Title: Purification method for slightly soluble compound
Application Number: 86106215 Application Date: 1986.09.16
Publication Number: 1017363 Publication Date: 1988.03.30
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C09C3/00
Applicant(s) Name: Fine Chemistry Division of Beijing Science and Tec Address:
Inventor(s) Name: Guan Xiangrui, Li Kezhong
Attorney & Agent: LIU GYONGWEI
Abstract:
     This invention is a combination of extroctive-separating method, chromatographic-fractionating method and rearystallizing method with the use of Soxhlet's extractor, which makes a slightly soluble compound (especially organic compound with pigmental impurities) purified. A jacket packed with adsorbent which can adsorb impurities is inserted in Soxhlet's extractor, and the crude product to be purified is put into the middle of the jacket. The separated product is scrubbed with refluxing solvent and crystallizes out pure crystalline substance. The separated product is scrubbed with refluxing solvent and crystallizes out pure crystalline substance. The advantages of this invention are as fotlows: simple operation, high purifying efficiency and high purity of the product, particularly suitable for mass purification.
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