Application of molecular sieves 4A

Detergent additives: 4A zeolite as a detergent additive main function is to produce calcium ion exchange water softening, remove dirt and prevent redeposition. zeolite 4a is currently applied on behalf of the largest builders of phosphorus and most mature product. 4A Zeolite replace sodium tripolyphosphate as detergent additives to solve the environmental pollution has a major role. 4A Zeolite forming agent can also be used soap, toothpaste friction agent.
Sewage: molecular sieves 4a can remove sewage NH3-N, and Pb2 +, Cu2 +, Zn2 + ,, Cd2 + and so on. Industry, agriculture, animal husbandry and aquatic civilian discharged wastewater containing ammonia nitrogen, not only endanger the survival of fish, in the farming environment pollution, and promote algae growth, leading to blockage of rivers and lakes. molecular sieves 4a due to high selectivity of NH4 + exchangeable, has been successfully applied in the field. Sewage from metal mines, smelters, metal surface treatment and chemical emissions from industry and other sectors, which contains heavy metal ions harmful to human health. 4A molecular sieves with sewage in addition to those qualified to ensure the water quality, but also the recovery of heavy metals.
Other uses:
(1) Water ---- hard water softener, can replace the current widespread use of sulfonated coal, thereby reducing costs;
(2) Metallurgical Industry ---- separating agent, separation, extraction of brine potassium, rubidium, and cesium. In industry for the enrichment, separation and extraction of metals and other processes;
(3) petrochemical industry ---- catalysts, desiccants, adsorbents;
(4) ---- agricultural soil conditioner;
(5) Pharmaceutical ---- silver zeolite antimicrobial agent.

Molecular sieve chromatography

molecular sieve chromatography, also known as gel or gel filtration chromatography. Gel filtration is the use of a certain pore size range of porous gel as the stationary phase, the components of the mixture according to molecular size separating chromatographic technique. A substance having a 13x molecular sieves action are many, such as pumice, agar, agarose, polyvinyl alcohol, polyacrylamide, dextran gels and the like. Sephadex most widely trade name sephadex many models, from G10 to G200, its main applications are: ① fractionation various antigens and antibodies; ② remove complexes of small molecules. Such as desalination, fluorescein and free radioisotopes as well as protein hydrolysis fragments; ④ Determination of the molecular weight; ③ Analysis of immune complexes in serum.

Zeolite Introduction

molecular sieve is a cubic lattice of an 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 internal bore, and an unsaturated polar molecules and molecules having a preferential adsorption capacity, and thus able to very different degree, different degree of saturation, and boiling points of different molecular sizes of different molecules separated, that has the effect of "screening" elements, so called molecular sieves. Since the molecular sieve have a high adsorption capacity, high thermal stability other adsorbents that are not so widely applied molecular sieve.
In the field of biological macromolecules, a common bio-rad SEC sieve prepacked columns.
US scientists have found that by adjusting the temperature, to precisely control one titanium silicate material pore size, to create a sophisticated molecular sieve. Some internal crystal material has a large number of uniform pore size smaller than the molecules can pass through the holes, while large molecules can not pass through, and thus serves to separate different molecular sieve 3a, such materials are known as molecular sieve.
In fact, in 2001, scientists in the UK "Nature" magazine reported that they had discovered a titanium silicate material known as ETS-4 can be used as a good molecular sieve. When the temperature rises, ETS-4 will gradually dehydrated, pore size decreases. Finely adjust the pore size in the use of this method, (1 angstrom equals one billion of a meter) in the 3-4 Angstroms range. Scientists say some common elements such as nitrogen, methane, oxygen, argon and water molecules are about the size of 3-4 Å, another is almost the same size, molecular sieve made with ETS-4 can effectively separate them. Researchers have experimented with ETS-4 from the nitrogen content in the mixture of nitrogen and methane, from 18% to 5%, and in the separation of argon and oxygen, nitrogen and oxygen experiments have been successful. It is believed that this technology will have important commercial

Performance and structure of molecular sieve

Performance: zeolite powdery crystals with metallic luster, hardness of 3 to 5, the relative density of 2 to 2.8, color natural zeolite, synthetic zeolite adsorbentobtained as a white, water-insoluble, heat stability and acid resistance as SiO2 / Al2O3 composition ratio increases and improved. Molecular sieves have a great specific surface area, up to 300 ~ 1000m2 / g, the inner surface of the crystal highly polarized, as a class of highly efficient adsorbents, also a type of solid acid, the surface has a high acid concentration and acid strength, can cause carbonium catalytic ionic reactions. When the composition of the metal ions and other ions in solution were exchanged, adjustable aperture, changes its absorption properties and catalytic properties, which molecular sieve catalyst prepared with different properties.
Structure: proteoglycan thus formed polymer tortuous coiled, forming a sieve-like microporous structure, known as molecular sieves. Microporous molecular sieve which only allows material through is less than, greater than the pores of macromolecular substances, bacteria and the like having a barrier function is. The matrix becomes the limiting diffusion of harmful substances such as bacteria defensive barrier. Hemolytic streptococcus and cancer cells can produce hyaluronidase, the decomposition of proteoglycan, destruction of the matrix structure, to be spread. On binding proteoglycan aggregate also many hydrophilic groups, capable of binding water molecules, forming extracellular "reservoirs."

Zeolite drying technology

Conventional molecular sieve drying technique commonly used hot air natural gas drying technology, and microwave drying technology to solve the traditional dry sieve drying slow, energy loss, poor product quality problems, in particular in: 1, microwave drying fast molecular sieve, generally a few minutes 2 can achieve the purpose of microwave drying, microwave drying sieve evenly to achieve the depth of dry, good product quality; 3, still dry, do not burn with less dust; 4, microwave drying molecular sieve process safety, energy conservation, environmental protection and the use of electricity, dry inside and outside at the same time, electric drying than saving more than 50%; 5, shorten the production cycle, greatly reducing the production of working capital; 6, microwave drying equipment cabinet temperature below 40 ℃, improve workers' working environment.

Mordenite

SEM morphological characteristics of the micro-fiber traits, like thin filaments straight or slightly curved, a diameter of about 0.2mm, length up to several mm, for authigenic minerals,

but also to see the alteration minerals in the outer, radially gradually separated formation of fibrillar mordenite. Such reform should mordenite type minerals. EDX spectrum of the primary Si, Al, Ca, Na.