发明名称 |
Method for purifying dimethyl sulphoxide (DMSO) |
摘要 |
PCT No. PCT/FR96/01806 Sec. 371 Date May 12, 1998 Sec. 102(e) Date May 12, 1998 PCT Filed Nov. 15, 1996 PCT Pub. No. WO97/19057 PCT Pub. Date May 29, 1997This process consists in placing liquid DMSO with a low water content in contact with an ion exchange resin in -SO3H form, and then in separating the liquid from the resin. The DMSO thus obtained has a content of iron cation tracer element of less than or equal to 1 ppb and a content of Na cation tracer element of less than or equal to 2 ppb.
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申请公布号 |
US5990356(A) |
申请公布日期 |
1999.11.23 |
申请号 |
US19980068504 |
申请日期 |
1998.05.12 |
申请人 |
ELF ACQUITAINE PRODUCTION |
发明人 |
COMMARIEU, ANNIE;BAZIN, ISABELLE |
分类号 |
C07C315/06;C07C317/04;(IPC1-7):C07C315/06 |
主分类号 |
C07C315/06 |
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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