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    COMPOUNDS, PROCESSES, AND MACHINERY FOR CONVERTING METHANE GAS INTO METHANE SULFONIC ACID
    4.
    发明公开
    COMPOUNDS, PROCESSES, AND MACHINERY FOR CONVERTING METHANE GAS INTO METHANE SULFONIC ACID 审中-公开

    公开(公告)号：EP4159715A1

    公开(公告)日：2023-04-05

    申请号：EP22205418.1

    申请日：2019-04-25

    申请人： Veolia North America Regeneration Services, LLC

    发明人： RICHARDS, Alan, K

    IPC分类号： C07C303/06 ,  C07C309/04 ,  C07C407/00 ,  C07C409/44

    摘要： Improved initiators, solvents, and processing equipment and methods are disclosed for improving the yields and efficiency of a manufacturing process which uses a radical chain reaction to convert methane (CH4), which is a gas under any normal conditions, into methane sulfonic acid (MSA), a liquid. MSA is useful and valuable in its own right, and it also can be processed to create desulfured fuels and other valuable chemicals. A preferred type of initiator combination has been identified, comprising at least two different peroxide sulfate compounds. One will act as a "primary" initiator for the chain reaction, while the other will act as a "chain-lengthening oxidant", which can eliminate chain-terminating species, such as sulfur DI-oxide, in the MSA-forming reactor. Integrated continuous-loop processing systems also are disclosed, including a first variant which uses a mixture of sulfuric acid and MSA as the solvent, and a second variant which completely avoids sulfuric acid and uses MSA only, as the solvent. Options are also disclosed which can avoid any need for distillation, to create reduced-cost "rough grades" of MSA with purity levels which will be entirely adequate for various types of uses in bulk.

    METHOD FOR PRODUCING ALKANE DISULFONIC ACID COMPOUND
    5.
    发明公开
    METHOD FOR PRODUCING ALKANE DISULFONIC ACID COMPOUND 审中-公开

    公开(公告)号：EP4105199A1

    公开(公告)日：2022-12-21

    申请号：EP21753651.5

    申请日：2021-02-08

    申请人： Sumitomo Seika Chemicals Co., Ltd.

    发明人： MORIYAMA, Hirotake ,  MASUHARA, Yusaku

    IPC分类号： C07C303/06 ,  C07C309/05

    摘要： Provided is an industrially advantageous method for producing an alkanedisulfonic acid compound easily and inexpensively with a high yield. The present invention is a method for producing an alkanedisulfonic acid compound comprising reacting at least one alkanesulfonic acid compound having a specific structure and at least one complex having a Lewis base and sulfur trioxide to thereby obtain an alkanedisulfonic acid compound. According to the production method of the present invention, it is possible to produce an alkanedisulfonic acid compound easily and inexpensively with a high yield, which is industrially advantageous.