WO2014177727A1 - Continuous depolymerisation reactor - Google Patents
Continuous depolymerisation reactor Download PDFInfo
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- WO2014177727A1 WO2014177727A1 PCT/ES2013/070271 ES2013070271W WO2014177727A1 WO 2014177727 A1 WO2014177727 A1 WO 2014177727A1 ES 2013070271 W ES2013070271 W ES 2013070271W WO 2014177727 A1 WO2014177727 A1 WO 2014177727A1
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- reactor
- depolymerizing
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- condenser
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/14—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot liquids, e.g. molten metals
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/10—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
Definitions
- the following invention refers to a continuous depolymerizing reactor, being of the type of reactors to which the ground plastic material is provided for depolymerization obtaining the starting monomer in the gaseous state which will be conducted to a condenser to obtain the monomer in a liquid state for later use, allowing an optimization of the system and a profitability of it.
- a continuous depolymerizing reactor is described herein, which is applicable in the treatment of all types of plastic materials.
- plastics are synthetic chemical substances called polymers, of macromolecular structure that can be molded by heat or pressure, according to very different conformations. These polymers are clusters of monomers linked by a chemical process called polymerization.
- plastic materials have been part of our daily life for many years, so that one of the biggest drawbacks they present is their limited degradation capacity, so they have a very long life and high environmental pollution, so Each time there is a greater tendency to make less use of them and proceed to recycling.
- depolymerization or inverse polymerization to obtain the starting monomer, in this way, once the grinding of the plastic waste is carried out, the thermal decomposition of the polymer that is carried out in a boiler with molten lead as a reagent, obtaining the base monomer in the gaseous state, which will be conducted to a water-cooled coil for the final obtaining of the base monomer in the liquid state.
- a drawback of this procedure is that it is carried out discontinuously, that is, the ground plastic material is introduced into the boiler, closing and proceeding to heat it, according to the indicated process, to obtain the base monomer in a liquid state, of so that once the process is finished, the boiler must be allowed to cool down to be able to be opened, to clean it and to be able to start a new cycle.
- a continuous depolymerizing reactor is described herein, being of the type of reactors to which the ground plastic material is provided for depolymerization obtaining the starting monomer in a gaseous state that will be conducted to a condenser to obtain the monomer in a liquid state , allowing an optimization of the system and a profitability thereof, so that the plastic material ground by a feeder screw is continuously introduced into the reactor and the obtained monomer is evacuated through a conduit arranged in a horizontal radial position towards a condenser, providing the reactor of an agitator equipped with several members integral to the axis consisting of: a pair of triangular plates in a position inferior to the axis diametral; a pair of combs, also in its lower part, orthogonal to the pair of triangular plates, with its lower free end slightly below the level of the pair of triangular plates, and; a trio of wings at 120 ° each other in a higher position.
- a compressor that blows air through the bottom of the reactor is associated with the reactor, once the reactive lead melts, for cleaning ashes and other charges, so that the cleaning operation can be started when the reactor is still at high temperatures, allowing a profitability and optimization of the process to be completed in a much shorter time.
- an extractor is associated to the reactor, on the upper part, which will extract the ashes and other charges and store them in a tank.
- the evacuation line of the monomer in a gaseous state from the reactor to a condenser is provided with a shut-off valve acting in the operation of cleaning the ashes and other charges, in order to prevent the passage of ashes or other charges to the condenser ..
- Figure 1 It shows a schematic elevation view of a depolymerizing reactor with the elements associated with it.
- Figure 2 It shows a view of the depolymerizing reactor agitator rotated 90 ° with respect to the position of figure 1, being able to observe the pair of combs that are orthogonal to the pair of triangular plates.
- the ground plastic material 2 is continuously introduced by means of an auger screw 3 that is associated with a receiving hopper 4 to which it is the material is conducted by a feeder conductor 16 from the corresponding storage tank thereof, the input of ground plastic 2 being able to be regulated by means of the aforementioned feeder screw 3.
- the working temperature range will start the gasification of the ground plastic material 2 contained inside and will have an automatic and Continuous depolymerization process which is a great advantage allowing profitability and optimization of the process, reducing the process time considerably.
- the stirrer 5 that facilitates the gasification of the ground plastic material 2 is constituted by an axis with various members integral thereto defined by: a pair of triangular plates 9 in diametral position and inferior to the axis;
- a compressor 12 is associated to the depolymerizing reactor 1 that blows air through the bottom of the reactor 1, through the inlets 19, once the reactive lead 20 melts after finishing the work and lowering its temperature, for cleaning of ashes and other charges.
