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    PROCESS FOR METHYL METHACRYLATE PRODUCTION FROM ETHANOL
    4.
    发明申请
    PROCESS FOR METHYL METHACRYLATE PRODUCTION FROM ETHANOL 有权

    公开(公告)号：US20240400493A1

    公开(公告)日：2024-12-05

    申请号：US18698828

    申请日：2022-10-05

    Applicant: Rohm and Haas Company

    Inventor： Kirk W. Limbach ,  Reetam Chakrabarti

    IPC: C07C67/39 ,  B01J23/52 ,  C07C1/24 ,  C07C45/50 ,  C07C45/75

    Abstract: A process for producing methyl methacrylate is disclosed, the method comprising: a) producing ethylene from ethanol; b) producing propionaldehyde from the ethylene produced in step a); c) producing methacrolein from propionaldehyde produced in step b) and formaldehyde; and d) producing methyl methacrylate in an oxidative esterification reaction from the methacrolein produced in step c) with methanol. Step c) is performed at a pressure above 1 bar. Step d) is performed in a reactor system in a liquid phase reaction in the presence of a heterogeneous noble metal-containing catalyst, wherein the reactor system comprises an oxygen-containing gas. An average concentration of methacrolein in step d) is less than 40 wt % based on the total weight of methanol and methacrolein. The reactor system of step d) has an average ratio of methanol to methacrolein less than 20:1 based on an average amount of methanol and methacrolein entering and exiting the system.

    PROCESS FOR ALKYL METHACRYLATE PRODUCTION
    6.
    发明申请
    PROCESS FOR ALKYL METHACRYLATE PRODUCTION 有权

    公开(公告)号：US20240400494A1

    公开(公告)日：2024-12-05

    申请号：US18698830

    申请日：2022-10-05

    Applicant: Rohm and Haas Company

    Inventor： Reetam Chakrabarti ,  Kirk W. Limbach

    IPC: C07C67/39 ,  B01J23/52 ,  C07C45/75

    Abstract: A process for the production of an alkyl methacrylate is disclosed, the method comprising: a) producing methacrolein from propionaldehyde and formaldehyde; and b) reacting the methacrolein in an oxidative esterification reaction to obtain the alkyl methacrylate. Reacting the methacrolein in an oxidative esterification reaction comprises introducing a reaction mixture comprising the methacrolein, an alkyl alcohol, and an oxygen-containing gas to a reactor system comprising a heterogeneous noble metal-containing catalyst. An average concentration of methacrolein in step b) is less than 40 wt % based on the total weight of alkyl alcohol and methacrolein. The reactor system of step d) has an average ratio of alkyl alcohol to methacrolein less than 20:1 based on an average amount of alkyl alcohol and methacrolein entering and exiting the system. A liquid phase stream exiting the reactor system contains at least 30 wt % alcohol based on the total weight of the liquid phase stream. The liquid phase stream exiting the reactor system contains less than 30 wt % methacrolein based on the total weight of the liquid phase stream. The liquid phase stream exiting the reactor system comprises greater than 0.1 ppm and less than 5000 ppm of an alkyl isobutyrate. A gas phase stream exiting the reactor system comprises between 1 mol % and 7.5 mol % oxygen based on the total amount of the gas phase stream. The alkyl alcohol is a straight or branched alcohol comprising from 1 to 12 carbon atoms.

    PROCESS FOR METHYL METHACRYLATE PRODUCTION
    7.
    发明申请
    PROCESS FOR METHYL METHACRYLATE PRODUCTION 有权

    公开(公告)号：US20240400492A1

    公开(公告)日：2024-12-05

    申请号：US18695395

    申请日：2022-10-05

    Applicant: Rohm and Haas Company

    Inventor： Kirk W. Limbach ,  Reetam Chakrabarti

    IPC: C07C67/39 ,  B01J23/52 ,  C07C45/75

    Abstract: A process for the production of methyl methacrylate is disclosed, the method comprising: a) producing methacrolein from propionaldehyde and formaldehyde; and b) reacting the methacrolein in an oxidative esterification reaction to obtain methyl methacrylate. Reacting the methacrolein in an oxidative esterification reaction comprises introducing a reaction mixture comprising the methacrolein, methanol, and an oxygen-containing gas to a reactor system comprising a heterogeneous noble metal-containing catalyst. A liquid phase stream exiting the reactor system contains at least 30 wt % methanol based on the total weight of the liquid phase stream. The liquid phase stream exiting the reactor system contains less than 30 wt % methacrolein based on the total weight of the liquid phase stream. The liquid phase stream exiting the reactor system comprises greater than 0.1 ppm and less than 5000 ppm methyl isobutyrate. A gas phase stream exiting the reactor system comprises between 1 mol % and 7.5 mol % oxygen based on the total amount of the gas phase stream.

    INTEGRATED CARBOXYLIC ACID PRODUCTION FROM SYNTHESIS GAS
    8.
    发明公开
    INTEGRATED CARBOXYLIC ACID PRODUCTION FROM SYNTHESIS GAS 审中-公开

    公开(公告)号：US20240010596A1

    公开(公告)日：2024-01-11

    申请号：US18253605

    申请日：2021-11-17

    Applicant: Rohm and Haas Company

    Inventor： Joseph F. Dewilde ,  Kirk W. Limbach ,  Reetam Chakrabarti

    IPC: C07C51/225 ,  C07C51/64

    CPC classification number: C07C51/225 ,  C07C51/64 ,  C07C2521/06 ,  C07C2523/08 ,  C07C2529/85

    Abstract: A process for preparing C2 to C4 carboxylic acids from synthesis gas includes introducing a feed stream comprising hydrogen gas and a carbon-containing gas comprising carbon monoxide into a reaction zone of a first reactor, converting the feed stream into an intermediate stream comprising C2 to C4 hydrocarbons in the reaction zone in the presence of a first catalyst, wherein the intermediate stream further comprises carbon dioxide and wherein the first catalyst is a composite catalyst comprising a metal oxide catalyst component and a microporous catalyst component, and converting the intermediate stream into a product stream comprising C2 to C4 carboxylic acids in the presence of a second catalyst in a second reactor. The second reactor can be configured for olefin oxidation or paraffin oxidation.

    INTERGRATED PROCESS TO PRODUCE ALDEHYDES FROM METHANOL
    9.
    发明公开
    INTERGRATED PROCESS TO PRODUCE ALDEHYDES FROM METHANOL 审中-公开

    公开(公告)号：US20240010591A1

    公开(公告)日：2024-01-11

    申请号：US18251627

    申请日：2021-11-17

    Applicant: Rohm and Haas Company

    Inventor： Joseph F. Dewilde ,  Kirk W. Limbach ,  Reetam Chakrabarti

    IPC: C07C45/50 ,  C07C45/78 ,  C07C67/44 ,  C07C1/24

    CPC classification number: C07C45/50 ,  C07C45/78 ,  C07C67/44 ,  C07C1/24

    Abstract: A process for preparing aldehydes from methanol includes introducing a feed stream comprising methanol and hydrogen gas into a reaction zone of a first reactor, converting the feed stream into an intermediate stream comprising C2 to C4 olefins in the reaction zone in the presence of a first catalyst, wherein the first catalyst is a microporous catalyst component, removing water and species C4 and heavier from the intermediate stream to form a lights stream, and converting the lights stream into a product stream comprising propionaldehyde in the presence of a second catalyst and carbon monoxide in a second reactor. The propionaldehyde can further be converted to methyl methacrylate via oxidative esterification.

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