METHOD FOR PRODUCING RECYCLED POLYETHYLENE HAVING LOW B* VALUE

    公开(公告)号:WO2023283589A1

    公开(公告)日:2023-01-12

    申请号:PCT/US2022/073491

    申请日:2022-07-07

    Abstract: A method for purifying a contaminated reclaimed polyethylene. The method includes providing the contaminated reclaimed polyethylene, extracting it with a solvent to produce an extracted contaminated reclaimed polyethylene, and then dissolving it in the solvent to produce a first suspension comprising dissolved polyethylene and suspended contaminants. The first suspension is settled to produce a second suspension comprising dissolved polyethylene and suspended remaining contaminants, and the second suspension is purified by contacting it with solid media to produce a third suspension comprising purer polyethylene. Finally, the purer polyethylene is separated from the third suspension and it has low b* value.

    METHOD FOR PRODUCING RECYCLED POLYETHYLENE WITH VIRGIN-LIKE OPTICAL PROPERTIES

    公开(公告)号:WO2022026197A1

    公开(公告)日:2022-02-03

    申请号:PCT/US2021/041762

    申请日:2021-07-15

    Abstract: A method for purifying a contaminated reclaimed polyethylene is provided. The method comprises obtaining the contaminated reclaimed polyethylene, extracting it with a solvent to produce an extracted contaminated reclaimed polyethylene, and then dissolving it in the solvent to produce a first suspension comprising dissolved polyethylene and suspended contaminants. The first suspension is settled to produce a second suspension comprising dissolved polyethylene and suspended remaining contaminants, and the second suspension is purified by contacting it with solid media to produce a third suspension comprising purer polyethylene. Finally, the purer polyethylene is separated from the third suspension and it has virgin-like optical properties.

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