Invention Patent
- Patent Title: PREPARATION OF PHTHALIC ANHYDRIDE FROM O-XYLENE
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Application No.: CA2040981Application Date: 1991-04-23
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Publication No.: CA2040981A1Publication Date: 1991-10-25
- Inventor: AICHINGER HEINRICH , RUPPEL WILHELM , SEUBERT ROLF , BOEHNING KARL-HEINZ , SCHEIDMEIR WALTER , SCHMIDT JOHANNES E , SCHWARZMANN MATTHIAS
- Applicant: AICHINGER HEINRICH , RUPPEL WILHELM , SEUBERT ROLF , BOEHNING KARL HEINZ , SCHEIDMEIR WALTER , SCHMIDT JOHANNES E , SCHWARZMANN MATTHIAS
- Assignee: AICHINGER HEINRICH,RUPPEL WILHELM,SEUBERT ROLF,BOEHNING KARL HEINZ,SCHEIDMEIR WALTER,SCHMIDT JOHANNES E,SCHWARZMANN MATTHIAS
- Current Assignee: AICHINGER HEINRICH,RUPPEL WILHELM,SEUBERT ROLF,BOEHNING KARL HEINZ,SCHEIDMEIR WALTER,SCHMIDT JOHANNES E,SCHWARZMANN MATTHIAS
- Priority: DE4013051 1990-04-24
- Main IPC: B01J23/18
- IPC: B01J23/18 ; B01J8/02 ; B01J23/22 ; B01J27/198 ; C07B61/00 ; C07C51/265 ; C07D307/89
Abstract:
BASFAKTIENQESELLSCHAFT O.Z.0050/41580 Preparation of phthalic anhydride from o-xylene of the disclosure: Phthalic anhydride is prepared in a multiple tube reactor provided withseparate salt baths, the temperature of the salt bath used for cooling the first layer of catalyst, as regarded in the direction of flow of the reaction mixture, being from 2.degree. to 20.degree.C higher than that of the salt bath(s) associated with the following layer(s).
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