| 发明名称 |
Process for the reduction of the polymer portion in the dimerization of ketene |
| 摘要 |
The polymer portion in the production of diketene by the dimerization of ketene obtained from acetic acid by pyrolysis is reduced by the addition of sulfur dioxide to the ketene gas or to the reaction medium.
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| 申请公布号 |
US4999438(A) |
申请公布日期 |
1991.03.12 |
| 申请号 |
US19900460659 |
申请日期 |
1990.01.03 |
| 申请人 |
LONZA LTD. |
发明人 |
BERGMIN, RENZO;QUITTMANN, WILHELM;STOFFEL, JOSEF |
| 分类号 |
C07D305/12;C07B61/00;C07C45/68;C07C45/88;C07C45/89;C07C45/90;C07C49/88;C07D315/00 |
主分类号 |
C07D305/12 |
| 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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