- the conduit associated with the compressor 12 provided with the air inlets 19 to the reactor 1 will be provided with the corresponding shut-off valve.
- an extractor 13 is associated to the depolymerizing reactor 1, on its upper part, which will extract the ashes and other charges and store them in a tank 14.
- the outlet duct of the ashes and other charges will be provided with a shut-off valve 18 .
- the duct 6 for evacuation of the monomer in a gaseous state from the depolymerizing reactor 1 to a condenser 7 is provided with a shut-off valve 15 acting in the operation of cleaning the ashes and other charges, that is, at the time it leaves to clean the ashes and other residual charges that remain in the reactor at Finish the work, said valve will close to prevent them from reaching the condenser 7.
- valve 15 of the outlet duct 6 of the base monomer in the gaseous state towards the condenser 7 will be closed while the valve 18 will open when the extractor 13 is operated and once the Ashes will act in reverse.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
Description
REACTOR DESPOLIMERIZADOR EN CONTINUO- CONTINUOUS DEPOLIMERIZING REACTOR-
OBJETO DE LA INVENCIÓN. OBJECT OF THE INVENTION
La siguiente invención, según se expresa en el enunciado de la presente memoria descriptiva, se refiere a un reactor despolimerizador en continuo, siendo del tipo de reactores a los que se aporta el material plástico molido para su despolimerización obteniendo el monómero de partida en estado gaseoso que será conducido a un condensador para obtener el monómero en estado líquido para su posterior utilización, permitiendo una optimización del sistema y una rentabilización del mismo. The following invention, as expressed in the statement of the present specification, refers to a continuous depolymerizing reactor, being of the type of reactors to which the ground plastic material is provided for depolymerization obtaining the starting monomer in the gaseous state which will be conducted to a condenser to obtain the monomer in a liquid state for later use, allowing an optimization of the system and a profitability of it.
CAMPO DE APLICACIÓN. SCOPE.
En la presente memoria se describe un reactor despolimerizador en continuo, el cual es de aplicación en el tratamiento de todo tipo de materiales plásticos. A continuous depolymerizing reactor is described herein, which is applicable in the treatment of all types of plastic materials.
ANTECEDENTES DE LA INVENCIÓN. BACKGROUND OF THE INVENTION
Como es conocido los plásticos son sustancias químicas sintéticas denominados polímeros, de estructura macromolecular que puede ser moldeada mediante calor o presión, según muy diversa conformaciones. Estos polímeros son agrupaciones de monómeros unidos mediante un proceso químico llamado polimerización. As is known, plastics are synthetic chemical substances called polymers, of macromolecular structure that can be molded by heat or pressure, according to very different conformations. These polymers are clusters of monomers linked by a chemical process called polymerization.
Así, los materiales plásticos forman desde hace muchos años parte de nuestra vida diaria, de forma que uno de los mayores inconvenientes que presentan es su limitada capacidad de degradación, por lo que tienen una muy larga vida y una alta contaminación medioambiental, por lo que cada vez se tiene una mayor tendencia a hacer un menor uso de los mismos y proceder á su reciclado. Thus, plastic materials have been part of our daily life for many years, so that one of the biggest drawbacks they present is their limited degradation capacity, so they have a very long life and high environmental pollution, so Each time there is a greater tendency to make less use of them and proceed to recycling.
De esta forma, para su reciclado son utilizados diferentes procesos mediante los cuales las moléculas de los polímeros se rompen dando origen nuevamente a monómeros como materia prima básica que puede ser utilizada para fabricar nuevos plásticos u otros usos. In this way, for its recycling different processes are used by which the molecules of the polymers are broken giving rise again to monomers as a basic raw material that can be used to manufacture new plastics or other uses.
Entre los medios utilizados se encuentra la despolimerización o polimerización inversa, para obtener el monómero de partida, de esta forma, una vez efectuada la molienda de los residuos plásticos se procederá a la descomposición térmica del polímero que se lleva a cabo en una caldera con plomo fundido como reactivo, obteniendo el monómero base en estado gaseoso, que será conducido a un serpentín refrigerado por agua para la obtención final del monómero base en estado líquido. Among the means used is depolymerization or inverse polymerization, to obtain the starting monomer, in this way, once the grinding of the plastic waste is carried out, the thermal decomposition of the polymer that is carried out in a boiler with molten lead as a reagent, obtaining the base monomer in the gaseous state, which will be conducted to a water-cooled coil for the final obtaining of the base monomer in the liquid state.
