Zeolite Knowledge: sieve efficient microwave drying technology

Zeolite Knowledge: sieve efficient microwave drying technology. Microwave drying technology to solve the traditional dry sieve slow drying, energy loss, poor product quality problems, in particular in: 
1, microwave drying sieve speed, usually a few minutes to reach the microwave drying purposes; 
2, microwave drying sieve evenly to achieve the depth of dry, good product quality; 
3, static dry, do not burn with less dust; 
4, non-contact drying, to avoid contamination of the molecular sieve; 
5, zeolite 13x microwave drying process safety, energy conservation, environmental protection, the use of electricity, dry inside and outside at the same time, more than 50% energy saving electric dry; 
6, shorten the production cycle, greatly reducing the production of working capital; 
7, microwave drying equipment cabinet temperature below 40 ℃, improve workers' working conditions; 
8. Equipment is simple and convenient.

Principles and types of Zeolite

Absorption features: molecular sieve adsorption material from physical adsorption (van der Waals forces), which has a strong internal crystal cavities polarity and Coulomb field of polar molecules (such as water) and unsaturated molecules show a strong adsorption capacity.
Screening function: very uniform pore size distribution of the molecular sieve, only molecular diameter smaller than the diameter of the hole before substance may enter bughole internal molecular sieves.
By order of priority and size to distinguish molecular adsorption of different substances, so the image is called "molecular sieve."
Type: synthetic zeolite molecular sieve zeolite and two natural. Most ① natural zeolite formed by volcanic tuffs occur and tuffaceous sedimentary rocks in marine or lacustrine environment reaction. Have been found to have more than 1000 kinds of zeolite mineral, the more important ones are 35 kinds, often with clinoptilolite, mordenite, erionite and chabazite, etc. Mainly in the United States, Japan, France and other countries, China also found that a large number of mordenite and clinoptilolite deposits, Japan is the largest country in the natural zeolite mined. ② due to natural zeolite subject to resource constraints, from the beginning of the 1950s, a large number of synthetic zeolites.
Goods zeolite crystal structure common prefixes Digital classify the different molecular sieves, such as type 3A, 4A type, 5a zeolite molecular sieves. 4A Class A type that table, aperture 4Å ;. A type of zeolite containing Na +, referred to as Na-A, if one is Na + K + replacement, pore size of about 3Å ;, is the 3A molecular sieve; Na-A if there is more than one third of the Na + Ca2 + exchange, aperture is about 5Å ;, is the 5A molecular sieve.

functions and features of Molecular sieve

The porous material has been widely used in many fields, such as the main catalytic microporous molecular sieve material, adsorption and ion exchange material separation materials plays an increasingly important role in oil processing, petrochemicals, fine chemicals, and household chemicals .
molecular sieves(also known as a synthetic zeolite) is a microporous aluminosilicate crystalline silicon. It is made of silicon oxide, aluminum oxide tetrahedra basic skeleton structure, there is a metal cation in the crystal lattice (such as Na +, K +, Ca2 +, Li +, etc.), in order to balance the negative charge excess crystals. According to their type of zeolite crystal structure is divided into: A type, X-type, Y type.
Zeolite relevant standards:
"3a molecular sieve" "4A molecular sieve" "5a molecular sieve and test methods" "13X molecular sieve"
"Water assay method static sieve" "sieve dynamic water assay method"
"Granular sieve size determination," "Determination of bulk density of molecular sieve" "sieve crush strength test method", "Standard Test Method for molecular sieve desiccant cooling systems with anti-wear performance," "Determination of dynamic zeolite adsorption of carbon dioxide."
"Industrial activated alumina," "air separation plant with activated alumina acceptance technical conditions"

Molecular sieve desiccant

Aluminosilicate compound having a cubic lattice, is mainly composed of silicon aluminum attached through an oxygen bridge consisting of the open framework structure, there are a lot of uniform pore size and neat in pore structure, large surface area of the inner hole. It also contains a low price and a larger ionic radius of metal ions and the chemical form of water. Since the water molecules in the continuous loss of heat, but the same crystal framework structure, the formation of many of the same size of the cavity, the cavity there are many of the same diameter connected pores, the diameter of these small pores of uniform size, pore ratio can diameter smaller molecules adsorbed into the interior of the cavity in the past, and the ratio of pores too large molecular exclusion, and thus able to molecular diameter different shapes, different degree of polarity of the molecule, the boiling point of different molecules, the different degree of saturation of psa oxygen generator molecular sieve supplier separation open, that has the effect of "screening" elements, so called regeneration of molecular sieves  Currently zeolite widely used in the metallurgical, chemical, electronics, petrochemical and natural gas industries

The practical significance of zeolite molecular sieves

zeolite molecular sieves has high adsorption capacity of zeolite molecular sieve, strong stability and other adsorbents no merit, the molecular sieve to obtain a wide range of applications. Zeolite molecular sieve in the field of biological macromolecules, zeolite molecular sieve are common activated zeolite powder pre column zeolite molecular sieve by adjusting temperature, zeolite molecular sieve can precisely control the size of a titanium silicate material, activated alumina manufactured aluminophosphate molecular sieve. Zeolite molecular sieve some crystal material has a large number of uniform pores,zeolite molecular sieves molecular activated alumina desiccent size than the small hole can pass through, and large molecules cannot pass through, so you can play the separation of different molecular interaction, activated alumina, activated zeolite powder this class of materials known asmolecular sieve. In fact,activated molecular sieves they found that a substance called activated alumina can be used as a good molecular sieve. When the temperature rises, the activated aluminadesiccent will gradually dehydrate, activated alumina desiccent micropore sizedecreases. Zeolite molecular sieve by using this method, you can fine tune the pore size range.