2014年8月26日星期二

activated zeolite Activated Zeolite is a natural zeolite

Activated Zeolite is a natural zeolite is made through a variety of special activation process, activated zeolite powder the adsorption performance stronger than the natural zeolite, ion exchange performance is also better, not only to remove the water turbidity, color, odor, and harmful heavy metals in water, such as: chromium, cadmium nickel, zinc, mercury, iron ions and organic: phenol, BHC, DDT, three nitrogen, ammonia nitrogen, phosphate ions activated alumina and other substances with adsorption exchange interaction, but also conducive to all kinds of micro-pollutants removal and flooding fluid does not contain toxic, harmful substances, removal of iron, fluorine effect is more significant. So the ideal filter activated zeolite is a new industrial water supply, wastewater treatment and water filtration.

2014年8月20日星期三

activated molecular sieves Structure

Zeolitic molecular sieves known as synthetic zeolites or molecular sieves having a chemical composition formula is:
[M2 (Ⅰ) M (Ⅱ)] O.Al2O3.nSiO2. MH2O
Formula M2 (Ⅰ) and M (Ⅱ) respectively monovalent and divalent metal ions, most of the sodium and calcium, n is called silica to alumina ratio of the zeolite, sodium silicate and silicon mainly from silica, aluminum comes from sodium aluminum and Al (HO) 3, etc., which react with aqueous sodium hydroxide colloid was prepared and dried after a zeolite, activated alumina typically n = 2 ~ 10, m = 0 ~ 9.
Characteristics of the zeolite molecular sieve having a role, it has a uniform pore size, such as 3A0,4A0,5A0,10A0 pores. There 4A0 4A0 pore zeolite adsorption of methane, ethane, and not more than three carbon adsorption of n-alkanes. It has been widely used for activated alumina drying agent  gas adsorption separation, drying, and gas and liquid separation are different alkanes.
Thus proteoglycan aggregates composed of coiled turns, forming a sieve-like microporous structure, called molecular sieves. Zeolite molecular sieve allowing only its micro-pores is less than the material through its pores large macromolecules, the bacteria has a barrier function.

2014年8月14日星期四

Specific applications of activated sieves

Activate sieves is one of the main material of volatile organic compounds in the physical adsorption method used in processing. But if not completely degrade pollutants, easy to produce secondary pollution.regeneration of molecular sieves in order to solve the problem of light pollution, activated sieves humans began to think of ways to use technology to replace traditional catalytic degradation purification technology, activated sieves Photocatalytic treatment technologies emerged. This method is based dioxide as a catalyst, activating sieves method using photocatalytic oxidative degradation of volatile organic compounds in the air, molecular sieve grace no other chemical additives, mild reaction conditions, and the final product is usually only carbon dioxide and water, will not be activated sieves produce secondary pollution.