A kind of preparation method of Tara industrial tannic acid
A technology for industrial tannic acid and tara, applied in the preparation of sugar derivatives, chemical instruments and methods, sugar derivatives, etc., can solve the problems of low tannic acid content, difficult solid-liquid separation, and high refining costs, and achieve purity High, operability, simple process effect
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[0010] The invention provides a method for preparing tara industrial tannic acid, wherein the method comprises leaching tara bean pods and / or bean pod shells with acidified diatomite, activated clay and activated carbon to obtain an extract.
[0011] In the method provided by the present invention, the tara pod is the fruit of the tara tree, including pod shell and seeds, and the tara pod shell is the part of the tara pod after the seeds are removed.
[0012] In the present invention, Tara pods or Tara pod shells can be used as raw materials, and Tara pods and pod shells can be mixed to obtain mixed raw materials as raw materials. When using the mixed raw materials of Tara pods and pod shells, for two The ratio of the latter is not particularly limited, and may be any ratio. Preferably, the raw material used is tara pod shells.
[0013] In the present invention, the tara pods can be tara pods that have not been pulverized, or can be crushed tara pods with a particle size larg...
Embodiment 1
[0040] Weigh 5kg of Tara pod shells, put the Tara pod shells into the leaching tank with 90kg of pure water, start stirring, add 0.15kg of diatomite acidified with 0.2% mass concentration of hydrochloric acid solution in sequence, stir and extract for 4h , then add 0.23kg activated clay and 0.23kg activated carbon, stir and extract for 45 minutes, stop stirring, let stand for leaching for 45 minutes, make the diatomite, activated clay and activated carbon fully settle to form a filter layer. Stop leaching, carry out vacuum suction filtration, and vacuum degree is controlled at-0.04MPa. The clarified filtrate obtained after suction filtration was vacuum concentrated and spray-dried to obtain 2.6 kg of Tara industrial tannic acid product.
[0041] The appearance of the product is a light yellow amorphous powder. According to the method of standard LY / T1642-2005, the product has a tannic acid content of 81.35% by weight, a loss on drying of 6.21% by weight, a water-insoluble matt...
Embodiment 2
[0043] Tara industrial tannic acid was prepared in the same manner as in Example 1, except that the Tara raw material used was Tara pods.
[0044] Obtain 2.21kg of Tara industrial tannic acid products, the product appearance is light yellow amorphous powder, according to the method detection of standard LY / T1642-2005, the tannic acid content of the product is 80.86% by weight, the loss on drying is 6.58% by weight, water insoluble 0.56% by weight, 0.6 Lovibond units of color.
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Abstract
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