Molecular Formula | KnNa12-n[(AlO2)12(SiO2)12]xH2O |
Water Solubility | Insoluble in water. |
Appearance | White powder or granule |
Color | Yellow to yellow-green |
Storage Condition | Room Temprature |
Sensitive | Hygroscopic |
MDL | MFCD00147627 |
Use | Used as a desiccant |
Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R20 - Harmful by inhalation |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 28421000 |
Raw Materials | Silicon dioxide kaolin Sodium silicate Aluminum sulfate Sodium aluminate Calcium chloride Aluminum hydroxide Sodium hydroxide Aluminum oxide |
white powder or particles with cubic lattice, microporous structure. Tasteless, odorless, non-toxic, non-corrosive. Soluble in strong acid and alkali, insoluble in water and organic solvents. High thermal stability. Large surface area. It is an aluminosilicate polyhydrate. With a uniform microporous structure, is a good solid adsorbent and molecular sieve role, the polar molecules and saturated molecules have preferential adsorption, adsorption of gas and liquid can be desorbed, molecular sieve can be regenerated after application, repeated use.
thermal synthesis method: the water glass is boiled with steam to prepare an aqueous solution with a relative density of 1.2 to 1. 25, and impurities are removed by sedimentation, and the supernatant is taken for use. The solid aluminum hydroxide and sodium hydroxide were mixed according to the mass ratio of 1.2:1 and then heated and dissolved to prepare a sodium metaaluminate solution for use. In order to prevent hydrolysis of the sodium metaaluminate solution, it is preferable to use a freshly prepared solution. The water glass, sodium metaaluminate, sodium hydroxide according to a certain molar ratio (generally Al203 ; S102 ; Na20 ; H20-1 l2:3:185) are mixed, under stirring, the reaction was carried out at about 80 ° C. For 30min, and the resulting gel was heated to a constant temperature of 90 ° C. For 1H, and was further heated to 102 ° C. And crystallized at 2 ° C. For 4H to obtain a crystal powder. After filtration and washing, potassium chloride was added for ion exchange (exchange degree of 40%), and then filtration and washing, drying, kneading, shaping, burning and activation by adding a binder were performed to obtain 3A Molecular sieve.
for the drying of petroleum cracking gas and olefins.
packed in a carton or drum lined with polyethylene plastic bag, net weight 20kg, 30kg. They were stored in a dry warehouse. Do not store and mix with strong acid or strong base. Mixing with oil or other liquid organic matter is prohibited. When loading and unloading should pay attention to light, to prevent packaging damage. Avoid water immersion. Toxicity and protection: inhalation of dust can cause "pneumoconiosis" lung sclerosis. Pay attention to dust prevention.