Method for producing refined light-color rosin by using turpentine as raw material

Method for producing refined light-color rosin by using turpentine as raw material

  • CN 101,649,160 B
  • Filed: 09/11/2009
  • Issued: 03/04/2015
  • Est. Priority Date: 09/11/2009
  • Status: Active Grant
First Claim
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1. one kind take rosin as the method for raw material production refined light-color rosin, it is characterized in that:

  • first dissolve rosin with the lower boiling good solvent methylene dichloride of rosin, the mass volume ratio of rosin and good solvent methylene dichloride is 10;

    8 ~ 30, cross and filter insoluble wood chip, after bark impurity, fully wash with oxalic acid aqueous solution at normal temperatures, consumption of oxalic acid is 0.05 ~ 1% of rosin weight, the iron Gao Zi removing water-soluble impurity and be combined with rosin acid, divide phase of anhydrating, organic phase under agitation adds the non-benign solvent acetonitrile of rosin acid, the mass volume ratio of rosin and non-benign solvent acetonitrile is 10;

    8 ~ 30, make rosin acid Precipitation also in discrete particles state, leave standstill 30 minutes ~ 10 hours, make the abundant Precipitation of rosin acid, filtered and recycled Gum Rosin Acid precipitation, finally, rosin acid is deposited in N 2or CO 2the lower normal heating melting of protection, obtains the refined light-color rosin of easy crystallization after melts cooling curing, or rosin acid is deposited in 150 ~ 180 DEG C adds the refined light-color rosin that thermal isomerization process obtains not easily crystallization for 1 ~ 3 hour.

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