METHOD FOR PRODUCING WAXES AND GREASE BASE STOCKS THROUGH CATALYTIC DEPOLYMERISATION OF WASTE PLASTICS
First Claim
1. A process for converting mixed polyethylene waste to make waxes and grease base stock through catalytic depolymerization, comprising:
- preheating the mixed polyethylene waste to form a molten mixed polyethylene waste;
starting depolymerization reaction of the molten mixed polyethylene waste using a catalyst in a high pressure reactor at a desired temperature using heaters in the high pressure reactor and wherein the catalyst is disposed on a stirring blade;
allowing progression of the depolymerization reaction of the molten mixed polyethylene waste to continue until a pressure in the high pressure reactor reaches a desired value; and
turning off the heaters and stopping the depolymerization reaction of the molten mixed polyethylene waste upon the pressure in the reactor reaching the desired value and wherein the mixed polyethylene waste is converted to wax or a grease base stock.
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Accused Products
Abstract
A process of depolymerization of mixed polyethylene waste is disclosed. In one embodiment, in a process for converting mixed polyethylene waste to make waxes and grease base stocks through catalytic depolymerization, the mixed polyethylene waste is preheated to form a molten mixed polyethylene waste. Then depolymerization reaction of the molten mixed polyethylene waste is started. The depolymerization reaction uses a catalyst in a high pressure reactor at a desired temperature using heaters in the high pressure reactor. The catalyst is disposed on a stirring blade. Progression of depolymerization reaction of the molten mixed polyethylene waste is allowed to continue until a pressure in the high pressure reactor reaches a desired value. The heaters are turned off and depolymerization reaction of the molten mixed polyethylene waste is stopped upon the pressure in the reactor reaching desired value. The mixed polyethylene waste is converted to wax or grease base stock.
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Citations
25 Claims
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1. A process for converting mixed polyethylene waste to make waxes and grease base stock through catalytic depolymerization, comprising:
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preheating the mixed polyethylene waste to form a molten mixed polyethylene waste; starting depolymerization reaction of the molten mixed polyethylene waste using a catalyst in a high pressure reactor at a desired temperature using heaters in the high pressure reactor and wherein the catalyst is disposed on a stirring blade; allowing progression of the depolymerization reaction of the molten mixed polyethylene waste to continue until a pressure in the high pressure reactor reaches a desired value; and turning off the heaters and stopping the depolymerization reaction of the molten mixed polyethylene waste upon the pressure in the reactor reaching the desired value and wherein the mixed polyethylene waste is converted to wax or a grease base stock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for converting primary granules of polyethylene to make waxes and grease base stock through catalytic depolymerization, comprising:
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preheating the primary granules of polyethylene to form a molten primary granules of polyethylene; starting depolymerization reaction of the molten primary granules of polyethylene using a catalyst in a high pressure reactor at a desired temperature using heaters in the high pressure reactor and wherein the catalyst is disposed on a stirring blade; allowing progression of the depolymerization reaction of the molten primary granules of polyethylene to continue until a pressure in the high pressure reactor reaches a desired value; and turning off the heaters and stopping the depolymerization reaction of the molten primary granules of polyethylene upon the pressure in the reactor reaching the desired value and wherein the primary granules of polyethylene is converted to wax or grease base stock. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A process for converting mixed polyethylene waste to make grease base stock through catalytic depolymerization, comprising:
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preheating the mixed polyethylene waste to form a molten mixed polyethylene waste; starting depolymerization reaction of the molten mixed polyethylene waste using a catalyst in a high pressure reactor at a desired temperature using heaters in the high pressure reactor and wherein the catalyst is disposed on a stirring blade; allowing progression of the depolymerization reaction of the molten mixed polyethylene waste to continue until a pressure in the high pressure reactor reaches a desired value; and turning off the heaters and stopping the depolymerization reaction of the molten mixed polyethylene waste upon the pressure in the reactor reaching the desired value and wherein the mixed polyethylene waste is converted to the grease base stock. - View Dependent Claims (23)
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24. A process for converting mixed polyethylene waste to make waxes through catalytic depolymerization, comprising:
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preheating the mixed polyethylene waste to form a molten mixed polyethylene waste; starting depolymerization reaction of the molten mixed polyethylene waste using a catalyst in a high pressure reactor at a desired temperature using heaters in the high pressure reactor and wherein the catalyst is disposed on a stirring blade; allowing progression of the depolymerization reaction of the molten mixed polyethylene waste to continue until a pressure in the high pressure reactor reaches a desired value; and turning off the heaters and stopping the depolymerization reaction of the molten mixed polyethylene waste upon the pressure in the reactor reaching the desired value and wherein the mixed polyethylene waste is converted to wax. - View Dependent Claims (25)
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Specification