CH244249A - Process for breaking down pectins. - Google Patents
Process for breaking down pectins.Info
- Publication number
- CH244249A CH244249A CH244249DA CH244249A CH 244249 A CH244249 A CH 244249A CH 244249D A CH244249D A CH 244249DA CH 244249 A CH244249 A CH 244249A
- Authority
- CH
- Switzerland
- Prior art keywords
- pectins
- hydrogen peroxide
- breaking down
- degradation
- degrading effect
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0045—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid alpha-D-Galacturonans, e.g. methyl ester of (alpha-1,4)-linked D-galacturonic acid units, i.e. pectin, or hydrolysis product of methyl ester of alpha-1,4-linked D-galacturonic acid units, i.e. pectinic acid; Derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
Verfahren zum Abbau von Pektinen. Vorliegende Erfindung betrifft ein Ver fahren zum Abbau von Pektinen.
Es hat sich gezeigt, dass der irreversible, ogydative Abbau von Pektinen nicht nur durch Endiole wie z. B. Ascorbinsäure, wie im Hauptpatent angegeben, sondern auch durch andere Verbindungen bewirkt werden kann. Die beim Abbau anfallenden Endstoffe sind in beiden Fällen die gleichen. Es ent stehen Verbindungen mit niedrigeren Mole kulargewichten als der Ausgangsstoff.
Die typischen Eigenschaften de Endstoffes sind deshalb auch die gleichen beim vorliegenden Verfahren wie beim Verfahren nach dem Hauptpatent durch Abbau mit Hilfe von Endiolen. Auch beim vorliegenden Verfahren werden die wässrigen Pektinlösungen weniger viskos und leichter filtrierbar.
Schon beim. Verfahren nach dem Haupt patent hat sich als besonders geeignet für den Abbau ein Zusatz von Wasserstoffperoxyd erwiesen, da es die abbauende Wirkung der Ascorbinsäure stark erhöht und beschleunigt. Es wurde nun gefunden, dass schon beim alleinigen Zusatz von geringen Mengen Was serstoffperoxyd zur wässrigen Polysaccharid- lösung bei Zimmertemperatur in gewissem Umfange bereits ein irreversibler,
ogydativer Abbau der hochpolymeren Polysaccharide er folgt, der viskosimetrisch am leichtesten fest stellbar ist. Wahrscheinlich :spielen hierbei geringe Verunreinigungen in der Lösung eine Rolle, indem sie eine Aktivierung des Wasser- sfoffperogyds verursachen. Ähnlich wie beim. Zusatz von Ascorbinsäure kann nun auch die abbauende Wirkung des:
W asserstoffperogyds durch Zusatz von geringen Mengen Redog- regulatoren wie Perrosalz, oder durch Tem peraturerhöhung über 50 C bedeutend ge steigert werden.
<I>Beispiel:</I> Eine 0,25@%ige Pektinlösung wird bei Zimmertemperatur mit 0,09 g Wasserstoff peroxyd und 0,04 g Ferrosulfat pro Liter abgebaut. Die spezifische Viskosität der Lö sung, in Prozent der stabilen Pektinlösung ohne Zusatz von Wasserstoffperoxyd und F'errosulfat, sinkt innerhalb fünf Minuten auf 50 %, in einer Stunde auf 15 % und be- trägt nach vier Stunden nur noch 3 % des Ausgangswertes.
Die anfangs hochviskose Lösung hat also praktisch die Viskosität reinen Wassers angenommen. Mit Alkohol tritt jetzt keine gelatinöse Fällung mehr ein.
Process for breaking down pectins. The present invention relates to a method for breaking down pectins.
It has been shown that the irreversible, ogydative degradation of pectins is not only caused by endiols such as z. B. ascorbic acid, as indicated in the main patent, but can also be effected by other compounds. The end products produced during the breakdown are the same in both cases. There are compounds with lower molecular weights than the starting material.
The typical properties of the end product are therefore also the same in the present process as in the process according to the main patent by degradation with the aid of endiols. In the present process, too, the aqueous pectin solutions become less viscous and easier to filter.
Already at. The process according to the main patent has proven to be particularly suitable for the degradation of an addition of hydrogen peroxide, as it greatly increases and accelerates the degrading effect of ascorbic acid. It has now been found that even the mere addition of small amounts of hydrogen peroxide to the aqueous polysaccharide solution at room temperature already leads to an irreversible,
ogydative degradation of the high-polymer polysaccharides it follows, which is viscometrically the easiest to determine. Probably: minor impurities in the solution play a role here by activating the hydrogen peroxide. Similar to the. The addition of ascorbic acid can now also reduce the degrading effect of:
Hydrogen perogyds can be increased significantly by adding small amounts of redog regulators such as Perrosalt, or by increasing the temperature above 50 C.
