DE174797C - - Google Patents
Info
- Publication number
- DE174797C DE174797C DENDAT174797D DE174797DA DE174797C DE 174797 C DE174797 C DE 174797C DE NDAT174797 D DENDAT174797 D DE NDAT174797D DE 174797D A DE174797D A DE 174797DA DE 174797 C DE174797 C DE 174797C
- Authority
- DE
- Germany
- Prior art keywords
- rubber
- phenol
- solution
- creosote
- devulcanization
- 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
- 229920001971 elastomer Polymers 0.000 claims description 18
- 239000005060 rubber Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 10
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 6
- 229960002126 Creosote Drugs 0.000 claims description 4
- 235000006173 Larrea tridentata Nutrition 0.000 claims description 4
- 240000007588 Larrea tridentata Species 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 229920000591 gum Polymers 0.000 description 2
- 230000002378 acidificating Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036545 exercise Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000001519 tissues Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2321/00—Characterised by the use of unspecified rubbers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
-JV* 174797 -KLASSE 396. GRUPPE - JV * 174797 - CLASS 396th GROUP
Versuche zur Regenerierung von gebrauchtem Gummi haben gezeigt, daß Verfahren, welche darauf beruhen, den Gummi aufzulösen, den Mangel haben, daß sie die Festigkeit des wiedergewonnenen Gummis wesentlich beeinträchtigen.Attempts to regenerate used rubber have shown that processes which rely on dissolving the rubber, lack the strength significantly affect the recovered rubber.
Zur Entvulkanisierung des Gummis und zur Zerstörung und Entfernung der Gewebefasern sind sowohl saure als auch alkalischeFor devulcanizing the rubber and destroying and removing the fabric fibers are both acidic and alkaline
ίο Lösungen und auch Oxykohlenwasserstoffe in Verbindung mit Alkalien angewendet worden. Die Erfahrung hat jedoch gezeigt, daß zur Erreichung der beabsichtigten Wirkung diese Lösungen auf so hohe Temperaturen gebracht werden mußten, daß ein Verbrennen oder Härten des wiederzugewinnenden Gummis eintrat, wodurch die Beschaffenheit und Verwendbarkeit des Erzeugnisses beeinträchtigt wurde.ίο solutions and also oxyhydrocarbons has been used in conjunction with alkalis. However, experience has shown that to achieve the intended effect these solutions at such high temperatures that had to be brought about burning or hardening of the rubber to be recovered occurred, which affects the quality and usability of the product became.
Es war daher bisher praktisch unmöglich, regenerierten Gummi zu verwenden, es sei denn, daß man eine gewisse Menge neuen Gummis zusetzte, der infolge seiner Beschaffenheit geeignet war, die Mischung zu erweichen, um die Bildung von Klumpen oder Blasen während des Mahlvorganges zu verhindern. Wie festgestellt ist, zerstören die Alkalien bei den für die Entvulkanisierung erforderlichen hohen Temperaturen das in dem Gummi enthaltene Kautschuköl. Mittels des vorliegenden Verfahrens soll nun die Entvulkanisierung bewirkt werden, ohne daß das erwähnte Öl in der Masse des behandelten Gummis angegriffen wird, so daß auf diese Weise die den anderen Verfahren anhaftenden Mängel beseitigt werden.It has therefore heretofore been practically impossible to use regenerated rubber unless it is because that a certain amount of new rubber was added, because of its nature was designed to soften the mixture to prevent the formation of lumps or to prevent bubbles during the grinding process. As has been established, the destroy Alkalis at the high temperatures required for devulcanization rubber oil contained in the rubber. By means of the present procedure, the Devulcanization can be effected without the mentioned oil in the bulk of the treated Rubber is attacked, so that in this way sticking to the other processes Defects are eliminated.
Das Verfahren ändert sich mit den Sorten und der Beschaffenheit des Gummiabfalls, besteht im wesentlichen aber im folgenden: Nachdem die beigemengten Gewebefasern auf irgend eine bekannte Art und Weise zerstört sind, wird die trockne Gummimasse zusammen mit einer verdünnten wässerigen Lösung von Phenol oder Kreosot in eine Arbeitskammer gegeben. Beispielsweise kann eine 1 bis ioprozentige Phenollösung verwendet werden. Diese Lösung muß genügend schwach sein, daß sie keine lösende Wirkung auf den Gummi ausübt; wäre dies der Fall, so würde dadurch eine Verschlechterung und Schwächung des Erzeugnisses bewirkt werden. Gewöhnlich genügt eine 1 prozentige Lösung des Phenols oder auch von Kreosot, um' die Entvulkanisierung und Regenerierung des Gummis zu bewirken.The process changes with the types and nature of the rubber waste that exists but essentially in the following: After the added tissue fibers on destroyed in some known way, the dry gum mass will collapse with a dilute aqueous solution of phenol or creosote in a working chamber given. For example, a 1 to 10 percent phenol solution can be used. This solution must be weak enough that it has no dissolving effect on the rubber exercises; if this were the case, this would worsen and weaken the Product. Usually a 1 percent solution of the phenol is sufficient or creosote to 'devulcanize and regenerate the rubber cause.
Der Inhalt der Arbeitskammer wird dann so weit erhitzt, daß die Temperatur auf 150 bis 1900 C. steigt, so daß ein Druck von ungefähr 25 bis 28 kg pro qcm entsteht.The contents of the working chamber is then heated to the extent that the temperature rises to 150 to 190 0 C., so that a pressure of about 25 kg to 28 produced per square centimeter.
Je nach der Art des Gummis und dem Grad der in der Arbeitskammer herrschenden Hitze und dem Druck wird die Entvulkanisierung 6 bis 48 Stunden fortgesetzt. Hiernach wird die Gummimasse gewaschen, getrocknet und gemahlen, um dann in gewöhnlicher Weise verarbeitet zu werden.Depending on the type of rubber and the degree of prevailing in the working chamber With heat and pressure, devulcanization continues for 6 to 48 hours. After that the gum mass is washed, dried and ground in order to be processed in the usual way.
Während für gewöhnlich der Prozentgehalt ■ an Phenol oder Kreosot in der Wasser-While usually the percentage ■ of phenol or creosote in the water
lösung niedrig genug gehalten wird, um jegliche lösende Wirkung zu vermeiden, hat es sich in gewissen Fällen als vorteilhaft herausgestellt, den Prozentgehalt an Phenol selbst bis auf 25 Prozent zu erhöhen.solution is kept low enough to avoid any To avoid dissolving effects, it has proven to be advantageous in certain cases to to increase the percentage of phenol itself up to 25 percent.
Das nach vorliegendem Verfahren erhaltene Erzeugnis ist weich und leicht -verarbeitbar und erfordert keinen Zusatz neuen Gummis. Der nach dem Verfahren wiedergewonnene Gummi kann für die meisten Zwecke anstatt neuen Gummis verwendet werden. Das Verfahren besitzt den ausgesprochenen Vorteil, in der Praxis billig und ökonomisch zu sein und bedarf zu seiner Durchführung geringen Aufwands an Materialien und Zeit.The product obtained by the present process is soft and easy to process and does not require the addition of new rubbers. The recovered after the procedure Rubber can be used in place of new rubbers for most purposes. The procedure has the distinct advantage of being cheap and economical in practice and requires little material and time to carry it out.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE174797C true DE174797C (en) | 1900-01-01 |
Family
ID=439510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT174797D Expired DE174797C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE174797C (en) |
-
0
- DE DENDAT174797D patent/DE174797C/de not_active Expired
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