公开(公告)号：US20230159443A1

公开(公告)日：2023-05-25

申请号：US17799156

申请日：2021-02-08

申请人： SUMITOMO SEIKA CHEMICALS CO., LTD.

发明人： Yusaku MASUHARA ,  Seiya ASHIBE

IPC分类号： C07C303/06

CPC分类号： C07C303/06

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 sulfur trioxide in the presence of at least one member selected from the group consisting of a sulfoxide compound and sulfone compound having a specific structure to thereby obtain an alkanedisulfonic acid compound.

公开(公告)号：US20230150967A1

公开(公告)日：2023-05-18

申请号：US17798637

申请日：2021-02-08

申请人： SUMITOMO SEIKA CHEMICALS CO., LTD.

发明人： Seiya ASHIBE ,  Hirotake MORIYAMA

IPC分类号： C07D327/00

CPC分类号： C07D327/00

摘要： Provided is an industrially advantageous method for producing a methylene disulfonate compound easily and inexpensively using fewer raw materials. The method for producing a methylene disulfonate compound of the present invention comprises step A of reacting at least one alkanesulfonic acid compound and sulfur trioxide in the presence of at least one member selected from the group consisting of a sulfoxide compound and a sulfone compound to thereby obtain reactant A comprising an alkanedisulfonic acid compound, and step B of reacting reactant A obtained in step A and a formaldehyde compound in the presence of sulfur trioxide to thereby obtain a methylene disulfonate compound.

公开(公告)号：US20220251059A1

公开(公告)日：2022-08-11

申请号：US17629167

申请日：2020-07-22

申请人： SUMITOMO SEIKA CHEMICALS CO., LTD.

发明人： Seiya ASHIBE ,  Seiji BANDO ,  Yusaku MASUHARA

IPC分类号： C07D327/00

摘要： Provided is a novel production method capable of easily producing a methylene disulfonate compound. The method for producing a methylene disulfonate compound comprises reacting a specific sulfonic acid compound with a formaldehyde compound in the presence of sulfur trioxide.

公开(公告)号：US20220251060A1

公开(公告)日：2022-08-11

申请号：US17629186

申请日：2020-07-22

申请人： SUMITOMO SEIKA CHEMICALS CO., LTD.

发明人： Seiji BANDO ,  Hirotake MORIYAMA ,  Seiya ASHIBE

IPC分类号： C07D327/10 ,  C07D327/00

摘要： Provided is a novel production method capable of easily producing a cyclic disulfonic acid ester compound. This method for producing a cyclic disulfonic acid ester compound comprises reacting a specific sulfonic acid compound with a specific sulfuric acid ester compound.