Un inconveniente de este procedimiento es que se lleva a cabo de forma discontinua, esto es, el material plástico molido se introduce en la caldera cerrándose y procediéndose a calentarlo, de acuerdo al proceso indicado, para la obtención del monómero base en estado líquido, de forma que una vez finalizado el proceso se debe dejar enfriar la caldera para poder ser abierta, proceder a su limpieza y poder volver a iniciar un nuevo ciclo. A drawback of this procedure is that it is carried out discontinuously, that is, the ground plastic material is introduced into the boiler, closing and proceeding to heat it, according to the indicated process, to obtain the base monomer in a liquid state, of so that once the process is finished, the boiler must be allowed to cool down to be able to be opened, to clean it and to be able to start a new cycle.
Así, cada proceso en discontinuo requiere la inversión de mucho tiempo haciendo que, realmente, no sea un proceso rentable. Thus, each discontinuous process requires a long time investment making it really not a profitable process.
DESCRIPCIÓN DE LA INVENCIÓN. DESCRIPTION OF THE INVENTION
En la presente memoria se describe un reactor despolimerizador en continuo, siendo del tipo de reactores a los que se aporta el material plástico molido para su despolimerización obteniendo el monómero de partida en estado gaseoso que será conducido a un condensador para obtener el monómero en estado líquido, permitiendo una optimización del sistema y una rentabilización del mismo, de forma que al reactor es introducido en continuo el material plástico molido por un tornillo sinfín alimentador y el monómero obtenido es evacuado por un conducto dispuesto en posición radial horizontal hacia un condensador, disponiendo el reactor de un agitador dotado de diversos miembros solidarios al eje constituidos por: una pareja de pletinas triangulares en posición inferior diametral al eje; una pareja de peines, igualmente en su parte inferior, en posición ortogonal a la pareja de pletinas triangulares, con su extremo libre inferior ligeramente bajo el ras de la pareja de pletinas triangulares, y; un trío de alas a 120° entre sí en posición superior. A continuous depolymerizing reactor is described herein, being of the type of reactors to which the ground plastic material is provided for depolymerization obtaining the starting monomer in a gaseous state that will be conducted to a condenser to obtain the monomer in a liquid state , allowing an optimization of the system and a profitability thereof, so that the plastic material ground by a feeder screw is continuously introduced into the reactor and the obtained monomer is evacuated through a conduit arranged in a horizontal radial position towards a condenser, providing the reactor of an agitator equipped with several members integral to the axis consisting of: a pair of triangular plates in a position inferior to the axis diametral; a pair of combs, also in its lower part, orthogonal to the pair of triangular plates, with its lower free end slightly below the level of the pair of triangular plates, and; a trio of wings at 120 ° each other in a higher position.
Por otra parte, al reactor está asociado un compresor que insufla aire por la parte inferior del reactor, una vez funde el ploma reactivo, para la limpieza de cenizas y otras cargas, de forma que la operación de limpieza puede iniciarse cuando el reactor todavía está a altas temperaturas, permitiendo una rentabilización y optimización del proceso al poder completarse en un tiempo mucho menor. Asimismo, al reactor está asociado un extractor, por su parte superior, que extraerá las cenizas y otras cargas y las almacenará en un depósito. On the other hand, a compressor that blows air through the bottom of the reactor is associated with the reactor, once the reactive lead melts, for cleaning ashes and other charges, so that the cleaning operation can be started when the reactor is still at high temperatures, allowing a profitability and optimization of the process to be completed in a much shorter time. Likewise, an extractor is associated to the reactor, on the upper part, which will extract the ashes and other charges and store them in a tank.
El conducto de evacuación del monómero en estado gaseoso desde el reactor hasta un condensador está dotado de una válvula de cierre de actuación en la operación de limpieza de las cenizas y otras cargas, con objeto de evitar el paso de cenizas u otras cargas hacia el condensador.. The evacuation line of the monomer in a gaseous state from the reactor to a condenser is provided with a shut-off valve acting in the operation of cleaning the ashes and other charges, in order to prevent the passage of ashes or other charges to the condenser ..
De esta forma, tenemos una producción en continuo que, además, mediante el agitador facilita el proceso de gasificación del monómero. In this way, we have a continuous production that, in addition, by means of the agitator facilitates the process of gasification of the monomer.
