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    • 5. 发明专利
    • PRODUCTION OF WATER-SOLUBLE POLYSACCHARIDE
    • JPH1036405A
    • 1998-02-10
    • JP19874296
    • 1996-07-29
    • FUJI OIL CO LTD
    • FURUTA HITOSHITAKAHASHI TAROHATTORI MITSUOMAEDA YUICHISAWAMURA NORIO
    • C12S3/02C08B37/00
    • PROBLEM TO BE SOLVED: To obtain a water-soluble polysaccharide having a low foaming property and capable of forming a highly transparent aqueous polysaccharide soln. at a low purification cost by treating a water-soluble polysaccharide extract with a proteolytic enzyme and then purifying it. SOLUTION: A water-soluble polysaccharide extract (preferably an extract from beans, e.g. soybeans) is treated with a proteolytic enzyme (e.g. a protease or a peptidase such as pepsin, trypsin, papain, subtilisin or bromelin of either endo-type or exo-type) and then purified. Concretely, for example, water is added to fresh bean curd less obtained in the step of producing a separated soybean protein, and the obtd. mixture is adjusted to pH4.5 with hydrochloric acid to conduct extraction at 120 deg.C for 1.5hr. The extract is cooled and centrifuged and the obtd. supernatant (water-soluble polysaccharide soln.) is adjusted to pH7.0. Then a protease is added thereto to conduct a reaction at 40 deg.C for 120min, and the soln. is centrifuged to remove a suspended matter and then purified with an active carbon column. The foaming power and turbidity of the aqueous soln. are remarkably reduced to reduce the amt. of additives used for the purification.