Preparation method of tara industrial tannic acid

Preparation method of tara industrial tannic acid

  • CN 102,140,121 A
  • Filed: 01/28/2010
  • Published: 08/03/2011
  • Est. Priority Date: 01/28/2010
  • Status: Active Grant
First Claim
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1. a tower draws the preparation method of technical grade Weibull.It is characterized in that comprising following a few step:

  • The first step, commercial tower draw powder to adopt 400 type pulverizers, and 3700RPN is at the bottom of 80~

    100 mesh sieves.In second step, tower draws the powder extracting technology to adopt two jar of three two dynamic countercurrent extraction process of step of low temperature.One step extraction temperature;

    35~

    45 ℃

    , two step lixiviates;

    40~

    50 ℃

    , three step lixiviates;

    45~

    55 ℃

    .One step extraction time;

    0.5~

    1hr, two step extraction time;

    0.5~

    1hr, three step lixiviate extraction time;

    0.5~

    1hr.One step lixiviate solid-to-liquid ratio;

    1;

    5~

    6, two step lixiviate solid-to-liquid ratios;

    1;

    4~

    5, three step lixiviate solid-to-liquid ratios;

    1;

    3~

    4.In the 3rd step, by above-mentioned extracting technology tower being drawn powder raw material and water is the two dynamic extraction devices of 1;

    4~

    6 addings, intensification, insulation, extraction by solid-to-liquid ratio, and preparation tower draw powder solid-liquid extracts mixed solution.In the 4th step, tower draw powder solid-liquid extracts mixed solution and separates employing screw settling centrifugation (horizontal screw unloading centrifugation) technology.Tower draw powder solid-liquid extracts mixed solution and contains solid concentration 20~

    15%, solid phase particles degree 〉

    =0.005MM, solid-liquid difference in specific gravity 〉

    =0.005 (Gu heavy-fluid is light).In the 5th step, tower draw powder solid-liquid extracts the mixed solution separating device and selects the LW horizontal spiral discharge sedimentation centrifuge for use.In the 6th step, tower draw powder solid-liquid extraction separation liquid adopts foam separation, settlement separate coupled combination metallization processes, and the foam separation of tower draw powder solid-liquid extraction separation liquid, settlement separate coupling metallization processes equipment adopt level Four diffusion, coupling to divide from equipment.In the 7th step, the foam separation of tower draw powder solid-liquid extraction separation liquid, settlement separate liquid filter through filter press technology, plate-and-frame filter press be chosen as universal sheet frame pressure filter.Material requires to avoid iron.In the 8th step, the foam separation of tower draw powder solid-liquid extraction separation liquid, the filter press liquid of settlement separate liquid promptly obtain the product tower and draw industrial tannic acid through concentrated (short tube evaporation or falling film evaporation etc.), dry (centrifugal spraying or pressure spray dryer).

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