发明名称 |
METHOD FOR PRODUCTION OF DIMETHYL SULFONE BY OXIDATION OF A METHANOL BASED MEDIUM OBTAINED FROM A SULFATE CELLULOSE PROCESS |
摘要 |
The invention relates to a method for making dimethyl sulfone. According to the invention, dimethyl sulfone is manufactured by oxidation from dimethyl sulfide in a methanol-based medium. Methanol is removed during and/or after the oxidation by distillation, water vapor distillation or evaporation, and finally dimethyl sulfone is crystallized from a water-based solution phase. The starting material for the production process can be a liquefied fraction obtained from a sulfate pulp process, the fraction containing methanol and dimethyl sulfide, whereby the process produces not only dimethyl sulfone but also purified methanol. The invention covers also the use of dimethyl sulfone, produced according to the method, in an orally ingested health formulation or in an externally used therapeutic formulation, such as a skin cream. |
申请公布号 |
EP2670909(A4) |
申请公布日期 |
2016.05.11 |
申请号 |
EP20120742600 |
申请日期 |
2012.02.02 |
申请人 |
STORA ENSO OYJ |
发明人 |
RÄSÄNEN, TIINA;VILJAMAA, KATJA;ISOAHO, JUKKA PEKKA;ALÉN, RAIMO;PAKKANEN, HANNU |
分类号 |
D21C11/14;C07C315/02;C07C317/04;D21C11/00 |
主分类号 |
D21C11/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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