PROCESS FOR THE PURIFICATION OF ORGANIC SULFUR COMPOUNDS

    公开(公告)号:US20220267293A1

    公开(公告)日:2022-08-25

    申请号:US17634473

    申请日:2020-08-13

    Applicant: BASF SE

    Abstract: A process for the purification of organic sulfur compounds involves bringing the organic sulfur compounds, in a liquid phase, into contact with an oxide of a metal from groups VIIb or VIIIb and an oxide of a metal from groups Ia to IIIa of the periodic system, or alternatively, with a mixed-oxide thereof; for a contact period of at least 1 minute. Afterwards, the oxides and the organic sulfur compounds are separated.

    METHOD FOR THE PREPARATION OF THIOCARBONATES

    公开(公告)号:US20220127241A1

    公开(公告)日:2022-04-28

    申请号:US17646766

    申请日:2022-01-03

    Applicant: BASF SE

    Abstract: A process can be used for the preparation of a compound with at least one five-membered cyclic monothiocarbonate group. The process involves a) using a compound with at least one epoxy group as starting material; b) reacting the compound with phosgene or an alkyl chloroformate, thus giving an adduct; and c) reacting the adduct with a compound containing anionic sulfur, thus obtaining the compound with at least one five-membered cyclic monothiocarbonate group.

    PROCESS FOR DISCOLORATION OF A COLORED POLYMERIC MATERIAL

    公开(公告)号:US20250032956A1

    公开(公告)日:2025-01-30

    申请号:US18719366

    申请日:2022-12-19

    Applicant: BASF SE

    Abstract: In a first aspect, the invention relates to a process for discoloration of a colored polymeric material comprising: (i) providing a colored polymeric material and providing a solvent comprising gamma-valerolactone: (ii) contacting the colored polymeric material with a solvent comprising gamma-valerolactone at a temperature in the range of from 40 to 170° C. thereby obtaining a solvent, which is enriched in colorant compared to the solvent provided in (i), and a polymeric material, which is depleted in colorant compared to the colored polymeric material provided in (i). A second aspect of the invention is related to a polymeric material, which is depleted in colorant obtained or obtainable from the process of the first aspect. In a third aspect, the invention is related to a use of the polymeric material, which is depleted in colorant according to the second aspect for textile applications, fiber applications, packaging applications or plastic applications. A fourth aspect of the invention is related to a method for preparing a textile or a packaging comprising (a) providing a polymeric material, which is depleted in colorant, preferably a polymeric material, which is depleted in colorant of the second aspect: (b) preparing a textile or a packaging from the polymeric material provided in (a).

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