3529results about "Crystalline aluminosilicate zeolites" patented technology

The present invention relates to an electronic atomization cigarette which only contains nicotine without harmful tar. The electronic atomization cigarette includes a shell and a mouthpiece. The external wall of the shell has an air inlet. An electronic circuit board, a normal pressure cavity, a sensor, a vapor-liquid separator, an atomizer, a liquid-supplying bottle are sequentially provided within the shell, wherein the electronic circuit board comprises an electronic switching circuit and a high frequency generator. A stream passage of the sensor is provided on one side of the sensor, and a negative pressure cavity is provided in the sensor. The atomizer and the liquid-supplying bottle is in contact with each other. An atomization cavity is arranged in the atomizer. A retaining ring for locking the liquid-supplying bottle is provided between one side of the liquid-supplying bottle and the shell, and an aerosol passage is provided on the other side of the liquid-supplying bottle. The air inlet, normal pressure cavity, vapor-liquid separator, atomizer, aerosol passage, gas vent and mouthpiece are sequentially interconnected. The advantages of the present invention include smoking without tar, significantly reducing the cancerogenic risk. Furthermore, users still feel as if they are smoking and experiencing the same excitement, and the cigarette is no need to be lit and is no fire risk.

The present invention belongs to the field of inorganic nanometer material technology, in particular, it relates to a method for preparing mesoporous molecular sieve carrier material by using diblockmacromolecular polymer. It is characterized by that under the acid condition it uses polyoxyethylene-polyoxybutylene diblock macromolecular surfactant as template agent and makes hydrothermal synthesis at 100 deg.C to prepare mesoporous silicon oxide material with two-dimensional hexagonal structure with high degree of order and large specific surface area and laminate silicon oxide material withhigh degree of order. These new material can be used as catalyst, catalyst carrier, adsorption film, organic-inorganic composite material, sensor and chromatographic packing, etc.

A method of synthesizing an olefin epoxidation catalyst comprises the step of treating a porous crystalline aluminosilicate material having an X-ray diffraction pattern including d-spacing maxima at 12.4+/-0.25, 6.9+/-0.15, 3.57+/-0.07 and 3.42+/-0.07 Angstrom, such as MCM-22, with a dealuminating agent under conditions effective to remove framework aluminium from the material and produce a dealuminated product. The dealuminated product is then treated with a titanium-containing material under conditions effective to insert titanium into the dealuminated product and produce a titanium-containing, dealuminated catalyst composition. The resultant catalyst is useful in the epoxidation of olefins, such as propylene and cyclohexene, with hydrogen peroxide and organic hydroperoxides.

One aspect of the present invention relates to mesostructured zeolites. The invention also relates to a method of preparing mesostructured zeolites, as well as using them as cracking catalysts for organic compounds and degradation catalysts for polymers.

A composite millipore-mesopore molecular sieve is prepared through proportionally adding millipore Zeolite molecular sieve ZSM-5, beta-zeolite, mordenite, L-zeolite, MCM-22 and ZSM-35 to the solution of sodium hydroxide, stirring, adding the template agent of mesopore molecular sieve, crystallizing at 90-120 deg.C for 22-26 hr, regulating pH=7.5-7.9, and static crystallizing at 90-120 deg.c for 24-168 hr.

A process for easily synthesizing a zeolite substance containing an element having a large ionic radius in the framework at a high ratio. This process comprises the following first to fourth steps: First Step: a step of heating a mixture containing a template compound, a compound containing a Group 13 element of the periodic table, a silicon-containing compound and water to obtain a precursor (A); Second Step: a step of acid-treating the precursor (A) obtained in the first step; Third Step: a step of heating the acid-treated precursor (A) obtained in the second step together with a mixture containing a template compound and water to obtain a precursor (B); and Fourth Step: a step of calcining the precursor (B) obtained in the third step to obtain a zeolite substance.

The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.

An inorganic material that consists of at least two elementary spherical particles, each of said spherical particles comprising metal nanoparticles that are between 1 and 300 nm in size and a mesostructured matrix with an oxide base of at least one element X that is selected from the group that consists of aluminum, titanium, tungsten, zirconium, gallium, germanium, tin, antimony, lead, vanadium, iron, manganese, hafnium, niobium, tantalum, yttrium, cerium, gadolinium, europium and neodymium is described, whereby said matrix has a pore size of between 1.5 and 30 nm and has amorphous walls with a thickness of between 1 and 30 nm, said elementary spherical particles having a maximum diameter of 10 μm. Said material can also contain zeolitic nanocrystals that are trapped within said mesostructured matrix.

There are provided mesoporous silica materials containing in their pores stabilized clusters of silicon atom, of size 2 nanometers or less, and capable of photoluminescence to emit fast photons. They are prepared by chemical vapor deposition of silicon or a silicon precursor such as disilane, under soft conditions such as temperature of 100-150 DEG C., into the mesopores of silicate films which have mesoporous channels prepared by growth of the films using a template to control their sizes, but without removing the template residues from the films prior to the chemical vapor deposition. The template residues serve to limit the size of the silicon clusters which conform. The use of the soft conditions on CVD retains the template residues in an intact, substantially unchanged form. The resultant films have clusters of silicon, of 2 nanometer size or less, anchored to the mesopores, and air stable, so that they can be used in optoelectronic devices in conjunction with standard silicon semiconductors.

