Preparation of synthetic zeolite

According to Japan's "plaster and lime" magazine: synthetic zeolite powder generally use sodium silicate solution and sodium aluminate solution, and Na: O, 510:, AI: 03 and according to the provisions of the proportions of each component generated H20 aluminum silicate condensate glue, heated, crystallized synthesis. The synthesis conditions such as changing the mixing ratio of the respective components, the heating temperature and the like can be prepared by stirring a wide variety of synthetic zeolites. Synthetic zeolite has a unique crystal structure, pore size, surface field, adsorption separation energy, energy, and other physical and chemical properties of solid acidic ion-exchange, it is used as a functional substance is used as adsorbents, molecular sievess, ion exchangers, catalyst. Production of synthetic zeolite between 1957 and 1959 in Japan, such as the table below. The maximum demand of synthetic zeolite is used as a washing powder. Secondly, as an adsorbent, the amount of catalyst required is large, such as the 1989 production for other uses 8500 tons, the sorbent is 3500 tons, 3,000 tons of catalyst. Recently, the use of synthetic zeolite crystalline uniformity characteristics of particle shape and size as the plastic filler with an amount increasing. Other also as paper, rubber filler, deodorant, preservatives, anti-bacterial agent. Especially as pharmaceuticals, electronic materials, high functional materials have been partially practical

The country has made great breakthroughs of the zeolite molecular sieve materials research

Zeolite is a crystalline aluminosilicate hydrate of metal salt, defined by the formula: Mx / m [(AlO2) x · (SiO2) y] · zH2O. M represents a cation, m represents the number of its valence, z is a hydration number, x and y are integers. After the activation of zeolites, the water molecules are removed, the remaining atoms to form a cage-like structure, a pore size of 3 ~ 10 & Aring ;. Molecular sieve crystals have a number of holes with a diameter (also called "window") is connected between a plurality of holes of a certain size, a hole. Because molecular sieve can adsorb molecules smaller than the pore diameter into the hole inside, but larger than the pore size of the molecular exclusion in its hole, but played the role of screening molecules, so named molecular sieves.
Progress made series FJIRSM CAS researcher Zhang Jian led the research team recently on the zeolite molecular sieve oxysiv materials research. Research group designed and synthesized a series of metal organic zeolite material not only has a higher specific surface area and pore structure excellent regulation performance, and hydrogen storage, carbon dioxide capture and catalysis research shows potential applications.

The Task Force also benefit organic framework compounds successfully synthesized molecular sieve type case has MTN topology fluorescent molecular sieve materials development provides a new idea. In addition, they are still the class of molecular sieve material gas adsorption and catalytic properties of the series has also made progress in other chiral porous materials developed for CO2 adsorption capacity of porous material than has been reported.
Zeolite adsorption has two characteristics:
(1) Lewis center polar surface on strong;
(2) zeolite cages or channels of small size makes them very strong gravitational field. Therefore, the adsorption capacity of the adsorbate molecules is far more than other types of adsorbents. Even adsorbate partial pressure (or concentration) is low, the adsorption capacity is still considerable. Zeolite adsorption separation not only with the size and shape of the adsorbate molecules, but also on their polarity, and therefore, zeolitic molecular sieves can also be used to separate substances of similar size.

Molecular sieve adsorber inlet troubleshooting lessons

In the molecular sieve adsorption process influent failure in quite a few detours, but also summed up the following experience and lessons learned.
(1) When they find on the cooling tower, pump flow is not under major changes occur, and the bottom opening of the continuing return valve hours, should be especially vigilant, not superstition gauge.
(2) in the event of a molecular sieve adsorber water failure, can not be left to chance, be sure to stop as soon as possible, in order to avoid further loss.
(3) for the molecular sieve has been immersed in water, usually at the site can not be processed, even after a high temperature regeneration 200qC above, nor to restore the adsorption capacity. Therefore, the best way is to take it to the manufacturer refeed kiln calcination.
(4) In dealing with molecular sieve beads sieve adsorber water failure, not only to the remaining water drain cleaner, more likely to pay attention to those lost to the compartment, wet sieve inside the tubes. Be sure to clear it clean, or because it is a large water content, the water will evaporate out of the running in the future, the formation of new pollution, affect the molecular sieve adsorption capacity.
For more information, please visit the relevant zeolite molecular sieve largest production base in Shandong Qilu Hua letter Tech Co.

Zeolite industry literature: "China Zeolite industry trends analysis and forecast report"

Zeolite industry literature: "China Zeolite industry trends analysis and forecast report"
Zeolite industry literature: "China zeolite desiccant industry trends analysis and forecast report" to solve: how to fully understand the overall status quo sieve industry; how to understand the macro-environment of the molecular sieve industry; how to know the relevant policies of the industry to take on a molecular sieve, and seize opportunities ; how to predict the future development trend of China's sieve industry, and to take appropriate countermeasures; how to understand competitors' business strategy, and seize opportunities in the competition. Chinese sieve analysis of industry trends and forecast report will make a detailed analysis of these issues.

China Zeolite industry trends analysis and forecast report mainly uses national statistics, Customs, bank data, industrial and commercial tax department data, securities transaction data, Internet data, Commerce Department data, and other commercial databases.

China zeolite adsorbent industry trends analysis and forecast report based on years of research on the molecular sieve industry, combined with molecular sieve law of supply and demand changes in the industry over the years, based on the domestic market, taking into account the global market environment, industries and enterprises within the zeolite group conducted in-depth investigation and research. Meanwhile, the Chinese industry trends sieve analysis and forecast report also for the industry and its downstream molecular sieve characteristics of the industry, from different angles cut into the industry, as a molecular sieve industry enterprises provides a powerful data support and professional market orientation. And to provide authoritative for enterprise development strategies, investment decisions and business management, adequate and reliable decision-making. Chinese sieve analysis of industry trends and forecast report focuses on official statistics, using quantitative and qualitative research methods in writing from.

Y zeolite effect

When a sample solution containing various molecules slowly flows through the gel column, each molecule in the column simultaneously with two different motion: vertical downward movement and non-directed diffusion movement. Macromolecules due to a larger diameter, not easy to enter pores of the gel particles, but only the distribution between the particles, the moving down when eluted faster. After the addition to the proliferation of small molecules in the gel particle gap, you can also enter the pores of the gel particles that enter the gel phase in the process of moving down in a gel diffusion from the particle gap then enter another gel particles, so continue to enter and spread down the speed of small molecules behind the macromolecules so large molecules in the sample elutes from the column first, slower middle molecules, molecular sieve oxysiv smallest final outflows, a phenomenon called molecular sieve effect.

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 zeolite 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 molecular sieve. 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.

Modern gas purification activated alumina

Modern gas purification activated alumina, water vapor and some of the liquid has the ability to selective adsorption.zeolite desiccant After removing the water saturation adsorption regeneration can be heated at about the recovery 175-315 ℃.  dehydration of natural gas  Adsorption and regeneration can be repeated rehabilitation. In addition to use as a desiccant, it can also adsorb vapors from contaminated lubricating oxygen, hydrogen, carbon dioxide, natural gas or the like. And are useful as catalysts and catalyst supports, and chromatography carrier.
Modern water purification  4a zeolite powder  activated alumina is white spherical porous particles, particle size uniformity, smooth surface, high mechanical strength, moisture absorption, no swelling maintain the status quo does not crack after absorbing water, non-toxic, odorless, insoluble in water, ethanol, fluoride has a strong adsorption, mainly used in high fluoride areas of fluoride in drinking water.