Novel proton type beta zeolite, preparation method thereof and process for preparing phenol compound using the same
申请人:UBE INDUSTRIES, LTD.
公开号:US20040242938A1
公开(公告)日:2004-12-02
Disclosed are a proton type &bgr; zeolite in which an acid site showing a desorption peak with a range of ±100° C. with a center of 330° C. exists in a spectrum measured by the ammonia temperature programmed desorption method (NH
3
-TPD), and an amount of a strong acid site showing a desorption peak of 500° C. or higher is controlled to 2.5 &mgr;mol/g or less, a method for preparing the same, and a process for preparing a phenol compound by oxidizing a benzene compound with a peroxide in the presence of the proton type &bgr; zeolite.
STANKEVICH A. I.; ZYATKOV I. P.; LAZAREVA A. M.; ELNITSKIJ A. P., ZH. ORGAN. XIMII, 1980, 16, HO 9, 1823-1829
作者:STANKEVICH A. I.、 ZYATKOV I. P.、 LAZAREVA A. M.、 ELNITSKIJ A. P.
DOI:——
日期:——
MODIFIED HYDROGENATED POLYSILOXAZANE, COMPOSITION COMPRISING SAME FOR FORMING SILICA-BASED INSULATION LAYER, METHOD FOR PREPARING COMPOSITION FOR FORMING SILICA-BASED INSULATION LAYER, SILICA-BASED INSULATION LAYER, AND METHOD FOR PREPARING SILICA-BASED INSULATION LAYER
申请人:CHEIL INDUSTRIES INC.
公开号:US20150225508A1
公开(公告)日:2015-08-13
Disclosed is modified hydrogenated polysiloxazane prepared by reacting hydrogenated polysiloxazane with a silane compound selected from polysilane, polycyclosilane, and a silane oligomer. The modified hydrogenated polysiloxazane has a small mole ratio of nitrogen atoms relative to silicon atoms and may remarkably deteriorate a film shrinkage ratio when included in a composition for forming a silica-based insulation layer to form a silica-based insulation layer.