A kind of preparation method of the synthetic method of aldehydedodextrans, the method for coating based on the aldehydedodextrans and microsphere composition

A kind of preparation method of the synthetic method of aldehydedodextrans, the method for coating based on the aldehydedodextrans and microsphere composition

  • CN 105,949,343 B
  • Filed: 05/04/2016
  • Issued: 02/13/2018
  • Est. Priority Date: 05/04/2016
  • Status: Active Grant
First Claim
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1. a kind of synthetic method of aldehydedodextrans, it is characterised in that comprise the following steps:

  • A, after glucan being dissolved in into water, under inert gas shielding, EDTA, 1, 4-benzenediol, sodium borohydride, NaOH and first are addedBenzene, it is stirred at reflux 1-3 hours;

    B, bromo- 1, the 1- diethoxyethane solution of 2- is added dropwise into system, time for adding is no less than 1 hour;

    After being added dropwise to complete, stirMix backflow 12-18 hours;

    C, the organic phase in system is washed with water, obtains the aqueous solution, the aqueous solution is added in methanol, obtains hydroformylation sugar precursorPrecipitation;

    D, it is hydroformylation sugar precursor precipitation is soluble in water, add toluenesulfonic acid and adjust pH to 1-2, after heating hydrolysis, use NaOHSolution is adjusted to neutrality, and aldehydedodextrans are obtained in the form of precipitation.

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