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A method for preparing a dispersion containing antibiotic powder comprises mixing the antibiotic powder and a dispersing medium at a temperature at which the dispersing medium is in the form of a liquid under a reduced pressure of not more than 470 Torr. According to this method, the antibiotic powd

A method for preparing a dispersion containing antibiotic powder comprises mixing the antibiotic powder and a dispersing medium at a temperature at which the dispersing medium is in the form of a liquid under a reduced pressure of not more than 470 Torr. According to this method, the antibiotic powder is uniformly dispersed in various dispersing mediums and antibiotic products having high antibiotic action is effectively be provided by using the resulting dispersion.

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A method for preparing a dispersion containing an antibiotic powder, which comprises mixing an antibiotic powder selected from the group consisting of an antibiotic zeolite whose ion-exchangeable ions are partially or completely ion-exchanged with antibiotic metal ions or with ammonium and antibioti

A method for preparing a dispersion containing an antibiotic powder, which comprises mixing an antibiotic powder selected from the group consisting of an antibiotic zeolite whose ion-exchangeable ions are partially or completely ion-exchanged with antibiotic metal ions or with ammonium and antibiotic metal ions and an antibiotic amorphous aluminosilicate whose ion-exchangeable ions are partially or completely ion-exchanged with antibiotic metal ions or with ammonium and antibiotic metal ions with a dispersion medium selected from the group consisting of a thermoplastic resin, a polyol, an alcohol, a higher alcohol, a higher fatty acid and a resin emulsion, said mixing being carried out at a reduced pressure of not more than 470 Torr and at a temperature at which said dispersion medium is in the form of a liquid such that the viscosity (at 25°C.) said mixture of antibiotic powder and dispersion medium is adjusted to 2,000 cp. to 200,000 cp.