Process

Process

  • CN 102,666,510 A
  • Filed: 09/23/2010
  • Published: 09/12/2012
  • Est. Priority Date: 09/24/2009
  • Status: Active Application
First Claim
Patent Images

1. the preparation method of purified basically Socryl Blue BRL pentahydrate form A, whereinA) Socryl Blue BRL being suspended in water-content is at least 0.4 the organic solvent corresponding to the water activity at 25 ℃

  • , this suspension-s is remained on low temperature, and solid is separated and drying, thereby from solid, remove organic solvent and any excessive water;

    B) Socryl Blue BRL being dissolved in water-content at elevated temperatures is at least 0.4 the organic solvent corresponding to the water activity at 25 ℃

    , with this solution cooling, precipitated solid is separated and drying, thereby from solid, remove organic solvent and any excessive water;

    OrC) Socryl Blue BRL being dissolved in water-content is at least 0.4 the organic solvent corresponding to the water activity at 25 ℃

    , and this organic solvent and any excessive water are evaporated to the exsiccant solid.

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