 C DE 29669C DE NDAT29669 D DENDAT29669 D DE NDAT29669D DE 29669D A DE29669D A DE 29669DA DE 29669 C DE29669 C DE 29669C
- Authority
- DE
- Germany
- Prior art keywords
- anhydride
- preparation
- temperature
- double boiler
- pure
- 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.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title claims description 3
- 150000007524 organic acids Chemical class 0.000 title 1
- 150000008064 anhydrides Chemical class 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- WFDIJRYMOXRFFG-UHFFFAOYSA-N acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 3
- 239000012043 crude product Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims 2
- 229910001018 Cast iron Inorganic materials 0.000 claims 1
- 210000004400 Mucous Membrane Anatomy 0.000 claims 1
- TZPRTRNABISURJ-UHFFFAOYSA-N [Cl].O=[C] Chemical compound [Cl].O=[C] TZPRTRNABISURJ-UHFFFAOYSA-N 0.000 claims 1
- DDKMFOUTRRODRE-UHFFFAOYSA-N chloromethanone Chemical compound Cl[C]=O DDKMFOUTRRODRE-UHFFFAOYSA-N 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 238000004821 distillation Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-N propionic acid Chemical compound CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 9
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid group Chemical group C(C1=CC=CC=C1)(=O)O WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- YGYAWVDWMABLBF-UHFFFAOYSA-N phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 3
- 235000019260 propionic acid Nutrition 0.000 description 3
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butanoic acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- WYVAMUWZEOHJOQ-UHFFFAOYSA-N Propionic anhydride Chemical compound CCC(=O)OC(=O)CC WYVAMUWZEOHJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- YHASWHZGWUONAO-UHFFFAOYSA-N butanoyl butanoate Chemical compound CCCC(=O)OC(=O)CCC YHASWHZGWUONAO-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000004508 fractional distillation Methods 0.000 description 2
- 239000005711 Benzoic acid Substances 0.000 description 1
- PASDCCFISLVPSO-UHFFFAOYSA-N Benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 0.000 description 1
- WXMKPNITSTVMEF-UHFFFAOYSA-M Sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- RZWZRACFZGVKFM-UHFFFAOYSA-N propanoyl chloride Chemical compound CCC(Cl)=O RZWZRACFZGVKFM-UHFFFAOYSA-N 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 235000010234 sodium benzoate Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/54—Preparation of carboxylic acid anhydrides
- C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Furan Compounds (AREA)
Description
2. Darstellung von Propionsäureanhydrid. Das Verfahren entspricht dem unter 1. beschriebenen, nur dafs das entwässerte propionsäure Natron auf 1700 erhitzt wird; das Destillat besteht in diesem Falle aus einem wechselnden Gemenge von Propionsäureanhydrid- und -Chlorid, welche durch fractionirte Destillation getrennt werden; das Chlorid ist offenbar infolge secundärer Umsetzung des Anhydrids mit Phosgen entstanden, C 1^ 2. Preparation of propionic anhydride. The method corresponds to that described under 1., only That the dewatered propionic acid soda is heated at 170 0; the distillate in this case consists of an alternating mixture of propionic anhydride and chloride, which are separated by fractional distillation; the chloride was evidently formed as a result of the secondary reaction of the anhydride with phosgene, C 1 ^
C3 C 3
+CO Ck =+ CO Ck =
2 C3 H1 CO Cl; es kann durch Kochen mit Propionsäure wieder in das Anhydrid verwandelt werden. 2 C 3 H 1 CO Cl; it can be converted back into the anhydride by boiling with propionic acid.
3. Die Darstellung von Buttersäureanhydrid erfolgt wie die des Essigsäureanhydrids bei einer Temperatur von 2000 C; auch hierbei tritt ein Gemenge von Anhydrid und Chlorid auf, welche leicht durch fractionirte Destillation getrennt werden konnten; beim Destilliren über buttersaures Natron liefert das Rohproduct chloridfreies Buttersäureanhydrid.3. Like that of acetic anhydride, butyric anhydride is prepared at a temperature of 200 ° C .; Here too a mixture of anhydride and chloride occurs, which could easily be separated by fractional distillation; when distilled over butyric soda, the crude product yields chloride-free butyric anhydride.
