Compositions from the chemical recycling of plastic-derived streams and uses thereof
AssigneeEastman Chemical Company
InventorsDaryl Bitting, David Eugene Slivensky, Xianchun Wu, Bruce Roger DeBruin, Damon Ray Billodeaux
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Abstract
Methods and systems are provided for the conversion of waste plastics into various useful downstream recycle-content products. More particularly, the present system and method involves integrating a pyrolysis facility with a cracker facility by introducing at least a stream of r-pyrolysis gas into the cracker facility. In the cracker facility, the r-pyrolysis gas may be separated to form one or more recycle content products, and can enhance the operation of the facility.
Claims15
A recycle content pyrolysis gas (r-pyrolysis gas) composition, wherein said r-pyrolysis gas composition comprises:
- at least 20 and not more than 75 weight percent of ethylene and/or propylene;
- at least 5 and not more than 50 weight percent of ethane and/or propane;
- at least 5 and not more than 60 weight percent of methane;
- an ethylene to ethane weight ratio or propylene to propane weight ratio of at least 1:1 and not more than 3:1;
- C4+ olefins in an amount of not more than 10 weight percent;
- C4 paraffins in an amount of not more than 5 weight percent;
- and
- at least one of the following properties (i) through (ix):
- (i) C4 hydrocarbons in an amount of not more than 20 weight percent;
- (ii) hydrogen in an amount of not more than 10 weight percent;
- (iii) C3+ diolefins in an amount of not more than 10 weight percent;
- (iv) halogens in an amount of not more than 1 ppm;
- (v) carbonyls in an amount of not more than 100 ppm;
- (vi) carbon dioxide in an amount of not more than 100 ppm;
- (vii) carbon monoxide in an amount of not more than 2500 ppm;
- (viii) arsine and/or phosphine in an amount of not more than 15 ppb;
- and
- (ix) sulfur-containing compounds in an amount of not more than 100 ppm, and
- wherein said r-pyrolysis gas is formed by the pyrolysis of recycle waste plastic or materials derived therefrom;
- and wherein said composition comprises at least 0.5 and not more than about 35 weight percent of butadiene, based on the total weight of the composition.
Dependencies are inferred from the claim text.