发明授权
- 专利标题: Purification of terephthalic acid
- 专利标题(中): 对苯二甲酸的纯化
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申请号: US745620申请日: 1985-06-17
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公开(公告)号: US4626598A公开(公告)日: 1986-12-02
- 发明人: Lawrence G. Packer , David E. James
- 申请人: Lawrence G. Packer , David E. James
- 申请人地址: IL Chicago
- 专利权人: Amoco Corporation
- 当前专利权人: Amoco Corporation
- 当前专利权人地址: IL Chicago
- 主分类号: C07C63/26
- IPC分类号: C07C63/26 ; C07C51/00 ; C07C51/487 ; C07C67/00 ; C07C51/42
摘要:
An improved method for producing purified terephthalic acid by catalytic hydrogenation is disclosed. Control of the reduction of colored compounds during the production of purified terephthalic acid is effected by modulating solution hydrogen concentration during hydrogenation.
公开/授权文献
- US4093297A Grasping device 公开/授权日:1978-06-06
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