会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 76. 发明专利
    • PURIFICATION OF BROMINE COMPOUND
    • JPH11193257A
    • 1999-07-21
    • JP30522198
    • 1998-10-27
    • TEIJIN CHEMICALS LTD
    • TAKEYA YUTAKAHOSHIMI HARUHISAMUKAI AKIHIRO
    • C07C41/40C07C43/225C07C45/81C07C49/84C07C315/06C07C317/22
    • PROBLEM TO BE SOLVED: To obtain a high-purity bromine compound excellent in thermal stability, by adding and mixing a crude solution of a bromine compound with a solid liquid mixture substance composed of a good solvent, a poor solvent and a seed crystal. SOLUTION: When a bromine compound represented by the formula [Ar and Ar are each a 6-10C aromatic hydrocarbon; Y is a 1-3C alkylene, sulfone or the like; R and R are each a 2-5C hydrocarbon; (m) and (n) are each 1-4; (p) and (q) are each 2 or 4] is crystallized from a crude solution thereof, the crude solution containing the compound represented by the formula at 5-95 wt.% concentration is added to a crystallization vessel containing a solid liquid mixture substance composed of a good solvent (preferably methylene chloride), a poor solvent (preferably methanol) and a seed crystal and mixed therewith. The ratio of the compound represented by the formula in a slurry composed of the poor solvent, good solvent and the crystal (the seed crystal and the deposited crystal) of the compound represented by the formula is 10-50 wt.%. 2,2-Bis[(3,5-dibromo-4-(2,3-dibromopropyloxy)}phenyl]propane is preferred as the compound represented by the formula.