US 4,714,555 AGranted

Agent for separation

AssigneeDaicel Chemical Industries, Ltd.

InventorsTohru Shibata, Ichiro Okamoto

Life of this patent

Estimating the term…

Abstract

A nitrate or a nitrate group-containing derivative of polysaccharide is useful as a separating agent for a chemical substance, especially an optical isomer.

Claims12

Dependent claims

A method of separating, by chromatography, an optical isomer from a racemic modification containing the same, which comprises the step of flowing a solution of said racemic modification in contact with cellulose trinitrate as a chromatographic resolving agent.

Dependencies are inferred from the claim text.

Facts

Application: 07/024,877Filed 11 Mar 1987 · continuation
Priority: JP 59-1576031 Jan 1984
Granted: 22 Dec 1987
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C08B 5/04
Cellulose nitrate , i.e. nitrocellulose: post-esterification treatments , e.g. densification of powders, including purification
C07C 45/78
Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds: separation;…
C07C 45/786
Separation; Purification; Stabilisation; Use of additives: by membrane separation process, e.g. pervaporation, perstraction, reverse osmosis
C08B
Polysaccharides

Family

Serial696,137Parent of this continuation · filed 29 Jan 1985
US 4,714,555 AThis patent

From the US filing history. Foreign family members aren’t listed.

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