Activated alumina is kind of spherical hard granule full of many invisible fine pore .It is no corruptive, non toxic, and has close affinity to polar molecule, This product is typically used as effective desiccant it has high adsorption capacity for moisture deep dew point control (-70℃), and low regeneration temperature (150℃),it is widely used in petrol chemical, textile and air-separation field .
Activated alumina to gas, water vapor and some liquid moisture selective adsorption capacity. Saturated adsorption can be heated at about 175-315 ° C to remove water and resurrection. Adsorption and resuscitation may be performed multiple times. In addition to used as desiccant, but also from the contaminated oxygen, hydrogen, carbon dioxide, natural gas and other lubricants in the adsorption of steam. And can be used as catalyst and catalyst carrier and chromatographic analysis carrier.
Activated alumina belongs to the category of chemical alumina. It is mainly used in adsorbents, purifying agents, catalysts and catalyst carriers. The raw materials and preparation methods are different according to different uses.
Activated alumina in certain operating conditions and regeneration conditions, the product of the drying depth of up to the dew point of -70
Professional Activated Alumina Manufacturer
Professional activated alumina manufacturers the following, 【Use】: This product can be used as high fluoride fluoride water fluoride removal agent (fluoride capacity), alkylbenzene production cycle of alkane defluorination agent, transformer oil (Dew point of up to -40 degrees), in the oxygen industry, the textile industry, the electronics industry gas drying, automatic instrument wind drying and in the chemical fertilizer, petrochemical drying and other industries for desiccant, Air separation industry, the pressure swing adsorption dew point of -55 degrees. Is a trace of water depth of drying efficient desiccant. Very suitable for non-thermal regeneration device.
The introduction of active alumina fluoride removal: China's "drinking water health norms" requirement, fluoride content shall not exceed 1.0mg / L. Fluoride is too high raw water is often alkaline, PH value is often greater than 7.5.
Defluorination methods generally divided into the following categories: ⑴ adsorption filtration; ⑵ membrane; ⑶ flocculation sedimentation; ⑷ ion exchange.
The main factors affecting the adsorption performance of activated alumina:
⑴ particle size: the smaller the particle size, the higher the adsorption capacity, but the smaller particle size, the lower the particle strength, affecting its service life.
⑵ PH value of raw water: When PH value is greater than 5, the lower the PH value, the higher adsorption capacity of activated alumina. ⑶ raw water initial fluorine concentration: the higher the initial fluoride concentration, adsorption capacity.
⑶ raw water alkalinity: raw water bicarbonate concentration, adsorption capacity will be reduced.
(4) chloride ions and sulfate ions. ⑸ arsenic effects: activated alumina adsorption of arsenic in water, arsenic in the accumulation of activated alumina on the fluoride ion adsorption capacity of the decline, and the regeneration of arsenic ions is difficult to elute.
Activated alumina how to regenerate: Regeneration agent sodium hydroxide solution, aluminum sulfate solution can also be used.
Sodium hydroxide regeneration solution concentration of 0.75% -1%, sodium hydroxide consumption can be removed for each 1g of fluoride required 8-10g of solid sodium hydroxide calculation, the amount of regeneration of the filter volume of 3-6 times the volume . The solution concentration of the aluminum sulfate regenerating agent is 2-3%, and the consumption amount of the aluminum sulfate can be calculated as 60-80 g of solid aluminum sulfate per 1 g of the fluoride to be removed.
