公开(公告)号：JPS6360944A

公开(公告)日：1988-03-17

申请号：JP20532986

申请日：1986-09-01

Applicant: DAICEL CHEM

Inventor： HIGUCHI TAKAMASA ,  TANAHASHI MITSUHIKO ,  SHIBATA TORU

IPC: C07B57/00 ,  C07D307/00 ,  C07D307/32 ,  C07D307/33 ,  C07D307/80 ,  C07D317/00 ,  C07D407/04 ,  C07D493/04 ,  C07G1/00 ,  C08H7/00

Abstract: PURPOSE:To easily carry out optical resolution of the titled compound useful as pharmaceuticals, agricultural chemicals, etc., in high purity at a low cost on an industrial scale, by using an adsorbent composed mainly of a chemically stable polysaccharide ester which is available abundantly at a low cost. CONSTITUTION:A mixture of optical isomers of lignans is subjected to optical resolution by a chromatography such as gas chromatography, liquid chromatography, thin film chromatography, etc., using an adsorbent containing a polysaccharide derivative as an active component. The polysaccharide or its derivative is used in the form filled in a column as it is, supported on a carrier or coated on a capillary column in the case of liquid chromatography or gas chromatography. The particle size of the polysaccharide or its derivative is preferably 1mum-10mm. The most effective adsorbent is e.g. cellulose trisphenyl carbamate, etc.

公开(公告)号：JP2579621B2

公开(公告)日：1997-02-05

申请号：JP20532986

申请日：1986-09-01

Applicant: DAICEL CHEM

Inventor： HIGUCHI TAKAMASA ,  TANAHASHI MITSUHIKO ,  SHIBATA TOORU

IPC: C07B57/00 ,  C07D307/00 ,  C07D307/32 ,  C07D307/33 ,  C07D307/80 ,  C07D317/00 ,  C07D407/04 ,  C07D493/04 ,  C07G1/00 ,  C08H7/00

公开(公告)号：JPS6284101A

公开(公告)日：1987-04-17

申请号：JP22268785

申请日：1985-10-08

Applicant: DAICEL CHEM

Inventor： HIGUCHI TAKAMASA ,  TANAHASHI MITSUHIKO ,  SAKA SHIRO ,  FUNAKI KATSUNORI ,  ISHITANI KAZUKI ,  NAKAMURA HIROYUKI

IPC: C08B1/00

Abstract: PURPOSE:To effectively remove hemicellulose, etc., which are impurities and produce pulp of high cellulose purity, by blasting pulp obtained from a lignocellulosic material. CONSTITUTION:Pulp with >=80% cellulosic content obtained from a lignocellulosic material, preferably bleached pulp is refined by blasting. The blasting is carried out by, e.g. steaming raw material pulp in a pressure-resistant vessel with steam at a high temperature (100-300 deg.C) under a high pressure (5-200kg/cm ) in a short time (10sec-1hr), preferably at about 220 deg.C under 30kg/cm for several minutes, rapidly releasing the steamed material into the air under reduced pressure and subsequently extracting the resultant material with water and an organic solvent, e.g. dioxane.