TH45385A - Method for converting polyolefin waste to hydrocarbons And treatment plants for processing such products. - Google Patents

Abstract

DC60 (19/06/43) For the purposes of this invention, a method for the conversion of polyolefin waste into hydrocarbons and a treatment plant for such operation. Under this method, the dispersed polyolefin raw material is introduced into a reactor for further heating to temperatures below 600 °C with a catalyst selected from the group of cement, heavy metals, silicate and kalofonate and mixtures of such materials. The catalyst is used in quantities of less than 30% b.w., preferably 5-10% b.w. calculated on the weight of the polyolefin raw material. The treatment plant for the conversion of polyolefin waste into hydrocarbons consists of a vertical drum reactor provided with a heating system in the form of a combustion chamber (8) that surrounds the drum from below, and this chamber (8) is heated by at least one burner (9) supplied with the product. The reactor and combustion chamber are fitted with heating pipes (10) symmetrically distributed along the circumference of the tank, preferably in a partial row that passes throughout the tank above the upper edge of the mixer (6), and which are discharged through a sieve (7) to the combustion gas discharge chamber. The purpose of this invention is a method for the conversion of polyolefin waste into hydrocarbons and a treatment plant for such operation. Under this method, the dispersed polyolefin raw material is introduced into the reactor for further heating to temperatures below 600 °C with a catalyst selected from a group consisting of cement, heavy metals, silicates and kalofonates and mixtures thereof. The catalyst is used in quantities less than 30% b.w., preferably 5-10% b.w. calculated on the weight of the polyolefin raw material. The treatment plant for the conversion of polyolefin waste into hydrocarbons is comprised of The reactor is a vertical tank-shaped unit, provided with a heating system in the form of a combustion chamber (8) that surrounds the tank from below, and this chamber (8) is heated by at least one burner (9), which is supplied with the reaction product, and in the combustion chamber is fitted with heating pipes (10) that are symmetrically distributed along the circumference of the tank, preferably in a partial row that passes throughout the interior of the tank above the level of the mixer (6) and is expelled through a mesh screen (7) to the exhaust gas chamber.

Claims (30)

1. Method for converting polyolefin waste into hydrocarbons: The fractured polyolefin raw material is further heated under a catalyst in a closed reactor, and the condensed product is refined. A unique characteristic of this process is that the dispersed polyolefin raw material is further heated to below 600°C in combination with a catalyst selected from groups containing cement, heavy metals, silicates, and kalophonates, and mixtures of these. The catalyst is used in quantities less than 30% b.w., with 5-10% b.w. being preferable, calculated based on the weight of the polyolefin raw material. 2. The method under claim 1 is characterized by the reaction being carried out within a temperature range of 300-450°C. 3. A method pursuant to claim 1 characterized by the use of the catalyst in an amount of 5–10% b.w. calculated on the weight of the polyolefin raw material. 4. Any of the methods under claims 1 through 3 that are characterized by the use of heavy metals and silicates as catalysts. 5. The method under claim 4 is characterized by the use of chromium silicate as a catalyst. 6. The method under claim 4 is characterized by the use of iron silicate as a catalyst. 7. The method under claim 4 is characterized by the use of nickel silicate as a catalyst. 8. The method under claim 4 is characterized by the use of cobalt silicate as a catalyst. 9. The method under claim 4 is characterized by the use of manganese silicate as a catalyst. 10. The method under claim 4 is unique in that cadmium silicate is used as a catalyst. 11. The method under claim 4 is unique in that copper silicate is used as a catalyst. 12. The method under claim 4 is unique in that zinc silicate is used as a catalyst. 13. Any of the methods under claims 1-3 that have the special characteristic of using heavy metal calophonates as catalysts. 14. The method under claim 13 is unique in that chromium calofonate is used as a catalyst. 15. The method under claim 13 is unique in that iron calofonate is used as a catalyst. 16. The method under claim 13 is unique in that nickel calofonate is used as a catalyst. 17. The method under claim 13 is unique in that cobalt kalofonate is used as a catalyst. 18. The method under claim 13 is of a special nature in which manganese calofonate is used as a catalyst. 19. The method under claim 13 is unique in that cadmium calofonate is used as a catalyst. 20. The method under claim 13 is unique in that copper kalofonate is used as a catalyst. 21. The method under claim 13 is characterized by the use of zinc calofonate as a catalyst. 22. The method under claim 13 is unique in that lead kalofonate is used as a catalyst. 23. The method under claim 1 is of a special nature in that the catalyst used is a mixture of heavy metals, two or more silicates. 24. One of the methods under claim 3-22, which is characterized by the deposition of silicates and/or kalophonates on an aluminum oxide carrier (Al2O3), is used. 25. The method under claim 1 is of a special nature in which the catalyst is composed of white cement and/or Portland cement and/or pulsolanix cement or a mixture of at least two of the above. 26. The method under claim 1 is unique in that a mixture containing white cement and chromium silicate and/or kalophonate in amounts up to 20% b.w. (calculated by mass of cement) is used as a catalyst. 27. The method under claim 1 is unique in that the catalyst can be regenerated and reprocessed multiple times. 28. The method under claim 1 is of a special nature in that the process can be carried out in a phased or continuous manner. 29. A treatment plant for the conversion of polyolefin waste into hydrocarbons, consisting of a vertical tank reactor fitted with an inlet, connected to a feed and catalyst dosing device, a product vapor receiver, a mixer, a liquid level control system, and a distillation column. It is unique in that the reactor is provided with a heating system in the form of a combustion chamber (8) that surrounds the tank from below, and this chamber (8) is heated by at least one burner (9), which is supplied with the reaction product, and in the combustion chamber is fitted with heating pipes (10) that are symmetrically distributed along the circumference of the tank, preferably in a series of thin rows that pass throughout the interior of the tank above the upper edge of the mixer (6) and are expelled through a sieve (7) to the combustion gas discharge chamber. 30. The treatment plant under claim 29 is of a special nature in which the buffer tank (22) is provided with a level detector which is integrated into the automatic material dispensing control system (3).