The synthesis of a crystalline material, in particular, a high silica zeolite, comprising a chabazite-type framework molecular sieve is conducted in the presence of an organic directing agent having the formula:

[R¹R²R³N—R⁴]⁺Q⁻

wherein R¹ and R² are independently selected from hydrocarbyl groups and hydroxy-substituted hydrocarbyl groups having from 1 to 3 carbon atoms, provided that R¹ and R² may be joined to form a nitrogen-containing heterocyclic structure, R³ is an alkyl group having 2 to 4 carbon atoms and R⁴ is selected from a 4- to 8-membered cycloalkyl group, optionally, substituted by 1 to 3 alkyl groups each having from 1 to 3 carbon atoms; and a 4- to 8-membered heterocyclic group having from 1 to 3 heteroatoms, said heterocyclic group being, optionally, substituted by 1 to 3 alkyl groups each having from 1 to 3 carbon atoms and the or each heteroatom in said heterocyclic group being selected from the group consisting of O, N, and S, or R³ and R⁴ are hydrocarbyl groups having from 1 to 3 carbon atoms joined to form a nitrogen-containing heterocyclic structure; and Q⁻ is a anion.

Crystalline molecular sieves are prepared using a mixture comprising an organic structure directing agent capable of forming the molecular-sieve and an N,N,N-trialkyl benzyl quaternary ammonium cation.

The invention discloses a method for recycling molecular sieve crystallization mother solution, which comprises the following steps of: (1) preparing a material for synthesizing a molecular sieve, gelatinizing, crystallizing, filtering, and collecting all molecular sieve crystallization mother solution; (2) using the obtained all molecular sieve crystallization mother solution for synthesis of the molecular sieve directly, mixing with a solid silicon source, an aluminum source and alkali, and adding or not adding molecular sieve seed crystals and a template agent to obtain a reaction mixture; and (3) crystallizing the obtained reaction mixture according to the conventional hydrothermal method, obtaining a filter cake, namely a molecular sieve product, and filtering and collecting all molecular sieve crystallization mother solution, wherein the obtained all molecular sieve crystallization mother solution can be circularly utilized according to the sequence of steps (2) and (3). In the synthesis of the molecular sieve, alkaline waste liquor is not discharged basically, the total silicon utilization rate is more than or equal to 90 percent, and the yield of the molecular sieve product is over 90 percent.

The invention discloses a preparation method for a Beta zeolite molecular sieve with a hierarchical porous structure. Ethyl orthosilicate is used as a silicon source, sodium metaaluminate is used as an aluminum source, hexaammonio cationic quaternary ammonium surfactant is used as a template, and then the hierarchical porous zeolite molecular sieve containing meso pores and Beta zeolite micropores is prepared by using a hydro-thermal synthesis process under an alkaline condition. According to the invention, the hexaammonio cationic quaternary ammonium surfactant is used as a Beta zeolite structure guiding agent and generates micropores, aggregation of hydrophobic long-chain alkyl groups on the surfactant forms the meso pores, so the prepared Beta zeolite molecular sieve has both meso pores and the crystalline micropores. The structure with both the meso pores and the micropores enables defects of a single pore structure to be avoided and mass transfer efficiency to be improved, and the Beta zeolite molecular sieve has a wide application prospect in aspects of macro-molecular catalysis, adsorption, separation, etc.

Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.

The synthesis of a crystalline aluminophosphate or silicoaluminophosphate molecular sieve having a chabazite-type framework type is conducted in the presence of an organic directing agent having the formula (I)

[R¹R²R³N—R⁴]⁺X⁻  (I)

wherein R¹, R² and R³ are independently selected from the group consisting of alkyl groups having from 1 to 3 carbon atoms and hydroxyalkyl groups having from 1 to 3 carbon atoms; R⁴ is selected from the group consisting of 4- to 8-membered cycloalkyl groups, optionally substituted by 1 to 3 alkyl groups having from 1 to 3 carbon atoms; 4- to 8-membered heterocyclic groups having from 1 to 3 heteroatoms, said heterocyclic groups being optionally substituted by 1 to 3 alkyl groups having from 1 to 3 carbon atoms and the heteroatoms in said heterocyclic groups being selected from the group consisting of O, N, and S; and aromatic groups optionally substituted by 1 to 3 alkyl groups, said alkyl groups having from 1 to 3 carbon atoms; and X⁻ is an anion.

The invention relates to a method for preparing a molecular sieve, which comprises the following steps: the molecular sieve is introduced in a gas phase ultra-stable reactor, the gas phase ultra-stable reactor is capable of moving the molecular sieve from the molecular sieve inlet of the gas phase ultra-stable reactor to the molecular sieve outlet of the gas phase ultra-stable reactor under the condition that carrying gas is not used for conveying, and the molecular sieve and gas-phase silicon tetrachloride are contacted for reacting in the gas phase ultra-stable reactor. The conveying of the molecular sieve does not require inertia carrying gas, the technology flow is simplified, carrying gas amount is saved, and the consumption of silicon tetrachloride can be greatly reduced.

The invention relates to a method for synthesizing IM-5 molecular sieve, which comprises the following steps: 1) dissolving inorganic base, aluminum source and a template in deionized water, uniformly mixing; 2) adding silicon source in a mixture obtained in the step 1), adding an additive or not to prepare colloid or a solid-liquid mixture, uniformly mixing; 3) moving the colloid or the solid-liquid mixture obtained in the step 2) to a crystallization kettle, carrying out hydrothermal dynamic crystallization at the temperature of 120-200 DEG C for 1-10 days, cooling after finishing the crystallization, washing the obtained mixed liquor, filtering and drying to obtain the IM-5 molecular sieve raw powder; wherein the mole ratio of the reactant is SiO2: Al2O3:M2O: R: H2O with 60: (0.3-6): (6-20): (0.6-18): (300-1800), M2O is alkali metal oxide and R is the template. The method of the invention has the advantages that IM-5 molecular sieve crystallization time is shortened, the raw material ratio range is wide, the single kettle yield is enhanced and the industrial amplification can be achieved.