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1.发明申请公开(公告)号：US20190194391A1
公开(公告)日：2019-06-27
申请号：US16225275
申请日：2018-12-19
发明人： Daisuke KORI , Seiichiro TACHIBANA , Tsutomu OGIHARA , Satoru KITANO , Yukio ABE , Fumihiro HATAKEYAMA , Taiki KOBAYASHI
CPC分类号： C08G65/34 , B01D15/08 , B01D2257/30 , B01J20/08 , C07C37/82 , C07C39/14 , C08G8/04 , C08G8/20 , G03F7/091 , G03F7/094
摘要： The invention provides: a dihydroxynaphthalene condensate which suppresses soft particle generation and is suitably usable for a composition excellent in filterability; and a method for producing the dihydroxynaphthalene condensate, in the method for producing a dihydroxynaphthalene condensate, dihydroxynaphthalene to be used has a sulfur element content of 100 ppm or less in terms of mass among constituent elements. The dihydroxynaphthalene and a condensation agent are condensed in presence of an acid or a base to produce the dihydroxynaphthalene condensate.
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公开(公告)号：US20190194102A1
公开(公告)日：2019-06-27
申请号：US16225224
申请日：2018-12-19
发明人： Seiichiro TACHIBANA , Daisuke KORI , Tsutomu OGIHARA , Satoru KITANO , Yukio ABE , Fumihiro HATAKEYAMA , Taiki KOBAYASHI
摘要： The invention provides a method for purifying dihydroxynaphthalene, which is capable of suppressing soft particle generation and obtaining dihydroxynaphthalene serving as a raw material of a resin and composition excellent in filterability. The method for purifying dihydroxynaphthalene includes the step of removing a sulfur content in the dihydroxynaphthalene with an adsorbent, and neutral alumina is used as the adsorbent.
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