Para complementar la descripción que seguidamente se va a realizar, y con objeto de ayudar a una mejor comprensión de las características de la invención, se acompaña a la presente memoria descriptiva, de un juego de planos, en cuyas figuras de forma ilustrativa y no limitativa, se representan los detalles más característicos de la invención. To complement the description that is going to be carried out below, and in order to help a better understanding of the characteristics of the invention, this descriptive report is accompanied by a set of drawings, whose figures are illustrative and not limiting , the most characteristic details of the invention are represented.
BREVE DESCRIPCIÓN DE LOS DISEÑOS. BRIEF DESCRIPTION OF THE DESIGNS.
Figura 1 . Muestra una vista esquemática en alzado de un reactor despolimerizador con los elementos asociados a él. Figure 1 . It shows a schematic elevation view of a depolymerizing reactor with the elements associated with it.
Figura 2. Muestra una vista del agitador del reactor despolimerizador girado 90° respecto de la posición de la figura 1 , pudiendo observar la pareja de peines que están en posición ortogonal a la pareja de pletinas triangulares. Figure 2. It shows a view of the depolymerizing reactor agitator rotated 90 ° with respect to the position of figure 1, being able to observe the pair of combs that are orthogonal to the pair of triangular plates.
DESCRIPCIÓN DE UNA REALIZACIÓN PREFERENTE. DESCRIPTION OF A PREFERRED EMBODIMENT.
A la vista de las comentadas figuras y de acuerdo con la numeración adoptada podemos observar como al reactor 1 es introducido en continuo el material plástico molido 2 por medio de un tornillo sinfín alimentador 3 que está asociado a una tolva de recepción 4 a la que es conducido el material por un conductor alimentador 16 desde el correspondiente depósito de almacenaje del mismo, pudiendo regular el aporte de material plástico molido 2 por medio del citado tornillo sinfín alimentador 3. Al alcanzar el reactor 1 despolimerizador el rango de temperatura de trabajo se iniciará la gasificación del material plástico molido 2 contenido en su interior y se tendrá un automático y continuo proceso despolimerizador lo cual es una gran ventaja permitiendo rentabilizar y optimizar el proceso, al reducir el tiempo del proceso de forma considerable. In view of the aforementioned figures and in accordance with the numbering adopted we can observe how to the reactor 1 the ground plastic material 2 is continuously introduced by means of an auger screw 3 that is associated with a receiving hopper 4 to which it is the material is conducted by a feeder conductor 16 from the corresponding storage tank thereof, the input of ground plastic 2 being able to be regulated by means of the aforementioned feeder screw 3. Upon reaching the depolymerizer reactor 1 the working temperature range will start the gasification of the ground plastic material 2 contained inside and will have an automatic and Continuous depolymerization process which is a great advantage allowing profitability and optimization of the process, reducing the process time considerably.
De esta forma, se tiene un proceso en continuo por el que el material plástico molido 2 se aporta al reactor 1 por medio de un tornillo sinfín alimentador 3 que está asociado a una tolva de recepción 4 del material plástico molido 2, de manera que en el reactor 1 se produce la gasificación del material obteniendo el monómero base, en lo que colabora el agitador 5, siendo evacuado el monómero base en estado gaseoso por un conducto 6 en posición radial horizontal al mismo hacia un condensador ? donde pasa al estado líquido para ser recogido por la boca de salida 8. In this way, there is a continuous process whereby the ground plastic material 2 is supplied to the reactor 1 by means of a feed screw 3 which is associated with a receiving hopper 4 of the ground plastic material 2, so that in Does the reactor 1 produce the gasification of the material obtaining the base monomer, in which the stirrer 5 collaborates, the base monomer being evacuated in a gaseous state through a conduit 6 in a horizontal radial position thereto towards a condenser? where it enters the liquid state to be picked up through the outlet 8.
El agitador 5 que facilita la gasificación del material plástico molido 2 se constituye por un eje con diversos miembros solidarios a él definidos por: una pareja de pletinas triangulares 9 en posición diametral e inferior al eje; The stirrer 5 that facilitates the gasification of the ground plastic material 2 is constituted by an axis with various members integral thereto defined by: a pair of triangular plates 9 in diametral position and inferior to the axis;
una pareja de peines 10 en posición diametral, igualmente en su parte inferior, y en posición ortogonal a la pareja de pletinas triangulares 9, con su extremo libre inferior ligeramente bajo el ras de dicha pareja de pletinas triangulares, y; a pair of combs 10 in diametral position, also in its lower part, and in orthogonal position to the pair of triangular plates 9, with its lower free end slightly below the flush of said pair of triangular plates, and;
unas alas 1 1 radiales al eje en posición superior. 1 1 radial wings to the shaft in the upper position.
