A kind of method that calcium acetate is prepared using ostreae testa pulverata

A kind of method that calcium acetate is prepared using ostreae testa pulverata

  • CN 108,129,292 A
  • Filed: 01/26/2018
  • Published: 06/08/2018
  • Est. Priority Date: 01/26/2018
  • Status: Active Application
First Claim
Patent Images

1. A kind of 1. method that calcium acetate is prepared using ostreae testa pulverata, it is characterised in that pass through following each step:



  • 1)

    Oyster shell is crushed, sieves, collects particle, 40~120 mesh coarse powder and 120 mesh screens more than 40 mesh screens respectivelyFollowing fine powder;



    2)

    Particles more than 40 mesh screens is taken, 800~1200 DEG C of 4~6h of calcining is placed in, obtains calcined oyster shell, cool down, be sealed,For use;



    3)

    Take step(

    1)

    In 40~120 mesh coarse powder, add in 3~5 times of quality purified water, boil 1~2h in stirring, filterTo filtrate and filter residue;

    Filtrate concentrates 10~20 times, obtains oyster extract;



    4)

    By step(

    3)

    In filter residue, add in 2~3 times of steps(

    1)

    A concentration of 0.5~1.0w/v%'"'"'s of gained meal qualityNaOH solution boils 0.5~1h in stirring, solution is abandoned in filtering;

    Filter residue is with 3~5 times of steps(

    1)

    The purifying of gained meal qualityIt is cleaned 2~3 times in water stirring, until cleaning solution pH=6~8, abandon water layer, obtain clean aqueous oyster coarse powder;



    5)

    Clean aqueous oyster coarse powder is taken, conventionally, adds in 3~4 times of steps(

    1)

    The purifying of gained meal qualityWater is slowly added to 1~2 times of step in stirring(

    1)

    The glacial acetic acid of gained meal quality, is stirred to react 24~36h, and it is anti-to obtain calcium acetateAnswer liquid;



    6)

    Calcium acetate reaction solution is taken to be centrifuged with 8000~10000rpm, obtains clear supernatant;



    7)

    Take step(

    2)

    Gained calcined oyster shell, the purified water of 3~5 times of calcined oyster shell quality of addition, 0.5~1h of stirring, standing 2~3h abandons supernatant;

    Precipitation adds in the purified water of 2~3 times of calcined oyster shell quality, stirs evenly, obtains calcined oyster shell suspension;



    8)

    Take step(

    7)

    Gained calcined oyster shell suspension, step is added in stirring(

    6)

    Gained supernatant, until pH is 6~8,Through 200 mesh filter cloth coarse filtration and 1um micro porous filtrations, clear calcium acetate solution is obtained;



    9)

    Take step(

    8)

    Gained calcium acetate solution adds in a concentration of 95v/v% ethyl alcohol of 2~5 times of calcium acetate solution volumes, warp200 mesh are squeezed with upper filter screen and filtered, decompression filtrate recycling ethanol;

    Filter residue through 60~75 DEG C of heated-air dryings or be dried under reduced pressure to getTo calcium acetate.

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