4. Ebenso gelingt die Darstellung von Benzoesäureanhydrid im Gemenge· mit Benzoylchlorid beim Ueberleiten von Phosgen über benzoesaures Natron, welches auf 3600 erhitzt wird. Beim Destilliren geht der gröfsere Theil des Rohproductes bei 1980 über, der kleinere bei 3600 C; das erste Product bleibt flüssig und erweist sich als Benzoylchlorid, das letztere erstarrt zu einer bei 400 schmelzenden, krystallinischen Masse, zu Benzoesäureanhydrid.4. Likewise, the presentation of benzoic in the batch · with benzoyl succeeds in passing over phosgene over benzoate of soda, which is heated to 360 0th When distilled the greater part of the proceeds Rohproductes at 198 0, the smaller at 360 0 C; the first product remains liquid and proves to be benzoyl chloride, the latter solidifies to a 40 0-melting, crystalline mass of benzoic.
Paten τ-An spruch:Sponsorship τ claim:
Die Darstellung der Anhydride, der Essigsäure, Propionsäure, Buttersäure und Benzoesäure bezw. eines Gemenges dieser Anhydride mit den entsprechenden Chloriden durch Einwirkung von Phosgen auf die entwässerten Salze der betreffenden Säuren, welche auf eine den Siedepunkt der betreffenden Anhydride wenig übersteigende Temperatur erhitzt sind.The representation of the anhydrides, acetic acid, propionic acid, butyric acid and benzoic acid respectively a mixture of these anhydrides with the corresponding chlorides by action of phosgene on the dehydrated salts of the acids in question, which on one of the Boiling point of the anhydrides in question are heated a little higher than the temperature.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE29669C true DE29669C (en) |
Family
ID=305833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT29669D Active DE29669C (en) | Process for the preparation of organic acid anhydrides |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE29669C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3282941A (en) * | 1962-12-05 | 1966-11-01 | Du Pont | Chloro-quinoxaline-dicarboxylic anhydrides |
-
0
- DE DENDAT29669D patent/DE29669C/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3282941A (en) * | 1962-12-05 | 1966-11-01 | Du Pont | Chloro-quinoxaline-dicarboxylic anhydrides |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0632009B1 (en) | Process for the recuperation of fluorinated carboxylic acids | |
DE3128147A1 (en) | METHOD FOR PRODUCING AROMATIC MONOCARBONIC ACIDS | |
DE29669C (en) | Process for the preparation of organic acid anhydrides | |
DE68904760T2 (en) | REGENERATION OF EXHAUSTED SULFURIC ACIDS WITH HYDROGEN PEROXYD. | |
EP0296404B1 (en) | Method for the production of carboxylic acid halides with more than 7 carbon atoms | |
EP0741122A1 (en) | Process for preparing aromatic compounds through decarboxylation of aromatic carboxylic acids | |
EP0031504A1 (en) | Process for the preparation of carboxylic acid chlorides | |
DE69214937T2 (en) | METHOD FOR PRODUCING PURIFIED 2,6-NAPHTHALINE DICARBONIC ACIDS | |
DE157816C (en) | ||
DE17467C (en) | Innovations in the process for the preparation of room acid | |
DE2810975A1 (en) | glycolic acid prodn. by hydrolysis of mono:chloro-acetic acid - in (superheated) aq. soln. avoids pollution and contamination with salt | |
DE1668118C3 (en) | Process for the preparation of a mixture of mixed anhydrides of sorbic acid with palmitic acid or stearic acid and sodium or potassium chloride and its use as a preservative for bread and baked goods | |
DE2059597A1 (en) | Process for the production of carboxylic acid chlorides | |
NO131441B (en) | ||
DE171453C (en) | ||
DE69004974T2 (en) | Production of 2-chloroterephthalic acid chloride. | |
DE286872C (en) | ||
DE1081455B (en) | Process for the continuous production of trimeric aldoketenes in addition to other polymeric aldoketenes | |
DE2111723C3 (en) | Process for the production of methyl vinyl ketone | |
DE63593C (en) | Process for the preparation of acid anhydrides, acid chlorides and chlorinated acids of the fat series | |
EP0406714B1 (en) | Method for the production of carboxylic acid chlorides | |
DE290702C (en) | ||
DE621912C (en) | Process for the preparation of phthalyl chloride and its chlorine substitution products | |
DE2357816A1 (en) | PROCESS FOR THE PRODUCTION OF ALPHA, BETA-UNSATATULATED CARBONIC ACID CHLORIDES | |
DE849105C (en) | Process for the preparation of 1-acetoxy-1, 1-dicyanaethane |