发明名称 |
PROCESS FOR THE PRODUCTION OF TOCOPHEROL AND TOCOPHEROL/TOCOTRIENOL CONCENTRATES |
摘要 |
This invention relates to a process for recycling waste material selected from amino-carboxylic acid oligomers or polymers and amido-carboxylic acid oligomers or polymers into amido-carboxylic acids. A mixture containing water, an oligomeric or polymeric waste material, and a carboxylic acid is heated. The mixture is cooled to obtain a two phase system containing an aqueous phase and an organic phase which are separated. Carboxylic acids, unreacted starting materials, and the monomeric amido-carboxylic acid product are distilled from the organic phase. The remaining solid residue composed of high boiling oligomeric amino-carboxylic acids is recycled into Step (A). |
申请公布号 |
HUT77799(A) |
申请公布日期 |
1998.08.28 |
申请号 |
HU19980000912 |
申请日期 |
1995.11.07 |
申请人 |
EASTMAN CHEMICAL COMPANY |
发明人 |
BARNICKI,SCOTT DONALD;SUMNER,CHARLES EDWAN;WILLIAMS,HAMPTON LOYD CHIP III. |
分类号 |
C08J11/00;C07C231/02;C07C233/47;C08G69/16;C08G69/46;C08J11/10 |
主分类号 |
C08J11/00 |
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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