DE547581C - Procedure for cleaning rubber milk - Google Patents
Procedure for cleaning rubber milkInfo
- Publication number
- DE547581C DE547581C DEP57537D DEP0057537D DE547581C DE 547581 C DE547581 C DE 547581C DE P57537 D DEP57537 D DE P57537D DE P0057537 D DEP0057537 D DE P0057537D DE 547581 C DE547581 C DE 547581C
- Authority
- DE
- Germany
- Prior art keywords
- procedure
- rubber milk
- cleaning rubber
- milk
- rubber
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/04—Purifying; Deproteinising
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Dairy Products (AREA)
Description
Verfahren zur Reinigung von Kautschukmilch In der Patentschrift q.6o 950 ist ein Verfahren beschrieben, wonach Kautschukmilch durch mehrmaliges Behandeln mit verdünnter Natronlauge bei erhöhter Temperatur, z. B. 5o°, während vieler Stunden, Aufrahmenlassen und Abheben des Serums, schließlich Entfernen der Abbauprodukte und der Natronlauge durch Dialyse gereinigt wird.Process for cleaning rubber milk In the patent q.6o 950 a process is described, according to which rubber milk by repeated treatment with dilute sodium hydroxide solution at elevated temperature, for. B. 5o °, for many hours, creaming and lifting the serum, finally removing the degradation products and the sodium hydroxide solution is purified by dialysis.
Es wurde nun gefunden, daß man, ohne daß Koagulation eintritt, den an sich bekannten Vorgang des Eiweißabbaues durch Lauge dadurch zu einem technisch rentablen gestalten kann, daß man ihn in einem Autoklaven bei Temperaturen über ioo° ausführt, sofern man dafür sorgt, daß in der Kautschukmilch genügend Ätzalkali vorhanden ist, um während des Verfahrens ein pH. größer als i2 sicherzustellen. Die Dauer des Abbaus wird hierbei gegenüber obigem Verfahren bei etwa gleicher Alkalikonzentration auf etwa die benötigte Alkalimenge auf %o bis reduziert. Ein weiterer Vorteil des Verfahrens ist darin zu sehen, daß zur vollständigen Zersetzung nur eine Operation erforderlich ist.It has now been found that, without coagulation occurring, the known process of protein degradation by lye thereby becoming a technical one can make it profitable that it can be in an autoclave at temperatures above 100%, provided that it is ensured that there is enough caustic alkali in the rubber milk is present to maintain a pH during the procedure. greater than i2. The duration of the degradation is here compared to the above method with approximately the same alkali concentration reduced to about the required amount of alkali to% o. Another benefit of the Procedure can be seen in the fact that only one operation for complete decomposition is required.
Die Abscheidung des Kautschuks kann durch eines der üblichen Koagulationsinittel erfolgen. Sie wird jedoch am zweckmäßigsten mit einem Zinksalz ausgeführt: denn die in diesem Falle feinflockige Form des Koagulats ermöglicht ein gutes Auswaschen. Es erübrigt sich also die Entfernung der Serumbestandteile und des Alkalis in einer besonderen Operation. (Dialyse usw.).The rubber can be deposited by one of the usual coagulants take place. However, it is most conveniently carried out with a zinc salt: because the fine flaky form of the coagulate in this case enables it to be washed out well. There is no need to remove the serum components and the alkali in one special operation. (Dialysis, etc.).
Beispiel Man versetzt frische oder konservierte oder konzentrierte Kautschukmilch mit so viel Kalilauge, daß die Alkalikonzentration 2 bis 3 °/9 (berechnet auf die Gesamtmasse) beträgt und erhitzt das Gemisch etwa 3 Stunden in einem Autoklaven auf i,4o bis i5o°. Nach dieser Zeit ist das Eiweiß vollkommen zersetzt. Man verdünnt stark und fällt mit einer Lösung von Zinksulfat (etwa i'/"Äquivalente pro Äquivalent Alkali). Das lockere Koagel wird mehrmals mit Wasser gewaschen, gekreppt und getrocknet. Der Kautschuk ist eiweißfrei und enthält je nach Ausführung des Verfahrens 2 bis 5 °,% Zn O. Man kann die Koagulation auch ohne Zusatz von Salzen bzw. chemischer Verbindung ausführen und evtl. vorher das Alkali durch Dialyse entfernen.Example Fresh or preserved or concentrated are added Rubber milk with so much potassium hydroxide that the alkali concentration is 2 to 3 ° / 9 (calculated on the total mass) and the mixture is heated in an autoclave for about 3 hours on i, 4o to i5o °. After this time, the protein is completely decomposed. One dilutes strong and falls with a solution of zinc sulfate (about i '/ "equivalents per equivalent Alkali). The loose clot is washed several times with water, creped and dried. The rubber is protein-free and contains 2 to, depending on the execution of the process 5 °,% Zn O. Coagulation can also be carried out without the addition of salts or chemical substances Establish connection and, if necessary, remove the alkali beforehand by dialysis.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP57537D DE547581C (en) | 1928-04-08 | 1928-04-08 | Procedure for cleaning rubber milk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP57537D DE547581C (en) | 1928-04-08 | 1928-04-08 | Procedure for cleaning rubber milk |
Publications (1)
Publication Number | Publication Date |
---|---|
DE547581C true DE547581C (en) | 1932-03-26 |
Family
ID=7388755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP57537D Expired DE547581C (en) | 1928-04-08 | 1928-04-08 | Procedure for cleaning rubber milk |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE547581C (en) |
-
1928
- 1928-04-08 DE DEP57537D patent/DE547581C/en not_active Expired
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