... porosity and even aperture, good resistance to high temperature, acid and alkali without shedding. Using multi-hole porcelain as ... max rate is 0.1μm;2. Excellent resistance to acid and alkali, fit for filtering different acids (such as ... as air purification and disinfection.1. Acid purification, such as hydrochloric acid, vitriol, hydrofluoric acid and phosphoric acid, etc.2. Alkali purification, such ...