Process for depolymerization of solid mixed plastic
AssigneeSabic Global Technologies B.V.
InventorsRavichander Narayanaswamy, Alexander Stanislaus, Girish Koripelly, Sivakumar Periyasamy, Sadasivam Gopalakrishnan, Ranjith Puthanveedu, Anilkumar Mettu
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Abstract
Systems and methods for processing a plastic are disclosed. The system includes a feeding device in fluid communication with a cracking unit. A feed stream comprising a plastic is depolymerized in the feeding device at a depolymerization temperature to produce a hydrocarbonaceous wax stream. The hydrocarbonaceous wax stream is then cracked in the cracking unit. The cracking is conducted at a cracking temperature that is lower than, or the same as the depolymerization temperature.
Claims14
A method of processing a plastic, the method comprising:
- depolymerizing a plastic at a depolymerization temperature sufficient to produce a hydrocarbonaceous wax stream;
- and
- cracking the hydrocarbonaceous wax stream in the presence of a cracking catalyst under cracking conditions sufficient to produce a hydrocarbonaceous product stream comprising at least a partially depolymerized plastic;
- wherein the cracking conditions include a cracking temperature that is lower than, or the same as the depolymerization temperature;
- wherein components in the hydrocarbonaceous product stream have an average molecular weight of at least 3 times lower than the average molecular weight of the depolymerized components in the hydrocarbonaceous wax stream;
- wherein the cracking catalyst comprises an aluminosilicate zeolite, a metal loaded aluminosilicate, a metal naphthenate, a metal octanoate, or combinations thereof;
- wherein the catalyst scavenges chlorides and enhances production of straight chain hydrocarbons over branched hydrocarbons.
Dependencies are inferred from the claim text.