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公开(公告)号：US20210371365A1
公开(公告)日：2021-12-02
申请号：US17288309
申请日：2019-11-13
发明人： Johan Vanden Eynde , Kristof Heylen , Anja Ehrig , Lars Frye
摘要： The present inventions relates to the preparation of 3,3,5-trimethylcyclohexylidene bisphenol. Especially, the present invention relates to the preparation of 3,3,5-trimethylcyclohexylidene bisphenol from 3,3,5-trimethylcyclohexanone and phenol in the presence of a gaseous acidic catalyst. The preparation comprises a first drying step and a second drying step wherein in the second drying step the temperature is increased in comparison to first drying step or in the second drying step the pressure is lowered in comparison to first drying step, or in second drying step both the temperature is increased and the pressure is lowered in comparison to the first drying step (d1).
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公开(公告)号：US11225451B2
公开(公告)日：2022-01-18
申请号：US17288309
申请日：2019-11-13
发明人： Johan Vanden Eynde , Kristof Heylen , Anja Ehrig , Lars Frye
摘要： The present inventions relates to the preparation of 3,3,5-trimethylcyclohexylidene bisphenol. Especially, the present invention relates to the preparation of 3,3,5-trimethylcyclohexylidene bisphenol from 3,3,5-trimethylcyclohexanone and phenol in the presence of a gaseous acidic catalyst. The preparation comprises a first drying step and a second drying step wherein in the second drying step the temperature is increased in comparison to first drying step or in the second drying step the pressure is lowered in comparison to first drying step, or in second drying step both the temperature is increased and the pressure is lowered in comparison to the first drying step (d1).
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