发明名称 |
Methods for preparing dibasic acids |
摘要 |
This invention relates to methods of preparing dibasic acids, such as adipic acid for example, by oxidizing a hydrocarbon with a gas containing an oxidant, preferably oxygen. A respective hydrocarbon is reacted with a gaseous oxidant to form dibasic acid in a mixture which preferably contains a solvent, a catalyst, and an initiator. The temperature of the mixture is then lowered to a point at which solid dibasic acid is precipitated, while maintaining a single liquid phase. At least part of the formed acid is then removed. The lowering of the temperature is preferably performed at least partially by an operation selected from a group consisting of (a) evaporating at least part of the hydrocarbon or otherwise adjusting the hydrocarbon content of the mixture (b) lowering the pressure (c) adding matter having a temperature lower than the initial temperature (d) removing heat by external means (e) removing a first amount of heat by any suitable means, and adding a second amount of heat by external means, the first amount of heat being greater than the second amount of heat, and (f) a combination thereof.
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申请公布号 |
US5922908(A) |
申请公布日期 |
1999.07.13 |
申请号 |
US19970824992 |
申请日期 |
1997.03.27 |
申请人 |
TWENTY-FIRST CENTURY RESEARCH CORPORATION |
发明人 |
DASSEL, MARK WILLIAM;DECOSTER, DAVID COLE;ROSTAMI, ADER MEHERBAN;ALDRICH, SHARON MARIE;VASSILIOU, EUSTATHIOS |
分类号 |
B01D3/34;B01J10/00;B01J19/00;B01J19/18;B01J19/26;C07C51/265;C07C51/31;C07C51/42;(IPC1-7):C07C51/31;C07C51/16 |
主分类号 |
B01D3/34 |
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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