DE133458C - - Google Patents
Info
- Publication number
- DE133458C DE133458C DENDAT133458D DE133458DA DE133458C DE 133458 C DE133458 C DE 133458C DE NDAT133458 D DENDAT133458 D DE NDAT133458D DE 133458D A DE133458D A DE 133458DA DE 133458 C DE133458 C DE 133458C
- Authority
- DE
- Germany
- Prior art keywords
- acid
- ellagic acid
- water
- residue
- raw materials
- 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
- AFSDNFLWKVMVRB-UHFFFAOYSA-N Ellagic acid Chemical compound OC1=C(O)C(OC2=O)=C3C4=C2C=C(O)C(O)=C4OC(=O)C3=C1 AFSDNFLWKVMVRB-UHFFFAOYSA-N 0.000 claims description 27
- 229960002852 Ellagic Acid Drugs 0.000 claims description 13
- 229920002079 Ellagic acid Polymers 0.000 claims description 13
- 235000004132 ellagic acid Nutrition 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- VXMKYRQZQXVKGB-CWWHNZPOSA-N Tannin Chemical compound O([C@H]1[C@H]([C@@H]2OC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)O[C@H]([C@H]2O)O1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 VXMKYRQZQXVKGB-CWWHNZPOSA-N 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 2
- 150000003863 ammonium salts Chemical class 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 229920001864 tannin Polymers 0.000 claims description 2
- 235000018553 tannin Nutrition 0.000 claims description 2
- 239000001648 tannin Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000014145 Caesalpinia bonduc Nutrition 0.000 description 2
- 235000009133 Caesalpinia coriaria Nutrition 0.000 description 2
- 235000005082 Caesalpinia paraguariensis Nutrition 0.000 description 2
- 241001618206 Libidibia coriaria Species 0.000 description 2
- 235000002566 Capsicum Nutrition 0.000 description 1
- 241000758706 Piperaceae Species 0.000 description 1
- 241001225886 Prosopis argentina Species 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D493/00—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
- C07D493/02—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
- C07D493/04—Ortho-condensed systems
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compounds Of Unknown Constitution (AREA)
Description
PATENTAMT.PATENT OFFICE.
Ja 133458 KLASSE \2q. Yes 133458 CLASS \ 2q.
Die Anwesenheit von Ellagsäure in Dividivi, Algarobilla und anderen gerbstoffhaltigen Materialien ist seit länger bekannt; die bisher benutzten Methoden zur Gewinnung der Säure aus diesen Rohstoffen sind aber äufserst mangelhaft und genügen nicht den Anforderungen, welche man an technische Verfahren zu stellen berechtigt ist. Nach Barth & Goldsctimiedt (Berichte Bd. ii, S. 846) sollen behufs Gewinnung der Ellagsäure aus Dividivi die zerkleinerten Schoten mit kaltem Weingeist digerirt werden etc. Für die Praxis sind aber Verfahren, nach denen die Ellagsäure den Rohstoffen mittels Alkohol entzogen werden soll, nicht anwendbar wegen der grofsen Schwerlöslichkeit der Säure in Alkohol. Cobenzl (Monatshefte für Chemie 1, 671) empfiehlt, die gepulverten Schoten einige Tage lang mit Wasser zu digeriren, die Lösung unter Zusatz von Schwefelsäure zum Syrup zu verdampfen und dann mit kochendem Wasser zu versetzen, wobei die Ellagsäure ausfällt. Abgesehen von anderen Mängeln, welche dieses Verfahren hat, ist dasselbe mit sehr erheblichen Verlusten verknüpft, da, wie gefunden wurde, die Ellagsäure in den sie enthaltenden Gerbstoffmaterialien nur zum Theil in freier, in Wasser löslicher Form vorhanden ist, während ein Theil in gebundener Form zugegen ist und sich in dieser Form nicht in Wasser löst. Das unlösliche Ellagsäurederivat wird durch Erhitzen mit verdünnter Schwefelsäure aufgespalten, unter Bildung von freier Ellagsäure, welche nach der Filtration dem Rückstande entzogen werden kann. Die Wahrnehmung, dafs in den Ellagsäure enthaltenden Gerbstoffmaterialien ein Theil der Säure in wasserunlöslicher, durch verdünnte Säuren aufspaltbarer Form vorhanden ist, ist neu und für die technische Darstellung der Säure sehr wesentlich, da sie eine erheblich gröfsere Ausbeute an Ellagsäure aus dem Rohstoff sichert, als bisher erzielt wurde.The presence of ellagic acid in Dividivi, Algarobilla and other materials containing tannin has been known for a long time; the methods used so far to obtain the acid from these raw materials are extremely inadequate and do not meet the requirements that are placed on technical processes is justified. According to Barth & Goldsctimiedt (reports, vol. Ii, p. 846), for the purpose of extraction of the ellagic acid from Dividivi, the crushed pods are digested with cold alcohol be etc. For practice, however, are procedures according to which the ellagic acid is the raw materials is to be removed by means of alcohol, not applicable because of the great poor solubility the acid in alcohol. Cobenzl (MONTHS FOR CHEMISTRY 1, 671) recommends that to digest powdered pods with water for a few days, adding the solution to evaporate from sulfuric acid to syrup and then to add boiling water, whereby the ellagic acid precipitates. Apart from other shortcomings this one Procedure, the same is associated with very substantial losses, since as found the ellagic acid in the tanning materials it contains only partly in free, in a water-soluble form, while a part is in a bound form and does not dissolve in water in this form. The insoluble ellagic acid derivative is split by heating with dilute sulfuric acid, with the formation of free ellagic acid, which can be removed from the residue after filtration. The perception, that in the tanning materials containing ellagic acid a part of the acid is present water-insoluble form that can be split up by dilute acids is new and very essential for the technical preparation of the acid, since it has a considerably greater yield of ellagic acid from the raw material than has previously been achieved.
