| abstract |
The object of the present invention is to provide and a kind ofly do not rely on the crystal habit of polyose, the solvent that polyose can be dissolved at short notice equably, the manufacture method of formed body using this solvent and the manufacture method of polysaccharide derivatives.Use containing the tetraalkyl ammonium acetate shown in following formula and aprotic polar solvent and this aprotic polar solvent containing proportional be more than 35 % by weight solvent.In following formula, Rn 1 , Rn 2 , Rn 3 and Rn 4 separately represent that carbonatoms is the alkyl of 3 ~ 6. |