Abstract: A polysaccharide derivative prepared by replacing a part or the whole of hydrogen atoms of hydroxyl and/or amino groups of a polysaccharide with one or more atomic groups represented by the following formula (1), (2) or (3) is new and useful for the separation of optical isomers: ##STR1## wherein the number of carbon atoms constituting R is 1 to 30 and R is a group having at least one asymmetric center.

Abstract: A separation agent essentially comprises an aliphatic or aromatic ester of a polysaccharide, except for cellulose acetate and an aromatic ester of cellulose. It is useful for separation of various chemical substances, especially optical resolution of optical isomers.

Abstract: A separation agent essentially comprises an aliphatic or aromatic ester of a polysaccharide, except for cellulose acetate and an aromatic ester of cellulose. It is useful for separation of various chemical substances, especially optical resolution of optical isomers.

Abstract: A separation agent essentially comprises an aliphatic or aromatic ester of a polysaccharide, except for cellulose acetate and an aromatic ester of cellulose. It is useful for separation of various chemical substances, especially optical resolution of optical isomers.

Abstract: A new alkyl-substituted phenylcarbamate derivative of a polysaccharide, exclusive of cellulose, has an alkyl-substituted phenylcarbamoyl group for 80 to 100 percent of the hydroxyl groups attached to the polysaccharide and is useful to the optical resolution of racemic compounds.

Abstract: An alkyl-phenylcarbamate derivative of a polysaccharide has in 80 to 100 percent of hydrogen atoms of the amino and hydroxyl groups an alkylphenyl-carbamoyl group having the formula (I): ##STR1## in which (1) at least one of R1 to R5 is a straight alkyl having 4 to 8 or a branched alkyl having 3 to 8 carbon atoms or at least two of R1 to R5 each are a straight alkyl having 1 to 3 when the polysaccharide is cellulose; (2) at least one of R1 to R5 is a straight alkyl having 1 to 8 carbon atoms or a branched alkyl having 3 to 8 carbon atoms when the polysaccharide is any one other than cellulose; and the other(s) of R1 to R5 is hydrogen. It is useful to optical separation of a racemic mixture.

Abstract: A mixture of chemical substances such as optical isomers, geometrical isomers and polymers having different molecular weight ranges is separated to each ingredient by use of a cellulose derivative having an aromatic ring in the chromatographic method.

Abstract: A chromatographic resolving agent made of silica gel chemically bonded with an optically active polymer having either an asymmetric carbon atom in the main chain or molecular dissymmetry causing a helical structure of the main chain thereof.

Abstract: Solvent-soluble copolymers having a number average molecular weight of about 1,000 to about 1,000,000 and comprising recurring units of the following formulae (I) and (II) (case A) or recurring unit of the following formulae (I), (II) and (III) (case B) or solvent-soluble graft copolymers having a number average molecular weight of about 1,500 to about 2,000,000 and comprising recurring units of the following formulae (I), (II) and/or (II'), and (IV) (case C) or recurring units of the following formulae (I), (II) and/or (II'), (III) and (IV) (case D), said recurring units being combined to form the main alkylene chain, wherein in the cases A and B the amount of the formula (I) unit is about 3 to 60 mol % of the total amount of the whole units, and in the cases C and D the amount of the formula (I) unit is about 5 to 60 mol % of the total amount of the units of formulae (I), (II) and/or (II'), and (IV), and in the cases B and D the amount of the formula (III) unit is about 1 to 40 mol % of the total amount of

Abstract: Solvent-soluble copolymers having a number average molecular weight of about 1,000 to about 1,000,000 and comprising recurring units of the following formulae (I) and (II) (case A) or recurring unit of the following formulae (I), (II) and (III) (case B) or solvent-soluble graft copolymers having a number average molecular weight of about 1,500 to about 2,000,000 and comprising recurring units of the following formulae (I), (II) and/or (II'), and (IV) (case C) or recurring units of the following formulae (I), (II) and/or (II'), (III) and (IV) (case D), said recurring units being ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 represents independently hydrogen, a straight or branched chain alkyl group having 1 to 4 carbon atoms or a halogen; R.sub.4 represents hydrogen or a straight or branched chain alkyl group having 1 to 10 carbon atoms; R.sub.5 represents an alkyl group having 1 to 6 carbon atoms, a phenyl group or a benzyl group; R.sub.6 represents hydrogen or a methyl group; R.sub.

Abstract: A mixture of chemical substances such as optical isomers, geometrical isomers and polymers having different molecular weight ranges is separated to each ingredient by use of a cellulose derivative having an aromatic ring in the chromatographic method.

Abstract: A mixture of chemical substances such as optical isomers, geometrical isomers and polymers having different molecular weight ranges is separated to each ingredient by use of a cellulose derivative having an aromatic ring in the chromatographic method.