A process for purifying waste liquors containing nitrocresols

    公开(公告)号:GB1007264A

    公开(公告)日:1965-10-13

    申请号:GB592764

    申请日:1964-02-12

    Applicant: BAYER AG

    Abstract: Nitrocresols recovered in acetone, dioxane or tetrahydrofuran as washings from ion-exchangers is acidified and the organic solvent distilled off when the nitrocresol collects as an oil. Specifications 867,449 and 885,717 are referred to.ALSO:Ion exchangers used for removing nitrocresols from waste liquors are regenerated with mineral acids and acetone, dioxane or tetrahydrofuran. Specifications 867,449 and 885,717 are referred to.

    A SYSTEM AND METHOD FOR REMOVING LONG-CHAIN AND SHORT-CHAIN PER-AND POLYFLUOROALKYL SUBSTANCES (PFAS) FROM CONTAMINATED WATER

    公开(公告)号:AU2022219946A1

    公开(公告)日:2023-08-31

    申请号:AU2022219946

    申请日:2022-02-10

    Abstract: A system for removing long-chain and short-chain per- and polyfluoroalkyl substances (PFAS) from contaminated water using a regenerable anion exchange resin includes at least one first anion exchange resin vessel configured to receive a flow of water contaminated with long and short-chain PFAS compounds. The at least one first anion exchange resin vessel includes a first regenerable anion exchange resin therein having a high affinity for long-chain PFAS compounds configured such that a majority of the long-chain PFAS compounds sorb to the first regenerable anion exchange resin to remove a majority of the long-chain PFAS compounds from the contaminated water and produce a flow of water having a majority of the long-chain PFAS compounds removed. The system also include at least one second anion exchange resin vessel configured to receive the flow of water having a majority of the long-chain PFAS compounds removed.

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