The Chifeng the Alum price - ammonium alum manufacturers - Coal columnar activated carbon / gold purification activated carbon / coconut shell activated carbon / Nutshell activated carbon / the coal water purification activated carbon / air purification activated carbon manufacturers, please call Tel: 18,301,509,601 QQ: 631 979 131 Web site: http: / / www.jphxt.com/ large favorably, www.bkjingshui.com factory direct prices lower www.bjklhxt.com/ we are happy to serve you! alum, also known as alum, potassium alum, potassium alum, potassium alum, complex salt containing water of crystallization of potassium sulfate and aluminum sulfate. The alum widely used in medicine, food and chemical industries. The alum as a purifying agent alum dissolved in water ionization produces of Al3 +, Al3 + OH ˉ hydropower from combined generation of aluminum hydroxide, aluminum hydroxide colloidal particles with a positive charge, sediment and negatively charged colloidal particles encounter each other The charges are neutralized. Lost charge of the colloidal particles, soon to coalesce together, more knot to the larger particles, and finally sank to the bottom. In this way, the water becomes clear and clean. Alum as extinguishing agent foam extinguisher filled about 1mol / L alum solution and about 1mol / L NaHCO3 (sodium bicarbonate) solution (there is foaming agent), the two solutions a volume ratio of about 11:2. Alum is excessive for an adequate response to the fire extinguisher inside the baking soda, released sufficient quantities of carbon dioxide, in order to achieve the purpose of extinguishing deep-fried fritters (cake) or puffed food. Alum as a bulking agent in the flour, adding baking soda, and then adding alum to make the same amount of baking soda baking soda than radiotherapy alone more than doubled carbon dioxide released, so that you can make fritters (cake) all of a sudden on the drum in the hot pan, crispy and delicious fritters ( cake). Other role alum also for the preparation of aluminum salts, paints, tanning, mordant, paper, waterproof etc.