Research on preparation and filtering effects of modified talc filter aid

To reduce the shortcomings of existing filtering assistance, talc was modified by a two-step method. In first step, talcum powder heated microwave in acid solution. second stirred with Hexadecyl Trimethyl Ammonium Bromide (HTAB) solution for optimum time under an temperature. The temperature, and amount HTAB were investigated batch membrane filtration experiments kaolin suspension. effects new filter aid evaluated rate moisture content cake. results showed that conditions were: 0.05 mmol/L 100 ml, temperature 80℃ 60 min. When filtrate accumulated to 25 13.21 s shorter than others. flux microfiltration largest (0.024 L/m2·s) when added into characterized Fourier Transform Infrared Spectroscopy X-ray diffraction, which made experimental more obvious. Characterization indicated hydrophobicity excellent because microwave-assisted acidification could absorb cationic surfactants electrostatic interactions. Finally, comparing assist diatomite assist, it is concluded performance suspension superior other materials.