<I> Example: </I> A 0.25% pectin solution is broken down at room temperature with 0.09 g hydrogen peroxide and 0.04 g ferrous sulfate per liter. The specific viscosity of the solution, as a percentage of the stable pectin solution without the addition of hydrogen peroxide and ferrous sulfate, falls to 50% within five minutes, to 15% in one hour and is only 3% of the initial value after four hours.
The initially highly viscous solution has practically assumed the viscosity of pure water. Gelatinous precipitation no longer occurs with alcohol.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH237377T | 1944-12-12 | ||
CH244249T | 1944-12-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH244249A true CH244249A (en) | 1946-08-31 |
Family
ID=25728251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH244249D CH244249A (en) | 1944-12-12 | 1944-12-12 | Process for breaking down pectins. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH244249A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2545101A1 (en) * | 1983-04-29 | 1984-11-02 | Agronomique Inst Nat Rech | PROCESS FOR MODIFICATION OF BEET PECTINS, PRODUCTS OBTAINED AND THEIR APPLICATIONS |
EP1153933A1 (en) * | 2000-05-12 | 2001-11-14 | Seiko Epson Corporation | Process for the manufacture of polyuronic acids |
-
1944
- 1944-12-12 CH CH244249D patent/CH244249A/en unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2545101A1 (en) * | 1983-04-29 | 1984-11-02 | Agronomique Inst Nat Rech | PROCESS FOR MODIFICATION OF BEET PECTINS, PRODUCTS OBTAINED AND THEIR APPLICATIONS |
EP0124439A2 (en) * | 1983-04-29 | 1984-11-07 | Institut National De La Recherche Agronomique | Process for the modification of pectins from sugar beets, products obtained and their use |
EP0124439A3 (en) * | 1983-04-29 | 1984-12-12 | Institut National De La Recherche Agronomique | Process for the modification of pectins from sugar beets, products obtained and their use |
EP1153933A1 (en) * | 2000-05-12 | 2001-11-14 | Seiko Epson Corporation | Process for the manufacture of polyuronic acids |
US6903209B2 (en) | 2000-05-12 | 2005-06-07 | Seiko Epson Corporation | Process for the manufacture of polyuronic acids |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE879834C (en) | Process for the production of finely divided silica and silicates with high surface activity | |
DE1913142A1 (en) | Titanium alloy | |
CH244249A (en) | Process for breaking down pectins. | |
DE2133572C2 (en) | Process for the production of pectins with a methoxyl content of about 4.5 to 7% and a molecular weight of at least 120,000 | |
DE1558012A1 (en) | Process for reducing the losses in cube texture sheets made of iron-silicon alloys | |
DE834566C (en) | Process for the preparation of silica dispersions | |
DE521340C (en) | Process for the preparation of polyglucosans | |
DE926008C (en) | Process for the production of phosphate fertilizers by thermal decomposition of rock phosphates with the addition of magnesium sulfate | |
DE636307C (en) | Process for the manufacture of a product consisting essentially of triformyl cellulose | |
AT96288B (en) | Process for the preparation of alkali borates. | |
AT41831B (en) | Process for the preparation of acid esters from cellulose or related conversion products. | |
CH575762A5 (en) | Rapid-acting oil-in-water disinfectant compsn - is operative at mild pH values | |
AT39443B (en) | Process for the preparation of the bromoisovaleric acid esters of borneol and isoborneol. | |
AT37836B (en) | Process for solubilizing insoluble gums, algae, lichens and the like s. w. | |
DE851193C (en) | Process for the production of foaming oils for flotation purposes from raw sulphate pentinoel | |
DE510425C (en) | Process for the preparation of highly viscous acetyl cellulose which is soluble in acetone | |
DE892271C (en) | Process for the extensive removal of the mineral components from pectin extract | |
AT107836B (en) | Process for the production of white enamels. | |
DE659769C (en) | Process for the preparation of highly viscous acetyl cellulose soluble in acetone | |
AT149192B (en) | Process for the manufacture of glasses with high permeability to ultraviolet rays. | |
AT32635B (en) | Process for the production of fermentable sugar from starchy or cellulosic materials. | |
AT249005B (en) | Process for stabilizing at least 30% by weight, preferably ammonium nitrate-containing hydrogen peroxide | |
AT272266B (en) | Process for the preparation of a low-silica sodium fluoride | |
DE531276C (en) | Process for the production of esters of carbohydrates, in particular cellulose, with organic acids | |
DE862002C (en) | Process for the production of low sulfur barium carbonate |