Particle defoamer comprising a silicone emulsion and process for preparing same

A granular defoamer, wherein, the granular defoamer comprises:

• A. a carrier:
• selected from sulfate, carbonate, phosphate, polyphosphate, starch, cellulose or aluminosilicate, can be used separately or in mixture, dosed at 55˜75% of total mass of the granular defoamer, and divided into two parts A1 and A2, with mass ratio of A1 to A2 equal to 4:1˜15:1;
• B. a silicone emulsion:
• prepared from silicone grease, silicone polyether, emulsifying agent, and deionized water, dosed at 15˜35% of total mass of the granular defoamer, and divided into two parts B1 and B2, with mass ratio of B1 to B2 equal to 4:1˜10:1;
• C. a texturing agent:
• selected from acrylic polymer, cellulose ether, citric acid, citrate, or polyvinylpyrrolidone, can be used separately or in mixture at any mix ratio, dosed at 3˜10% of total mass of the granular defoamer;
• D. a solvent:
• prepared from alcohol and/or water, can be used separately or in mixture at any mix ratio, dosed at 2%˜10% of total mass of the granular defoamer.