Recovery of (meth) acrylic resin by depolymerization and hydrolysis

    公开(公告)号:US11739192B2

    公开(公告)日:2023-08-29

    申请号:US17049735

    申请日:2019-04-26

    Applicant: Arkema France

    Inventor: Jean-Luc Dubois

    Abstract: The invention relates to a process (100) for the recycling of an article based on (meth)acrylic thermoplastic polymer resin, characterized in that it comprises the following steps:



    introduction (110) of the article into a system suitable for the recycling of thermoplastic polymer,
    at least partial depolymerization (130) of the (meth)acrylic thermoplastic polymer resin so as to form (meth)acrylate monomers,
    introduction (140) of a hydrolysis catalyst into a hydrolysis reactor,
    introduction (150) of water into said hydrolysis reactor, and
    conversion (160), in the hydrolysis reactor, of at least part of the (meth)acrylate monomers into (meth)acrylic acid.




    The invention also relates to a system for recycling an article based on (meth)acrylic thermoplastic polymer resin.

    RENEWABLE ALKENE PRODUCTION ENGAGING METATHESIS

    公开(公告)号:US20220363613A1

    公开(公告)日:2022-11-17

    申请号:US17762893

    申请日:2020-09-25

    Applicant: Neste Oyj

    Abstract: Herein is provided a process for producing renewable products, such as alkenes, from a feedstock of biological origin. The process includes subjecting a feedstock including fatty acid glycerides and optionally free fatty acids, wherein at least one hydrocarbon chain is unsaturated, to esterification reaction in the presence of an alcohol. The ester stream thereby obtained is then fractionated and a fraction including esters of unsaturated C18 fatty acids is subjected to metathesis conditions in the presence of an alkene to obtain metathesis products. Fractionation of the metathesis products includes recovery of at least renewable 1-decene, and unsaturated C10-C15 fatty acid esters.

    FRAGRANCE OR FLAVOUR MIXTURE
    7.
    发明申请

    公开(公告)号:US20220228085A1

    公开(公告)日:2022-07-21

    申请号:US17611886

    申请日:2019-05-17

    Applicant: SYMRISE AG

    Abstract: Fragrance or flavour mixtures containing (i) (E)-2-methyl-but-2-endicarboxylic acid diesters, (ii) (Z)-2-methyl-but-2-endicarboxylic acid diesters and (iii) 2-methylenebutanedicarboxylic acid diesters with a fruity, pear-like note are provided. Further provided are a process for the preparation of these fragrances or flavourings or fragrance or flavouring mixtures, and the use of the fragrance or flavouring mixtures to produce a fruity, pear-like fragrance or flavour or for the preparation of a fragrance mixture or a perfume oil, cosmetic agent, application agent, detergent and cleaning agent, foodstuff, animal feed or pharmaceutical product, as well as the products made therefrom which contain the fragrance or flavouring mixtures in a sensory effective amount.

    Methods of making organic compounds by metathesis

    公开(公告)号:US10906861B2

    公开(公告)日:2021-02-02

    申请号:US14678749

    申请日:2015-04-03

    Abstract: Described are methods of making organic compounds by metathesis chemistry. The methods of the invention are particularly useful for making industrially-important organic compounds beginning with starting compositions derived from renewable feedstocks, such as natural oils. The methods make use of a cross-metathesis step with an olefin compound to produce functionalized alkene intermediates having a pre-determined double bond position. Once isolated, the functionalized alkene intermediate can be self-metathesized or cross-metathesized (e.g., with a second functionalized alkene) to produce the desired organic compound or a precursor thereto. The method may be used to make bifunctional organic compounds, such as diacids, diesters, dicarboxylate salts, acid/esters, acid/amines, acid/alcohols, acid/aldehydes, acid/ketones, acid/halides, acid/nitriles, ester/amines, ester/alcohols, ester/aldehydes, ester/ketones, ester/halides, ester/nitriles, and the like.

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