Por otra parte, al reactor 1 despolimerizador está asociado un compresor 12 que insufla aire por la parte inferior del reactor 1 , a través de las entradas 19, una vez funde el ploma reactivo 20 tras finalizar el trabajo y descender su temperatura, para la limpieza de cenizas y otras cargas. El conducto asociado al compresor 12 provisto de las entradas 19 de aire al reactor 1 estará provisto d ela correspondiente válvula de cierre. On the other hand, a compressor 12 is associated to the depolymerizing reactor 1 that blows air through the bottom of the reactor 1, through the inlets 19, once the reactive lead 20 melts after finishing the work and lowering its temperature, for cleaning of ashes and other charges. The conduit associated with the compressor 12 provided with the air inlets 19 to the reactor 1 will be provided with the corresponding shut-off valve.
Asimismo, al reactor 1 despolimerizador está asociado un extractor 13, por su parte superior, que extraerá las cenizas y otras cargas y las almacenará en un depósito 14. El conducto de salida de las cenizas y otras cargas estará provisto de una válvula 18 de cierre. Likewise, an extractor 13 is associated to the depolymerizing reactor 1, on its upper part, which will extract the ashes and other charges and store them in a tank 14. The outlet duct of the ashes and other charges will be provided with a shut-off valve 18 .
El conducto 6 de evacuación del monómero en estado gaseoso desde el reactor 1 despolimerizador hasta un condensador 7 está dotado de una válvula 15 de cierre de actuación en la operación de limpieza de las cenizas y otras cargas, es decir, en el momento que se vaya a efectuar la limpieza de las cenizas y otras cargas residuales que quedan en el reactor al finalizar el trabajo, dicha válvula se cerrará para evitar que puedan llegar hasta el condensador 7. The duct 6 for evacuation of the monomer in a gaseous state from the depolymerizing reactor 1 to a condenser 7 is provided with a shut-off valve 15 acting in the operation of cleaning the ashes and other charges, that is, at the time it leaves to clean the ashes and other residual charges that remain in the reactor at Finish the work, said valve will close to prevent them from reaching the condenser 7.
De esta forma, cuando se efectúe la limpieza de las cenizas se cerrará la válvula 15 del conducto 6 de salido del monómero base en estado gaseoso hacia el condensador 7 en tanto que la válvula 18 se abrirá al accionar el extractor 13 y una vez extraídas las cenizas se actuará de forma inversa. In this way, when cleaning the ashes, the valve 15 of the outlet duct 6 of the base monomer in the gaseous state towards the condenser 7 will be closed while the valve 18 will open when the extractor 13 is operated and once the Ashes will act in reverse.
Claims
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ES2013/070271 WO2014177727A1 (en) | 2013-04-30 | 2013-04-30 | Continuous depolymerisation reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ES2013/070271 WO2014177727A1 (en) | 2013-04-30 | 2013-04-30 | Continuous depolymerisation reactor |
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| WO2014177727A1 true WO2014177727A1 (en) | 2014-11-06 |
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| US11999920B2 (en) | 2020-09-14 | 2024-06-04 | Ecolab Usa Inc. | Cold flow additives for plastic-derived synthetic feedstock |
| US12031097B2 (en) | 2021-10-14 | 2024-07-09 | Ecolab Usa Inc. | Antifouling agents for plastic-derived synthetic feedstocks |
| US12304888B2 (en) | 2021-03-10 | 2025-05-20 | Ecolab Usa Inc. | Stabilizer additives for plastic-derived synthetic feedstock |
| US12503663B2 (en) | 2024-04-26 | 2025-12-23 | Ecolab Usa Inc. | Cold flow additives for plastic-derived synthetic feedstock |
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| US12031097B2 (en) | 2021-10-14 | 2024-07-09 | Ecolab Usa Inc. | Antifouling agents for plastic-derived synthetic feedstocks |
| US12503663B2 (en) | 2024-04-26 | 2025-12-23 | Ecolab Usa Inc. | Cold flow additives for plastic-derived synthetic feedstock |
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