Method of purifying liquid crystal

摘要

A process for purifying an anti-ferroelectric liquid crystal or a ferrielectric liquid crystal, which comprises the following steps 1 to 4, step 1; preparing a liquid crystal solution of an anti-ferroelectric liquid crystal or a ferrielectric liquid crystal to be purified in an aromatic hydrocarbon solvent, step 2; bringing the liquid crystal solution into contact with at least one adsorbent selected from the group consisting of zeolite, alumina and silica gel to separate the liquid crystal solution from the adsorbent, step 3; precision-filtering the resultant liquid crystal solution, and step 4; removing the solvent from an obtained filtrate and recovering a purified liquid crystal, according to which process, there can be easily obtained a high-purity liquid crystal which shows a specific resistance value of at least 5 x 10<12> OMEGA .cm and a small thermal decomposition ratio, and which is therefore suitable as a raw material for a liquid crystal display device.