公开(公告)号：US4758283A

公开(公告)日：1988-07-19

申请号：US945073

申请日：1986-12-22

申请人： Motohiro Takemura ,  Mochihiro Iljima ,  Yoshiaki Tateno ,  Naoki Okamoto ,  Masaaki Fuse

发明人： Motohiro Takemura ,  Mochihiro Iljima ,  Yoshiaki Tateno ,  Naoki Okamoto ,  Masaaki Fuse

IPC分类号： C07H3/08 ,  C07H1/08 ,  C07H3/02 ,  C12P19/02 ,  C13K13/00 ,  C13K1/00 ,  C13D1/00 ,  C13D1/14 ,  C13J1/06

CPC分类号： C13K13/00 ,  C07H3/02 ,  C12P19/02

摘要： This invention relates to a process for readily and efficiently preparing L-rhamnose with the use of a marine alga belonging to the family Monostromaceae, Ulvales.According to the process of the present invention, rhamnan sulfate is extracted from a marine alga belonging to the family Monostromaceae such as Monostroma nitidium Wittrock and the obtained extract is hydrolyzed by adding acid(s) thereto followed by heating or treating thereof with a cation exchange resin followed by heating to thereby give a solution containing free L-rhamnose.Since the solution thus obtained contains a large amount of salts, the removal of these salts is significantly important in the preparation of L-rhamnose. In the present invention, an effective process therefor is combined with a conventional method by using an ion exchange resin to thereby establish an efficient desalting process.Further it is effective to elevate the purity of L-rhamnose by adding baker's yeast, which selectively ferments various sugars, to the solution containing L-rhamnose.