Zeolite knowledge: a comprehensive understanding of the molecular sieve oxygen plant

Molecular sieve type commonly used pressurized oxygen adsorption and desorption pressure (HP) method, carried out by two adsorption towers were the same cycle, in order to achieve continuous supply. System-wide automatic control by the SCM.
Molecular sieve type oxygen free home-based molecular sieve oxygen concentrator, medical zeolite gas machine
Molecular sieve type oxygen flow to the working principle of the two towers. After feed air pressurized by the compressor, through the air pretreatment means to remove oil, dust and other solid impurities and water, and cooled to room temperature, treated by the compressed air through the intake valve into the adsorber containing a molecular sieve, the air nitrogen, carbon dioxide is adsorbed effluent gas is the high purity oxygen, Tada when adsorbed to a certain saturation, the intake valve closed, the flush valve opens, the adsorption tower into the rinse stage, after the flush valve is closed, the valve opens desorption into the desorption regeneration phase, so that a complete cycle.
The main technical parameters of the molecular sieve oxysiv sieve type oxygen machine
1, the device normal operating conditions Ambient temperature: 5 ℃ ~ 40 ℃
Power supply voltage: 220V ± 22V air compressor host Oxygen, oxygen compressor 380V ± 38V
Power frequency: 50Hz ± 1Hz
Power: 37KW
Relative humidity: ≤80%
Atmospheric pressure: 86Kpa ~ 106Kpa
Host size L × W × H (without air compressor): 3.5 m × 1.8 米 × 2.7 米
2, the physical and chemical indicators of oxygen production equipment manufactured product oxygen 20m3 / h
Oxygen concentration: ≥ 90% (V / V)
Moisture content: ≤0.07g / m3
Carbon dioxide content: ≤0.01% (V / V)
Carbon monoxide content should be consistent with YY / T0298
Gaseous acid and alkali content should be consistent with YY / T0298
Ozone and other gaseous oxide content should be consistent with YY / T0298
Solids particle size: ≤10μm solids content: ≤0.5mg / m3
Edit this paragraph principle characteristic molecular sieve oxygen plant advanced: the use of zeolite, pressure swing adsorption (PSA) will air in oxygen and nitrogen separation, filter out harmful substances in the air, in order to gain compliance with standards of high purity medical oxygen oxygen. Oxygen and low cost: the air as raw material, without any additives, no residue and pollution emissions, low power consumption. Easy to use: plug the production of oxygen, simple operation, stable oxygen concentration, oxygen flow rate is adjustable, as used with the system, 24-hour continuous oxygen. Safe and reliable: Full pneumatic control procedures are low pressure system, stable performance, low noise.

High-silica zeolite ZSM-type zeolite

High-silica zeolite ZSM-type molecular sieves have a series, widely used for ZSM-5 zeolite , with the same structure of ZSM-8 and ZSM-11 zeolite; another group of ZSM-21, ZSM-35 and ZSM-38, etc. . 5a zeolite powder zeolite is often called high-silica zeolite molecular sieve Si / AI ratio can be as high as 50 or more, ZSM-8 up to 100, this group also showed a molecular sieve hydrophobic properties.
Their structural unit and mordenite similar, there are a pair of five-membered ring composed of non-cage-like cavity, only channel. ZSM-5 zeolite has two sets of cross-channel, one for straight and the other perpendicular to whom font, by ten yuan ring. Channel into an oval, its window diameter (0.55-0.60) nm. Belonging to the family of high-silica zeolite also all-silicon type Silicalite-1, ZSM-5 structure, like, Silicalite-2 with the same ZSM-11.

Zeolite transitional form of selective restriction

Some reaction, reactant molecules and their molecular products are not subject to restrictions window catalyst pore diffusion of knowledge within the required holes or due to a larger cage cavity space to form the corresponding transition states, or is restricted so that the reaction can not be ; on the contrary, some of the reactions yo ah just a small space of the transition state would not accept that kind of restriction, which constitutes a selective type catalytic transition state restrictions.
ZSM-5 zeolite used in this transition state selectivity of catalytic reactions, the biggest advantage is to prevent coking. Because ZSM-5 zeolite 5a having a smaller than the other bore, is not conducive to Jiaosheng Cheng precursor polymerization reaction requires a large transition state formed. Thus has a longer life than other molecular sieves and amorphous catalyst.

