发明授权
- 专利标题： Process for preparing bisphenol A of good heat stability
- 专利标题（中）： 制备双酚A具有良好的热稳定性的方法
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申请号： US45206申请日： 1993-04-13
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公开(公告)号： US5300699A公开(公告)日： 1994-04-05
- 发明人: Toshihiko Furukawa , Katsuhiko Sakura , Kiyoshi Hashimoto , Nobuaki Egashira , Nobuo Moriya , Sachio Asaoka , Nobuyuki Suda , Susumu Yamamoto
- 申请人： Toshihiko Furukawa , Katsuhiko Sakura , Kiyoshi Hashimoto , Nobuaki Egashira , Nobuo Moriya , Sachio Asaoka , Nobuyuki Suda , Susumu Yamamoto
- 申请人地址： JPX Tokyo JPX Yokohama
- 专利权人： Nippon Steel Chemical Co., Ltd.,Chiyoda Corp.
- 当前专利权人： Nippon Steel Chemical Co., Ltd.,Chiyoda Corp.
- 当前专利权人地址： JPX Tokyo JPX Yokohama
- 优先权： JPX4-126773 19920420; JPX4-283477 19920930
- 主分类号： C07C37/70
- IPC分类号： C07C37/70 ; C07C39/16 ; C08G64/14
摘要：
This invention relates to a process for preparing bisphenol A of good heat stability by heat-treating bisphenol A containing a very small amount of impurities in a molten state at 185.degree. to 220.degree. C. for 5 to 60 minutes in an oxygen-free atmosphere and the process yields bisphenol A of good heat stability which shows reduced coloration when heated. Bisphenol A prepared by this process has excellent properties relating to color and is particularly suitable as raw material for the manufacture of polycarbonates where the requirement for color is strict.
公开/授权文献
- US5893327A Inking unit for a rotary printing press 公开/授权日：1999-04-13