Method for preparing white carbon black by circularly using mother liquor
A white carbon black and mother liquor technology, applied in the direction of silica, silicon oxide, etc., can solve the problems of high polymerization degree, poor dispersibility and environmental pollution of white carbon black, so as to slow down the polymerization, reduce the particle size, and increase the specific surface area. Effect
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[0013] A method for preparing white carbon black by recycling mother liquor includes the following steps:
[0014] a. Take 1000 parts by weight of a sodium silicate solution with a concentration of 15%, and add to the sodium silicate solution: 100 parts by weight of sodium sulfate, stir well to obtain a mixed solution;
[0015] b. Add 15% sulfuric acid solution and 12% hydrochloric acid solution to the mixed solution in a volume ratio of 1:1.2 until the sodium silicate reaction is complete, while adding 0.2 parts by weight of dimethyl silicone oil and 0.05 parts by weight of poly Sorbate 80, continuous stirring at 1200-1500 rpm, precipitation in the reaction system;
[0016] c. The obtained precipitate is allowed to stand and age for 4-5 hours, and then press filter to obtain a filter cake. The mother liquor can be reused to step (1); the concentration of the mother liquor is 5%;
[0017] d. Repeatedly washing with water added with 2% sodium dodecylbenzene sulfonate to remove simethic...
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