Several patents of ZSM-5 Zeolite

Our patents on a wide range of molecular sieve, which on ZSM-5 zeolite patent projects is endless.  Today, manufacturers of ZSM-5 zeolite adsorbent Tech Shandong 齐鲁华 letter on to introduce several patents on ZSM-5 Zeolite.
 Using the direct method of ZSM-5 zeolite catalyst developed a number of new patents:
 (1) NKC-01: After the catalyst was replaced by a boron trifluoride catalyst in the synthesis of ethylene glycol ether production, yield increased by 20%, the main raw materials fell 21 percent, reduce the cost of 2,000 yuan per ton of product, and the elimination of boron trifluoride corrosion and contamination of the equipment on the environment.  State Board of Education Science and Technology Progress Award.
 (2) NKC-03 A: dehydration of ethanol to ethylene catalyst than conventional alumina catalyst low reaction temperature 100 ° C, 1-2 times higher airspeed, save energy, improve production efficiency.  National Invention Award Sidengjiang.
 (3) NKC-8912 catalyst ethylbenzene, ethanol synthesis for two ethylbenzene production, allows for two ethylbenzene selectivity of 95-98% dependent on imports for the production of long-xylene separation of adsorbent started a catalytic Synthesis of new technology, so that our "right B diphenyl," the production will achieve localization.  This catalyst has been adopted by the National Natural Science Foundation, Department of Chemistry, chaired identification.

Japan CDS-1 successfully developed a new type of molecular sieve

Recently, Xiao Bian understand a message from the Japanese National Institute of Advanced Industrial Science and Technology (AIST) synthesis of a novel activated zeolite powders CDS-1 has been successfully developed.
 It was prepared by a layered silicate, has a unique structure - by molecular stacking blocks.  According to the institute, said the film chemistry lab, CDS-1 between its silicate layers has many pores.  Research center will work processing CDS-1 into the film, mainly used for the separation agent catalyst.  Typically, the use of a structure-directing agent (Structure-directing agent) complex can be formed by hydrothermal synthesis of nanosized pore size.  These pores may be at about 420 ℃, using condensation polymerization method easily and economically be bonded together to form a silicate layer.
 This made one molecular structure but retain the layered silicate framework is without precedent.  Molecular sieves containing silicon, aluminum and oxygen atoms.  When the silica-alumina composite containing a high proportion of silicon, called a high-silica zeolite.  This kind of molecular sieve is hydrophobic and high temperature.  AIST has a molecular sieve such intellectual property rights, the Department of silicon and oxygen by a silicate system.  It is resistant to high temperature above 800 ℃ and chemical resistance.  When immersed in a solution of an acid or a base, and still retains its original structure.

Molecular sieve Introduction

Molecular sieve is a cubic lattice aluminosilicate compound having. Molecular sieve has a uniform porous structure, the diameter of its pores of uniform size, these cavities can adsorb molecules smaller diameter than the bore to the interior, and the polarity molecular sieves 3a of the molecules and the preferential adsorption of the unsaturated molecules having a capacity, which can very different degree, a different degree of saturation, and the boiling point of different molecular size to separate different molecules, which has the effect of "screening" of molecules, so called synthetic zeolite powder molecular sieves. Since the molecular sieves have a high adsorption capacity, high thermal stability, etc. The other adsorbents that are not so widely used to obtain the molecular sieve.

Dynamic dry

Definition: the weight of the adsorbent filled in a column adsorption, so that a certain concentration of the solution at a constant regeneration of molecular sieves temperature at a constant rate flow, so as measured by the adsorption capacity and adsorption capacity balance. (Liquid or gas to be treated by the downward flow of adsorbent from the adsorption is called dynamic.) Application: 1, air drying: warehouse, cargo hold, pharmaceutical, precision machinery, electronic Activated zeolite powders equipment factory, compressed air, instrument air dry. 2, the purification of industrial gas dehydration of: hydrogen, oxygen, nitrogen, chlorine, CO2, acetylene, ethylene, methane, ethane, propane, SO3, SO2, natural gas, coal gas.