Das Verfahren der Ellagsäuregewinnung, welches den Gegenstand der vorliegenden Erfindung bildet, gestaltet sich hiernach wie folgt: Nachdem man die die Säure enthaltenden Rohstoffe zunächst mit siedendem Wasser extrahirt hat, erhitzt man den Extraktionsrückstand mit verdünnter Schwefelsäure, worauf man filtrirt und dem jetzt freie Ellagsäure enthaltenden Rückstande letztere entzieht. Dies geschieht beispielsweise in der Weise, dafs man den aus 60 kg Rohstoff, wie Dividivischoten, erhaltenen Rückstand nach dem Entfernen der Schwefelsäure mit einer Lösung von etwa 16 kg Aetznatron in 300 1 Wasser kocht, filtrirt, mit heifsem Wasser auswäscht, das Natronsalz durch Zusatz von 15 bis 20 kg Salmiak in das unlösliche Ammonsalz umwandelt, dieses mit Wasser wäscht und dann daraus mittels Mineralsäure die freie Ellagsäure abscheidet.The process of recovery of ellagic acid, which is the subject of the present invention forms, is structured as follows: After the raw materials containing the acid has first extracted with boiling water, the extraction residue is heated with it diluted sulfuric acid, whereupon it is filtered and the now free ellagic acid is contained The latter withdraws residues. This is done, for example, in such a way that the 60 kg of raw material, such as Dividiva peppers, obtained residue after removing the sulfuric acid boiled with a solution of about 16 kg of caustic soda in 300 l of water, filtered, with Wash out the sodium salt in hot water by adding 15 to 20 kg of ammonia to the insoluble Converts ammonium salt, washes it with water and then separates the free ellagic acid from it using mineral acid.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE133458C true DE133458C (en) |
Family
ID=401659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT133458D Active DE133458C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE133458C (en) |
-
0
- DE DENDAT133458D patent/DE133458C/de active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2053022A1 (en) | Process for the extraction of phosphates, yttrium and rare earths from a solid material | |
DE133458C (en) | ||
DE2055292C3 (en) | Process for fractionating lignosulfonic acids | |
DE3729471C2 (en) | ||
DE3010755A1 (en) | PRODUCTION OF MAGNESIUM CHLORIDE | |
DE394680C (en) | Process for the treatment of the waste liquors which originate from the caustic soda digestion and the subsequent washing processes of the various vegetables | |
DE209418C (en) | ||
DE691366C (en) | Process for the production of potash salts from solutions | |
DE264005C (en) | ||
DE851194C (en) | Process for the production of monomeric ªŠ-caprolactam | |
DE204568C (en) | ||
DE499589C (en) | Process for converting insoluble condensation products of urea or its derivatives and formaldehyde back into soluble form | |
DE496446C (en) | Process for the production of salts and esters of the saponin contained in Primula species | |
DE137033C (en) | ||
DE263394C (en) | ||
DE963330C (en) | Process for the production of pure pimelic acid | |
DE3335871A1 (en) | METHOD FOR ACID HYDROLYSIS OF POLYSACCHARIDE-CONTAINING SUBSTANCES | |
DE257286C (en) | ||
DE421216C (en) | Process for the preparation of glycerophosphates | |
DE857347C (en) | Process for the conversion of potassium salts of highly nitrated secondary aromatic amines with mineral acids | |
DE129165C (en) | ||
DE252874C (en) | ||
DE694152C (en) | Process for separating thorium from thorium in addition to iron-containing substances, in particular from | |
DE409035C (en) | Process for dissolving leather, leather waste or the like. | |
DE964409C (en) | Process for the production of potassium salts from lyes, in particular from final lyes in the potash industry |