发明授权
- 专利标题: Process for the preparation of aromatic dicarboxylic acid dichlorides
- 专利标题(中): 芳族二羧酸二氯化物的制备方法
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申请号: US280898申请日: 1981-07-06
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公开(公告)号: US4393009A公开(公告)日: 1983-07-12
- 发明人: Dieter Freitag , Ludwig Bottenbruch , Claus Wulff
- 申请人: Dieter Freitag , Ludwig Bottenbruch , Claus Wulff
- 申请人地址: DEX Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DEX Leverkusen
- 优先权: DEX2926736 19790703
- 主分类号: C07C63/15
- IPC分类号: C07C63/15 ; B01J31/00 ; B01J31/02 ; C07B61/00 ; C07C51/00 ; C07C51/60 ; C07C63/33 ; C07C65/21 ; C07C67/00 ; C07C313/00 ; C07C323/62
摘要:
Process for the preparation of pure aromatic dicarboxylic acid dichlorides which comprises reacting an aromatic dicarboxylic acid or an aromatic dicarboxylic acid mixture with phosgen in one stage and in the presence of an N--C.sub.1 --C.sub.6 -alkyl-pyrrolidine, -piperidine or -morpholine as a catalyst and optionally in a solvent or diluent.
公开/授权文献
- US5509784A Turbine bucket and wheel assembly with integral bucket shroud 公开/授权日:1996-04-23
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